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Refactor whole app

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This commit is contained in:
Lena Fuhrimann 2017-05-08 23:07:07 +02:00
parent 1536bc9649
commit fdc0ae2dd0
239 changed files with 45044 additions and 562 deletions
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8
.cfignore
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@ -1,3 +1,5 @@
vendor
s3-manager
README.md
*
!/templates
!/entrypoint-cf.sh
!/s3manager

3
.gitignore vendored
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@ -1,2 +1 @@
vendor
s3-manager
/s3manager

9
Dockerfile
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@ -1,3 +1,10 @@
FROM golang:onbuild
FROM golang
ADD . /go/src/github.com/mastertinner/s3manager
WORKDIR /go/src/github.com/mastertinner/s3manager
RUN go build ./cmd/s3manager
EXPOSE 8080
CMD ./s3manager -endpoint "${S3_ENDPOINT}" -access-key-id "${S3_ACCESS_KEY_ID}" -secret-access-key "${S3_SECRET_ACCESS_KEY}"

43
Gopkg.lock generated Normal file
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@ -0,0 +1,43 @@
memo = "2564b0b342a1586a24a3ff5356636c822f6351da32f8ee9497ab8694855e80b1"
[[projects]]
name = "github.com/davecgh/go-spew"
packages = ["spew"]
revision = "346938d642f2ec3594ed81d874461961cd0faa76"
version = "v1.1.0"
[[projects]]
name = "github.com/gorilla/context"
packages = ["."]
revision = "1ea25387ff6f684839d82767c1733ff4d4d15d0a"
version = "v1.1"
[[projects]]
name = "github.com/gorilla/mux"
packages = ["."]
revision = "392c28fe23e1c45ddba891b0320b3b5df220beea"
version = "v1.3.0"
[[projects]]
branch = "master"
name = "github.com/mastertinner/adapters"
packages = [".","logging"]
revision = "3bfe6170b9beca289d89e4c703c7f9db68e7c158"
[[projects]]
name = "github.com/minio/minio-go"
packages = [".","pkg/encrypt","pkg/policy","pkg/s3signer","pkg/s3utils","pkg/set"]
revision = "2f03abaa07d8bc57faef16cda7655ea62a7e0bed"
version = "v2.1.0"
[[projects]]
name = "github.com/pmezard/go-difflib"
packages = ["difflib"]
revision = "792786c7400a136282c1664665ae0a8db921c6c2"
version = "v1.0.0"
[[projects]]
branch = "master"
name = "github.com/stretchr/testify"
packages = ["assert"]
revision = "4d4bfba8f1d1027c4fdbe371823030df51419987"

76
Gopkg.toml Normal file
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@ -0,0 +1,76 @@
## Gopkg.toml example (these lines may be deleted)
## "required" lists a set of packages (not projects) that must be included in
## Gopkg.lock. This list is merged with the set of packages imported by the current
## project. Use it when your project needs a package it doesn't explicitly import -
## including "main" packages.
# required = ["github.com/user/thing/cmd/thing"]
## "ignored" lists a set of packages (not projects) that are ignored when
## dep statically analyzes source code. Ignored packages can be in this project,
## or in a dependency.
# ignored = ["github.com/user/project/badpkg"]
## Dependencies define constraints on dependent projects. They are respected by
## dep whether coming from the Gopkg.toml of the current project or a dependency.
# [[dependencies]]
## Required: the root import path of the project being constrained.
# name = "github.com/user/project"
#
## Recommended: the version constraint to enforce for the project.
## Only one of "branch", "version" or "revision" can be specified.
# version = "1.0.0"
# branch = "master"
# revision = "abc123"
#
## Optional: an alternate location (URL or import path) for the project's source.
# source = "https://github.com/myfork/package.git"
## Overrides have the same structure as [[dependencies]], but supercede all
## [[dependencies]] declarations from all projects. Only the current project's
## [[overrides]] are applied.
##
## Overrides are a sledgehammer. Use them only as a last resort.
# [[overrides]]
## Required: the root import path of the project being constrained.
# name = "github.com/user/project"
#
## Optional: specifying a version constraint override will cause all other
## constraints on this project to be ignored; only the overriden constraint
## need be satisfied.
## Again, only one of "branch", "version" or "revision" can be specified.
# version = "1.0.0"
# branch = "master"
# revision = "abc123"
#
## Optional: specifying an alternate source location as an override will
## enforce that the alternate location is used for that project, regardless of
## what source location any dependent projects specify.
# source = "https://github.com/myfork/package.git"
[[dependencies]]
name = "github.com/davecgh/go-spew"
version = "^1.1.0"
[[dependencies]]
name = "github.com/gorilla/mux"
version = "^1.3.0"
[[dependencies]]
branch = "master"
name = "github.com/mastertinner/adapters"
[[dependencies]]
name = "github.com/minio/minio-go"
version = "^2.1.0"
[[dependencies]]
name = "github.com/pmezard/go-difflib"
version = "^1.0.0"
[[dependencies]]
branch = "master"
name = "github.com/stretchr/testify"

12
Makefile Normal file
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@ -0,0 +1,12 @@
all:
go build ./cmd/s3manager
test:
go test
build-docker:
docker run --rm -v "${PWD}:/go/src/github.com/mastertinner/s3manager" -w /go/src/github.com/mastertinner/s3manager golang go build ./cmd/s3manager
deploy-cf:
GOOS=linux GOARCH=amd64 go build ./cmd/s3manager
cf push

26
README.md
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@ -1,21 +1,13 @@
# S3 Manager
[![Build Status](https://travis-ci.org/mastertinner/s3-manager.svg?branch=master)](https://travis-ci.org/mastertinner/s3-manager)
[![Build Status](https://travis-ci.org/mastertinner/s3manager.svg?branch=master)](https://travis-ci.org/mastertinner/s3manager)
A Web GUI written in Go to manage S3 buckets from any provider.
## Environment Variables
* `S3_ACCESS_KEY_ID`: Required. Your S3 access key ID
* `S3_SECRET_ACCESS_KEY`: Required. Your S3 secret access key
* `S3_ENDPOINT`: Optional. In case you are using a different S3 provider than AWS. Defaults to `s3.amazonaws.com`
* `V2_SIGNING`: Optional. In case your S3 provider still uses V2 Signing, set this to `true`
## Run locally
1. Run `go build`
1. Set environment variables in your env
1. Execute the binary and visit <http://localhost:8080>
1. Run `make`
1. Execute the created binary and visit <http://localhost:8080>
## Run with Docker
@ -25,14 +17,14 @@ A Web GUI written in Go to manage S3 buckets from any provider.
## Build with Docker and run anywhere
1. Run `docker run --rm -v "${PWD}:/go/src/github.com/mastertinner/s3-manager" -w /go/src/github.com/mastertinner/s3-manager golang curl https://glide.sh/get | sh && glide install && go build`
1. Run `make build-docker`
To cross-compile for windows, use the `-e "GOOS=windows" -e "GOARCH=amd64"` flags (depending on your system, you might have to adjust `GOARCH`)
To cross-compile for windows, add the `-e "GOOS=windows" -e "GOARCH=amd64"` flags to the `Makefile` (depending on your system, you might have to adjust `GOARCH`)
To cross-compile for macOS, use the `-e "GOOS=darwin" -e "GOARCH=amd64"` flags (depending on your system, you might have to adjust `GOARCH`)
To cross-compile for macOS, add the `-e "GOOS=darwin" -e "GOARCH=amd64"` flags to the `Makefile` (depending on your system, you might have to adjust `GOARCH`)
## Run on Cloud Foundry
1. Set environment variables in `manifest.yml`
1. Set host that isn't taken yet in `manifest.yml`
1. Run `cf push`
1. Change the service in `manifest.yml` to be the name of your S3 service (if you are using an external S3 provider, you'll have to switch the service type in `run-cf.sh` from `dynstrg` to `user-provided` and create the respective user-provided service with `cf create-user-provided-service`)
1. Change `host` in `manifest.yml` to something that isn't taken yet
1. Run `make deploy-cf`

28
bucket-view.go
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@ -1,4 +1,4 @@
package main
package s3manager
import (
"html/template"
@ -9,23 +9,23 @@ import (
minio "github.com/minio/minio-go"
)
// ObjectWithIcon is a minio object with an added icon
type ObjectWithIcon struct {
// objectWithIcon is a minio object with an added icon.
type objectWithIcon struct {
minio.ObjectInfo
Icon string
}
// BucketPage defines the details page of a bucket
type BucketPage struct {
// bucketPage defines the details page of a bucket.
type bucketPage struct {
BucketName string
Objects []ObjectWithIcon
Objects []objectWithIcon
}
// BucketViewHandler shows the details page of a bucket
func BucketViewHandler(s3 S3Client) http.Handler {
// BucketViewHandler shows the details page of a bucket.
func BucketViewHandler(s3 S3) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
bucketName := mux.Vars(r)["bucketName"]
var objs []ObjectWithIcon
var objs []objectWithIcon
l := path.Join(tmplDirectory, "layout.html.tmpl")
p := path.Join(tmplDirectory, "bucket.html.tmpl")
@ -49,16 +49,16 @@ func BucketViewHandler(s3 S3Client) http.Handler {
handleHTTPError(w, code, object.Err)
return
}
objectWithIcon := ObjectWithIcon{object, icon(object.Key)}
objs = append(objs, objectWithIcon)
obj := objectWithIcon{object, icon(object.Key)}
objs = append(objs, obj)
}
bucketPage := BucketPage{
page := bucketPage{
BucketName: bucketName,
Objects: objs,
}
err = t.ExecuteTemplate(w, "layout", bucketPage)
err = t.ExecuteTemplate(w, "layout", page)
if err != nil {
handleHTTPError(w, http.StatusInternalServerError, err)
return
@ -66,7 +66,7 @@ func BucketViewHandler(s3 S3Client) http.Handler {
})
}
// icon returns an icon for a file type
// icon returns an icon for a file type.
func icon(fileName string) string {
e := path.Ext(fileName)

25
bucket-view_test.go
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@ -1,4 +1,4 @@
package main
package s3manager_test
import (
"errors"
@ -9,6 +9,7 @@ import (
"testing"
"github.com/gorilla/mux"
"github.com/mastertinner/s3manager"
minio "github.com/minio/minio-go"
"github.com/stretchr/testify/assert"
)
@ -16,14 +17,14 @@ import (
func TestBucketViewHandler(t *testing.T) {
assert := assert.New(t)
tests := map[string]struct {
s3 S3Client
cases := map[string]struct {
s3 s3manager.S3
bucketName string
expectedStatusCode int
expectedBodyContains string
}{
"success (empty bucket)": {
s3: &S3ClientMock{
s3: &s3Mock{
Buckets: []minio.BucketInfo{
{Name: "testBucket"},
},
@ -33,7 +34,7 @@ func TestBucketViewHandler(t *testing.T) {
expectedBodyContains: "No objects in",
},
"success (with file)": {
s3: &S3ClientMock{
s3: &s3Mock{
Buckets: []minio.BucketInfo{
{Name: "testBucket"},
},
@ -46,7 +47,7 @@ func TestBucketViewHandler(t *testing.T) {
expectedBodyContains: "testBucket",
},
"success (archive)": {
s3: &S3ClientMock{
s3: &s3Mock{
Buckets: []minio.BucketInfo{
{Name: "testBucket"},
},
@ -59,7 +60,7 @@ func TestBucketViewHandler(t *testing.T) {
expectedBodyContains: "archive",
},
"success (image)": {
s3: &S3ClientMock{
s3: &s3Mock{
Buckets: []minio.BucketInfo{
{Name: "testBucket"},
},
@ -72,7 +73,7 @@ func TestBucketViewHandler(t *testing.T) {
expectedBodyContains: "photo",
},
"success (sound)": {
s3: &S3ClientMock{
s3: &s3Mock{
Buckets: []minio.BucketInfo{
{Name: "testBucket"},
},
@ -85,13 +86,13 @@ func TestBucketViewHandler(t *testing.T) {
expectedBodyContains: "music_note",
},
"bucket doesn't exist": {
s3: &S3ClientMock{},
s3: &s3Mock{},
bucketName: "testBucket",
expectedStatusCode: http.StatusNotFound,
expectedBodyContains: http.StatusText(http.StatusNotFound),
},
"s3 error": {
s3: &S3ClientMock{
s3: &s3Mock{
Err: errors.New("mocked S3 error"),
},
bucketName: "testBucket",
@ -100,12 +101,12 @@ func TestBucketViewHandler(t *testing.T) {
},
}
for tcID, tc := range tests {
for tcID, tc := range cases {
r := mux.NewRouter()
r.
Methods(http.MethodGet).
Path("/buckets/{bucketName}").
Handler(BucketViewHandler(tc.s3))
Handler(s3manager.BucketViewHandler(tc.s3))
ts := httptest.NewServer(r)
defer ts.Close()

6
buckets-view.go
View file

@ -1,4 +1,4 @@
package main
package s3manager
import (
"html/template"
@ -6,8 +6,8 @@ import (
"path"
)
// BucketsViewHandler shows all buckets
func BucketsViewHandler(s3 S3Client) http.Handler {
// BucketsViewHandler renders all buckets on an HTML page.
func BucketsViewHandler(s3 S3) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
l := path.Join(tmplDirectory, "layout.html.tmpl")
p := path.Join(tmplDirectory, "buckets.html.tmpl")

17
buckets-view_test.go
View file

@ -1,4 +1,4 @@
package main
package s3manager_test
import (
"errors"
@ -6,6 +6,7 @@ import (
"net/http/httptest"
"testing"
"github.com/mastertinner/s3manager"
minio "github.com/minio/minio-go"
"github.com/stretchr/testify/assert"
)
@ -13,13 +14,13 @@ import (
func TestBucketsViewHandler(t *testing.T) {
assert := assert.New(t)
tests := map[string]struct {
s3 S3Client
cases := map[string]struct {
s3 s3manager.S3
expectedStatusCode int
expectedBodyContains string
}{
"success": {
s3: &S3ClientMock{
s3: &s3Mock{
Buckets: []minio.BucketInfo{
{Name: "testBucket"},
},
@ -28,12 +29,12 @@ func TestBucketsViewHandler(t *testing.T) {
expectedBodyContains: "testBucket",
},
"success (bo buckets)": {
s3: &S3ClientMock{},
s3: &s3Mock{},
expectedStatusCode: http.StatusOK,
expectedBodyContains: "No buckets yet",
},
"s3 error": {
s3: &S3ClientMock{
s3: &s3Mock{
Err: errors.New("mocked S3 error"),
},
expectedStatusCode: http.StatusInternalServerError,
@ -41,12 +42,12 @@ func TestBucketsViewHandler(t *testing.T) {
},
}
for tcID, tc := range tests {
for tcID, tc := range cases {
req, err := http.NewRequest(http.MethodGet, "/buckets", nil)
assert.NoError(err, tcID)
rr := httptest.NewRecorder()
handler := BucketsViewHandler(tc.s3)
handler := s3manager.BucketsViewHandler(tc.s3)
handler.ServeHTTP(rr, req)

115
cmd/s3manager/main.go Normal file
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@ -0,0 +1,115 @@
package main
import (
"flag"
"log"
"net/http"
"os"
"github.com/gorilla/mux"
"github.com/mastertinner/adapters"
"github.com/mastertinner/adapters/logging"
"github.com/mastertinner/s3manager"
minio "github.com/minio/minio-go"
)
func main() {
var (
port = flag.String("port", "8080", "the port the app should listen on")
endpoint = flag.String("endpoint", "s3.amazonaws.com", "the s3 endpoint to use")
accessKeyID = flag.String("access-key-id", "", "your s3 access key ID")
secretAccessKey = flag.String("secret-access-key", "", "your s3 secret access key")
v2Signing = flag.Bool("v2-signing", false, "set this flag if your S3 provider still uses V2 signing")
)
flag.Parse()
if *accessKeyID == "" || *secretAccessKey == "" {
flag.Usage()
os.Exit(2)
}
// Set up S3 client
var s3 *minio.Client
var err error
if *v2Signing {
s3, err = minio.NewV2(*endpoint, *accessKeyID, *secretAccessKey, true)
} else {
s3, err = minio.New(*endpoint, *accessKeyID, *secretAccessKey, true)
}
if err != nil {
log.Fatalln(err)
}
// Set up logger
logger := log.New(os.Stdout, "", log.Ldate|log.Ltime)
// Set up router
r := mux.NewRouter().StrictSlash(true)
r.
Methods(http.MethodGet).
Path("/").
Handler(adapters.Adapt(
http.RedirectHandler("/buckets", http.StatusPermanentRedirect),
logging.Handler(logger),
))
r.
Methods(http.MethodGet).
Path("/buckets").
Handler(adapters.Adapt(
s3manager.BucketsViewHandler(s3),
logging.Handler(logger),
))
r.
Methods(http.MethodGet).
Path("/buckets/{bucketName}").
Handler(adapters.Adapt(
s3manager.BucketViewHandler(s3),
logging.Handler(logger),
))
r.
Methods(http.MethodPost).
Path("/api/buckets").
Handler(adapters.Adapt(
s3manager.CreateBucketHandler(s3),
logging.Handler(logger),
))
r.
Methods(http.MethodDelete).
Path("/api/buckets/{bucketName}").
Handler(adapters.Adapt(
s3manager.DeleteBucketHandler(s3),
logging.Handler(logger),
))
r.
Methods(http.MethodPost).
Headers(s3manager.HeaderContentType, s3manager.ContentTypeJSON).
Path("/api/buckets/{bucketName}/objects").
Handler(adapters.Adapt(
s3manager.CopyObjectHandler(s3),
logging.Handler(logger),
))
r.
Methods(http.MethodPost).
HeadersRegexp(s3manager.HeaderContentType, s3manager.ContentTypeMultipartForm).
Path("/api/buckets/{bucketName}/objects").
Handler(adapters.Adapt(
s3manager.CreateObjectHandler(s3),
logging.Handler(logger),
))
r.
Methods(http.MethodGet).
Path("/api/buckets/{bucketName}/objects/{objectName}").
Handler(adapters.Adapt(
s3manager.GetObjectHandler(s3),
logging.Handler(logger),
))
r.
Methods(http.MethodDelete).
Path("/api/buckets/{bucketName}/objects/{objectName}").
Handler(adapters.Adapt(
s3manager.DeleteObjectHandler(s3),
logging.Handler(logger),
))
log.Fatal(http.ListenAndServe(":"+*port, r))
}

14
copy-object.go
View file

@ -1,4 +1,4 @@
package main
package s3manager
import (
"encoding/json"
@ -8,18 +8,18 @@ import (
minio "github.com/minio/minio-go"
)
// CopyObjectInfo is the information about an object to copy
type CopyObjectInfo struct {
// copyObjectInfo is the information about an object to copy.
type copyObjectInfo struct {
BucketName string `json:"bucketName"`
ObjectName string `json:"objectName"`
SourceBucketName string `json:"sourceBucketName"`
SourceObjectName string `json:"sourceObjectName"`
}
// CopyObjectHandler allows to copy an existing object
func CopyObjectHandler(s3 S3Client) http.Handler {
// CopyObjectHandler copies an existing object under a new name.
func CopyObjectHandler(s3 S3) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
var copy CopyObjectInfo
var copy copyObjectInfo
err := json.NewDecoder(r.Body).Decode(&copy)
if err != nil {
@ -35,7 +35,7 @@ func CopyObjectHandler(s3 S3Client) http.Handler {
return
}
w.Header().Set(headerContentType, contentTypeJSON)
w.Header().Set(HeaderContentType, ContentTypeJSON)
w.WriteHeader(http.StatusCreated)
err = json.NewEncoder(w).Encode(copy)

8
create-bucket.go
View file

@ -1,4 +1,4 @@
package main
package s3manager
import (
"encoding/json"
@ -7,8 +7,8 @@ import (
minio "github.com/minio/minio-go"
)
// CreateBucketHandler creates a new bucket
func CreateBucketHandler(s3 S3Client) http.Handler {
// CreateBucketHandler creates a new bucket.
func CreateBucketHandler(s3 S3) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
var bucket minio.BucketInfo
@ -24,7 +24,7 @@ func CreateBucketHandler(s3 S3Client) http.Handler {
return
}
w.Header().Set(headerContentType, contentTypeJSON)
w.Header().Set(HeaderContentType, ContentTypeJSON)
w.WriteHeader(http.StatusCreated)
err = json.NewEncoder(w).Encode(bucket)

19
create-bucket_test.go
View file

@ -1,4 +1,4 @@
package main
package s3manager_test
import (
"bytes"
@ -7,38 +7,39 @@ import (
"net/http/httptest"
"testing"
"github.com/mastertinner/s3manager"
"github.com/stretchr/testify/assert"
)
func TestCreateBucketHandler(t *testing.T) {
assert := assert.New(t)
tests := map[string]struct {
s3 S3Client
cases := map[string]struct {
s3 s3manager.S3
body string
expectedStatusCode int
expectedBodyContains string
}{
"success": {
s3: &S3ClientMock{},
s3: &s3Mock{},
body: "{\"name\":\"myBucket\"}",
expectedStatusCode: http.StatusCreated,
expectedBodyContains: "{\"name\":\"myBucket\",\"creationDate\":\"0001-01-01T00:00:00Z\"}\n",
},
"empty request": {
s3: &S3ClientMock{},
s3: &s3Mock{},
body: "",
expectedStatusCode: http.StatusUnprocessableEntity,
expectedBodyContains: http.StatusText(http.StatusUnprocessableEntity),
},
"malformed request": {
s3: &S3ClientMock{},
s3: &s3Mock{},
body: "}",
expectedStatusCode: http.StatusUnprocessableEntity,
expectedBodyContains: http.StatusText(http.StatusUnprocessableEntity),
},
"s3 error": {
s3: &S3ClientMock{
s3: &s3Mock{
Err: errors.New("mocked S3 error"),
},
body: "{\"name\":\"myBucket\"}",
@ -47,12 +48,12 @@ func TestCreateBucketHandler(t *testing.T) {
},
}
for tcID, tc := range tests {
for tcID, tc := range cases {
req, err := http.NewRequest(http.MethodPost, "/api/buckets", bytes.NewBufferString(tc.body))
assert.NoError(err, tcID)
rr := httptest.NewRecorder()
handler := CreateBucketHandler(tc.s3)
handler := s3manager.CreateBucketHandler(tc.s3)
handler.ServeHTTP(rr, req)

6
create-object.go
View file

@ -1,4 +1,4 @@
package main
package s3manager
import (
"log"
@ -7,8 +7,8 @@ import (
"github.com/gorilla/mux"
)
// CreateObjectHandler allows to upload a new object
func CreateObjectHandler(s3 S3Client) http.Handler {
// CreateObjectHandler uploads a new object.
func CreateObjectHandler(s3 S3) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
err := r.ParseMultipartForm(32 << 20)
if err != nil {

6
delete-bucket.go
View file

@ -1,4 +1,4 @@
package main
package s3manager
import (
"net/http"
@ -6,8 +6,8 @@ import (
"github.com/gorilla/mux"
)
// DeleteBucketHandler deletes a bucket
func DeleteBucketHandler(s3 S3Client) http.Handler {
// DeleteBucketHandler deletes a bucket.
func DeleteBucketHandler(s3 S3) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
bucketName := mux.Vars(r)["bucketName"]
err := s3.RemoveBucket(bucketName)

15
delete-bucket_test.go
View file

@ -1,4 +1,4 @@
package main
package s3manager_test
import (
"errors"
@ -6,24 +6,25 @@ import (
"net/http/httptest"
"testing"
"github.com/mastertinner/s3manager"
"github.com/stretchr/testify/assert"
)
func TestDeleteBucketHandler(t *testing.T) {
assert := assert.New(t)
tests := map[string]struct {
s3 S3Client
cases := map[string]struct {
s3 s3manager.S3
expectedStatusCode int
expectedBodyContains string
}{
"success": {
s3: &S3ClientMock{},
s3: &s3Mock{},
expectedStatusCode: http.StatusNoContent,
expectedBodyContains: "",
},
"s3 error": {
s3: &S3ClientMock{
s3: &s3Mock{
Err: errors.New("mocked S3 error"),
},
expectedStatusCode: http.StatusInternalServerError,
@ -31,12 +32,12 @@ func TestDeleteBucketHandler(t *testing.T) {
},
}
for tcID, tc := range tests {
for tcID, tc := range cases {
req, err := http.NewRequest(http.MethodDelete, "/api/buckets/bucketName", nil)
assert.NoError(err, tcID)
rr := httptest.NewRecorder()
handler := DeleteBucketHandler(tc.s3)
handler := s3manager.DeleteBucketHandler(tc.s3)
handler.ServeHTTP(rr, req)

6
delete-object.go
View file

@ -1,4 +1,4 @@
package main
package s3manager
import (
"net/http"
@ -6,8 +6,8 @@ import (
"github.com/gorilla/mux"
)
// DeleteObjectHandler deletes an object
func DeleteObjectHandler(s3 S3Client) http.Handler {
// DeleteObjectHandler deletes an object.
func DeleteObjectHandler(s3 S3) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
bucketName := vars["bucketName"]

15
delete-object_test.go
View file

@ -1,4 +1,4 @@
package main
package s3manager_test
import (
"errors"
@ -6,24 +6,25 @@ import (
"net/http/httptest"
"testing"
"github.com/mastertinner/s3manager"
"github.com/stretchr/testify/assert"
)
func TestDeleteObjectHandler(t *testing.T) {
assert := assert.New(t)
tests := map[string]struct {
s3 S3Client
cases := map[string]struct {
s3 s3manager.S3
expectedStatusCode int
expectedBodyContains string
}{
"success": {
s3: &S3ClientMock{},
s3: &s3Mock{},
expectedStatusCode: http.StatusNoContent,
expectedBodyContains: "",
},
"s3 error": {
s3: &S3ClientMock{
s3: &s3Mock{
Err: errors.New("mocked S3 error"),
},
expectedStatusCode: http.StatusInternalServerError,
@ -31,12 +32,12 @@ func TestDeleteObjectHandler(t *testing.T) {
},
}
for tcID, tc := range tests {
for tcID, tc := range cases {
req, err := http.NewRequest(http.MethodDelete, "/api/buckets/bucketName/objects/objectName", nil)
assert.NoError(err, tcID)
rr := httptest.NewRecorder()
handler := DeleteObjectHandler(tc.s3)
handler := s3manager.DeleteObjectHandler(tc.s3)
handler.ServeHTTP(rr, req)

3
docker-compose.yml
View file

@ -1,10 +1,11 @@
version: '2'
services:
s3-manager:
s3manager:
build: .
ports:
- "8080:8080"
environment:
- S3_ENDPOINT=s3.amazonaws.com
- S3_ACCESS_KEY_ID=xxx
- S3_SECRET_ACCESS_KEY=xxx

30
entrypoint-cf.sh Executable file
View file

@ -0,0 +1,30 @@
#!/bin/bash
set -e -u
if [ -z "${PORT}" ]; then
echo "Error: No PORT found" >&2
exit 1
fi
if [ -z "${VCAP_SERVICES}" ]; then
echo "Error: No VCAP_SERVICES found" >&2
exit 1
fi
# S3
s3_credentials="$(echo "${VCAP_SERVICES}" | jq -r '.["dynstrg"][0].credentials // ""')"
if [ -z "${s3_credentials}" ]; then
echo "Error: Please bind an S3 service" >&2
exit 1
fi
s3_endpoint="$(echo "${s3_credentials}" | jq -r '.accessHost // ""')"
s3_access_key_id="$(echo "${s3_credentials}" | jq -r '.accessKey // ""')"
s3_secret_access_key="$(echo "${s3_credentials}" | jq -r '.sharedSecret // ""')"
# Run binary
./s3manager \
-port "${PORT}" \
-endpoint "${s3_endpoint}" \
-access-key-id "${s3_access_key_id}" \
-secret-access-key "${s3_secret_access_key}" \
-v2-signing

6
errors.go
View file

@ -1,17 +1,17 @@
package main
package s3manager
import (
"log"
"net/http"
)
// Common error messages within the app
// Error codes that may be returned from an S3 backend.
const (
ErrBucketDoesNotExist = "The specified bucket does not exist."
ErrKeyDoesNotExist = "The specified key does not exist."
)
// handleHTTPError handles HTTP errors
// handleHTTPError handles HTTP errors.
func handleHTTPError(w http.ResponseWriter, statusCode int, err error) {
msg := http.StatusText(statusCode)
http.Error(w, msg, statusCode)

8
get-object.go
View file

@ -1,4 +1,4 @@
package main
package s3manager
import (
"fmt"
@ -8,8 +8,8 @@ import (
"github.com/gorilla/mux"
)
// GetObjectHandler downloads an object to the client
func GetObjectHandler(s3 S3Client) http.Handler {
// GetObjectHandler downloads an object to the client.
func GetObjectHandler(s3 S3) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
bucketName := vars["bucketName"]
@ -22,7 +22,7 @@ func GetObjectHandler(s3 S3Client) http.Handler {
}
w.Header().Set(headerContentDisposition, fmt.Sprintf("attachment; filename=\"%s\"", objectName))
w.Header().Set(headerContentType, contentTypeOctetStream)
w.Header().Set(HeaderContentType, contentTypeOctetStream)
_, err = io.Copy(w, object)
if err != nil {

13
get-object_test.go
View file

@ -1,4 +1,4 @@
package main
package s3manager_test
import (
"errors"
@ -9,21 +9,22 @@ import (
"testing"
"github.com/gorilla/mux"
"github.com/mastertinner/s3manager"
"github.com/stretchr/testify/assert"
)
func TestGetObjectHandler(t *testing.T) {
assert := assert.New(t)
tests := map[string]struct {
s3 S3Client
cases := map[string]struct {
s3 s3manager.S3
bucketName string
objectName string
expectedStatusCode int
expectedBodyContains string
}{
"s3 error": {
s3: &S3ClientMock{
s3: &s3Mock{
Err: errors.New("mocked S3 error"),
},
bucketName: "testBucket",
@ -33,12 +34,12 @@ func TestGetObjectHandler(t *testing.T) {
},
}
for tcID, tc := range tests {
for tcID, tc := range cases {
r := mux.NewRouter()
r.
Methods(http.MethodGet).
Path("/buckets/{bucketName}/objects/{objectName}").
Handler(GetObjectHandler(tc.s3))
Handler(s3manager.GetObjectHandler(tc.s3))
ts := httptest.NewServer(r)
defer ts.Close()

31
glide.lock generated
View file

@ -1,31 +0,0 @@
hash: 9b88c8ce183463a407bdb87f79b6b857d8343a7bb5ce4723223c539c654d6d6d
updated: 2017-05-03T10:21:06.902434164+02:00
imports:
- name: github.com/gorilla/context
version: 1ea25387ff6f684839d82767c1733ff4d4d15d0a
- name: github.com/gorilla/mux
version: 392c28fe23e1c45ddba891b0320b3b5df220beea
- name: github.com/mastertinner/adapters
version: b1cb3d82590975623f722e92951658939fdfc328
subpackages:
- logging
- name: github.com/minio/minio-go
version: dcaae9ec4d0b0a81d17f22f6d7a186491f6a55ec
subpackages:
- pkg/policy
- pkg/s3signer
- pkg/s3utils
- pkg/set
- name: github.com/stretchr/testify
version: 69483b4bd14f5845b5a1e55bca19e954e827f1d0
subpackages:
- assert
testImports:
- name: github.com/davecgh/go-spew
version: 6d212800a42e8ab5c146b8ace3490ee17e5225f9
subpackages:
- spew
- name: github.com/pmezard/go-difflib
version: d8ed2627bdf02c080bf22230dbb337003b7aba2d
subpackages:
- difflib

13
glide.yaml
View file

@ -1,13 +0,0 @@
package: github.com/mastertinner/s3-manager
import:
- package: github.com/minio/minio-go
version: ^2.0.2
- package: github.com/gorilla/mux
version: ^1.1.0
- package: github.com/stretchr/testify
version: ^1.1.4
subpackages:
- assert
- package: github.com/mastertinner/adapters
subpackages:
- logging

106
main.go
View file

@ -1,106 +0,0 @@
package main
import (
"log"
"net/http"
"os"
"github.com/gorilla/mux"
"github.com/mastertinner/adapters"
"github.com/mastertinner/adapters/logging"
)
const (
tmplDirectory = "templates"
headerContentType = "Content-Type"
headerContentDisposition = "Content-Disposition"
contentTypeJSON = "application/json"
contentTypeMultipartForm = "multipart/form-data"
contentTypeOctetStream = "application/octet-stream"
)
func main() {
s3, err := newMinioClient()
if err != nil {
log.Fatalln("error creating s3 client:", err)
}
logger := log.New(os.Stdout, "", log.Ldate|log.Ltime)
r := mux.NewRouter().StrictSlash(true)
r.
Methods(http.MethodGet).
Path("/").
Handler(adapters.Adapt(
http.RedirectHandler("/buckets", http.StatusPermanentRedirect),
logging.Handler(logger),
))
r.
Methods(http.MethodGet).
Path("/buckets").
Handler(adapters.Adapt(
BucketsViewHandler(s3),
logging.Handler(logger),
))
r.
Methods(http.MethodGet).
Path("/buckets/{bucketName}").
Handler(adapters.Adapt(
BucketViewHandler(s3),
logging.Handler(logger),
))
api := r.PathPrefix("/api").Subrouter().StrictSlash(true)
br := api.PathPrefix("/buckets").Subrouter().StrictSlash(true)
br.
Methods(http.MethodPost).
Path("").
Handler(adapters.Adapt(
CreateBucketHandler(s3),
logging.Handler(logger),
))
br.
Methods(http.MethodDelete).
Path("/{bucketName}").
Handler(adapters.Adapt(
DeleteBucketHandler(s3),
logging.Handler(logger),
))
br.
Methods(http.MethodPost).
Headers(headerContentType, contentTypeJSON).
Path("/{bucketName}/objects").
Handler(adapters.Adapt(
CopyObjectHandler(s3),
logging.Handler(logger),
))
br.
Methods(http.MethodPost).
HeadersRegexp(headerContentType, contentTypeMultipartForm).
Path("/{bucketName}/objects").
Handler(adapters.Adapt(
CreateObjectHandler(s3),
logging.Handler(logger),
))
br.
Methods(http.MethodGet).
Path("/{bucketName}/objects/{objectName}").
Handler(adapters.Adapt(
GetObjectHandler(s3),
logging.Handler(logger),
))
br.
Methods(http.MethodDelete).
Path("/{bucketName}/objects/{objectName}").
Handler(adapters.Adapt(
DeleteObjectHandler(s3),
logging.Handler(logger),
))
port := os.Getenv("PORT")
if len(port) == 0 {
port = "8080"
}
log.Fatal(http.ListenAndServe(":"+port, r))
}

8
manifest.yml
View file

@ -3,8 +3,8 @@ applications:
- name: s3-manager
host: s3-manager
memory: 64M
buildpack: https://github.com/cloudfoundry/go-buildpack.git
buildpack: https://github.com/cloudfoundry/binary-buildpack.git
command: ./entrypoint-cf.sh
env:
S3_ACCESS_KEY_ID: "xxx"
S3_SECRET_ACCESS_KEY: "xxx"
services:
- wp-storage

37
minio.go
View file

@ -1,37 +0,0 @@
package main
import (
"errors"
"os"
"github.com/minio/minio-go"
)
// newMinioClient creates a new Minio client
func newMinioClient() (*minio.Client, error) {
var err error
var c *minio.Client
s3Endpoint := os.Getenv("S3_ENDPOINT")
if s3Endpoint == "" {
s3Endpoint = "s3.amazonaws.com"
}
s3AccessKeyID := os.Getenv("S3_ACCESS_KEY_ID")
if s3AccessKeyID == "" {
return nil, errors.New("no S3_ACCESS_KEY_ID found")
}
s3SecretAccessKey := os.Getenv("S3_SECRET_ACCESS_KEY")
if s3SecretAccessKey == "" {
return nil, errors.New("no S3_SECRET_ACCESS_KEY found")
}
if os.Getenv("V2_SIGNING") == "true" {
c, err = minio.NewV2(s3Endpoint, s3AccessKeyID, s3SecretAccessKey, true)
} else {
c, err = minio.New(s3Endpoint, s3AccessKeyID, s3SecretAccessKey, true)
}
return c, err
}

88
s3-client-mock.go
View file

@ -1,88 +0,0 @@
package main
import (
"errors"
"io"
minio "github.com/minio/minio-go"
)
// S3ClientMock is a mocked S3 client
type S3ClientMock struct {
Buckets []minio.BucketInfo
Objects []minio.ObjectInfo
Err error
}
// CopyObject mocks minio.Client.CopyObject
func (s S3ClientMock) CopyObject(string, string, string, minio.CopyConditions) error {
return s.Err
}
// GetObject mocks minio.Client.GetObject
func (s S3ClientMock) GetObject(bucketName string, objectName string) (*minio.Object, error) {
if s.Err != nil {
return nil, s.Err
}
return &minio.Object{}, nil
}
// ListBuckets mocks minio.Client.ListBuckets
func (s S3ClientMock) ListBuckets() ([]minio.BucketInfo, error) {
return s.Buckets, s.Err
}
// ListObjectsV2 mocks minio.Client.ListObjectsV2
func (s S3ClientMock) ListObjectsV2(name string, p string, r bool, d <-chan struct{}) <-chan minio.ObjectInfo {
// Add error if exists
if s.Err != nil {
s.Objects = append(s.Objects, minio.ObjectInfo{
Err: s.Err,
})
}
// Check if bucket exists
found := false
for _, b := range s.Buckets {
if b.Name == name {
found = true
break
}
}
if !found {
s.Objects = append(s.Objects, minio.ObjectInfo{
Err: errors.New("The specified bucket does not exist."),
})
}
objCh := make(chan minio.ObjectInfo, len(s.Objects))
defer close(objCh)
for _, obj := range s.Objects {
objCh <- obj
}
return objCh
}
// MakeBucket mocks minio.Client.MakeBucket
func (s S3ClientMock) MakeBucket(string, string) error {
return s.Err
}
// PutObject mocks minio.Client.PutObject
func (s S3ClientMock) PutObject(string, string, io.Reader, string) (int64, error) {
return 0, s.Err
}
// RemoveBucket mocks minio.Client.RemoveBucket
func (s S3ClientMock) RemoveBucket(string) error {
return s.Err
}
// RemoveObject mocks minio.Client.RemoveObject
func (s S3ClientMock) RemoveObject(string, string) error {
return s.Err
}

6
s3-client.go → s3.go
View file

@ -1,4 +1,4 @@
package main
package s3manager
import (
"io"
@ -6,8 +6,8 @@ import (
minio "github.com/minio/minio-go"
)
// S3Client is a client to interact with S3 storage
type S3Client interface {
// S3 is a client to interact with S3 storage.
type S3 interface {
CopyObject(string, string, string, minio.CopyConditions) error
GetObject(string, string) (*minio.Object, error)
ListBuckets() ([]minio.BucketInfo, error)

88
s3_test.go Normal file
View file

@ -0,0 +1,88 @@
package s3manager_test
import (
"errors"
"io"
minio "github.com/minio/minio-go"
)
// s3Mock is a mocked S3 client.
type s3Mock struct {
Buckets []minio.BucketInfo
Objects []minio.ObjectInfo
Err error
}
// CopyObject mocks minio.Client.CopyObject.
func (s *s3Mock) CopyObject(string, string, string, minio.CopyConditions) error {
return s.Err
}
// GetObject mocks minio.Client.GetObject.
func (s *s3Mock) GetObject(bucketName string, objectName string) (*minio.Object, error) {
if s.Err != nil {
return nil, s.Err
}
return &minio.Object{}, nil
}
// ListBuckets mocks minio.Client.ListBuckets.
func (s *s3Mock) ListBuckets() ([]minio.BucketInfo, error) {
return s.Buckets, s.Err
}
// ListObjectsV2 mocks minio.Client.ListObjectsV2.
func (s *s3Mock) ListObjectsV2(name string, p string, r bool, d <-chan struct{}) <-chan minio.ObjectInfo {
// Add error if exists
if s.Err != nil {
s.Objects = append(s.Objects, minio.ObjectInfo{
Err: s.Err,
})
}
// Check if bucket exists
found := false
for _, b := range s.Buckets {
if b.Name == name {
found = true
break
}
}
if !found {
s.Objects = append(s.Objects, minio.ObjectInfo{
Err: errors.New("The specified bucket does not exist."),
})
}
objCh := make(chan minio.ObjectInfo, len(s.Objects))
defer close(objCh)
for _, obj := range s.Objects {
objCh <- obj
}
return objCh
}
// MakeBucket mocks minio.Client.MakeBucket.
func (s *s3Mock) MakeBucket(string, string) error {
return s.Err
}
// PutObject mocks minio.Client.PutObject.
func (s *s3Mock) PutObject(string, string, io.Reader, string) (int64, error) {
return 0, s.Err
}
// RemoveBucket mocks minio.Client.RemoveBucket.
func (s *s3Mock) RemoveBucket(string) error {
return s.Err
}
// RemoveObject mocks minio.Client.RemoveObject.
func (s *s3Mock) RemoveObject(string, string) error {
return s.Err
}

12
s3manager.go Normal file
View file

@ -0,0 +1,12 @@
// Package s3manager allows to interact with an S3 compatible storage.
package s3manager
// Constants commonly used throughout the application.
const (
HeaderContentType = "Content-Type"
ContentTypeJSON = "application/json"
ContentTypeMultipartForm = "multipart/form-data"
tmplDirectory = "templates"
headerContentDisposition = "Content-Disposition"
contentTypeOctetStream = "application/octet-stream"
)

17
templates/bucket.html.tmpl
View file

@ -65,12 +65,13 @@
</div>
<div id="modal-create-object" class="modal">
<form action="/api/buckets/{{ .BucketName }}/objects" method="POST" id="create-object-form" enctype="multipart/form-data">
<div class="modal-content">
<h4>Create Object</h4>
<br>
<div class="row">
<div class="col s6">
<form action="/api/buckets/{{ .BucketName }}/objects" method="POST" id="create-object-form" enctype="multipart/form-data">
<div class="file-field input-field">
<div class="btn">
<span>File</span>
@ -80,30 +81,32 @@
<input class="file-path validate" type="text">
</div>
</div>
</form>
</div>
</div>
</div>
<div class="modal-footer">
<button type="submit" form="create-object-form" class="modal-action modal-close waves-effect waves-green btn-flat">Upload</button>
<button type="submit" class="modal-action modal-close waves-effect waves-green btn-flat">Upload</button>
<button class="modal-action modal-close waves-effect waves-green btn-flat">Cancel</button>
</div>
</form>
</div>
<script>
function deleteObject(bucketName, objectName) {
function deleteObject(bucketName, objectName) {
$.ajax({
type: 'DELETE',
url: '/api/buckets/' + bucketName + '/objects/' + objectName,
success: function () { location.reload(); }
})
}
function deleteBucket(bucketName) {
}
function deleteBucket(bucketName) {
$.ajax({
type: 'DELETE',
url: '/api/buckets/' + bucketName,
success: function () { window.location.replace('/buckets'); }
})
}
}
</script>
{{ end }}

11
templates/buckets.html.tmpl
View file

@ -48,28 +48,31 @@
</div>
<div id="modal-create-bucket" class="modal">
<form id="create-bucket-form">
<div class="modal-content">
<h4>Create Bucket</h4>
<br>
<div class="row">
<div class="col s6">
<form id="create-bucket-form">
<div class="input-field">
<input placeholder="My Bucket" id="name" type="text" name="name">
<label for="name">Name</label>
</div>
</form>
</div>
</div>
</div>
<div class="modal-footer">
<button type="button" onclick="createBucket()" class="modal-action modal-close waves-effect waves-green btn-flat">Create</button>
<button class="modal-action modal-close waves-effect waves-green btn-flat">Cancel</button>
</div>
</form>
</div>
<script>
function createBucket() {
function createBucket() {
var formData = {};
$.each($('#create-bucket-form')
.serializeArray(), function(i, field) {
@ -83,6 +86,6 @@
contentType: 'application/json',
success: function() { location.reload(); }
});
}
}
</script>
{{ end }}

4
templates/layout.html.tmpl
View file

@ -4,8 +4,8 @@
<head>
<meta charset="UTF-8">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1.0"/>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>S3 Manager</title>

22
vendor/github.com/davecgh/go-spew/.gitignore generated vendored Normal file
View file

@ -0,0 +1,22 @@
# Compiled Object files, Static and Dynamic libs (Shared Objects)
*.o
*.a
*.so
# Folders
_obj
_test
# Architecture specific extensions/prefixes
*.[568vq]
[568vq].out
*.cgo1.go
*.cgo2.c
_cgo_defun.c
_cgo_gotypes.go
_cgo_export.*
_testmain.go
*.exe

14
vendor/github.com/davecgh/go-spew/.travis.yml generated vendored Normal file
View file

@ -0,0 +1,14 @@
language: go
go:
- 1.5.4
- 1.6.3
- 1.7
install:
- go get -v golang.org/x/tools/cmd/cover
script:
- go test -v -tags=safe ./spew
- go test -v -tags=testcgo ./spew -covermode=count -coverprofile=profile.cov
after_success:
- go get -v github.com/mattn/goveralls
- export PATH=$PATH:$HOME/gopath/bin
- goveralls -coverprofile=profile.cov -service=travis-ci

15
vendor/github.com/davecgh/go-spew/LICENSE generated vendored Normal file
View file

@ -0,0 +1,15 @@
ISC License
Copyright (c) 2012-2016 Dave Collins <dave@davec.name>
Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

205
vendor/github.com/davecgh/go-spew/README.md generated vendored Normal file
View file

@ -0,0 +1,205 @@
go-spew
=======
[![Build Status](https://img.shields.io/travis/davecgh/go-spew.svg)]
(https://travis-ci.org/davecgh/go-spew) [![ISC License]
(http://img.shields.io/badge/license-ISC-blue.svg)](http://copyfree.org) [![Coverage Status]
(https://img.shields.io/coveralls/davecgh/go-spew.svg)]
(https://coveralls.io/r/davecgh/go-spew?branch=master)
Go-spew implements a deep pretty printer for Go data structures to aid in
debugging. A comprehensive suite of tests with 100% test coverage is provided
to ensure proper functionality. See `test_coverage.txt` for the gocov coverage
report. Go-spew is licensed under the liberal ISC license, so it may be used in
open source or commercial projects.
If you're interested in reading about how this package came to life and some
of the challenges involved in providing a deep pretty printer, there is a blog
post about it
[here](https://web.archive.org/web/20160304013555/https://blog.cyphertite.com/go-spew-a-journey-into-dumping-go-data-structures/).
## Documentation
[![GoDoc](https://img.shields.io/badge/godoc-reference-blue.svg)]
(http://godoc.org/github.com/davecgh/go-spew/spew)
Full `go doc` style documentation for the project can be viewed online without
installing this package by using the excellent GoDoc site here:
http://godoc.org/github.com/davecgh/go-spew/spew
You can also view the documentation locally once the package is installed with
the `godoc` tool by running `godoc -http=":6060"` and pointing your browser to
http://localhost:6060/pkg/github.com/davecgh/go-spew/spew
## Installation
```bash
$ go get -u github.com/davecgh/go-spew/spew
```
## Quick Start
Add this import line to the file you're working in:
```Go
import "github.com/davecgh/go-spew/spew"
```
To dump a variable with full newlines, indentation, type, and pointer
information use Dump, Fdump, or Sdump:
```Go
spew.Dump(myVar1, myVar2, ...)
spew.Fdump(someWriter, myVar1, myVar2, ...)
str := spew.Sdump(myVar1, myVar2, ...)
```
Alternatively, if you would prefer to use format strings with a compacted inline
printing style, use the convenience wrappers Printf, Fprintf, etc with %v (most
compact), %+v (adds pointer addresses), %#v (adds types), or %#+v (adds types
and pointer addresses):
```Go
spew.Printf("myVar1: %v -- myVar2: %+v", myVar1, myVar2)
spew.Printf("myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
spew.Fprintf(someWriter, "myVar1: %v -- myVar2: %+v", myVar1, myVar2)
spew.Fprintf(someWriter, "myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
```
## Debugging a Web Application Example
Here is an example of how you can use `spew.Sdump()` to help debug a web application. Please be sure to wrap your output using the `html.EscapeString()` function for safety reasons. You should also only use this debugging technique in a development environment, never in production.
```Go
package main
import (
"fmt"
"html"
"net/http"
"github.com/davecgh/go-spew/spew"
)
func handler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/html")
fmt.Fprintf(w, "Hi there, %s!", r.URL.Path[1:])
fmt.Fprintf(w, "<!--\n" + html.EscapeString(spew.Sdump(w)) + "\n-->")
}
func main() {
http.HandleFunc("/", handler)
http.ListenAndServe(":8080", nil)
}
```
## Sample Dump Output
```
(main.Foo) {
unexportedField: (*main.Bar)(0xf84002e210)({
flag: (main.Flag) flagTwo,
data: (uintptr) <nil>
}),
ExportedField: (map[interface {}]interface {}) {
(string) "one": (bool) true
}
}
([]uint8) {
00000000 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 |............... |
00000010 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30 |!"#$%&'()*+,-./0|
00000020 31 32 |12|
}
```
## Sample Formatter Output
Double pointer to a uint8:
```
%v: <**>5
%+v: <**>(0xf8400420d0->0xf8400420c8)5
%#v: (**uint8)5
%#+v: (**uint8)(0xf8400420d0->0xf8400420c8)5
```
Pointer to circular struct with a uint8 field and a pointer to itself:
```
%v: <*>{1 <*><shown>}
%+v: <*>(0xf84003e260){ui8:1 c:<*>(0xf84003e260)<shown>}
%#v: (*main.circular){ui8:(uint8)1 c:(*main.circular)<shown>}
%#+v: (*main.circular)(0xf84003e260){ui8:(uint8)1 c:(*main.circular)(0xf84003e260)<shown>}
```
## Configuration Options
Configuration of spew is handled by fields in the ConfigState type. For
convenience, all of the top-level functions use a global state available via the
spew.Config global.
It is also possible to create a ConfigState instance that provides methods
equivalent to the top-level functions. This allows concurrent configuration
options. See the ConfigState documentation for more details.
```
* Indent
String to use for each indentation level for Dump functions.
It is a single space by default. A popular alternative is "\t".
* MaxDepth
Maximum number of levels to descend into nested data structures.
There is no limit by default.
* DisableMethods
Disables invocation of error and Stringer interface methods.
Method invocation is enabled by default.
* DisablePointerMethods
Disables invocation of error and Stringer interface methods on types
which only accept pointer receivers from non-pointer variables. This option
relies on access to the unsafe package, so it will not have any effect when
running in environments without access to the unsafe package such as Google
App Engine or with the "safe" build tag specified.
Pointer method invocation is enabled by default.
* DisablePointerAddresses
DisablePointerAddresses specifies whether to disable the printing of
pointer addresses. This is useful when diffing data structures in tests.
* DisableCapacities
DisableCapacities specifies whether to disable the printing of capacities
for arrays, slices, maps and channels. This is useful when diffing data
structures in tests.
* ContinueOnMethod
Enables recursion into types after invoking error and Stringer interface
methods. Recursion after method invocation is disabled by default.
* SortKeys
Specifies map keys should be sorted before being printed. Use
this to have a more deterministic, diffable output. Note that
only native types (bool, int, uint, floats, uintptr and string)
and types which implement error or Stringer interfaces are supported,
with other types sorted according to the reflect.Value.String() output
which guarantees display stability. Natural map order is used by
default.
* SpewKeys
SpewKeys specifies that, as a last resort attempt, map keys should be
spewed to strings and sorted by those strings. This is only considered
if SortKeys is true.
```
## Unsafe Package Dependency
This package relies on the unsafe package to perform some of the more advanced
features, however it also supports a "limited" mode which allows it to work in
environments where the unsafe package is not available. By default, it will
operate in this mode on Google App Engine and when compiled with GopherJS. The
"safe" build tag may also be specified to force the package to build without
using the unsafe package.
## License
Go-spew is licensed under the [copyfree](http://copyfree.org) ISC License.

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#!/bin/sh
# This script uses gocov to generate a test coverage report.
# The gocov tool my be obtained with the following command:
# go get github.com/axw/gocov/gocov
#
# It will be installed to $GOPATH/bin, so ensure that location is in your $PATH.
# Check for gocov.
if ! type gocov >/dev/null 2>&1; then
echo >&2 "This script requires the gocov tool."
echo >&2 "You may obtain it with the following command:"
echo >&2 "go get github.com/axw/gocov/gocov"
exit 1
fi
# Only run the cgo tests if gcc is installed.
if type gcc >/dev/null 2>&1; then
(cd spew && gocov test -tags testcgo | gocov report)
else
(cd spew && gocov test | gocov report)
fi

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// Copyright (c) 2015-2016 Dave Collins <dave@davec.name>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
// NOTE: Due to the following build constraints, this file will only be compiled
// when the code is not running on Google App Engine, compiled by GopherJS, and
// "-tags safe" is not added to the go build command line. The "disableunsafe"
// tag is deprecated and thus should not be used.
// +build !js,!appengine,!safe,!disableunsafe
package spew
import (
"reflect"
"unsafe"
)
const (
// UnsafeDisabled is a build-time constant which specifies whether or
// not access to the unsafe package is available.
UnsafeDisabled = false
// ptrSize is the size of a pointer on the current arch.
ptrSize = unsafe.Sizeof((*byte)(nil))
)
var (
// offsetPtr, offsetScalar, and offsetFlag are the offsets for the
// internal reflect.Value fields. These values are valid before golang
// commit ecccf07e7f9d which changed the format. The are also valid
// after commit 82f48826c6c7 which changed the format again to mirror
// the original format. Code in the init function updates these offsets
// as necessary.
offsetPtr = uintptr(ptrSize)
offsetScalar = uintptr(0)
offsetFlag = uintptr(ptrSize * 2)
// flagKindWidth and flagKindShift indicate various bits that the
// reflect package uses internally to track kind information.
//
// flagRO indicates whether or not the value field of a reflect.Value is
// read-only.
//
// flagIndir indicates whether the value field of a reflect.Value is
// the actual data or a pointer to the data.
//
// These values are valid before golang commit 90a7c3c86944 which
// changed their positions. Code in the init function updates these
// flags as necessary.
flagKindWidth = uintptr(5)
flagKindShift = uintptr(flagKindWidth - 1)
flagRO = uintptr(1 << 0)
flagIndir = uintptr(1 << 1)
)
func init() {
// Older versions of reflect.Value stored small integers directly in the
// ptr field (which is named val in the older versions). Versions
// between commits ecccf07e7f9d and 82f48826c6c7 added a new field named
// scalar for this purpose which unfortunately came before the flag
// field, so the offset of the flag field is different for those
// versions.
//
// This code constructs a new reflect.Value from a known small integer
// and checks if the size of the reflect.Value struct indicates it has
// the scalar field. When it does, the offsets are updated accordingly.
vv := reflect.ValueOf(0xf00)
if unsafe.Sizeof(vv) == (ptrSize * 4) {
offsetScalar = ptrSize * 2
offsetFlag = ptrSize * 3
}
// Commit 90a7c3c86944 changed the flag positions such that the low
// order bits are the kind. This code extracts the kind from the flags
// field and ensures it's the correct type. When it's not, the flag
// order has been changed to the newer format, so the flags are updated
// accordingly.
upf := unsafe.Pointer(uintptr(unsafe.Pointer(&vv)) + offsetFlag)
upfv := *(*uintptr)(upf)
flagKindMask := uintptr((1<<flagKindWidth - 1) << flagKindShift)
if (upfv&flagKindMask)>>flagKindShift != uintptr(reflect.Int) {
flagKindShift = 0
flagRO = 1 << 5
flagIndir = 1 << 6
// Commit adf9b30e5594 modified the flags to separate the
// flagRO flag into two bits which specifies whether or not the
// field is embedded. This causes flagIndir to move over a bit
// and means that flagRO is the combination of either of the
// original flagRO bit and the new bit.
//
// This code detects the change by extracting what used to be
// the indirect bit to ensure it's set. When it's not, the flag
// order has been changed to the newer format, so the flags are
// updated accordingly.
if upfv&flagIndir == 0 {
flagRO = 3 << 5
flagIndir = 1 << 7
}
}
}
// unsafeReflectValue converts the passed reflect.Value into a one that bypasses
// the typical safety restrictions preventing access to unaddressable and
// unexported data. It works by digging the raw pointer to the underlying
// value out of the protected value and generating a new unprotected (unsafe)
// reflect.Value to it.
//
// This allows us to check for implementations of the Stringer and error
// interfaces to be used for pretty printing ordinarily unaddressable and
// inaccessible values such as unexported struct fields.
func unsafeReflectValue(v reflect.Value) (rv reflect.Value) {
indirects := 1
vt := v.Type()
upv := unsafe.Pointer(uintptr(unsafe.Pointer(&v)) + offsetPtr)
rvf := *(*uintptr)(unsafe.Pointer(uintptr(unsafe.Pointer(&v)) + offsetFlag))
if rvf&flagIndir != 0 {
vt = reflect.PtrTo(v.Type())
indirects++
} else if offsetScalar != 0 {
// The value is in the scalar field when it's not one of the
// reference types.
switch vt.Kind() {
case reflect.Uintptr:
case reflect.Chan:
case reflect.Func:
case reflect.Map:
case reflect.Ptr:
case reflect.UnsafePointer:
default:
upv = unsafe.Pointer(uintptr(unsafe.Pointer(&v)) +
offsetScalar)
}
}
pv := reflect.NewAt(vt, upv)
rv = pv
for i := 0; i < indirects; i++ {
rv = rv.Elem()
}
return rv
}

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// Copyright (c) 2015-2016 Dave Collins <dave@davec.name>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
// NOTE: Due to the following build constraints, this file will only be compiled
// when the code is running on Google App Engine, compiled by GopherJS, or
// "-tags safe" is added to the go build command line. The "disableunsafe"
// tag is deprecated and thus should not be used.
// +build js appengine safe disableunsafe
package spew
import "reflect"
const (
// UnsafeDisabled is a build-time constant which specifies whether or
// not access to the unsafe package is available.
UnsafeDisabled = true
)
// unsafeReflectValue typically converts the passed reflect.Value into a one
// that bypasses the typical safety restrictions preventing access to
// unaddressable and unexported data. However, doing this relies on access to
// the unsafe package. This is a stub version which simply returns the passed
// reflect.Value when the unsafe package is not available.
func unsafeReflectValue(v reflect.Value) reflect.Value {
return v
}

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package spew
import (
"bytes"
"fmt"
"io"
"reflect"
"sort"
"strconv"
)
// Some constants in the form of bytes to avoid string overhead. This mirrors
// the technique used in the fmt package.
var (
panicBytes = []byte("(PANIC=")
plusBytes = []byte("+")
iBytes = []byte("i")
trueBytes = []byte("true")
falseBytes = []byte("false")
interfaceBytes = []byte("(interface {})")
commaNewlineBytes = []byte(",\n")
newlineBytes = []byte("\n")
openBraceBytes = []byte("{")
openBraceNewlineBytes = []byte("{\n")
closeBraceBytes = []byte("}")
asteriskBytes = []byte("*")
colonBytes = []byte(":")
colonSpaceBytes = []byte(": ")
openParenBytes = []byte("(")
closeParenBytes = []byte(")")
spaceBytes = []byte(" ")
pointerChainBytes = []byte("->")
nilAngleBytes = []byte("<nil>")
maxNewlineBytes = []byte("<max depth reached>\n")
maxShortBytes = []byte("<max>")
circularBytes = []byte("<already shown>")
circularShortBytes = []byte("<shown>")
invalidAngleBytes = []byte("<invalid>")
openBracketBytes = []byte("[")
closeBracketBytes = []byte("]")
percentBytes = []byte("%")
precisionBytes = []byte(".")
openAngleBytes = []byte("<")
closeAngleBytes = []byte(">")
openMapBytes = []byte("map[")
closeMapBytes = []byte("]")
lenEqualsBytes = []byte("len=")
capEqualsBytes = []byte("cap=")
)
// hexDigits is used to map a decimal value to a hex digit.
var hexDigits = "0123456789abcdef"
// catchPanic handles any panics that might occur during the handleMethods
// calls.
func catchPanic(w io.Writer, v reflect.Value) {
if err := recover(); err != nil {
w.Write(panicBytes)
fmt.Fprintf(w, "%v", err)
w.Write(closeParenBytes)
}
}
// handleMethods attempts to call the Error and String methods on the underlying
// type the passed reflect.Value represents and outputes the result to Writer w.
//
// It handles panics in any called methods by catching and displaying the error
// as the formatted value.
func handleMethods(cs *ConfigState, w io.Writer, v reflect.Value) (handled bool) {
// We need an interface to check if the type implements the error or
// Stringer interface. However, the reflect package won't give us an
// interface on certain things like unexported struct fields in order
// to enforce visibility rules. We use unsafe, when it's available,
// to bypass these restrictions since this package does not mutate the
// values.
if !v.CanInterface() {
if UnsafeDisabled {
return false
}
v = unsafeReflectValue(v)
}
// Choose whether or not to do error and Stringer interface lookups against
// the base type or a pointer to the base type depending on settings.
// Technically calling one of these methods with a pointer receiver can
// mutate the value, however, types which choose to satisify an error or
// Stringer interface with a pointer receiver should not be mutating their
// state inside these interface methods.
if !cs.DisablePointerMethods && !UnsafeDisabled && !v.CanAddr() {
v = unsafeReflectValue(v)
}
if v.CanAddr() {
v = v.Addr()
}
// Is it an error or Stringer?
switch iface := v.Interface().(type) {
case error:
defer catchPanic(w, v)
if cs.ContinueOnMethod {
w.Write(openParenBytes)
w.Write([]byte(iface.Error()))
w.Write(closeParenBytes)
w.Write(spaceBytes)
return false
}
w.Write([]byte(iface.Error()))
return true
case fmt.Stringer:
defer catchPanic(w, v)
if cs.ContinueOnMethod {
w.Write(openParenBytes)
w.Write([]byte(iface.String()))
w.Write(closeParenBytes)
w.Write(spaceBytes)
return false
}
w.Write([]byte(iface.String()))
return true
}
return false
}
// printBool outputs a boolean value as true or false to Writer w.
func printBool(w io.Writer, val bool) {
if val {
w.Write(trueBytes)
} else {
w.Write(falseBytes)
}
}
// printInt outputs a signed integer value to Writer w.
func printInt(w io.Writer, val int64, base int) {
w.Write([]byte(strconv.FormatInt(val, base)))
}
// printUint outputs an unsigned integer value to Writer w.
func printUint(w io.Writer, val uint64, base int) {
w.Write([]byte(strconv.FormatUint(val, base)))
}
// printFloat outputs a floating point value using the specified precision,
// which is expected to be 32 or 64bit, to Writer w.
func printFloat(w io.Writer, val float64, precision int) {
w.Write([]byte(strconv.FormatFloat(val, 'g', -1, precision)))
}
// printComplex outputs a complex value using the specified float precision
// for the real and imaginary parts to Writer w.
func printComplex(w io.Writer, c complex128, floatPrecision int) {
r := real(c)
w.Write(openParenBytes)
w.Write([]byte(strconv.FormatFloat(r, 'g', -1, floatPrecision)))
i := imag(c)
if i >= 0 {
w.Write(plusBytes)
}
w.Write([]byte(strconv.FormatFloat(i, 'g', -1, floatPrecision)))
w.Write(iBytes)
w.Write(closeParenBytes)
}
// printHexPtr outputs a uintptr formatted as hexidecimal with a leading '0x'
// prefix to Writer w.
func printHexPtr(w io.Writer, p uintptr) {
// Null pointer.
num := uint64(p)
if num == 0 {
w.Write(nilAngleBytes)
return
}
// Max uint64 is 16 bytes in hex + 2 bytes for '0x' prefix
buf := make([]byte, 18)
// It's simpler to construct the hex string right to left.
base := uint64(16)
i := len(buf) - 1
for num >= base {
buf[i] = hexDigits[num%base]
num /= base
i--
}
buf[i] = hexDigits[num]
// Add '0x' prefix.
i--
buf[i] = 'x'
i--
buf[i] = '0'
// Strip unused leading bytes.
buf = buf[i:]
w.Write(buf)
}
// valuesSorter implements sort.Interface to allow a slice of reflect.Value
// elements to be sorted.
type valuesSorter struct {
values []reflect.Value
strings []string // either nil or same len and values
cs *ConfigState
}
// newValuesSorter initializes a valuesSorter instance, which holds a set of
// surrogate keys on which the data should be sorted. It uses flags in
// ConfigState to decide if and how to populate those surrogate keys.
func newValuesSorter(values []reflect.Value, cs *ConfigState) sort.Interface {
vs := &valuesSorter{values: values, cs: cs}
if canSortSimply(vs.values[0].Kind()) {
return vs
}
if !cs.DisableMethods {
vs.strings = make([]string, len(values))
for i := range vs.values {
b := bytes.Buffer{}
if !handleMethods(cs, &b, vs.values[i]) {
vs.strings = nil
break
}
vs.strings[i] = b.String()
}
}
if vs.strings == nil && cs.SpewKeys {
vs.strings = make([]string, len(values))
for i := range vs.values {
vs.strings[i] = Sprintf("%#v", vs.values[i].Interface())
}
}
return vs
}
// canSortSimply tests whether a reflect.Kind is a primitive that can be sorted
// directly, or whether it should be considered for sorting by surrogate keys
// (if the ConfigState allows it).
func canSortSimply(kind reflect.Kind) bool {
// This switch parallels valueSortLess, except for the default case.
switch kind {
case reflect.Bool:
return true
case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
return true
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
return true
case reflect.Float32, reflect.Float64:
return true
case reflect.String:
return true
case reflect.Uintptr:
return true
case reflect.Array:
return true
}
return false
}
// Len returns the number of values in the slice. It is part of the
// sort.Interface implementation.
func (s *valuesSorter) Len() int {
return len(s.values)
}
// Swap swaps the values at the passed indices. It is part of the
// sort.Interface implementation.
func (s *valuesSorter) Swap(i, j int) {
s.values[i], s.values[j] = s.values[j], s.values[i]
if s.strings != nil {
s.strings[i], s.strings[j] = s.strings[j], s.strings[i]
}
}
// valueSortLess returns whether the first value should sort before the second
// value. It is used by valueSorter.Less as part of the sort.Interface
// implementation.
func valueSortLess(a, b reflect.Value) bool {
switch a.Kind() {
case reflect.Bool:
return !a.Bool() && b.Bool()
case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
return a.Int() < b.Int()
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
return a.Uint() < b.Uint()
case reflect.Float32, reflect.Float64:
return a.Float() < b.Float()
case reflect.String:
return a.String() < b.String()
case reflect.Uintptr:
return a.Uint() < b.Uint()
case reflect.Array:
// Compare the contents of both arrays.
l := a.Len()
for i := 0; i < l; i++ {
av := a.Index(i)
bv := b.Index(i)
if av.Interface() == bv.Interface() {
continue
}
return valueSortLess(av, bv)
}
}
return a.String() < b.String()
}
// Less returns whether the value at index i should sort before the
// value at index j. It is part of the sort.Interface implementation.
func (s *valuesSorter) Less(i, j int) bool {
if s.strings == nil {
return valueSortLess(s.values[i], s.values[j])
}
return s.strings[i] < s.strings[j]
}
// sortValues is a sort function that handles both native types and any type that
// can be converted to error or Stringer. Other inputs are sorted according to
// their Value.String() value to ensure display stability.
func sortValues(values []reflect.Value, cs *ConfigState) {
if len(values) == 0 {
return
}
sort.Sort(newValuesSorter(values, cs))
}

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package spew_test
import (
"fmt"
"reflect"
"testing"
"github.com/davecgh/go-spew/spew"
)
// custom type to test Stinger interface on non-pointer receiver.
type stringer string
// String implements the Stringer interface for testing invocation of custom
// stringers on types with non-pointer receivers.
func (s stringer) String() string {
return "stringer " + string(s)
}
// custom type to test Stinger interface on pointer receiver.
type pstringer string
// String implements the Stringer interface for testing invocation of custom
// stringers on types with only pointer receivers.
func (s *pstringer) String() string {
return "stringer " + string(*s)
}
// xref1 and xref2 are cross referencing structs for testing circular reference
// detection.
type xref1 struct {
ps2 *xref2
}
type xref2 struct {
ps1 *xref1
}
// indirCir1, indirCir2, and indirCir3 are used to generate an indirect circular
// reference for testing detection.
type indirCir1 struct {
ps2 *indirCir2
}
type indirCir2 struct {
ps3 *indirCir3
}
type indirCir3 struct {
ps1 *indirCir1
}
// embed is used to test embedded structures.
type embed struct {
a string
}
// embedwrap is used to test embedded structures.
type embedwrap struct {
*embed
e *embed
}
// panicer is used to intentionally cause a panic for testing spew properly
// handles them
type panicer int
func (p panicer) String() string {
panic("test panic")
}
// customError is used to test custom error interface invocation.
type customError int
func (e customError) Error() string {
return fmt.Sprintf("error: %d", int(e))
}
// stringizeWants converts a slice of wanted test output into a format suitable
// for a test error message.
func stringizeWants(wants []string) string {
s := ""
for i, want := range wants {
if i > 0 {
s += fmt.Sprintf("want%d: %s", i+1, want)
} else {
s += "want: " + want
}
}
return s
}
// testFailed returns whether or not a test failed by checking if the result
// of the test is in the slice of wanted strings.
func testFailed(result string, wants []string) bool {
for _, want := range wants {
if result == want {
return false
}
}
return true
}
type sortableStruct struct {
x int
}
func (ss sortableStruct) String() string {
return fmt.Sprintf("ss.%d", ss.x)
}
type unsortableStruct struct {
x int
}
type sortTestCase struct {
input []reflect.Value
expected []reflect.Value
}
func helpTestSortValues(tests []sortTestCase, cs *spew.ConfigState, t *testing.T) {
getInterfaces := func(values []reflect.Value) []interface{} {
interfaces := []interface{}{}
for _, v := range values {
interfaces = append(interfaces, v.Interface())
}
return interfaces
}
for _, test := range tests {
spew.SortValues(test.input, cs)
// reflect.DeepEqual cannot really make sense of reflect.Value,
// probably because of all the pointer tricks. For instance,
// v(2.0) != v(2.0) on a 32-bits system. Turn them into interface{}
// instead.
input := getInterfaces(test.input)
expected := getInterfaces(test.expected)
if !reflect.DeepEqual(input, expected) {
t.Errorf("Sort mismatch:\n %v != %v", input, expected)
}
}
}
// TestSortValues ensures the sort functionality for relect.Value based sorting
// works as intended.
func TestSortValues(t *testing.T) {
v := reflect.ValueOf
a := v("a")
b := v("b")
c := v("c")
embedA := v(embed{"a"})
embedB := v(embed{"b"})
embedC := v(embed{"c"})
tests := []sortTestCase{
// No values.
{
[]reflect.Value{},
[]reflect.Value{},
},
// Bools.
{
[]reflect.Value{v(false), v(true), v(false)},
[]reflect.Value{v(false), v(false), v(true)},
},
// Ints.
{
[]reflect.Value{v(2), v(1), v(3)},
[]reflect.Value{v(1), v(2), v(3)},
},
// Uints.
{
[]reflect.Value{v(uint8(2)), v(uint8(1)), v(uint8(3))},
[]reflect.Value{v(uint8(1)), v(uint8(2)), v(uint8(3))},
},
// Floats.
{
[]reflect.Value{v(2.0), v(1.0), v(3.0)},
[]reflect.Value{v(1.0), v(2.0), v(3.0)},
},
// Strings.
{
[]reflect.Value{b, a, c},
[]reflect.Value{a, b, c},
},
// Array
{
[]reflect.Value{v([3]int{3, 2, 1}), v([3]int{1, 3, 2}), v([3]int{1, 2, 3})},
[]reflect.Value{v([3]int{1, 2, 3}), v([3]int{1, 3, 2}), v([3]int{3, 2, 1})},
},
// Uintptrs.
{
[]reflect.Value{v(uintptr(2)), v(uintptr(1)), v(uintptr(3))},
[]reflect.Value{v(uintptr(1)), v(uintptr(2)), v(uintptr(3))},
},
// SortableStructs.
{
// Note: not sorted - DisableMethods is set.
[]reflect.Value{v(sortableStruct{2}), v(sortableStruct{1}), v(sortableStruct{3})},
[]reflect.Value{v(sortableStruct{2}), v(sortableStruct{1}), v(sortableStruct{3})},
},
// UnsortableStructs.
{
// Note: not sorted - SpewKeys is false.
[]reflect.Value{v(unsortableStruct{2}), v(unsortableStruct{1}), v(unsortableStruct{3})},
[]reflect.Value{v(unsortableStruct{2}), v(unsortableStruct{1}), v(unsortableStruct{3})},
},
// Invalid.
{
[]reflect.Value{embedB, embedA, embedC},
[]reflect.Value{embedB, embedA, embedC},
},
}
cs := spew.ConfigState{DisableMethods: true, SpewKeys: false}
helpTestSortValues(tests, &cs, t)
}
// TestSortValuesWithMethods ensures the sort functionality for relect.Value
// based sorting works as intended when using string methods.
func TestSortValuesWithMethods(t *testing.T) {
v := reflect.ValueOf
a := v("a")
b := v("b")
c := v("c")
tests := []sortTestCase{
// Ints.
{
[]reflect.Value{v(2), v(1), v(3)},
[]reflect.Value{v(1), v(2), v(3)},
},
// Strings.
{
[]reflect.Value{b, a, c},
[]reflect.Value{a, b, c},
},
// SortableStructs.
{
[]reflect.Value{v(sortableStruct{2}), v(sortableStruct{1}), v(sortableStruct{3})},
[]reflect.Value{v(sortableStruct{1}), v(sortableStruct{2}), v(sortableStruct{3})},
},
// UnsortableStructs.
{
// Note: not sorted - SpewKeys is false.
[]reflect.Value{v(unsortableStruct{2}), v(unsortableStruct{1}), v(unsortableStruct{3})},
[]reflect.Value{v(unsortableStruct{2}), v(unsortableStruct{1}), v(unsortableStruct{3})},
},
}
cs := spew.ConfigState{DisableMethods: false, SpewKeys: false}
helpTestSortValues(tests, &cs, t)
}
// TestSortValuesWithSpew ensures the sort functionality for relect.Value
// based sorting works as intended when using spew to stringify keys.
func TestSortValuesWithSpew(t *testing.T) {
v := reflect.ValueOf
a := v("a")
b := v("b")
c := v("c")
tests := []sortTestCase{
// Ints.
{
[]reflect.Value{v(2), v(1), v(3)},
[]reflect.Value{v(1), v(2), v(3)},
},
// Strings.
{
[]reflect.Value{b, a, c},
[]reflect.Value{a, b, c},
},
// SortableStructs.
{
[]reflect.Value{v(sortableStruct{2}), v(sortableStruct{1}), v(sortableStruct{3})},
[]reflect.Value{v(sortableStruct{1}), v(sortableStruct{2}), v(sortableStruct{3})},
},
// UnsortableStructs.
{
[]reflect.Value{v(unsortableStruct{2}), v(unsortableStruct{1}), v(unsortableStruct{3})},
[]reflect.Value{v(unsortableStruct{1}), v(unsortableStruct{2}), v(unsortableStruct{3})},
},
}
cs := spew.ConfigState{DisableMethods: true, SpewKeys: true}
helpTestSortValues(tests, &cs, t)
}

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package spew
import (
"bytes"
"fmt"
"io"
"os"
)
// ConfigState houses the configuration options used by spew to format and
// display values. There is a global instance, Config, that is used to control
// all top-level Formatter and Dump functionality. Each ConfigState instance
// provides methods equivalent to the top-level functions.
//
// The zero value for ConfigState provides no indentation. You would typically
// want to set it to a space or a tab.
//
// Alternatively, you can use NewDefaultConfig to get a ConfigState instance
// with default settings. See the documentation of NewDefaultConfig for default
// values.
type ConfigState struct {
// Indent specifies the string to use for each indentation level. The
// global config instance that all top-level functions use set this to a
// single space by default. If you would like more indentation, you might
// set this to a tab with "\t" or perhaps two spaces with " ".
Indent string
// MaxDepth controls the maximum number of levels to descend into nested
// data structures. The default, 0, means there is no limit.
//
// NOTE: Circular data structures are properly detected, so it is not
// necessary to set this value unless you specifically want to limit deeply
// nested data structures.
MaxDepth int
// DisableMethods specifies whether or not error and Stringer interfaces are
// invoked for types that implement them.
DisableMethods bool
// DisablePointerMethods specifies whether or not to check for and invoke
// error and Stringer interfaces on types which only accept a pointer
// receiver when the current type is not a pointer.
//
// NOTE: This might be an unsafe action since calling one of these methods
// with a pointer receiver could technically mutate the value, however,
// in practice, types which choose to satisify an error or Stringer
// interface with a pointer receiver should not be mutating their state
// inside these interface methods. As a result, this option relies on
// access to the unsafe package, so it will not have any effect when
// running in environments without access to the unsafe package such as
// Google App Engine or with the "safe" build tag specified.
DisablePointerMethods bool
// DisablePointerAddresses specifies whether to disable the printing of
// pointer addresses. This is useful when diffing data structures in tests.
DisablePointerAddresses bool
// DisableCapacities specifies whether to disable the printing of capacities
// for arrays, slices, maps and channels. This is useful when diffing
// data structures in tests.
DisableCapacities bool
// ContinueOnMethod specifies whether or not recursion should continue once
// a custom error or Stringer interface is invoked. The default, false,
// means it will print the results of invoking the custom error or Stringer
// interface and return immediately instead of continuing to recurse into
// the internals of the data type.
//
// NOTE: This flag does not have any effect if method invocation is disabled
// via the DisableMethods or DisablePointerMethods options.
ContinueOnMethod bool
// SortKeys specifies map keys should be sorted before being printed. Use
// this to have a more deterministic, diffable output. Note that only
// native types (bool, int, uint, floats, uintptr and string) and types
// that support the error or Stringer interfaces (if methods are
// enabled) are supported, with other types sorted according to the
// reflect.Value.String() output which guarantees display stability.
SortKeys bool
// SpewKeys specifies that, as a last resort attempt, map keys should
// be spewed to strings and sorted by those strings. This is only
// considered if SortKeys is true.
SpewKeys bool
}
// Config is the active configuration of the top-level functions.
// The configuration can be changed by modifying the contents of spew.Config.
var Config = ConfigState{Indent: " "}
// Errorf is a wrapper for fmt.Errorf that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the formatted string as a value that satisfies error. See NewFormatter
// for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Errorf(format, c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Errorf(format string, a ...interface{}) (err error) {
return fmt.Errorf(format, c.convertArgs(a)...)
}
// Fprint is a wrapper for fmt.Fprint that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Fprint(w, c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Fprint(w io.Writer, a ...interface{}) (n int, err error) {
return fmt.Fprint(w, c.convertArgs(a)...)
}
// Fprintf is a wrapper for fmt.Fprintf that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Fprintf(w, format, c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Fprintf(w io.Writer, format string, a ...interface{}) (n int, err error) {
return fmt.Fprintf(w, format, c.convertArgs(a)...)
}
// Fprintln is a wrapper for fmt.Fprintln that treats each argument as if it
// passed with a Formatter interface returned by c.NewFormatter. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Fprintln(w, c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Fprintln(w io.Writer, a ...interface{}) (n int, err error) {
return fmt.Fprintln(w, c.convertArgs(a)...)
}
// Print is a wrapper for fmt.Print that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Print(c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Print(a ...interface{}) (n int, err error) {
return fmt.Print(c.convertArgs(a)...)
}
// Printf is a wrapper for fmt.Printf that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Printf(format, c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Printf(format string, a ...interface{}) (n int, err error) {
return fmt.Printf(format, c.convertArgs(a)...)
}
// Println is a wrapper for fmt.Println that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Println(c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Println(a ...interface{}) (n int, err error) {
return fmt.Println(c.convertArgs(a)...)
}
// Sprint is a wrapper for fmt.Sprint that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the resulting string. See NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Sprint(c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Sprint(a ...interface{}) string {
return fmt.Sprint(c.convertArgs(a)...)
}
// Sprintf is a wrapper for fmt.Sprintf that treats each argument as if it were
// passed with a Formatter interface returned by c.NewFormatter. It returns
// the resulting string. See NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Sprintf(format, c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Sprintf(format string, a ...interface{}) string {
return fmt.Sprintf(format, c.convertArgs(a)...)
}
// Sprintln is a wrapper for fmt.Sprintln that treats each argument as if it
// were passed with a Formatter interface returned by c.NewFormatter. It
// returns the resulting string. See NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Sprintln(c.NewFormatter(a), c.NewFormatter(b))
func (c *ConfigState) Sprintln(a ...interface{}) string {
return fmt.Sprintln(c.convertArgs(a)...)
}
/*
NewFormatter returns a custom formatter that satisfies the fmt.Formatter
interface. As a result, it integrates cleanly with standard fmt package
printing functions. The formatter is useful for inline printing of smaller data
types similar to the standard %v format specifier.
The custom formatter only responds to the %v (most compact), %+v (adds pointer
addresses), %#v (adds types), and %#+v (adds types and pointer addresses) verb
combinations. Any other verbs such as %x and %q will be sent to the the
standard fmt package for formatting. In addition, the custom formatter ignores
the width and precision arguments (however they will still work on the format
specifiers not handled by the custom formatter).
Typically this function shouldn't be called directly. It is much easier to make
use of the custom formatter by calling one of the convenience functions such as
c.Printf, c.Println, or c.Printf.
*/
func (c *ConfigState) NewFormatter(v interface{}) fmt.Formatter {
return newFormatter(c, v)
}
// Fdump formats and displays the passed arguments to io.Writer w. It formats
// exactly the same as Dump.
func (c *ConfigState) Fdump(w io.Writer, a ...interface{}) {
fdump(c, w, a...)
}
/*
Dump displays the passed parameters to standard out with newlines, customizable
indentation, and additional debug information such as complete types and all
pointer addresses used to indirect to the final value. It provides the
following features over the built-in printing facilities provided by the fmt
package:
* Pointers are dereferenced and followed
* Circular data structures are detected and handled properly
* Custom Stringer/error interfaces are optionally invoked, including
on unexported types
* Custom types which only implement the Stringer/error interfaces via
a pointer receiver are optionally invoked when passing non-pointer
variables
* Byte arrays and slices are dumped like the hexdump -C command which
includes offsets, byte values in hex, and ASCII output
The configuration options are controlled by modifying the public members
of c. See ConfigState for options documentation.
See Fdump if you would prefer dumping to an arbitrary io.Writer or Sdump to
get the formatted result as a string.
*/
func (c *ConfigState) Dump(a ...interface{}) {
fdump(c, os.Stdout, a...)
}
// Sdump returns a string with the passed arguments formatted exactly the same
// as Dump.
func (c *ConfigState) Sdump(a ...interface{}) string {
var buf bytes.Buffer
fdump(c, &buf, a...)
return buf.String()
}
// convertArgs accepts a slice of arguments and returns a slice of the same
// length with each argument converted to a spew Formatter interface using
// the ConfigState associated with s.
func (c *ConfigState) convertArgs(args []interface{}) (formatters []interface{}) {
formatters = make([]interface{}, len(args))
for index, arg := range args {
formatters[index] = newFormatter(c, arg)
}
return formatters
}
// NewDefaultConfig returns a ConfigState with the following default settings.
//
// Indent: " "
// MaxDepth: 0
// DisableMethods: false
// DisablePointerMethods: false
// ContinueOnMethod: false
// SortKeys: false
func NewDefaultConfig() *ConfigState {
return &ConfigState{Indent: " "}
}

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
Package spew implements a deep pretty printer for Go data structures to aid in
debugging.
A quick overview of the additional features spew provides over the built-in
printing facilities for Go data types are as follows:
* Pointers are dereferenced and followed
* Circular data structures are detected and handled properly
* Custom Stringer/error interfaces are optionally invoked, including
on unexported types
* Custom types which only implement the Stringer/error interfaces via
a pointer receiver are optionally invoked when passing non-pointer
variables
* Byte arrays and slices are dumped like the hexdump -C command which
includes offsets, byte values in hex, and ASCII output (only when using
Dump style)
There are two different approaches spew allows for dumping Go data structures:
* Dump style which prints with newlines, customizable indentation,
and additional debug information such as types and all pointer addresses
used to indirect to the final value
* A custom Formatter interface that integrates cleanly with the standard fmt
package and replaces %v, %+v, %#v, and %#+v to provide inline printing
similar to the default %v while providing the additional functionality
outlined above and passing unsupported format verbs such as %x and %q
along to fmt
Quick Start
This section demonstrates how to quickly get started with spew. See the
sections below for further details on formatting and configuration options.
To dump a variable with full newlines, indentation, type, and pointer
information use Dump, Fdump, or Sdump:
spew.Dump(myVar1, myVar2, ...)
spew.Fdump(someWriter, myVar1, myVar2, ...)
str := spew.Sdump(myVar1, myVar2, ...)
Alternatively, if you would prefer to use format strings with a compacted inline
printing style, use the convenience wrappers Printf, Fprintf, etc with
%v (most compact), %+v (adds pointer addresses), %#v (adds types), or
%#+v (adds types and pointer addresses):
spew.Printf("myVar1: %v -- myVar2: %+v", myVar1, myVar2)
spew.Printf("myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
spew.Fprintf(someWriter, "myVar1: %v -- myVar2: %+v", myVar1, myVar2)
spew.Fprintf(someWriter, "myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
Configuration Options
Configuration of spew is handled by fields in the ConfigState type. For
convenience, all of the top-level functions use a global state available
via the spew.Config global.
It is also possible to create a ConfigState instance that provides methods
equivalent to the top-level functions. This allows concurrent configuration
options. See the ConfigState documentation for more details.
The following configuration options are available:
* Indent
String to use for each indentation level for Dump functions.
It is a single space by default. A popular alternative is "\t".
* MaxDepth
Maximum number of levels to descend into nested data structures.
There is no limit by default.
* DisableMethods
Disables invocation of error and Stringer interface methods.
Method invocation is enabled by default.
* DisablePointerMethods
Disables invocation of error and Stringer interface methods on types
which only accept pointer receivers from non-pointer variables.
Pointer method invocation is enabled by default.
* DisablePointerAddresses
DisablePointerAddresses specifies whether to disable the printing of
pointer addresses. This is useful when diffing data structures in tests.
* DisableCapacities
DisableCapacities specifies whether to disable the printing of
capacities for arrays, slices, maps and channels. This is useful when
diffing data structures in tests.
* ContinueOnMethod
Enables recursion into types after invoking error and Stringer interface
methods. Recursion after method invocation is disabled by default.
* SortKeys
Specifies map keys should be sorted before being printed. Use
this to have a more deterministic, diffable output. Note that
only native types (bool, int, uint, floats, uintptr and string)
and types which implement error or Stringer interfaces are
supported with other types sorted according to the
reflect.Value.String() output which guarantees display
stability. Natural map order is used by default.
* SpewKeys
Specifies that, as a last resort attempt, map keys should be
spewed to strings and sorted by those strings. This is only
considered if SortKeys is true.
Dump Usage
Simply call spew.Dump with a list of variables you want to dump:
spew.Dump(myVar1, myVar2, ...)
You may also call spew.Fdump if you would prefer to output to an arbitrary
io.Writer. For example, to dump to standard error:
spew.Fdump(os.Stderr, myVar1, myVar2, ...)
A third option is to call spew.Sdump to get the formatted output as a string:
str := spew.Sdump(myVar1, myVar2, ...)
Sample Dump Output
See the Dump example for details on the setup of the types and variables being
shown here.
(main.Foo) {
unexportedField: (*main.Bar)(0xf84002e210)({
flag: (main.Flag) flagTwo,
data: (uintptr) <nil>
}),
ExportedField: (map[interface {}]interface {}) (len=1) {
(string) (len=3) "one": (bool) true
}
}
Byte (and uint8) arrays and slices are displayed uniquely like the hexdump -C
command as shown.
([]uint8) (len=32 cap=32) {
00000000 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 |............... |
00000010 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30 |!"#$%&'()*+,-./0|
00000020 31 32 |12|
}
Custom Formatter
Spew provides a custom formatter that implements the fmt.Formatter interface
so that it integrates cleanly with standard fmt package printing functions. The
formatter is useful for inline printing of smaller data types similar to the
standard %v format specifier.
The custom formatter only responds to the %v (most compact), %+v (adds pointer
addresses), %#v (adds types), or %#+v (adds types and pointer addresses) verb
combinations. Any other verbs such as %x and %q will be sent to the the
standard fmt package for formatting. In addition, the custom formatter ignores
the width and precision arguments (however they will still work on the format
specifiers not handled by the custom formatter).
Custom Formatter Usage
The simplest way to make use of the spew custom formatter is to call one of the
convenience functions such as spew.Printf, spew.Println, or spew.Printf. The
functions have syntax you are most likely already familiar with:
spew.Printf("myVar1: %v -- myVar2: %+v", myVar1, myVar2)
spew.Printf("myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
spew.Println(myVar, myVar2)
spew.Fprintf(os.Stderr, "myVar1: %v -- myVar2: %+v", myVar1, myVar2)
spew.Fprintf(os.Stderr, "myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
See the Index for the full list convenience functions.
Sample Formatter Output
Double pointer to a uint8:
%v: <**>5
%+v: <**>(0xf8400420d0->0xf8400420c8)5
%#v: (**uint8)5
%#+v: (**uint8)(0xf8400420d0->0xf8400420c8)5
Pointer to circular struct with a uint8 field and a pointer to itself:
%v: <*>{1 <*><shown>}
%+v: <*>(0xf84003e260){ui8:1 c:<*>(0xf84003e260)<shown>}
%#v: (*main.circular){ui8:(uint8)1 c:(*main.circular)<shown>}
%#+v: (*main.circular)(0xf84003e260){ui8:(uint8)1 c:(*main.circular)(0xf84003e260)<shown>}
See the Printf example for details on the setup of variables being shown
here.
Errors
Since it is possible for custom Stringer/error interfaces to panic, spew
detects them and handles them internally by printing the panic information
inline with the output. Since spew is intended to provide deep pretty printing
capabilities on structures, it intentionally does not return any errors.
*/
package spew

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package spew
import (
"bytes"
"encoding/hex"
"fmt"
"io"
"os"
"reflect"
"regexp"
"strconv"
"strings"
)
var (
// uint8Type is a reflect.Type representing a uint8. It is used to
// convert cgo types to uint8 slices for hexdumping.
uint8Type = reflect.TypeOf(uint8(0))
// cCharRE is a regular expression that matches a cgo char.
// It is used to detect character arrays to hexdump them.
cCharRE = regexp.MustCompile("^.*\\._Ctype_char$")
// cUnsignedCharRE is a regular expression that matches a cgo unsigned
// char. It is used to detect unsigned character arrays to hexdump
// them.
cUnsignedCharRE = regexp.MustCompile("^.*\\._Ctype_unsignedchar$")
// cUint8tCharRE is a regular expression that matches a cgo uint8_t.
// It is used to detect uint8_t arrays to hexdump them.
cUint8tCharRE = regexp.MustCompile("^.*\\._Ctype_uint8_t$")
)
// dumpState contains information about the state of a dump operation.
type dumpState struct {
w io.Writer
depth int
pointers map[uintptr]int
ignoreNextType bool
ignoreNextIndent bool
cs *ConfigState
}
// indent performs indentation according to the depth level and cs.Indent
// option.
func (d *dumpState) indent() {
if d.ignoreNextIndent {
d.ignoreNextIndent = false
return
}
d.w.Write(bytes.Repeat([]byte(d.cs.Indent), d.depth))
}
// unpackValue returns values inside of non-nil interfaces when possible.
// This is useful for data types like structs, arrays, slices, and maps which
// can contain varying types packed inside an interface.
func (d *dumpState) unpackValue(v reflect.Value) reflect.Value {
if v.Kind() == reflect.Interface && !v.IsNil() {
v = v.Elem()
}
return v
}
// dumpPtr handles formatting of pointers by indirecting them as necessary.
func (d *dumpState) dumpPtr(v reflect.Value) {
// Remove pointers at or below the current depth from map used to detect
// circular refs.
for k, depth := range d.pointers {
if depth >= d.depth {
delete(d.pointers, k)
}
}
// Keep list of all dereferenced pointers to show later.
pointerChain := make([]uintptr, 0)
// Figure out how many levels of indirection there are by dereferencing
// pointers and unpacking interfaces down the chain while detecting circular
// references.
nilFound := false
cycleFound := false
indirects := 0
ve := v
for ve.Kind() == reflect.Ptr {
if ve.IsNil() {
nilFound = true
break
}
indirects++
addr := ve.Pointer()
pointerChain = append(pointerChain, addr)
if pd, ok := d.pointers[addr]; ok && pd < d.depth {
cycleFound = true
indirects--
break
}
d.pointers[addr] = d.depth
ve = ve.Elem()
if ve.Kind() == reflect.Interface {
if ve.IsNil() {
nilFound = true
break
}
ve = ve.Elem()
}
}
// Display type information.
d.w.Write(openParenBytes)
d.w.Write(bytes.Repeat(asteriskBytes, indirects))
d.w.Write([]byte(ve.Type().String()))
d.w.Write(closeParenBytes)
// Display pointer information.
if !d.cs.DisablePointerAddresses && len(pointerChain) > 0 {
d.w.Write(openParenBytes)
for i, addr := range pointerChain {
if i > 0 {
d.w.Write(pointerChainBytes)
}
printHexPtr(d.w, addr)
}
d.w.Write(closeParenBytes)
}
// Display dereferenced value.
d.w.Write(openParenBytes)
switch {
case nilFound == true:
d.w.Write(nilAngleBytes)
case cycleFound == true:
d.w.Write(circularBytes)
default:
d.ignoreNextType = true
d.dump(ve)
}
d.w.Write(closeParenBytes)
}
// dumpSlice handles formatting of arrays and slices. Byte (uint8 under
// reflection) arrays and slices are dumped in hexdump -C fashion.
func (d *dumpState) dumpSlice(v reflect.Value) {
// Determine whether this type should be hex dumped or not. Also,
// for types which should be hexdumped, try to use the underlying data
// first, then fall back to trying to convert them to a uint8 slice.
var buf []uint8
doConvert := false
doHexDump := false
numEntries := v.Len()
if numEntries > 0 {
vt := v.Index(0).Type()
vts := vt.String()
switch {
// C types that need to be converted.
case cCharRE.MatchString(vts):
fallthrough
case cUnsignedCharRE.MatchString(vts):
fallthrough
case cUint8tCharRE.MatchString(vts):
doConvert = true
// Try to use existing uint8 slices and fall back to converting
// and copying if that fails.
case vt.Kind() == reflect.Uint8:
// We need an addressable interface to convert the type
// to a byte slice. However, the reflect package won't
// give us an interface on certain things like
// unexported struct fields in order to enforce
// visibility rules. We use unsafe, when available, to
// bypass these restrictions since this package does not
// mutate the values.
vs := v
if !vs.CanInterface() || !vs.CanAddr() {
vs = unsafeReflectValue(vs)
}
if !UnsafeDisabled {
vs = vs.Slice(0, numEntries)
// Use the existing uint8 slice if it can be
// type asserted.
iface := vs.Interface()
if slice, ok := iface.([]uint8); ok {
buf = slice
doHexDump = true
break
}
}
// The underlying data needs to be converted if it can't
// be type asserted to a uint8 slice.
doConvert = true
}
// Copy and convert the underlying type if needed.
if doConvert && vt.ConvertibleTo(uint8Type) {
// Convert and copy each element into a uint8 byte
// slice.
buf = make([]uint8, numEntries)
for i := 0; i < numEntries; i++ {
vv := v.Index(i)
buf[i] = uint8(vv.Convert(uint8Type).Uint())
}
doHexDump = true
}
}
// Hexdump the entire slice as needed.
if doHexDump {
indent := strings.Repeat(d.cs.Indent, d.depth)
str := indent + hex.Dump(buf)
str = strings.Replace(str, "\n", "\n"+indent, -1)
str = strings.TrimRight(str, d.cs.Indent)
d.w.Write([]byte(str))
return
}
// Recursively call dump for each item.
for i := 0; i < numEntries; i++ {
d.dump(d.unpackValue(v.Index(i)))
if i < (numEntries - 1) {
d.w.Write(commaNewlineBytes)
} else {
d.w.Write(newlineBytes)
}
}
}
// dump is the main workhorse for dumping a value. It uses the passed reflect
// value to figure out what kind of object we are dealing with and formats it
// appropriately. It is a recursive function, however circular data structures
// are detected and handled properly.
func (d *dumpState) dump(v reflect.Value) {
// Handle invalid reflect values immediately.
kind := v.Kind()
if kind == reflect.Invalid {
d.w.Write(invalidAngleBytes)
return
}
// Handle pointers specially.
if kind == reflect.Ptr {
d.indent()
d.dumpPtr(v)
return
}
// Print type information unless already handled elsewhere.
if !d.ignoreNextType {
d.indent()
d.w.Write(openParenBytes)
d.w.Write([]byte(v.Type().String()))
d.w.Write(closeParenBytes)
d.w.Write(spaceBytes)
}
d.ignoreNextType = false
// Display length and capacity if the built-in len and cap functions
// work with the value's kind and the len/cap itself is non-zero.
valueLen, valueCap := 0, 0
switch v.Kind() {
case reflect.Array, reflect.Slice, reflect.Chan:
valueLen, valueCap = v.Len(), v.Cap()
case reflect.Map, reflect.String:
valueLen = v.Len()
}
if valueLen != 0 || !d.cs.DisableCapacities && valueCap != 0 {
d.w.Write(openParenBytes)
if valueLen != 0 {
d.w.Write(lenEqualsBytes)
printInt(d.w, int64(valueLen), 10)
}
if !d.cs.DisableCapacities && valueCap != 0 {
if valueLen != 0 {
d.w.Write(spaceBytes)
}
d.w.Write(capEqualsBytes)
printInt(d.w, int64(valueCap), 10)
}
d.w.Write(closeParenBytes)
d.w.Write(spaceBytes)
}
// Call Stringer/error interfaces if they exist and the handle methods flag
// is enabled
if !d.cs.DisableMethods {
if (kind != reflect.Invalid) && (kind != reflect.Interface) {
if handled := handleMethods(d.cs, d.w, v); handled {
return
}
}
}
switch kind {
case reflect.Invalid:
// Do nothing. We should never get here since invalid has already
// been handled above.
case reflect.Bool:
printBool(d.w, v.Bool())
case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
printInt(d.w, v.Int(), 10)
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
printUint(d.w, v.Uint(), 10)
case reflect.Float32:
printFloat(d.w, v.Float(), 32)
case reflect.Float64:
printFloat(d.w, v.Float(), 64)
case reflect.Complex64:
printComplex(d.w, v.Complex(), 32)
case reflect.Complex128:
printComplex(d.w, v.Complex(), 64)
case reflect.Slice:
if v.IsNil() {
d.w.Write(nilAngleBytes)
break
}
fallthrough
case reflect.Array:
d.w.Write(openBraceNewlineBytes)
d.depth++
if (d.cs.MaxDepth != 0) && (d.depth > d.cs.MaxDepth) {
d.indent()
d.w.Write(maxNewlineBytes)
} else {
d.dumpSlice(v)
}
d.depth--
d.indent()
d.w.Write(closeBraceBytes)
case reflect.String:
d.w.Write([]byte(strconv.Quote(v.String())))
case reflect.Interface:
// The only time we should get here is for nil interfaces due to
// unpackValue calls.
if v.IsNil() {
d.w.Write(nilAngleBytes)
}
case reflect.Ptr:
// Do nothing. We should never get here since pointers have already
// been handled above.
case reflect.Map:
// nil maps should be indicated as different than empty maps
if v.IsNil() {
d.w.Write(nilAngleBytes)
break
}
d.w.Write(openBraceNewlineBytes)
d.depth++
if (d.cs.MaxDepth != 0) && (d.depth > d.cs.MaxDepth) {
d.indent()
d.w.Write(maxNewlineBytes)
} else {
numEntries := v.Len()
keys := v.MapKeys()
if d.cs.SortKeys {
sortValues(keys, d.cs)
}
for i, key := range keys {
d.dump(d.unpackValue(key))
d.w.Write(colonSpaceBytes)
d.ignoreNextIndent = true
d.dump(d.unpackValue(v.MapIndex(key)))
if i < (numEntries - 1) {
d.w.Write(commaNewlineBytes)
} else {
d.w.Write(newlineBytes)
}
}
}
d.depth--
d.indent()
d.w.Write(closeBraceBytes)
case reflect.Struct:
d.w.Write(openBraceNewlineBytes)
d.depth++
if (d.cs.MaxDepth != 0) && (d.depth > d.cs.MaxDepth) {
d.indent()
d.w.Write(maxNewlineBytes)
} else {
vt := v.Type()
numFields := v.NumField()
for i := 0; i < numFields; i++ {
d.indent()
vtf := vt.Field(i)
d.w.Write([]byte(vtf.Name))
d.w.Write(colonSpaceBytes)
d.ignoreNextIndent = true
d.dump(d.unpackValue(v.Field(i)))
if i < (numFields - 1) {
d.w.Write(commaNewlineBytes)
} else {
d.w.Write(newlineBytes)
}
}
}
d.depth--
d.indent()
d.w.Write(closeBraceBytes)
case reflect.Uintptr:
printHexPtr(d.w, uintptr(v.Uint()))
case reflect.UnsafePointer, reflect.Chan, reflect.Func:
printHexPtr(d.w, v.Pointer())
// There were not any other types at the time this code was written, but
// fall back to letting the default fmt package handle it in case any new
// types are added.
default:
if v.CanInterface() {
fmt.Fprintf(d.w, "%v", v.Interface())
} else {
fmt.Fprintf(d.w, "%v", v.String())
}
}
}
// fdump is a helper function to consolidate the logic from the various public
// methods which take varying writers and config states.
func fdump(cs *ConfigState, w io.Writer, a ...interface{}) {
for _, arg := range a {
if arg == nil {
w.Write(interfaceBytes)
w.Write(spaceBytes)
w.Write(nilAngleBytes)
w.Write(newlineBytes)
continue
}
d := dumpState{w: w, cs: cs}
d.pointers = make(map[uintptr]int)
d.dump(reflect.ValueOf(arg))
d.w.Write(newlineBytes)
}
}
// Fdump formats and displays the passed arguments to io.Writer w. It formats
// exactly the same as Dump.
func Fdump(w io.Writer, a ...interface{}) {
fdump(&Config, w, a...)
}
// Sdump returns a string with the passed arguments formatted exactly the same
// as Dump.
func Sdump(a ...interface{}) string {
var buf bytes.Buffer
fdump(&Config, &buf, a...)
return buf.String()
}
/*
Dump displays the passed parameters to standard out with newlines, customizable
indentation, and additional debug information such as complete types and all
pointer addresses used to indirect to the final value. It provides the
following features over the built-in printing facilities provided by the fmt
package:
* Pointers are dereferenced and followed
* Circular data structures are detected and handled properly
* Custom Stringer/error interfaces are optionally invoked, including
on unexported types
* Custom types which only implement the Stringer/error interfaces via
a pointer receiver are optionally invoked when passing non-pointer
variables
* Byte arrays and slices are dumped like the hexdump -C command which
includes offsets, byte values in hex, and ASCII output
The configuration options are controlled by an exported package global,
spew.Config. See ConfigState for options documentation.
See Fdump if you would prefer dumping to an arbitrary io.Writer or Sdump to
get the formatted result as a string.
*/
func Dump(a ...interface{}) {
fdump(&Config, os.Stdout, a...)
}

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// Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
// NOTE: Due to the following build constraints, this file will only be compiled
// when both cgo is supported and "-tags testcgo" is added to the go test
// command line. This means the cgo tests are only added (and hence run) when
// specifially requested. This configuration is used because spew itself
// does not require cgo to run even though it does handle certain cgo types
// specially. Rather than forcing all clients to require cgo and an external
// C compiler just to run the tests, this scheme makes them optional.
// +build cgo,testcgo
package spew_test
import (
"fmt"
"github.com/davecgh/go-spew/spew/testdata"
)
func addCgoDumpTests() {
// C char pointer.
v := testdata.GetCgoCharPointer()
nv := testdata.GetCgoNullCharPointer()
pv := &v
vcAddr := fmt.Sprintf("%p", v)
vAddr := fmt.Sprintf("%p", pv)
pvAddr := fmt.Sprintf("%p", &pv)
vt := "*testdata._Ctype_char"
vs := "116"
addDumpTest(v, "("+vt+")("+vcAddr+")("+vs+")\n")
addDumpTest(pv, "(*"+vt+")("+vAddr+"->"+vcAddr+")("+vs+")\n")
addDumpTest(&pv, "(**"+vt+")("+pvAddr+"->"+vAddr+"->"+vcAddr+")("+vs+")\n")
addDumpTest(nv, "("+vt+")(<nil>)\n")
// C char array.
v2, v2l, v2c := testdata.GetCgoCharArray()
v2Len := fmt.Sprintf("%d", v2l)
v2Cap := fmt.Sprintf("%d", v2c)
v2t := "[6]testdata._Ctype_char"
v2s := "(len=" + v2Len + " cap=" + v2Cap + ") " +
"{\n 00000000 74 65 73 74 32 00 " +
" |test2.|\n}"
addDumpTest(v2, "("+v2t+") "+v2s+"\n")
// C unsigned char array.
v3, v3l, v3c := testdata.GetCgoUnsignedCharArray()
v3Len := fmt.Sprintf("%d", v3l)
v3Cap := fmt.Sprintf("%d", v3c)
v3t := "[6]testdata._Ctype_unsignedchar"
v3t2 := "[6]testdata._Ctype_uchar"
v3s := "(len=" + v3Len + " cap=" + v3Cap + ") " +
"{\n 00000000 74 65 73 74 33 00 " +
" |test3.|\n}"
addDumpTest(v3, "("+v3t+") "+v3s+"\n", "("+v3t2+") "+v3s+"\n")
// C signed char array.
v4, v4l, v4c := testdata.GetCgoSignedCharArray()
v4Len := fmt.Sprintf("%d", v4l)
v4Cap := fmt.Sprintf("%d", v4c)
v4t := "[6]testdata._Ctype_schar"
v4t2 := "testdata._Ctype_schar"
v4s := "(len=" + v4Len + " cap=" + v4Cap + ") " +
"{\n (" + v4t2 + ") 116,\n (" + v4t2 + ") 101,\n (" + v4t2 +
") 115,\n (" + v4t2 + ") 116,\n (" + v4t2 + ") 52,\n (" + v4t2 +
") 0\n}"
addDumpTest(v4, "("+v4t+") "+v4s+"\n")
// C uint8_t array.
v5, v5l, v5c := testdata.GetCgoUint8tArray()
v5Len := fmt.Sprintf("%d", v5l)
v5Cap := fmt.Sprintf("%d", v5c)
v5t := "[6]testdata._Ctype_uint8_t"
v5s := "(len=" + v5Len + " cap=" + v5Cap + ") " +
"{\n 00000000 74 65 73 74 35 00 " +
" |test5.|\n}"
addDumpTest(v5, "("+v5t+") "+v5s+"\n")
// C typedefed unsigned char array.
v6, v6l, v6c := testdata.GetCgoTypdefedUnsignedCharArray()
v6Len := fmt.Sprintf("%d", v6l)
v6Cap := fmt.Sprintf("%d", v6c)
v6t := "[6]testdata._Ctype_custom_uchar_t"
v6s := "(len=" + v6Len + " cap=" + v6Cap + ") " +
"{\n 00000000 74 65 73 74 36 00 " +
" |test6.|\n}"
addDumpTest(v6, "("+v6t+") "+v6s+"\n")
}

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// Copyright (c) 2013 Dave Collins <dave@davec.name>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
// NOTE: Due to the following build constraints, this file will only be compiled
// when either cgo is not supported or "-tags testcgo" is not added to the go
// test command line. This file intentionally does not setup any cgo tests in
// this scenario.
// +build !cgo !testcgo
package spew_test
func addCgoDumpTests() {
// Don't add any tests for cgo since this file is only compiled when
// there should not be any cgo tests.
}

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package spew_test
import (
"fmt"
"github.com/davecgh/go-spew/spew"
)
type Flag int
const (
flagOne Flag = iota
flagTwo
)
var flagStrings = map[Flag]string{
flagOne: "flagOne",
flagTwo: "flagTwo",
}
func (f Flag) String() string {
if s, ok := flagStrings[f]; ok {
return s
}
return fmt.Sprintf("Unknown flag (%d)", int(f))
}
type Bar struct {
data uintptr
}
type Foo struct {
unexportedField Bar
ExportedField map[interface{}]interface{}
}
// This example demonstrates how to use Dump to dump variables to stdout.
func ExampleDump() {
// The following package level declarations are assumed for this example:
/*
type Flag int
const (
flagOne Flag = iota
flagTwo
)
var flagStrings = map[Flag]string{
flagOne: "flagOne",
flagTwo: "flagTwo",
}
func (f Flag) String() string {
if s, ok := flagStrings[f]; ok {
return s
}
return fmt.Sprintf("Unknown flag (%d)", int(f))
}
type Bar struct {
data uintptr
}
type Foo struct {
unexportedField Bar
ExportedField map[interface{}]interface{}
}
*/
// Setup some sample data structures for the example.
bar := Bar{uintptr(0)}
s1 := Foo{bar, map[interface{}]interface{}{"one": true}}
f := Flag(5)
b := []byte{
0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
0x31, 0x32,
}
// Dump!
spew.Dump(s1, f, b)
// Output:
// (spew_test.Foo) {
// unexportedField: (spew_test.Bar) {
// data: (uintptr) <nil>
// },
// ExportedField: (map[interface {}]interface {}) (len=1) {
// (string) (len=3) "one": (bool) true
// }
// }
// (spew_test.Flag) Unknown flag (5)
// ([]uint8) (len=34 cap=34) {
// 00000000 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 |............... |
// 00000010 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30 |!"#$%&'()*+,-./0|
// 00000020 31 32 |12|
// }
//
}
// This example demonstrates how to use Printf to display a variable with a
// format string and inline formatting.
func ExamplePrintf() {
// Create a double pointer to a uint 8.
ui8 := uint8(5)
pui8 := &ui8
ppui8 := &pui8
// Create a circular data type.
type circular struct {
ui8 uint8
c *circular
}
c := circular{ui8: 1}
c.c = &c
// Print!
spew.Printf("ppui8: %v\n", ppui8)
spew.Printf("circular: %v\n", c)
// Output:
// ppui8: <**>5
// circular: {1 <*>{1 <*><shown>}}
}
// This example demonstrates how to use a ConfigState.
func ExampleConfigState() {
// Modify the indent level of the ConfigState only. The global
// configuration is not modified.
scs := spew.ConfigState{Indent: "\t"}
// Output using the ConfigState instance.
v := map[string]int{"one": 1}
scs.Printf("v: %v\n", v)
scs.Dump(v)
// Output:
// v: map[one:1]
// (map[string]int) (len=1) {
// (string) (len=3) "one": (int) 1
// }
}
// This example demonstrates how to use ConfigState.Dump to dump variables to
// stdout
func ExampleConfigState_Dump() {
// See the top-level Dump example for details on the types used in this
// example.
// Create two ConfigState instances with different indentation.
scs := spew.ConfigState{Indent: "\t"}
scs2 := spew.ConfigState{Indent: " "}
// Setup some sample data structures for the example.
bar := Bar{uintptr(0)}
s1 := Foo{bar, map[interface{}]interface{}{"one": true}}
// Dump using the ConfigState instances.
scs.Dump(s1)
scs2.Dump(s1)
// Output:
// (spew_test.Foo) {
// unexportedField: (spew_test.Bar) {
// data: (uintptr) <nil>
// },
// ExportedField: (map[interface {}]interface {}) (len=1) {
// (string) (len=3) "one": (bool) true
// }
// }
// (spew_test.Foo) {
// unexportedField: (spew_test.Bar) {
// data: (uintptr) <nil>
// },
// ExportedField: (map[interface {}]interface {}) (len=1) {
// (string) (len=3) "one": (bool) true
// }
// }
//
}
// This example demonstrates how to use ConfigState.Printf to display a variable
// with a format string and inline formatting.
func ExampleConfigState_Printf() {
// See the top-level Dump example for details on the types used in this
// example.
// Create two ConfigState instances and modify the method handling of the
// first ConfigState only.
scs := spew.NewDefaultConfig()
scs2 := spew.NewDefaultConfig()
scs.DisableMethods = true
// Alternatively
// scs := spew.ConfigState{Indent: " ", DisableMethods: true}
// scs2 := spew.ConfigState{Indent: " "}
// This is of type Flag which implements a Stringer and has raw value 1.
f := flagTwo
// Dump using the ConfigState instances.
scs.Printf("f: %v\n", f)
scs2.Printf("f: %v\n", f)
// Output:
// f: 1
// f: flagTwo
}

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package spew
import (
"bytes"
"fmt"
"reflect"
"strconv"
"strings"
)
// supportedFlags is a list of all the character flags supported by fmt package.
const supportedFlags = "0-+# "
// formatState implements the fmt.Formatter interface and contains information
// about the state of a formatting operation. The NewFormatter function can
// be used to get a new Formatter which can be used directly as arguments
// in standard fmt package printing calls.
type formatState struct {
value interface{}
fs fmt.State
depth int
pointers map[uintptr]int
ignoreNextType bool
cs *ConfigState
}
// buildDefaultFormat recreates the original format string without precision
// and width information to pass in to fmt.Sprintf in the case of an
// unrecognized type. Unless new types are added to the language, this
// function won't ever be called.
func (f *formatState) buildDefaultFormat() (format string) {
buf := bytes.NewBuffer(percentBytes)
for _, flag := range supportedFlags {
if f.fs.Flag(int(flag)) {
buf.WriteRune(flag)
}
}
buf.WriteRune('v')
format = buf.String()
return format
}
// constructOrigFormat recreates the original format string including precision
// and width information to pass along to the standard fmt package. This allows
// automatic deferral of all format strings this package doesn't support.
func (f *formatState) constructOrigFormat(verb rune) (format string) {
buf := bytes.NewBuffer(percentBytes)
for _, flag := range supportedFlags {
if f.fs.Flag(int(flag)) {
buf.WriteRune(flag)
}
}
if width, ok := f.fs.Width(); ok {
buf.WriteString(strconv.Itoa(width))
}
if precision, ok := f.fs.Precision(); ok {
buf.Write(precisionBytes)
buf.WriteString(strconv.Itoa(precision))
}
buf.WriteRune(verb)
format = buf.String()
return format
}
// unpackValue returns values inside of non-nil interfaces when possible and
// ensures that types for values which have been unpacked from an interface
// are displayed when the show types flag is also set.
// This is useful for data types like structs, arrays, slices, and maps which
// can contain varying types packed inside an interface.
func (f *formatState) unpackValue(v reflect.Value) reflect.Value {
if v.Kind() == reflect.Interface {
f.ignoreNextType = false
if !v.IsNil() {
v = v.Elem()
}
}
return v
}
// formatPtr handles formatting of pointers by indirecting them as necessary.
func (f *formatState) formatPtr(v reflect.Value) {
// Display nil if top level pointer is nil.
showTypes := f.fs.Flag('#')
if v.IsNil() && (!showTypes || f.ignoreNextType) {
f.fs.Write(nilAngleBytes)
return
}
// Remove pointers at or below the current depth from map used to detect
// circular refs.
for k, depth := range f.pointers {
if depth >= f.depth {
delete(f.pointers, k)
}
}
// Keep list of all dereferenced pointers to possibly show later.
pointerChain := make([]uintptr, 0)
// Figure out how many levels of indirection there are by derferencing
// pointers and unpacking interfaces down the chain while detecting circular
// references.
nilFound := false
cycleFound := false
indirects := 0
ve := v
for ve.Kind() == reflect.Ptr {
if ve.IsNil() {
nilFound = true
break
}
indirects++
addr := ve.Pointer()
pointerChain = append(pointerChain, addr)
if pd, ok := f.pointers[addr]; ok && pd < f.depth {
cycleFound = true
indirects--
break
}
f.pointers[addr] = f.depth
ve = ve.Elem()
if ve.Kind() == reflect.Interface {
if ve.IsNil() {
nilFound = true
break
}
ve = ve.Elem()
}
}
// Display type or indirection level depending on flags.
if showTypes && !f.ignoreNextType {
f.fs.Write(openParenBytes)
f.fs.Write(bytes.Repeat(asteriskBytes, indirects))
f.fs.Write([]byte(ve.Type().String()))
f.fs.Write(closeParenBytes)
} else {
if nilFound || cycleFound {
indirects += strings.Count(ve.Type().String(), "*")
}
f.fs.Write(openAngleBytes)
f.fs.Write([]byte(strings.Repeat("*", indirects)))
f.fs.Write(closeAngleBytes)
}
// Display pointer information depending on flags.
if f.fs.Flag('+') && (len(pointerChain) > 0) {
f.fs.Write(openParenBytes)
for i, addr := range pointerChain {
if i > 0 {
f.fs.Write(pointerChainBytes)
}
printHexPtr(f.fs, addr)
}
f.fs.Write(closeParenBytes)
}
// Display dereferenced value.
switch {
case nilFound == true:
f.fs.Write(nilAngleBytes)
case cycleFound == true:
f.fs.Write(circularShortBytes)
default:
f.ignoreNextType = true
f.format(ve)
}
}
// format is the main workhorse for providing the Formatter interface. It
// uses the passed reflect value to figure out what kind of object we are
// dealing with and formats it appropriately. It is a recursive function,
// however circular data structures are detected and handled properly.
func (f *formatState) format(v reflect.Value) {
// Handle invalid reflect values immediately.
kind := v.Kind()
if kind == reflect.Invalid {
f.fs.Write(invalidAngleBytes)
return
}
// Handle pointers specially.
if kind == reflect.Ptr {
f.formatPtr(v)
return
}
// Print type information unless already handled elsewhere.
if !f.ignoreNextType && f.fs.Flag('#') {
f.fs.Write(openParenBytes)
f.fs.Write([]byte(v.Type().String()))
f.fs.Write(closeParenBytes)
}
f.ignoreNextType = false
// Call Stringer/error interfaces if they exist and the handle methods
// flag is enabled.
if !f.cs.DisableMethods {
if (kind != reflect.Invalid) && (kind != reflect.Interface) {
if handled := handleMethods(f.cs, f.fs, v); handled {
return
}
}
}
switch kind {
case reflect.Invalid:
// Do nothing. We should never get here since invalid has already
// been handled above.
case reflect.Bool:
printBool(f.fs, v.Bool())
case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
printInt(f.fs, v.Int(), 10)
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
printUint(f.fs, v.Uint(), 10)
case reflect.Float32:
printFloat(f.fs, v.Float(), 32)
case reflect.Float64:
printFloat(f.fs, v.Float(), 64)
case reflect.Complex64:
printComplex(f.fs, v.Complex(), 32)
case reflect.Complex128:
printComplex(f.fs, v.Complex(), 64)
case reflect.Slice:
if v.IsNil() {
f.fs.Write(nilAngleBytes)
break
}
fallthrough
case reflect.Array:
f.fs.Write(openBracketBytes)
f.depth++
if (f.cs.MaxDepth != 0) && (f.depth > f.cs.MaxDepth) {
f.fs.Write(maxShortBytes)
} else {
numEntries := v.Len()
for i := 0; i < numEntries; i++ {
if i > 0 {
f.fs.Write(spaceBytes)
}
f.ignoreNextType = true
f.format(f.unpackValue(v.Index(i)))
}
}
f.depth--
f.fs.Write(closeBracketBytes)
case reflect.String:
f.fs.Write([]byte(v.String()))
case reflect.Interface:
// The only time we should get here is for nil interfaces due to
// unpackValue calls.
if v.IsNil() {
f.fs.Write(nilAngleBytes)
}
case reflect.Ptr:
// Do nothing. We should never get here since pointers have already
// been handled above.
case reflect.Map:
// nil maps should be indicated as different than empty maps
if v.IsNil() {
f.fs.Write(nilAngleBytes)
break
}
f.fs.Write(openMapBytes)
f.depth++
if (f.cs.MaxDepth != 0) && (f.depth > f.cs.MaxDepth) {
f.fs.Write(maxShortBytes)
} else {
keys := v.MapKeys()
if f.cs.SortKeys {
sortValues(keys, f.cs)
}
for i, key := range keys {
if i > 0 {
f.fs.Write(spaceBytes)
}
f.ignoreNextType = true
f.format(f.unpackValue(key))
f.fs.Write(colonBytes)
f.ignoreNextType = true
f.format(f.unpackValue(v.MapIndex(key)))
}
}
f.depth--
f.fs.Write(closeMapBytes)
case reflect.Struct:
numFields := v.NumField()
f.fs.Write(openBraceBytes)
f.depth++
if (f.cs.MaxDepth != 0) && (f.depth > f.cs.MaxDepth) {
f.fs.Write(maxShortBytes)
} else {
vt := v.Type()
for i := 0; i < numFields; i++ {
if i > 0 {
f.fs.Write(spaceBytes)
}
vtf := vt.Field(i)
if f.fs.Flag('+') || f.fs.Flag('#') {
f.fs.Write([]byte(vtf.Name))
f.fs.Write(colonBytes)
}
f.format(f.unpackValue(v.Field(i)))
}
}
f.depth--
f.fs.Write(closeBraceBytes)
case reflect.Uintptr:
printHexPtr(f.fs, uintptr(v.Uint()))
case reflect.UnsafePointer, reflect.Chan, reflect.Func:
printHexPtr(f.fs, v.Pointer())
// There were not any other types at the time this code was written, but
// fall back to letting the default fmt package handle it if any get added.
default:
format := f.buildDefaultFormat()
if v.CanInterface() {
fmt.Fprintf(f.fs, format, v.Interface())
} else {
fmt.Fprintf(f.fs, format, v.String())
}
}
}
// Format satisfies the fmt.Formatter interface. See NewFormatter for usage
// details.
func (f *formatState) Format(fs fmt.State, verb rune) {
f.fs = fs
// Use standard formatting for verbs that are not v.
if verb != 'v' {
format := f.constructOrigFormat(verb)
fmt.Fprintf(fs, format, f.value)
return
}
if f.value == nil {
if fs.Flag('#') {
fs.Write(interfaceBytes)
}
fs.Write(nilAngleBytes)
return
}
f.format(reflect.ValueOf(f.value))
}
// newFormatter is a helper function to consolidate the logic from the various
// public methods which take varying config states.
func newFormatter(cs *ConfigState, v interface{}) fmt.Formatter {
fs := &formatState{value: v, cs: cs}
fs.pointers = make(map[uintptr]int)
return fs
}
/*
NewFormatter returns a custom formatter that satisfies the fmt.Formatter
interface. As a result, it integrates cleanly with standard fmt package
printing functions. The formatter is useful for inline printing of smaller data
types similar to the standard %v format specifier.
The custom formatter only responds to the %v (most compact), %+v (adds pointer
addresses), %#v (adds types), or %#+v (adds types and pointer addresses) verb
combinations. Any other verbs such as %x and %q will be sent to the the
standard fmt package for formatting. In addition, the custom formatter ignores
the width and precision arguments (however they will still work on the format
specifiers not handled by the custom formatter).
Typically this function shouldn't be called directly. It is much easier to make
use of the custom formatter by calling one of the convenience functions such as
Printf, Println, or Fprintf.
*/
func NewFormatter(v interface{}) fmt.Formatter {
return newFormatter(&Config, v)
}

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
This test file is part of the spew package rather than than the spew_test
package because it needs access to internals to properly test certain cases
which are not possible via the public interface since they should never happen.
*/
package spew
import (
"bytes"
"reflect"
"testing"
)
// dummyFmtState implements a fake fmt.State to use for testing invalid
// reflect.Value handling. This is necessary because the fmt package catches
// invalid values before invoking the formatter on them.
type dummyFmtState struct {
bytes.Buffer
}
func (dfs *dummyFmtState) Flag(f int) bool {
if f == int('+') {
return true
}
return false
}
func (dfs *dummyFmtState) Precision() (int, bool) {
return 0, false
}
func (dfs *dummyFmtState) Width() (int, bool) {
return 0, false
}
// TestInvalidReflectValue ensures the dump and formatter code handles an
// invalid reflect value properly. This needs access to internal state since it
// should never happen in real code and therefore can't be tested via the public
// API.
func TestInvalidReflectValue(t *testing.T) {
i := 1
// Dump invalid reflect value.
v := new(reflect.Value)
buf := new(bytes.Buffer)
d := dumpState{w: buf, cs: &Config}
d.dump(*v)
s := buf.String()
want := "<invalid>"
if s != want {
t.Errorf("InvalidReflectValue #%d\n got: %s want: %s", i, s, want)
}
i++
// Formatter invalid reflect value.
buf2 := new(dummyFmtState)
f := formatState{value: *v, cs: &Config, fs: buf2}
f.format(*v)
s = buf2.String()
want = "<invalid>"
if s != want {
t.Errorf("InvalidReflectValue #%d got: %s want: %s", i, s, want)
}
}
// SortValues makes the internal sortValues function available to the test
// package.
func SortValues(values []reflect.Value, cs *ConfigState) {
sortValues(values, cs)
}

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// Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
// NOTE: Due to the following build constraints, this file will only be compiled
// when the code is not running on Google App Engine, compiled by GopherJS, and
// "-tags safe" is not added to the go build command line. The "disableunsafe"
// tag is deprecated and thus should not be used.
// +build !js,!appengine,!safe,!disableunsafe
/*
This test file is part of the spew package rather than than the spew_test
package because it needs access to internals to properly test certain cases
which are not possible via the public interface since they should never happen.
*/
package spew
import (
"bytes"
"reflect"
"testing"
"unsafe"
)
// changeKind uses unsafe to intentionally change the kind of a reflect.Value to
// the maximum kind value which does not exist. This is needed to test the
// fallback code which punts to the standard fmt library for new types that
// might get added to the language.
func changeKind(v *reflect.Value, readOnly bool) {
rvf := (*uintptr)(unsafe.Pointer(uintptr(unsafe.Pointer(v)) + offsetFlag))
*rvf = *rvf | ((1<<flagKindWidth - 1) << flagKindShift)
if readOnly {
*rvf |= flagRO
} else {
*rvf &= ^uintptr(flagRO)
}
}
// TestAddedReflectValue tests functionaly of the dump and formatter code which
// falls back to the standard fmt library for new types that might get added to
// the language.
func TestAddedReflectValue(t *testing.T) {
i := 1
// Dump using a reflect.Value that is exported.
v := reflect.ValueOf(int8(5))
changeKind(&v, false)
buf := new(bytes.Buffer)
d := dumpState{w: buf, cs: &Config}
d.dump(v)
s := buf.String()
want := "(int8) 5"
if s != want {
t.Errorf("TestAddedReflectValue #%d\n got: %s want: %s", i, s, want)
}
i++
// Dump using a reflect.Value that is not exported.
changeKind(&v, true)
buf.Reset()
d.dump(v)
s = buf.String()
want = "(int8) <int8 Value>"
if s != want {
t.Errorf("TestAddedReflectValue #%d\n got: %s want: %s", i, s, want)
}
i++
// Formatter using a reflect.Value that is exported.
changeKind(&v, false)
buf2 := new(dummyFmtState)
f := formatState{value: v, cs: &Config, fs: buf2}
f.format(v)
s = buf2.String()
want = "5"
if s != want {
t.Errorf("TestAddedReflectValue #%d got: %s want: %s", i, s, want)
}
i++
// Formatter using a reflect.Value that is not exported.
changeKind(&v, true)
buf2.Reset()
f = formatState{value: v, cs: &Config, fs: buf2}
f.format(v)
s = buf2.String()
want = "<int8 Value>"
if s != want {
t.Errorf("TestAddedReflectValue #%d got: %s want: %s", i, s, want)
}
}

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/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package spew
import (
"fmt"
"io"
)
// Errorf is a wrapper for fmt.Errorf that treats each argument as if it were
// passed with a default Formatter interface returned by NewFormatter. It
// returns the formatted string as a value that satisfies error. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Errorf(format, spew.NewFormatter(a), spew.NewFormatter(b))
func Errorf(format string, a ...interface{}) (err error) {
return fmt.Errorf(format, convertArgs(a)...)
}
// Fprint is a wrapper for fmt.Fprint that treats each argument as if it were
// passed with a default Formatter interface returned by NewFormatter. It
// returns the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Fprint(w, spew.NewFormatter(a), spew.NewFormatter(b))
func Fprint(w io.Writer, a ...interface{}) (n int, err error) {
return fmt.Fprint(w, convertArgs(a)...)
}
// Fprintf is a wrapper for fmt.Fprintf that treats each argument as if it were
// passed with a default Formatter interface returned by NewFormatter. It
// returns the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Fprintf(w, format, spew.NewFormatter(a), spew.NewFormatter(b))
func Fprintf(w io.Writer, format string, a ...interface{}) (n int, err error) {
return fmt.Fprintf(w, format, convertArgs(a)...)
}
// Fprintln is a wrapper for fmt.Fprintln that treats each argument as if it
// passed with a default Formatter interface returned by NewFormatter. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Fprintln(w, spew.NewFormatter(a), spew.NewFormatter(b))
func Fprintln(w io.Writer, a ...interface{}) (n int, err error) {
return fmt.Fprintln(w, convertArgs(a)...)
}
// Print is a wrapper for fmt.Print that treats each argument as if it were
// passed with a default Formatter interface returned by NewFormatter. It
// returns the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Print(spew.NewFormatter(a), spew.NewFormatter(b))
func Print(a ...interface{}) (n int, err error) {
return fmt.Print(convertArgs(a)...)
}
// Printf is a wrapper for fmt.Printf that treats each argument as if it were
// passed with a default Formatter interface returned by NewFormatter. It
// returns the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Printf(format, spew.NewFormatter(a), spew.NewFormatter(b))
func Printf(format string, a ...interface{}) (n int, err error) {
return fmt.Printf(format, convertArgs(a)...)
}
// Println is a wrapper for fmt.Println that treats each argument as if it were
// passed with a default Formatter interface returned by NewFormatter. It
// returns the number of bytes written and any write error encountered. See
// NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Println(spew.NewFormatter(a), spew.NewFormatter(b))
func Println(a ...interface{}) (n int, err error) {
return fmt.Println(convertArgs(a)...)
}
// Sprint is a wrapper for fmt.Sprint that treats each argument as if it were
// passed with a default Formatter interface returned by NewFormatter. It
// returns the resulting string. See NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Sprint(spew.NewFormatter(a), spew.NewFormatter(b))
func Sprint(a ...interface{}) string {
return fmt.Sprint(convertArgs(a)...)
}
// Sprintf is a wrapper for fmt.Sprintf that treats each argument as if it were
// passed with a default Formatter interface returned by NewFormatter. It
// returns the resulting string. See NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Sprintf(format, spew.NewFormatter(a), spew.NewFormatter(b))
func Sprintf(format string, a ...interface{}) string {
return fmt.Sprintf(format, convertArgs(a)...)
}
// Sprintln is a wrapper for fmt.Sprintln that treats each argument as if it
// were passed with a default Formatter interface returned by NewFormatter. It
// returns the resulting string. See NewFormatter for formatting details.
//
// This function is shorthand for the following syntax:
//
// fmt.Sprintln(spew.NewFormatter(a), spew.NewFormatter(b))
func Sprintln(a ...interface{}) string {
return fmt.Sprintln(convertArgs(a)...)
}
// convertArgs accepts a slice of arguments and returns a slice of the same
// length with each argument converted to a default spew Formatter interface.
func convertArgs(args []interface{}) (formatters []interface{}) {
formatters = make([]interface{}, len(args))
for index, arg := range args {
formatters[index] = NewFormatter(arg)
}
return formatters
}

320
vendor/github.com/davecgh/go-spew/spew/spew_test.go generated vendored Normal file
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@ -0,0 +1,320 @@
/*
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package spew_test
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"testing"
"github.com/davecgh/go-spew/spew"
)
// spewFunc is used to identify which public function of the spew package or
// ConfigState a test applies to.
type spewFunc int
const (
fCSFdump spewFunc = iota
fCSFprint
fCSFprintf
fCSFprintln
fCSPrint
fCSPrintln
fCSSdump
fCSSprint
fCSSprintf
fCSSprintln
fCSErrorf
fCSNewFormatter
fErrorf
fFprint
fFprintln
fPrint
fPrintln
fSdump
fSprint
fSprintf
fSprintln
)
// Map of spewFunc values to names for pretty printing.
var spewFuncStrings = map[spewFunc]string{
fCSFdump: "ConfigState.Fdump",
fCSFprint: "ConfigState.Fprint",
fCSFprintf: "ConfigState.Fprintf",
fCSFprintln: "ConfigState.Fprintln",
fCSSdump: "ConfigState.Sdump",
fCSPrint: "ConfigState.Print",
fCSPrintln: "ConfigState.Println",
fCSSprint: "ConfigState.Sprint",
fCSSprintf: "ConfigState.Sprintf",
fCSSprintln: "ConfigState.Sprintln",
fCSErrorf: "ConfigState.Errorf",
fCSNewFormatter: "ConfigState.NewFormatter",
fErrorf: "spew.Errorf",
fFprint: "spew.Fprint",
fFprintln: "spew.Fprintln",
fPrint: "spew.Print",
fPrintln: "spew.Println",
fSdump: "spew.Sdump",
fSprint: "spew.Sprint",
fSprintf: "spew.Sprintf",
fSprintln: "spew.Sprintln",
}
func (f spewFunc) String() string {
if s, ok := spewFuncStrings[f]; ok {
return s
}
return fmt.Sprintf("Unknown spewFunc (%d)", int(f))
}
// spewTest is used to describe a test to be performed against the public
// functions of the spew package or ConfigState.
type spewTest struct {
cs *spew.ConfigState
f spewFunc
format string
in interface{}
want string
}
// spewTests houses the tests to be performed against the public functions of
// the spew package and ConfigState.
//
// These tests are only intended to ensure the public functions are exercised
// and are intentionally not exhaustive of types. The exhaustive type
// tests are handled in the dump and format tests.
var spewTests []spewTest
// redirStdout is a helper function to return the standard output from f as a
// byte slice.
func redirStdout(f func()) ([]byte, error) {
tempFile, err := ioutil.TempFile("", "ss-test")
if err != nil {
return nil, err
}
fileName := tempFile.Name()
defer os.Remove(fileName) // Ignore error
origStdout := os.Stdout
os.Stdout = tempFile
f()
os.Stdout = origStdout
tempFile.Close()
return ioutil.ReadFile(fileName)
}
func initSpewTests() {
// Config states with various settings.
scsDefault := spew.NewDefaultConfig()
scsNoMethods := &spew.ConfigState{Indent: " ", DisableMethods: true}
scsNoPmethods := &spew.ConfigState{Indent: " ", DisablePointerMethods: true}
scsMaxDepth := &spew.ConfigState{Indent: " ", MaxDepth: 1}
scsContinue := &spew.ConfigState{Indent: " ", ContinueOnMethod: true}
scsNoPtrAddr := &spew.ConfigState{DisablePointerAddresses: true}
scsNoCap := &spew.ConfigState{DisableCapacities: true}
// Variables for tests on types which implement Stringer interface with and
// without a pointer receiver.
ts := stringer("test")
tps := pstringer("test")
type ptrTester struct {
s *struct{}
}
tptr := &ptrTester{s: &struct{}{}}
// depthTester is used to test max depth handling for structs, array, slices
// and maps.
type depthTester struct {
ic indirCir1
arr [1]string
slice []string
m map[string]int
}
dt := depthTester{indirCir1{nil}, [1]string{"arr"}, []string{"slice"},
map[string]int{"one": 1}}
// Variable for tests on types which implement error interface.
te := customError(10)
spewTests = []spewTest{
{scsDefault, fCSFdump, "", int8(127), "(int8) 127\n"},
{scsDefault, fCSFprint, "", int16(32767), "32767"},
{scsDefault, fCSFprintf, "%v", int32(2147483647), "2147483647"},
{scsDefault, fCSFprintln, "", int(2147483647), "2147483647\n"},
{scsDefault, fCSPrint, "", int64(9223372036854775807), "9223372036854775807"},
{scsDefault, fCSPrintln, "", uint8(255), "255\n"},
{scsDefault, fCSSdump, "", uint8(64), "(uint8) 64\n"},
{scsDefault, fCSSprint, "", complex(1, 2), "(1+2i)"},
{scsDefault, fCSSprintf, "%v", complex(float32(3), 4), "(3+4i)"},
{scsDefault, fCSSprintln, "", complex(float64(5), 6), "(5+6i)\n"},
{scsDefault, fCSErrorf, "%#v", uint16(65535), "(uint16)65535"},
{scsDefault, fCSNewFormatter, "%v", uint32(4294967295), "4294967295"},
{scsDefault, fErrorf, "%v", uint64(18446744073709551615), "18446744073709551615"},
{scsDefault, fFprint, "", float32(3.14), "3.14"},
{scsDefault, fFprintln, "", float64(6.28), "6.28\n"},
{scsDefault, fPrint, "", true, "true"},
{scsDefault, fPrintln, "", false, "false\n"},
{scsDefault, fSdump, "", complex(-10, -20), "(complex128) (-10-20i)\n"},
{scsDefault, fSprint, "", complex(-1, -2), "(-1-2i)"},
{scsDefault, fSprintf, "%v", complex(float32(-3), -4), "(-3-4i)"},
{scsDefault, fSprintln, "", complex(float64(-5), -6), "(-5-6i)\n"},
{scsNoMethods, fCSFprint, "", ts, "test"},
{scsNoMethods, fCSFprint, "", &ts, "<*>test"},
{scsNoMethods, fCSFprint, "", tps, "test"},
{scsNoMethods, fCSFprint, "", &tps, "<*>test"},
{scsNoPmethods, fCSFprint, "", ts, "stringer test"},
{scsNoPmethods, fCSFprint, "", &ts, "<*>stringer test"},
{scsNoPmethods, fCSFprint, "", tps, "test"},
{scsNoPmethods, fCSFprint, "", &tps, "<*>stringer test"},
{scsMaxDepth, fCSFprint, "", dt, "{{<max>} [<max>] [<max>] map[<max>]}"},
{scsMaxDepth, fCSFdump, "", dt, "(spew_test.depthTester) {\n" +
" ic: (spew_test.indirCir1) {\n <max depth reached>\n },\n" +
" arr: ([1]string) (len=1 cap=1) {\n <max depth reached>\n },\n" +
" slice: ([]string) (len=1 cap=1) {\n <max depth reached>\n },\n" +
" m: (map[string]int) (len=1) {\n <max depth reached>\n }\n}\n"},
{scsContinue, fCSFprint, "", ts, "(stringer test) test"},
{scsContinue, fCSFdump, "", ts, "(spew_test.stringer) " +
"(len=4) (stringer test) \"test\"\n"},
{scsContinue, fCSFprint, "", te, "(error: 10) 10"},
{scsContinue, fCSFdump, "", te, "(spew_test.customError) " +
"(error: 10) 10\n"},
{scsNoPtrAddr, fCSFprint, "", tptr, "<*>{<*>{}}"},
{scsNoPtrAddr, fCSSdump, "", tptr, "(*spew_test.ptrTester)({\ns: (*struct {})({\n})\n})\n"},
{scsNoCap, fCSSdump, "", make([]string, 0, 10), "([]string) {\n}\n"},
{scsNoCap, fCSSdump, "", make([]string, 1, 10), "([]string) (len=1) {\n(string) \"\"\n}\n"},
}
}
// TestSpew executes all of the tests described by spewTests.
func TestSpew(t *testing.T) {
initSpewTests()
t.Logf("Running %d tests", len(spewTests))
for i, test := range spewTests {
buf := new(bytes.Buffer)
switch test.f {
case fCSFdump:
test.cs.Fdump(buf, test.in)
case fCSFprint:
test.cs.Fprint(buf, test.in)
case fCSFprintf:
test.cs.Fprintf(buf, test.format, test.in)
case fCSFprintln:
test.cs.Fprintln(buf, test.in)
case fCSPrint:
b, err := redirStdout(func() { test.cs.Print(test.in) })
if err != nil {
t.Errorf("%v #%d %v", test.f, i, err)
continue
}
buf.Write(b)
case fCSPrintln:
b, err := redirStdout(func() { test.cs.Println(test.in) })
if err != nil {
t.Errorf("%v #%d %v", test.f, i, err)
continue
}
buf.Write(b)
case fCSSdump:
str := test.cs.Sdump(test.in)
buf.WriteString(str)
case fCSSprint:
str := test.cs.Sprint(test.in)
buf.WriteString(str)
case fCSSprintf:
str := test.cs.Sprintf(test.format, test.in)
buf.WriteString(str)
case fCSSprintln:
str := test.cs.Sprintln(test.in)
buf.WriteString(str)
case fCSErrorf:
err := test.cs.Errorf(test.format, test.in)
buf.WriteString(err.Error())
case fCSNewFormatter:
fmt.Fprintf(buf, test.format, test.cs.NewFormatter(test.in))
case fErrorf:
err := spew.Errorf(test.format, test.in)
buf.WriteString(err.Error())
case fFprint:
spew.Fprint(buf, test.in)
case fFprintln:
spew.Fprintln(buf, test.in)
case fPrint:
b, err := redirStdout(func() { spew.Print(test.in) })
if err != nil {
t.Errorf("%v #%d %v", test.f, i, err)
continue
}
buf.Write(b)
case fPrintln:
b, err := redirStdout(func() { spew.Println(test.in) })
if err != nil {
t.Errorf("%v #%d %v", test.f, i, err)
continue
}
buf.Write(b)
case fSdump:
str := spew.Sdump(test.in)
buf.WriteString(str)
case fSprint:
str := spew.Sprint(test.in)
buf.WriteString(str)
case fSprintf:
str := spew.Sprintf(test.format, test.in)
buf.WriteString(str)
case fSprintln:
str := spew.Sprintln(test.in)
buf.WriteString(str)
default:
t.Errorf("%v #%d unrecognized function", test.f, i)
continue
}
s := buf.String()
if test.want != s {
t.Errorf("ConfigState #%d\n got: %s want: %s", i, s, test.want)
continue
}
}
}

82
vendor/github.com/davecgh/go-spew/spew/testdata/dumpcgo.go generated vendored Normal file
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// Copyright (c) 2013 Dave Collins <dave@davec.name>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
// NOTE: Due to the following build constraints, this file will only be compiled
// when both cgo is supported and "-tags testcgo" is added to the go test
// command line. This code should really only be in the dumpcgo_test.go file,
// but unfortunately Go will not allow cgo in test files, so this is a
// workaround to allow cgo types to be tested. This configuration is used
// because spew itself does not require cgo to run even though it does handle
// certain cgo types specially. Rather than forcing all clients to require cgo
// and an external C compiler just to run the tests, this scheme makes them
// optional.
// +build cgo,testcgo
package testdata
/*
#include <stdint.h>
typedef unsigned char custom_uchar_t;
char *ncp = 0;
char *cp = "test";
char ca[6] = {'t', 'e', 's', 't', '2', '\0'};
unsigned char uca[6] = {'t', 'e', 's', 't', '3', '\0'};
signed char sca[6] = {'t', 'e', 's', 't', '4', '\0'};
uint8_t ui8ta[6] = {'t', 'e', 's', 't', '5', '\0'};
custom_uchar_t tuca[6] = {'t', 'e', 's', 't', '6', '\0'};
*/
import "C"
// GetCgoNullCharPointer returns a null char pointer via cgo. This is only
// used for tests.
func GetCgoNullCharPointer() interface{} {
return C.ncp
}
// GetCgoCharPointer returns a char pointer via cgo. This is only used for
// tests.
func GetCgoCharPointer() interface{} {
return C.cp
}
// GetCgoCharArray returns a char array via cgo and the array's len and cap.
// This is only used for tests.
func GetCgoCharArray() (interface{}, int, int) {
return C.ca, len(C.ca), cap(C.ca)
}
// GetCgoUnsignedCharArray returns an unsigned char array via cgo and the
// array's len and cap. This is only used for tests.
func GetCgoUnsignedCharArray() (interface{}, int, int) {
return C.uca, len(C.uca), cap(C.uca)
}
// GetCgoSignedCharArray returns a signed char array via cgo and the array's len
// and cap. This is only used for tests.
func GetCgoSignedCharArray() (interface{}, int, int) {
return C.sca, len(C.sca), cap(C.sca)
}
// GetCgoUint8tArray returns a uint8_t array via cgo and the array's len and
// cap. This is only used for tests.
func GetCgoUint8tArray() (interface{}, int, int) {
return C.ui8ta, len(C.ui8ta), cap(C.ui8ta)
}
// GetCgoTypdefedUnsignedCharArray returns a typedefed unsigned char array via
// cgo and the array's len and cap. This is only used for tests.
func GetCgoTypdefedUnsignedCharArray() (interface{}, int, int) {
return C.tuca, len(C.tuca), cap(C.tuca)
}

61
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github.com/davecgh/go-spew/spew/dump.go dumpState.dump 100.00% (88/88)
github.com/davecgh/go-spew/spew/format.go formatState.format 100.00% (82/82)
github.com/davecgh/go-spew/spew/format.go formatState.formatPtr 100.00% (52/52)
github.com/davecgh/go-spew/spew/dump.go dumpState.dumpPtr 100.00% (44/44)
github.com/davecgh/go-spew/spew/dump.go dumpState.dumpSlice 100.00% (39/39)
github.com/davecgh/go-spew/spew/common.go handleMethods 100.00% (30/30)
github.com/davecgh/go-spew/spew/common.go printHexPtr 100.00% (18/18)
github.com/davecgh/go-spew/spew/common.go unsafeReflectValue 100.00% (13/13)
github.com/davecgh/go-spew/spew/format.go formatState.constructOrigFormat 100.00% (12/12)
github.com/davecgh/go-spew/spew/dump.go fdump 100.00% (11/11)
github.com/davecgh/go-spew/spew/format.go formatState.Format 100.00% (11/11)
github.com/davecgh/go-spew/spew/common.go init 100.00% (10/10)
github.com/davecgh/go-spew/spew/common.go printComplex 100.00% (9/9)
github.com/davecgh/go-spew/spew/common.go valuesSorter.Less 100.00% (8/8)
github.com/davecgh/go-spew/spew/format.go formatState.buildDefaultFormat 100.00% (7/7)
github.com/davecgh/go-spew/spew/format.go formatState.unpackValue 100.00% (5/5)
github.com/davecgh/go-spew/spew/dump.go dumpState.indent 100.00% (4/4)
github.com/davecgh/go-spew/spew/common.go catchPanic 100.00% (4/4)
github.com/davecgh/go-spew/spew/config.go ConfigState.convertArgs 100.00% (4/4)
github.com/davecgh/go-spew/spew/spew.go convertArgs 100.00% (4/4)
github.com/davecgh/go-spew/spew/format.go newFormatter 100.00% (3/3)
github.com/davecgh/go-spew/spew/dump.go Sdump 100.00% (3/3)
github.com/davecgh/go-spew/spew/common.go printBool 100.00% (3/3)
github.com/davecgh/go-spew/spew/common.go sortValues 100.00% (3/3)
github.com/davecgh/go-spew/spew/config.go ConfigState.Sdump 100.00% (3/3)
github.com/davecgh/go-spew/spew/dump.go dumpState.unpackValue 100.00% (3/3)
github.com/davecgh/go-spew/spew/spew.go Printf 100.00% (1/1)
github.com/davecgh/go-spew/spew/spew.go Println 100.00% (1/1)
github.com/davecgh/go-spew/spew/spew.go Sprint 100.00% (1/1)
github.com/davecgh/go-spew/spew/spew.go Sprintf 100.00% (1/1)
github.com/davecgh/go-spew/spew/spew.go Sprintln 100.00% (1/1)
github.com/davecgh/go-spew/spew/common.go printFloat 100.00% (1/1)
github.com/davecgh/go-spew/spew/config.go NewDefaultConfig 100.00% (1/1)
github.com/davecgh/go-spew/spew/common.go printInt 100.00% (1/1)
github.com/davecgh/go-spew/spew/common.go printUint 100.00% (1/1)
github.com/davecgh/go-spew/spew/common.go valuesSorter.Len 100.00% (1/1)
github.com/davecgh/go-spew/spew/common.go valuesSorter.Swap 100.00% (1/1)
github.com/davecgh/go-spew/spew/config.go ConfigState.Errorf 100.00% (1/1)
github.com/davecgh/go-spew/spew/config.go ConfigState.Fprint 100.00% (1/1)
github.com/davecgh/go-spew/spew/config.go ConfigState.Fprintf 100.00% (1/1)
github.com/davecgh/go-spew/spew/config.go ConfigState.Fprintln 100.00% (1/1)
github.com/davecgh/go-spew/spew/config.go ConfigState.Print 100.00% (1/1)
github.com/davecgh/go-spew/spew/config.go ConfigState.Printf 100.00% (1/1)
github.com/davecgh/go-spew/spew/config.go ConfigState.Println 100.00% (1/1)
github.com/davecgh/go-spew/spew/config.go ConfigState.Sprint 100.00% (1/1)
github.com/davecgh/go-spew/spew/config.go ConfigState.Sprintf 100.00% (1/1)
github.com/davecgh/go-spew/spew/config.go ConfigState.Sprintln 100.00% (1/1)
github.com/davecgh/go-spew/spew/config.go ConfigState.NewFormatter 100.00% (1/1)
github.com/davecgh/go-spew/spew/config.go ConfigState.Fdump 100.00% (1/1)
github.com/davecgh/go-spew/spew/config.go ConfigState.Dump 100.00% (1/1)
github.com/davecgh/go-spew/spew/dump.go Fdump 100.00% (1/1)
github.com/davecgh/go-spew/spew/dump.go Dump 100.00% (1/1)
github.com/davecgh/go-spew/spew/spew.go Fprintln 100.00% (1/1)
github.com/davecgh/go-spew/spew/format.go NewFormatter 100.00% (1/1)
github.com/davecgh/go-spew/spew/spew.go Errorf 100.00% (1/1)
github.com/davecgh/go-spew/spew/spew.go Fprint 100.00% (1/1)
github.com/davecgh/go-spew/spew/spew.go Fprintf 100.00% (1/1)
github.com/davecgh/go-spew/spew/spew.go Print 100.00% (1/1)
github.com/davecgh/go-spew/spew ------------------------------- 100.00% (505/505)

19
vendor/github.com/gorilla/context/.travis.yml generated vendored Normal file
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language: go
sudo: false
matrix:
include:
- go: 1.3
- go: 1.4
- go: 1.5
- go: 1.6
- go: tip
install:
- go get golang.org/x/tools/cmd/vet
script:
- go get -t -v ./...
- diff -u <(echo -n) <(gofmt -d .)
- go tool vet .
- go test -v -race ./...

27
vendor/github.com/gorilla/context/LICENSE generated vendored Normal file
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@ -0,0 +1,27 @@
Copyright (c) 2012 Rodrigo Moraes. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

7
vendor/github.com/gorilla/context/README.md generated vendored Normal file
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context
=======
[![Build Status](https://travis-ci.org/gorilla/context.png?branch=master)](https://travis-ci.org/gorilla/context)
gorilla/context is a general purpose registry for global request variables.
Read the full documentation here: http://www.gorillatoolkit.org/pkg/context

143
vendor/github.com/gorilla/context/context.go generated vendored Normal file
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// Copyright 2012 The Gorilla Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package context
import (
"net/http"
"sync"
"time"
)
var (
mutex sync.RWMutex
data = make(map[*http.Request]map[interface{}]interface{})
datat = make(map[*http.Request]int64)
)
// Set stores a value for a given key in a given request.
func Set(r *http.Request, key, val interface{}) {
mutex.Lock()
if data[r] == nil {
data[r] = make(map[interface{}]interface{})
datat[r] = time.Now().Unix()
}
data[r][key] = val
mutex.Unlock()
}
// Get returns a value stored for a given key in a given request.
func Get(r *http.Request, key interface{}) interface{} {
mutex.RLock()
if ctx := data[r]; ctx != nil {
value := ctx[key]
mutex.RUnlock()
return value
}
mutex.RUnlock()
return nil
}
// GetOk returns stored value and presence state like multi-value return of map access.
func GetOk(r *http.Request, key interface{}) (interface{}, bool) {
mutex.RLock()
if _, ok := data[r]; ok {
value, ok := data[r][key]
mutex.RUnlock()
return value, ok
}
mutex.RUnlock()
return nil, false
}
// GetAll returns all stored values for the request as a map. Nil is returned for invalid requests.
func GetAll(r *http.Request) map[interface{}]interface{} {
mutex.RLock()
if context, ok := data[r]; ok {
result := make(map[interface{}]interface{}, len(context))
for k, v := range context {
result[k] = v
}
mutex.RUnlock()
return result
}
mutex.RUnlock()
return nil
}
// GetAllOk returns all stored values for the request as a map and a boolean value that indicates if
// the request was registered.
func GetAllOk(r *http.Request) (map[interface{}]interface{}, bool) {
mutex.RLock()
context, ok := data[r]
result := make(map[interface{}]interface{}, len(context))
for k, v := range context {
result[k] = v
}
mutex.RUnlock()
return result, ok
}
// Delete removes a value stored for a given key in a given request.
func Delete(r *http.Request, key interface{}) {
mutex.Lock()
if data[r] != nil {
delete(data[r], key)
}
mutex.Unlock()
}
// Clear removes all values stored for a given request.
//
// This is usually called by a handler wrapper to clean up request
// variables at the end of a request lifetime. See ClearHandler().
func Clear(r *http.Request) {
mutex.Lock()
clear(r)
mutex.Unlock()
}
// clear is Clear without the lock.
func clear(r *http.Request) {
delete(data, r)
delete(datat, r)
}
// Purge removes request data stored for longer than maxAge, in seconds.
// It returns the amount of requests removed.
//
// If maxAge <= 0, all request data is removed.
//
// This is only used for sanity check: in case context cleaning was not
// properly set some request data can be kept forever, consuming an increasing
// amount of memory. In case this is detected, Purge() must be called
// periodically until the problem is fixed.
func Purge(maxAge int) int {
mutex.Lock()
count := 0
if maxAge <= 0 {
count = len(data)
data = make(map[*http.Request]map[interface{}]interface{})
datat = make(map[*http.Request]int64)
} else {
min := time.Now().Unix() - int64(maxAge)
for r := range data {
if datat[r] < min {
clear(r)
count++
}
}
}
mutex.Unlock()
return count
}
// ClearHandler wraps an http.Handler and clears request values at the end
// of a request lifetime.
func ClearHandler(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
defer Clear(r)
h.ServeHTTP(w, r)
})
}

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// Copyright 2012 The Gorilla Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package context
import (
"net/http"
"testing"
)
type keyType int
const (
key1 keyType = iota
key2
)
func TestContext(t *testing.T) {
assertEqual := func(val interface{}, exp interface{}) {
if val != exp {
t.Errorf("Expected %v, got %v.", exp, val)
}
}
r, _ := http.NewRequest("GET", "http://localhost:8080/", nil)
emptyR, _ := http.NewRequest("GET", "http://localhost:8080/", nil)
// Get()
assertEqual(Get(r, key1), nil)
// Set()
Set(r, key1, "1")
assertEqual(Get(r, key1), "1")
assertEqual(len(data[r]), 1)
Set(r, key2, "2")
assertEqual(Get(r, key2), "2")
assertEqual(len(data[r]), 2)
//GetOk
value, ok := GetOk(r, key1)
assertEqual(value, "1")
assertEqual(ok, true)
value, ok = GetOk(r, "not exists")
assertEqual(value, nil)
assertEqual(ok, false)
Set(r, "nil value", nil)
value, ok = GetOk(r, "nil value")
assertEqual(value, nil)
assertEqual(ok, true)
// GetAll()
values := GetAll(r)
assertEqual(len(values), 3)
// GetAll() for empty request
values = GetAll(emptyR)
if values != nil {
t.Error("GetAll didn't return nil value for invalid request")
}
// GetAllOk()
values, ok = GetAllOk(r)
assertEqual(len(values), 3)
assertEqual(ok, true)
// GetAllOk() for empty request
values, ok = GetAllOk(emptyR)
assertEqual(value, nil)
assertEqual(ok, false)
// Delete()
Delete(r, key1)
assertEqual(Get(r, key1), nil)
assertEqual(len(data[r]), 2)
Delete(r, key2)
assertEqual(Get(r, key2), nil)
assertEqual(len(data[r]), 1)
// Clear()
Clear(r)
assertEqual(len(data), 0)
}
func parallelReader(r *http.Request, key string, iterations int, wait, done chan struct{}) {
<-wait
for i := 0; i < iterations; i++ {
Get(r, key)
}
done <- struct{}{}
}
func parallelWriter(r *http.Request, key, value string, iterations int, wait, done chan struct{}) {
<-wait
for i := 0; i < iterations; i++ {
Set(r, key, value)
}
done <- struct{}{}
}
func benchmarkMutex(b *testing.B, numReaders, numWriters, iterations int) {
b.StopTimer()
r, _ := http.NewRequest("GET", "http://localhost:8080/", nil)
done := make(chan struct{})
b.StartTimer()
for i := 0; i < b.N; i++ {
wait := make(chan struct{})
for i := 0; i < numReaders; i++ {
go parallelReader(r, "test", iterations, wait, done)
}
for i := 0; i < numWriters; i++ {
go parallelWriter(r, "test", "123", iterations, wait, done)
}
close(wait)
for i := 0; i < numReaders+numWriters; i++ {
<-done
}
}
}
func BenchmarkMutexSameReadWrite1(b *testing.B) {
benchmarkMutex(b, 1, 1, 32)
}
func BenchmarkMutexSameReadWrite2(b *testing.B) {
benchmarkMutex(b, 2, 2, 32)
}
func BenchmarkMutexSameReadWrite4(b *testing.B) {
benchmarkMutex(b, 4, 4, 32)
}
func BenchmarkMutex1(b *testing.B) {
benchmarkMutex(b, 2, 8, 32)
}
func BenchmarkMutex2(b *testing.B) {
benchmarkMutex(b, 16, 4, 64)
}
func BenchmarkMutex3(b *testing.B) {
benchmarkMutex(b, 1, 2, 128)
}
func BenchmarkMutex4(b *testing.B) {
benchmarkMutex(b, 128, 32, 256)
}
func BenchmarkMutex5(b *testing.B) {
benchmarkMutex(b, 1024, 2048, 64)
}
func BenchmarkMutex6(b *testing.B) {
benchmarkMutex(b, 2048, 1024, 512)
}

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// Copyright 2012 The Gorilla Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
/*
Package context stores values shared during a request lifetime.
For example, a router can set variables extracted from the URL and later
application handlers can access those values, or it can be used to store
sessions values to be saved at the end of a request. There are several
others common uses.
The idea was posted by Brad Fitzpatrick to the go-nuts mailing list:
http://groups.google.com/group/golang-nuts/msg/e2d679d303aa5d53
Here's the basic usage: first define the keys that you will need. The key
type is interface{} so a key can be of any type that supports equality.
Here we define a key using a custom int type to avoid name collisions:
package foo
import (
"github.com/gorilla/context"
)
type key int
const MyKey key = 0
Then set a variable. Variables are bound to an http.Request object, so you
need a request instance to set a value:
context.Set(r, MyKey, "bar")
The application can later access the variable using the same key you provided:
func MyHandler(w http.ResponseWriter, r *http.Request) {
// val is "bar".
val := context.Get(r, foo.MyKey)
// returns ("bar", true)
val, ok := context.GetOk(r, foo.MyKey)
// ...
}
And that's all about the basic usage. We discuss some other ideas below.
Any type can be stored in the context. To enforce a given type, make the key
private and wrap Get() and Set() to accept and return values of a specific
type:
type key int
const mykey key = 0
// GetMyKey returns a value for this package from the request values.
func GetMyKey(r *http.Request) SomeType {
if rv := context.Get(r, mykey); rv != nil {
return rv.(SomeType)
}
return nil
}
// SetMyKey sets a value for this package in the request values.
func SetMyKey(r *http.Request, val SomeType) {
context.Set(r, mykey, val)
}
Variables must be cleared at the end of a request, to remove all values
that were stored. This can be done in an http.Handler, after a request was
served. Just call Clear() passing the request:
context.Clear(r)
...or use ClearHandler(), which conveniently wraps an http.Handler to clear
variables at the end of a request lifetime.
The Routers from the packages gorilla/mux and gorilla/pat call Clear()
so if you are using either of them you don't need to clear the context manually.
*/
package context

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language: go
sudo: false
matrix:
include:
- go: 1.2
- go: 1.3
- go: 1.4
- go: 1.5
- go: 1.6
- go: 1.7
- go: tip
install:
- # Skip
script:
- go get -t -v ./...
- diff -u <(echo -n) <(gofmt -d .)
- go tool vet .
- go test -v -race ./...

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Copyright (c) 2012 Rodrigo Moraes. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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gorilla/mux
===
[![GoDoc](https://godoc.org/github.com/gorilla/mux?status.svg)](https://godoc.org/github.com/gorilla/mux)
[![Build Status](https://travis-ci.org/gorilla/mux.svg?branch=master)](https://travis-ci.org/gorilla/mux)
![Gorilla Logo](http://www.gorillatoolkit.org/static/images/gorilla-icon-64.png)
http://www.gorillatoolkit.org/pkg/mux
Package `gorilla/mux` implements a request router and dispatcher for matching incoming requests to
their respective handler.
The name mux stands for "HTTP request multiplexer". Like the standard `http.ServeMux`, `mux.Router` matches incoming requests against a list of registered routes and calls a handler for the route that matches the URL or other conditions. The main features are:
* It implements the `http.Handler` interface so it is compatible with the standard `http.ServeMux`.
* Requests can be matched based on URL host, path, path prefix, schemes, header and query values, HTTP methods or using custom matchers.
* URL hosts and paths can have variables with an optional regular expression.
* Registered URLs can be built, or "reversed", which helps maintaining references to resources.
* Routes can be used as subrouters: nested routes are only tested if the parent route matches. This is useful to define groups of routes that share common conditions like a host, a path prefix or other repeated attributes. As a bonus, this optimizes request matching.
---
* [Install](#install)
* [Examples](#examples)
* [Matching Routes](#matching-routes)
* [Listing Routes](#listing-routes)
* [Static Files](#static-files)
* [Registered URLs](#registered-urls)
* [Full Example](#full-example)
---
## Install
With a [correctly configured](https://golang.org/doc/install#testing) Go toolchain:
```sh
go get -u github.com/gorilla/mux
```
## Examples
Let's start registering a couple of URL paths and handlers:
```go
func main() {
r := mux.NewRouter()
r.HandleFunc("/", HomeHandler)
r.HandleFunc("/products", ProductsHandler)
r.HandleFunc("/articles", ArticlesHandler)
http.Handle("/", r)
}
```
Here we register three routes mapping URL paths to handlers. This is equivalent to how `http.HandleFunc()` works: if an incoming request URL matches one of the paths, the corresponding handler is called passing (`http.ResponseWriter`, `*http.Request`) as parameters.
Paths can have variables. They are defined using the format `{name}` or `{name:pattern}`. If a regular expression pattern is not defined, the matched variable will be anything until the next slash. For example:
```go
r := mux.NewRouter()
r.HandleFunc("/products/{key}", ProductHandler)
r.HandleFunc("/articles/{category}/", ArticlesCategoryHandler)
r.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler)
```
The names are used to create a map of route variables which can be retrieved calling `mux.Vars()`:
```go
func ArticlesCategoryHandler(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
w.WriteHeader(http.StatusOK)
fmt.Fprintf(w, "Category: %v\n", vars["category"])
}
```
And this is all you need to know about the basic usage. More advanced options are explained below.
### Matching Routes
Routes can also be restricted to a domain or subdomain. Just define a host pattern to be matched. They can also have variables:
```go
r := mux.NewRouter()
// Only matches if domain is "www.example.com".
r.Host("www.example.com")
// Matches a dynamic subdomain.
r.Host("{subdomain:[a-z]+}.domain.com")
```
There are several other matchers that can be added. To match path prefixes:
```go
r.PathPrefix("/products/")
```
...or HTTP methods:
```go
r.Methods("GET", "POST")
```
...or URL schemes:
```go
r.Schemes("https")
```
...or header values:
```go
r.Headers("X-Requested-With", "XMLHttpRequest")
```
...or query values:
```go
r.Queries("key", "value")
```
...or to use a custom matcher function:
```go
r.MatcherFunc(func(r *http.Request, rm *RouteMatch) bool {
return r.ProtoMajor == 0
})
```
...and finally, it is possible to combine several matchers in a single route:
```go
r.HandleFunc("/products", ProductsHandler).
Host("www.example.com").
Methods("GET").
Schemes("http")
```
Setting the same matching conditions again and again can be boring, so we have a way to group several routes that share the same requirements. We call it "subrouting".
For example, let's say we have several URLs that should only match when the host is `www.example.com`. Create a route for that host and get a "subrouter" from it:
```go
r := mux.NewRouter()
s := r.Host("www.example.com").Subrouter()
```
Then register routes in the subrouter:
```go
s.HandleFunc("/products/", ProductsHandler)
s.HandleFunc("/products/{key}", ProductHandler)
s.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler)
```
The three URL paths we registered above will only be tested if the domain is `www.example.com`, because the subrouter is tested first. This is not only convenient, but also optimizes request matching. You can create subrouters combining any attribute matchers accepted by a route.
Subrouters can be used to create domain or path "namespaces": you define subrouters in a central place and then parts of the app can register its paths relatively to a given subrouter.
There's one more thing about subroutes. When a subrouter has a path prefix, the inner routes use it as base for their paths:
```go
r := mux.NewRouter()
s := r.PathPrefix("/products").Subrouter()
// "/products/"
s.HandleFunc("/", ProductsHandler)
// "/products/{key}/"
s.HandleFunc("/{key}/", ProductHandler)
// "/products/{key}/details"
s.HandleFunc("/{key}/details", ProductDetailsHandler)
```
### Listing Routes
Routes on a mux can be listed using the Router.Walk method—useful for generating documentation:
```go
package main
import (
"fmt"
"net/http"
"github.com/gorilla/mux"
)
func handler(w http.ResponseWriter, r *http.Request) {
return
}
func main() {
r := mux.NewRouter()
r.HandleFunc("/", handler)
r.HandleFunc("/products", handler)
r.HandleFunc("/articles", handler)
r.HandleFunc("/articles/{id}", handler)
r.Walk(func(route *mux.Route, router *mux.Router, ancestors []*mux.Route) error {
t, err := route.GetPathTemplate()
if err != nil {
return err
}
fmt.Println(t)
return nil
})
http.Handle("/", r)
}
```
### Static Files
Note that the path provided to `PathPrefix()` represents a "wildcard": calling
`PathPrefix("/static/").Handler(...)` means that the handler will be passed any
request that matches "/static/*". This makes it easy to serve static files with mux:
```go
func main() {
var dir string
flag.StringVar(&dir, "dir", ".", "the directory to serve files from. Defaults to the current dir")
flag.Parse()
r := mux.NewRouter()
// This will serve files under http://localhost:8000/static/<filename>
r.PathPrefix("/static/").Handler(http.StripPrefix("/static/", http.FileServer(http.Dir(dir))))
srv := &http.Server{
Handler: r,
Addr: "127.0.0.1:8000",
// Good practice: enforce timeouts for servers you create!
WriteTimeout: 15 * time.Second,
ReadTimeout: 15 * time.Second,
}
log.Fatal(srv.ListenAndServe())
}
```
### Registered URLs
Now let's see how to build registered URLs.
Routes can be named. All routes that define a name can have their URLs built, or "reversed". We define a name calling `Name()` on a route. For example:
```go
r := mux.NewRouter()
r.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler).
Name("article")
```
To build a URL, get the route and call the `URL()` method, passing a sequence of key/value pairs for the route variables. For the previous route, we would do:
```go
url, err := r.Get("article").URL("category", "technology", "id", "42")
```
...and the result will be a `url.URL` with the following path:
```
"/articles/technology/42"
```
This also works for host variables:
```go
r := mux.NewRouter()
r.Host("{subdomain}.domain.com").
Path("/articles/{category}/{id:[0-9]+}").
HandlerFunc(ArticleHandler).
Name("article")
// url.String() will be "http://news.domain.com/articles/technology/42"
url, err := r.Get("article").URL("subdomain", "news",
"category", "technology",
"id", "42")
```
All variables defined in the route are required, and their values must conform to the corresponding patterns. These requirements guarantee that a generated URL will always match a registered route -- the only exception is for explicitly defined "build-only" routes which never match.
Regex support also exists for matching Headers within a route. For example, we could do:
```go
r.HeadersRegexp("Content-Type", "application/(text|json)")
```
...and the route will match both requests with a Content-Type of `application/json` as well as `application/text`
There's also a way to build only the URL host or path for a route: use the methods `URLHost()` or `URLPath()` instead. For the previous route, we would do:
```go
// "http://news.domain.com/"
host, err := r.Get("article").URLHost("subdomain", "news")
// "/articles/technology/42"
path, err := r.Get("article").URLPath("category", "technology", "id", "42")
```
And if you use subrouters, host and path defined separately can be built as well:
```go
r := mux.NewRouter()
s := r.Host("{subdomain}.domain.com").Subrouter()
s.Path("/articles/{category}/{id:[0-9]+}").
HandlerFunc(ArticleHandler).
Name("article")
// "http://news.domain.com/articles/technology/42"
url, err := r.Get("article").URL("subdomain", "news",
"category", "technology",
"id", "42")
```
## Full Example
Here's a complete, runnable example of a small `mux` based server:
```go
package main
import (
"net/http"
"log"
"github.com/gorilla/mux"
)
func YourHandler(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("Gorilla!\n"))
}
func main() {
r := mux.NewRouter()
// Routes consist of a path and a handler function.
r.HandleFunc("/", YourHandler)
// Bind to a port and pass our router in
log.Fatal(http.ListenAndServe(":8000", r))
}
```
## License
BSD licensed. See the LICENSE file for details.

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// Copyright 2012 The Gorilla Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package mux
import (
"net/http"
"net/http/httptest"
"testing"
)
func BenchmarkMux(b *testing.B) {
router := new(Router)
handler := func(w http.ResponseWriter, r *http.Request) {}
router.HandleFunc("/v1/{v1}", handler)
request, _ := http.NewRequest("GET", "/v1/anything", nil)
for i := 0; i < b.N; i++ {
router.ServeHTTP(nil, request)
}
}
func BenchmarkMuxAlternativeInRegexp(b *testing.B) {
router := new(Router)
handler := func(w http.ResponseWriter, r *http.Request) {}
router.HandleFunc("/v1/{v1:(a|b)}", handler)
requestA, _ := http.NewRequest("GET", "/v1/a", nil)
requestB, _ := http.NewRequest("GET", "/v1/b", nil)
for i := 0; i < b.N; i++ {
router.ServeHTTP(nil, requestA)
router.ServeHTTP(nil, requestB)
}
}
func BenchmarkManyPathVariables(b *testing.B) {
router := new(Router)
handler := func(w http.ResponseWriter, r *http.Request) {}
router.HandleFunc("/v1/{v1}/{v2}/{v3}/{v4}/{v5}", handler)
matchingRequest, _ := http.NewRequest("GET", "/v1/1/2/3/4/5", nil)
notMatchingRequest, _ := http.NewRequest("GET", "/v1/1/2/3/4", nil)
recorder := httptest.NewRecorder()
for i := 0; i < b.N; i++ {
router.ServeHTTP(nil, matchingRequest)
router.ServeHTTP(recorder, notMatchingRequest)
}
}

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// +build !go1.7
package mux
import (
"net/http"
"github.com/gorilla/context"
)
func contextGet(r *http.Request, key interface{}) interface{} {
return context.Get(r, key)
}
func contextSet(r *http.Request, key, val interface{}) *http.Request {
if val == nil {
return r
}
context.Set(r, key, val)
return r
}
func contextClear(r *http.Request) {
context.Clear(r)
}

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// +build !go1.7
package mux
import (
"net/http"
"testing"
"github.com/gorilla/context"
)
// Tests that the context is cleared or not cleared properly depending on
// the configuration of the router
func TestKeepContext(t *testing.T) {
func1 := func(w http.ResponseWriter, r *http.Request) {}
r := NewRouter()
r.HandleFunc("/", func1).Name("func1")
req, _ := http.NewRequest("GET", "http://localhost/", nil)
context.Set(req, "t", 1)
res := new(http.ResponseWriter)
r.ServeHTTP(*res, req)
if _, ok := context.GetOk(req, "t"); ok {
t.Error("Context should have been cleared at end of request")
}
r.KeepContext = true
req, _ = http.NewRequest("GET", "http://localhost/", nil)
context.Set(req, "t", 1)
r.ServeHTTP(*res, req)
if _, ok := context.GetOk(req, "t"); !ok {
t.Error("Context should NOT have been cleared at end of request")
}
}

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vendor/github.com/gorilla/mux/context_native.go generated vendored Normal file
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// +build go1.7
package mux
import (
"context"
"net/http"
)
func contextGet(r *http.Request, key interface{}) interface{} {
return r.Context().Value(key)
}
func contextSet(r *http.Request, key, val interface{}) *http.Request {
if val == nil {
return r
}
return r.WithContext(context.WithValue(r.Context(), key, val))
}
func contextClear(r *http.Request) {
return
}

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// +build go1.7
package mux
import (
"context"
"net/http"
"testing"
"time"
)
func TestNativeContextMiddleware(t *testing.T) {
withTimeout := func(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ctx, cancel := context.WithTimeout(r.Context(), time.Minute)
defer cancel()
h.ServeHTTP(w, r.WithContext(ctx))
})
}
r := NewRouter()
r.Handle("/path/{foo}", withTimeout(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
vars := Vars(r)
if vars["foo"] != "bar" {
t.Fatal("Expected foo var to be set")
}
})))
rec := NewRecorder()
req := newRequest("GET", "/path/bar")
r.ServeHTTP(rec, req)
}

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// Copyright 2012 The Gorilla Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
/*
Package mux implements a request router and dispatcher.
The name mux stands for "HTTP request multiplexer". Like the standard
http.ServeMux, mux.Router matches incoming requests against a list of
registered routes and calls a handler for the route that matches the URL
or other conditions. The main features are:
* Requests can be matched based on URL host, path, path prefix, schemes,
header and query values, HTTP methods or using custom matchers.
* URL hosts and paths can have variables with an optional regular
expression.
* Registered URLs can be built, or "reversed", which helps maintaining
references to resources.
* Routes can be used as subrouters: nested routes are only tested if the
parent route matches. This is useful to define groups of routes that
share common conditions like a host, a path prefix or other repeated
attributes. As a bonus, this optimizes request matching.
* It implements the http.Handler interface so it is compatible with the
standard http.ServeMux.
Let's start registering a couple of URL paths and handlers:
func main() {
r := mux.NewRouter()
r.HandleFunc("/", HomeHandler)
r.HandleFunc("/products", ProductsHandler)
r.HandleFunc("/articles", ArticlesHandler)
http.Handle("/", r)
}
Here we register three routes mapping URL paths to handlers. This is
equivalent to how http.HandleFunc() works: if an incoming request URL matches
one of the paths, the corresponding handler is called passing
(http.ResponseWriter, *http.Request) as parameters.
Paths can have variables. They are defined using the format {name} or
{name:pattern}. If a regular expression pattern is not defined, the matched
variable will be anything until the next slash. For example:
r := mux.NewRouter()
r.HandleFunc("/products/{key}", ProductHandler)
r.HandleFunc("/articles/{category}/", ArticlesCategoryHandler)
r.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler)
Groups can be used inside patterns, as long as they are non-capturing (?:re). For example:
r.HandleFunc("/articles/{category}/{sort:(?:asc|desc|new)}", ArticlesCategoryHandler)
The names are used to create a map of route variables which can be retrieved
calling mux.Vars():
vars := mux.Vars(request)
category := vars["category"]
Note that if any capturing groups are present, mux will panic() during parsing. To prevent
this, convert any capturing groups to non-capturing, e.g. change "/{sort:(asc|desc)}" to
"/{sort:(?:asc|desc)}". This is a change from prior versions which behaved unpredictably
when capturing groups were present.
And this is all you need to know about the basic usage. More advanced options
are explained below.
Routes can also be restricted to a domain or subdomain. Just define a host
pattern to be matched. They can also have variables:
r := mux.NewRouter()
// Only matches if domain is "www.example.com".
r.Host("www.example.com")
// Matches a dynamic subdomain.
r.Host("{subdomain:[a-z]+}.domain.com")
There are several other matchers that can be added. To match path prefixes:
r.PathPrefix("/products/")
...or HTTP methods:
r.Methods("GET", "POST")
...or URL schemes:
r.Schemes("https")
...or header values:
r.Headers("X-Requested-With", "XMLHttpRequest")
...or query values:
r.Queries("key", "value")
...or to use a custom matcher function:
r.MatcherFunc(func(r *http.Request, rm *RouteMatch) bool {
return r.ProtoMajor == 0
})
...and finally, it is possible to combine several matchers in a single route:
r.HandleFunc("/products", ProductsHandler).
Host("www.example.com").
Methods("GET").
Schemes("http")
Setting the same matching conditions again and again can be boring, so we have
a way to group several routes that share the same requirements.
We call it "subrouting".
For example, let's say we have several URLs that should only match when the
host is "www.example.com". Create a route for that host and get a "subrouter"
from it:
r := mux.NewRouter()
s := r.Host("www.example.com").Subrouter()
Then register routes in the subrouter:
s.HandleFunc("/products/", ProductsHandler)
s.HandleFunc("/products/{key}", ProductHandler)
s.HandleFunc("/articles/{category}/{id:[0-9]+}"), ArticleHandler)
The three URL paths we registered above will only be tested if the domain is
"www.example.com", because the subrouter is tested first. This is not
only convenient, but also optimizes request matching. You can create
subrouters combining any attribute matchers accepted by a route.
Subrouters can be used to create domain or path "namespaces": you define
subrouters in a central place and then parts of the app can register its
paths relatively to a given subrouter.
There's one more thing about subroutes. When a subrouter has a path prefix,
the inner routes use it as base for their paths:
r := mux.NewRouter()
s := r.PathPrefix("/products").Subrouter()
// "/products/"
s.HandleFunc("/", ProductsHandler)
// "/products/{key}/"
s.HandleFunc("/{key}/", ProductHandler)
// "/products/{key}/details"
s.HandleFunc("/{key}/details", ProductDetailsHandler)
Note that the path provided to PathPrefix() represents a "wildcard": calling
PathPrefix("/static/").Handler(...) means that the handler will be passed any
request that matches "/static/*". This makes it easy to serve static files with mux:
func main() {
var dir string
flag.StringVar(&dir, "dir", ".", "the directory to serve files from. Defaults to the current dir")
flag.Parse()
r := mux.NewRouter()
// This will serve files under http://localhost:8000/static/<filename>
r.PathPrefix("/static/").Handler(http.StripPrefix("/static/", http.FileServer(http.Dir(dir))))
srv := &http.Server{
Handler: r,
Addr: "127.0.0.1:8000",
// Good practice: enforce timeouts for servers you create!
WriteTimeout: 15 * time.Second,
ReadTimeout: 15 * time.Second,
}
log.Fatal(srv.ListenAndServe())
}
Now let's see how to build registered URLs.
Routes can be named. All routes that define a name can have their URLs built,
or "reversed". We define a name calling Name() on a route. For example:
r := mux.NewRouter()
r.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler).
Name("article")
To build a URL, get the route and call the URL() method, passing a sequence of
key/value pairs for the route variables. For the previous route, we would do:
url, err := r.Get("article").URL("category", "technology", "id", "42")
...and the result will be a url.URL with the following path:
"/articles/technology/42"
This also works for host variables:
r := mux.NewRouter()
r.Host("{subdomain}.domain.com").
Path("/articles/{category}/{id:[0-9]+}").
HandlerFunc(ArticleHandler).
Name("article")
// url.String() will be "http://news.domain.com/articles/technology/42"
url, err := r.Get("article").URL("subdomain", "news",
"category", "technology",
"id", "42")
All variables defined in the route are required, and their values must
conform to the corresponding patterns. These requirements guarantee that a
generated URL will always match a registered route -- the only exception is
for explicitly defined "build-only" routes which never match.
Regex support also exists for matching Headers within a route. For example, we could do:
r.HeadersRegexp("Content-Type", "application/(text|json)")
...and the route will match both requests with a Content-Type of `application/json` as well as
`application/text`
There's also a way to build only the URL host or path for a route:
use the methods URLHost() or URLPath() instead. For the previous route,
we would do:
// "http://news.domain.com/"
host, err := r.Get("article").URLHost("subdomain", "news")
// "/articles/technology/42"
path, err := r.Get("article").URLPath("category", "technology", "id", "42")
And if you use subrouters, host and path defined separately can be built
as well:
r := mux.NewRouter()
s := r.Host("{subdomain}.domain.com").Subrouter()
s.Path("/articles/{category}/{id:[0-9]+}").
HandlerFunc(ArticleHandler).
Name("article")
// "http://news.domain.com/articles/technology/42"
url, err := r.Get("article").URL("subdomain", "news",
"category", "technology",
"id", "42")
*/
package mux

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// Copyright 2012 The Gorilla Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package mux
import (
"errors"
"fmt"
"net/http"
"path"
"regexp"
"strings"
)
// NewRouter returns a new router instance.
func NewRouter() *Router {
return &Router{namedRoutes: make(map[string]*Route), KeepContext: false}
}
// Router registers routes to be matched and dispatches a handler.
//
// It implements the http.Handler interface, so it can be registered to serve
// requests:
//
// var router = mux.NewRouter()
//
// func main() {
// http.Handle("/", router)
// }
//
// Or, for Google App Engine, register it in a init() function:
//
// func init() {
// http.Handle("/", router)
// }
//
// This will send all incoming requests to the router.
type Router struct {
// Configurable Handler to be used when no route matches.
NotFoundHandler http.Handler
// Parent route, if this is a subrouter.
parent parentRoute
// Routes to be matched, in order.
routes []*Route
// Routes by name for URL building.
namedRoutes map[string]*Route
// See Router.StrictSlash(). This defines the flag for new routes.
strictSlash bool
// See Router.SkipClean(). This defines the flag for new routes.
skipClean bool
// If true, do not clear the request context after handling the request.
// This has no effect when go1.7+ is used, since the context is stored
// on the request itself.
KeepContext bool
// see Router.UseEncodedPath(). This defines a flag for all routes.
useEncodedPath bool
}
// Match matches registered routes against the request.
func (r *Router) Match(req *http.Request, match *RouteMatch) bool {
for _, route := range r.routes {
if route.Match(req, match) {
return true
}
}
// Closest match for a router (includes sub-routers)
if r.NotFoundHandler != nil {
match.Handler = r.NotFoundHandler
return true
}
return false
}
// ServeHTTP dispatches the handler registered in the matched route.
//
// When there is a match, the route variables can be retrieved calling
// mux.Vars(request).
func (r *Router) ServeHTTP(w http.ResponseWriter, req *http.Request) {
if !r.skipClean {
path := req.URL.Path
if r.useEncodedPath {
path = getPath(req)
}
// Clean path to canonical form and redirect.
if p := cleanPath(path); p != path {
// Added 3 lines (Philip Schlump) - It was dropping the query string and #whatever from query.
// This matches with fix in go 1.2 r.c. 4 for same problem. Go Issue:
// http://code.google.com/p/go/issues/detail?id=5252
url := *req.URL
url.Path = p
p = url.String()
w.Header().Set("Location", p)
w.WriteHeader(http.StatusMovedPermanently)
return
}
}
var match RouteMatch
var handler http.Handler
if r.Match(req, &match) {
handler = match.Handler
req = setVars(req, match.Vars)
req = setCurrentRoute(req, match.Route)
}
if handler == nil {
handler = http.NotFoundHandler()
}
if !r.KeepContext {
defer contextClear(req)
}
handler.ServeHTTP(w, req)
}
// Get returns a route registered with the given name.
func (r *Router) Get(name string) *Route {
return r.getNamedRoutes()[name]
}
// GetRoute returns a route registered with the given name. This method
// was renamed to Get() and remains here for backwards compatibility.
func (r *Router) GetRoute(name string) *Route {
return r.getNamedRoutes()[name]
}
// StrictSlash defines the trailing slash behavior for new routes. The initial
// value is false.
//
// When true, if the route path is "/path/", accessing "/path" will redirect
// to the former and vice versa. In other words, your application will always
// see the path as specified in the route.
//
// When false, if the route path is "/path", accessing "/path/" will not match
// this route and vice versa.
//
// Special case: when a route sets a path prefix using the PathPrefix() method,
// strict slash is ignored for that route because the redirect behavior can't
// be determined from a prefix alone. However, any subrouters created from that
// route inherit the original StrictSlash setting.
func (r *Router) StrictSlash(value bool) *Router {
r.strictSlash = value
return r
}
// SkipClean defines the path cleaning behaviour for new routes. The initial
// value is false. Users should be careful about which routes are not cleaned
//
// When true, if the route path is "/path//to", it will remain with the double
// slash. This is helpful if you have a route like: /fetch/http://xkcd.com/534/
//
// When false, the path will be cleaned, so /fetch/http://xkcd.com/534/ will
// become /fetch/http/xkcd.com/534
func (r *Router) SkipClean(value bool) *Router {
r.skipClean = value
return r
}
// UseEncodedPath tells the router to match the encoded original path
// to the routes.
// For eg. "/path/foo%2Fbar/to" will match the path "/path/{var}/to".
// This behavior has the drawback of needing to match routes against
// r.RequestURI instead of r.URL.Path. Any modifications (such as http.StripPrefix)
// to r.URL.Path will not affect routing when this flag is on and thus may
// induce unintended behavior.
//
// If not called, the router will match the unencoded path to the routes.
// For eg. "/path/foo%2Fbar/to" will match the path "/path/foo/bar/to"
func (r *Router) UseEncodedPath() *Router {
r.useEncodedPath = true
return r
}
// ----------------------------------------------------------------------------
// parentRoute
// ----------------------------------------------------------------------------
// getNamedRoutes returns the map where named routes are registered.
func (r *Router) getNamedRoutes() map[string]*Route {
if r.namedRoutes == nil {
if r.parent != nil {
r.namedRoutes = r.parent.getNamedRoutes()
} else {
r.namedRoutes = make(map[string]*Route)
}
}
return r.namedRoutes
}
// getRegexpGroup returns regexp definitions from the parent route, if any.
func (r *Router) getRegexpGroup() *routeRegexpGroup {
if r.parent != nil {
return r.parent.getRegexpGroup()
}
return nil
}
func (r *Router) buildVars(m map[string]string) map[string]string {
if r.parent != nil {
m = r.parent.buildVars(m)
}
return m
}
// ----------------------------------------------------------------------------
// Route factories
// ----------------------------------------------------------------------------
// NewRoute registers an empty route.
func (r *Router) NewRoute() *Route {
route := &Route{parent: r, strictSlash: r.strictSlash, skipClean: r.skipClean, useEncodedPath: r.useEncodedPath}
r.routes = append(r.routes, route)
return route
}
// Handle registers a new route with a matcher for the URL path.
// See Route.Path() and Route.Handler().
func (r *Router) Handle(path string, handler http.Handler) *Route {
return r.NewRoute().Path(path).Handler(handler)
}
// HandleFunc registers a new route with a matcher for the URL path.
// See Route.Path() and Route.HandlerFunc().
func (r *Router) HandleFunc(path string, f func(http.ResponseWriter,
*http.Request)) *Route {
return r.NewRoute().Path(path).HandlerFunc(f)
}
// Headers registers a new route with a matcher for request header values.
// See Route.Headers().
func (r *Router) Headers(pairs ...string) *Route {
return r.NewRoute().Headers(pairs...)
}
// Host registers a new route with a matcher for the URL host.
// See Route.Host().
func (r *Router) Host(tpl string) *Route {
return r.NewRoute().Host(tpl)
}
// MatcherFunc registers a new route with a custom matcher function.
// See Route.MatcherFunc().
func (r *Router) MatcherFunc(f MatcherFunc) *Route {
return r.NewRoute().MatcherFunc(f)
}
// Methods registers a new route with a matcher for HTTP methods.
// See Route.Methods().
func (r *Router) Methods(methods ...string) *Route {
return r.NewRoute().Methods(methods...)
}
// Path registers a new route with a matcher for the URL path.
// See Route.Path().
func (r *Router) Path(tpl string) *Route {
return r.NewRoute().Path(tpl)
}
// PathPrefix registers a new route with a matcher for the URL path prefix.
// See Route.PathPrefix().
func (r *Router) PathPrefix(tpl string) *Route {
return r.NewRoute().PathPrefix(tpl)
}
// Queries registers a new route with a matcher for URL query values.
// See Route.Queries().
func (r *Router) Queries(pairs ...string) *Route {
return r.NewRoute().Queries(pairs...)
}
// Schemes registers a new route with a matcher for URL schemes.
// See Route.Schemes().
func (r *Router) Schemes(schemes ...string) *Route {
return r.NewRoute().Schemes(schemes...)
}
// BuildVarsFunc registers a new route with a custom function for modifying
// route variables before building a URL.
func (r *Router) BuildVarsFunc(f BuildVarsFunc) *Route {
return r.NewRoute().BuildVarsFunc(f)
}
// Walk walks the router and all its sub-routers, calling walkFn for each route
// in the tree. The routes are walked in the order they were added. Sub-routers
// are explored depth-first.
func (r *Router) Walk(walkFn WalkFunc) error {
return r.walk(walkFn, []*Route{})
}
// SkipRouter is used as a return value from WalkFuncs to indicate that the
// router that walk is about to descend down to should be skipped.
var SkipRouter = errors.New("skip this router")
// WalkFunc is the type of the function called for each route visited by Walk.
// At every invocation, it is given the current route, and the current router,
// and a list of ancestor routes that lead to the current route.
type WalkFunc func(route *Route, router *Router, ancestors []*Route) error
func (r *Router) walk(walkFn WalkFunc, ancestors []*Route) error {
for _, t := range r.routes {
if t.regexp == nil || t.regexp.path == nil || t.regexp.path.template == "" {
continue
}
err := walkFn(t, r, ancestors)
if err == SkipRouter {
continue
}
if err != nil {
return err
}
for _, sr := range t.matchers {
if h, ok := sr.(*Router); ok {
err := h.walk(walkFn, ancestors)
if err != nil {
return err
}
}
}
if h, ok := t.handler.(*Router); ok {
ancestors = append(ancestors, t)
err := h.walk(walkFn, ancestors)
if err != nil {
return err
}
ancestors = ancestors[:len(ancestors)-1]
}
}
return nil
}
// ----------------------------------------------------------------------------
// Context
// ----------------------------------------------------------------------------
// RouteMatch stores information about a matched route.
type RouteMatch struct {
Route *Route
Handler http.Handler
Vars map[string]string
}
type contextKey int
const (
varsKey contextKey = iota
routeKey
)
// Vars returns the route variables for the current request, if any.
func Vars(r *http.Request) map[string]string {
if rv := contextGet(r, varsKey); rv != nil {
return rv.(map[string]string)
}
return nil
}
// CurrentRoute returns the matched route for the current request, if any.
// This only works when called inside the handler of the matched route
// because the matched route is stored in the request context which is cleared
// after the handler returns, unless the KeepContext option is set on the
// Router.
func CurrentRoute(r *http.Request) *Route {
if rv := contextGet(r, routeKey); rv != nil {
return rv.(*Route)
}
return nil
}
func setVars(r *http.Request, val interface{}) *http.Request {
return contextSet(r, varsKey, val)
}
func setCurrentRoute(r *http.Request, val interface{}) *http.Request {
return contextSet(r, routeKey, val)
}
// ----------------------------------------------------------------------------
// Helpers
// ----------------------------------------------------------------------------
// getPath returns the escaped path if possible; doing what URL.EscapedPath()
// which was added in go1.5 does
func getPath(req *http.Request) string {
if req.RequestURI != "" {
// Extract the path from RequestURI (which is escaped unlike URL.Path)
// as detailed here as detailed in https://golang.org/pkg/net/url/#URL
// for < 1.5 server side workaround
// http://localhost/path/here?v=1 -> /path/here
path := req.RequestURI
path = strings.TrimPrefix(path, req.URL.Scheme+`://`)
path = strings.TrimPrefix(path, req.URL.Host)
if i := strings.LastIndex(path, "?"); i > -1 {
path = path[:i]
}
if i := strings.LastIndex(path, "#"); i > -1 {
path = path[:i]
}
return path
}
return req.URL.Path
}
// cleanPath returns the canonical path for p, eliminating . and .. elements.
// Borrowed from the net/http package.
func cleanPath(p string) string {
if p == "" {
return "/"
}
if p[0] != '/' {
p = "/" + p
}
np := path.Clean(p)
// path.Clean removes trailing slash except for root;
// put the trailing slash back if necessary.
if p[len(p)-1] == '/' && np != "/" {
np += "/"
}
return np
}
// uniqueVars returns an error if two slices contain duplicated strings.
func uniqueVars(s1, s2 []string) error {
for _, v1 := range s1 {
for _, v2 := range s2 {
if v1 == v2 {
return fmt.Errorf("mux: duplicated route variable %q", v2)
}
}
}
return nil
}
// checkPairs returns the count of strings passed in, and an error if
// the count is not an even number.
func checkPairs(pairs ...string) (int, error) {
length := len(pairs)
if length%2 != 0 {
return length, fmt.Errorf(
"mux: number of parameters must be multiple of 2, got %v", pairs)
}
return length, nil
}
// mapFromPairsToString converts variadic string parameters to a
// string to string map.
func mapFromPairsToString(pairs ...string) (map[string]string, error) {
length, err := checkPairs(pairs...)
if err != nil {
return nil, err
}
m := make(map[string]string, length/2)
for i := 0; i < length; i += 2 {
m[pairs[i]] = pairs[i+1]
}
return m, nil
}
// mapFromPairsToRegex converts variadic string paramers to a
// string to regex map.
func mapFromPairsToRegex(pairs ...string) (map[string]*regexp.Regexp, error) {
length, err := checkPairs(pairs...)
if err != nil {
return nil, err
}
m := make(map[string]*regexp.Regexp, length/2)
for i := 0; i < length; i += 2 {
regex, err := regexp.Compile(pairs[i+1])
if err != nil {
return nil, err
}
m[pairs[i]] = regex
}
return m, nil
}
// matchInArray returns true if the given string value is in the array.
func matchInArray(arr []string, value string) bool {
for _, v := range arr {
if v == value {
return true
}
}
return false
}
// matchMapWithString returns true if the given key/value pairs exist in a given map.
func matchMapWithString(toCheck map[string]string, toMatch map[string][]string, canonicalKey bool) bool {
for k, v := range toCheck {
// Check if key exists.
if canonicalKey {
k = http.CanonicalHeaderKey(k)
}
if values := toMatch[k]; values == nil {
return false
} else if v != "" {
// If value was defined as an empty string we only check that the
// key exists. Otherwise we also check for equality.
valueExists := false
for _, value := range values {
if v == value {
valueExists = true
break
}
}
if !valueExists {
return false
}
}
}
return true
}
// matchMapWithRegex returns true if the given key/value pairs exist in a given map compiled against
// the given regex
func matchMapWithRegex(toCheck map[string]*regexp.Regexp, toMatch map[string][]string, canonicalKey bool) bool {
for k, v := range toCheck {
// Check if key exists.
if canonicalKey {
k = http.CanonicalHeaderKey(k)
}
if values := toMatch[k]; values == nil {
return false
} else if v != nil {
// If value was defined as an empty string we only check that the
// key exists. Otherwise we also check for equality.
valueExists := false
for _, value := range values {
if v.MatchString(value) {
valueExists = true
break
}
}
if !valueExists {
return false
}
}
}
return true
}

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// Old tests ported to Go1. This is a mess. Want to drop it one day.
// Copyright 2011 Gorilla Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package mux
import (
"bytes"
"net/http"
"testing"
)
// ----------------------------------------------------------------------------
// ResponseRecorder
// ----------------------------------------------------------------------------
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// ResponseRecorder is an implementation of http.ResponseWriter that
// records its mutations for later inspection in tests.
type ResponseRecorder struct {
Code int // the HTTP response code from WriteHeader
HeaderMap http.Header // the HTTP response headers
Body *bytes.Buffer // if non-nil, the bytes.Buffer to append written data to
Flushed bool
}
// NewRecorder returns an initialized ResponseRecorder.
func NewRecorder() *ResponseRecorder {
return &ResponseRecorder{
HeaderMap: make(http.Header),
Body: new(bytes.Buffer),
}
}
// Header returns the response headers.
func (rw *ResponseRecorder) Header() http.Header {
return rw.HeaderMap
}
// Write always succeeds and writes to rw.Body, if not nil.
func (rw *ResponseRecorder) Write(buf []byte) (int, error) {
if rw.Body != nil {
rw.Body.Write(buf)
}
if rw.Code == 0 {
rw.Code = http.StatusOK
}
return len(buf), nil
}
// WriteHeader sets rw.Code.
func (rw *ResponseRecorder) WriteHeader(code int) {
rw.Code = code
}
// Flush sets rw.Flushed to true.
func (rw *ResponseRecorder) Flush() {
rw.Flushed = true
}
// ----------------------------------------------------------------------------
func TestRouteMatchers(t *testing.T) {
var scheme, host, path, query, method string
var headers map[string]string
var resultVars map[bool]map[string]string
router := NewRouter()
router.NewRoute().Host("{var1}.google.com").
Path("/{var2:[a-z]+}/{var3:[0-9]+}").
Queries("foo", "bar").
Methods("GET").
Schemes("https").
Headers("x-requested-with", "XMLHttpRequest")
router.NewRoute().Host("www.{var4}.com").
PathPrefix("/foo/{var5:[a-z]+}/{var6:[0-9]+}").
Queries("baz", "ding").
Methods("POST").
Schemes("http").
Headers("Content-Type", "application/json")
reset := func() {
// Everything match.
scheme = "https"
host = "www.google.com"
path = "/product/42"
query = "?foo=bar"
method = "GET"
headers = map[string]string{"X-Requested-With": "XMLHttpRequest"}
resultVars = map[bool]map[string]string{
true: {"var1": "www", "var2": "product", "var3": "42"},
false: {},
}
}
reset2 := func() {
// Everything match.
scheme = "http"
host = "www.google.com"
path = "/foo/product/42/path/that/is/ignored"
query = "?baz=ding"
method = "POST"
headers = map[string]string{"Content-Type": "application/json"}
resultVars = map[bool]map[string]string{
true: {"var4": "google", "var5": "product", "var6": "42"},
false: {},
}
}
match := func(shouldMatch bool) {
url := scheme + "://" + host + path + query
request, _ := http.NewRequest(method, url, nil)
for key, value := range headers {
request.Header.Add(key, value)
}
var routeMatch RouteMatch
matched := router.Match(request, &routeMatch)
if matched != shouldMatch {
// Need better messages. :)
if matched {
t.Errorf("Should match.")
} else {
t.Errorf("Should not match.")
}
}
if matched {
currentRoute := routeMatch.Route
if currentRoute == nil {
t.Errorf("Expected a current route.")
}
vars := routeMatch.Vars
expectedVars := resultVars[shouldMatch]
if len(vars) != len(expectedVars) {
t.Errorf("Expected vars: %v Got: %v.", expectedVars, vars)
}
for name, value := range vars {
if expectedVars[name] != value {
t.Errorf("Expected vars: %v Got: %v.", expectedVars, vars)
}
}
}
}
// 1st route --------------------------------------------------------------
// Everything match.
reset()
match(true)
// Scheme doesn't match.
reset()
scheme = "http"
match(false)
// Host doesn't match.
reset()
host = "www.mygoogle.com"
match(false)
// Path doesn't match.
reset()
path = "/product/notdigits"
match(false)
// Query doesn't match.
reset()
query = "?foo=baz"
match(false)
// Method doesn't match.
reset()
method = "POST"
match(false)
// Header doesn't match.
reset()
headers = map[string]string{}
match(false)
// Everything match, again.
reset()
match(true)
// 2nd route --------------------------------------------------------------
// Everything match.
reset2()
match(true)
// Scheme doesn't match.
reset2()
scheme = "https"
match(false)
// Host doesn't match.
reset2()
host = "sub.google.com"
match(false)
// Path doesn't match.
reset2()
path = "/bar/product/42"
match(false)
// Query doesn't match.
reset2()
query = "?foo=baz"
match(false)
// Method doesn't match.
reset2()
method = "GET"
match(false)
// Header doesn't match.
reset2()
headers = map[string]string{}
match(false)
// Everything match, again.
reset2()
match(true)
}
type headerMatcherTest struct {
matcher headerMatcher
headers map[string]string
result bool
}
var headerMatcherTests = []headerMatcherTest{
{
matcher: headerMatcher(map[string]string{"x-requested-with": "XMLHttpRequest"}),
headers: map[string]string{"X-Requested-With": "XMLHttpRequest"},
result: true,
},
{
matcher: headerMatcher(map[string]string{"x-requested-with": ""}),
headers: map[string]string{"X-Requested-With": "anything"},
result: true,
},
{
matcher: headerMatcher(map[string]string{"x-requested-with": "XMLHttpRequest"}),
headers: map[string]string{},
result: false,
},
}
type hostMatcherTest struct {
matcher *Route
url string
vars map[string]string
result bool
}
var hostMatcherTests = []hostMatcherTest{
{
matcher: NewRouter().NewRoute().Host("{foo:[a-z][a-z][a-z]}.{bar:[a-z][a-z][a-z]}.{baz:[a-z][a-z][a-z]}"),
url: "http://abc.def.ghi/",
vars: map[string]string{"foo": "abc", "bar": "def", "baz": "ghi"},
result: true,
},
{
matcher: NewRouter().NewRoute().Host("{foo:[a-z][a-z][a-z]}.{bar:[a-z][a-z][a-z]}.{baz:[a-z][a-z][a-z]}"),
url: "http://a.b.c/",
vars: map[string]string{"foo": "abc", "bar": "def", "baz": "ghi"},
result: false,
},
}
type methodMatcherTest struct {
matcher methodMatcher
method string
result bool
}
var methodMatcherTests = []methodMatcherTest{
{
matcher: methodMatcher([]string{"GET", "POST", "PUT"}),
method: "GET",
result: true,
},
{
matcher: methodMatcher([]string{"GET", "POST", "PUT"}),
method: "POST",
result: true,
},
{
matcher: methodMatcher([]string{"GET", "POST", "PUT"}),
method: "PUT",
result: true,
},
{
matcher: methodMatcher([]string{"GET", "POST", "PUT"}),
method: "DELETE",
result: false,
},
}
type pathMatcherTest struct {
matcher *Route
url string
vars map[string]string
result bool
}
var pathMatcherTests = []pathMatcherTest{
{
matcher: NewRouter().NewRoute().Path("/{foo:[0-9][0-9][0-9]}/{bar:[0-9][0-9][0-9]}/{baz:[0-9][0-9][0-9]}"),
url: "http://localhost:8080/123/456/789",
vars: map[string]string{"foo": "123", "bar": "456", "baz": "789"},
result: true,
},
{
matcher: NewRouter().NewRoute().Path("/{foo:[0-9][0-9][0-9]}/{bar:[0-9][0-9][0-9]}/{baz:[0-9][0-9][0-9]}"),
url: "http://localhost:8080/1/2/3",
vars: map[string]string{"foo": "123", "bar": "456", "baz": "789"},
result: false,
},
}
type schemeMatcherTest struct {
matcher schemeMatcher
url string
result bool
}
var schemeMatcherTests = []schemeMatcherTest{
{
matcher: schemeMatcher([]string{"http", "https"}),
url: "http://localhost:8080/",
result: true,
},
{
matcher: schemeMatcher([]string{"http", "https"}),
url: "https://localhost:8080/",
result: true,
},
{
matcher: schemeMatcher([]string{"https"}),
url: "http://localhost:8080/",
result: false,
},
{
matcher: schemeMatcher([]string{"http"}),
url: "https://localhost:8080/",
result: false,
},
}
type urlBuildingTest struct {
route *Route
vars []string
url string
}
var urlBuildingTests = []urlBuildingTest{
{
route: new(Route).Host("foo.domain.com"),
vars: []string{},
url: "http://foo.domain.com",
},
{
route: new(Route).Host("{subdomain}.domain.com"),
vars: []string{"subdomain", "bar"},
url: "http://bar.domain.com",
},
{
route: new(Route).Host("foo.domain.com").Path("/articles"),
vars: []string{},
url: "http://foo.domain.com/articles",
},
{
route: new(Route).Path("/articles"),
vars: []string{},
url: "/articles",
},
{
route: new(Route).Path("/articles/{category}/{id:[0-9]+}"),
vars: []string{"category", "technology", "id", "42"},
url: "/articles/technology/42",
},
{
route: new(Route).Host("{subdomain}.domain.com").Path("/articles/{category}/{id:[0-9]+}"),
vars: []string{"subdomain", "foo", "category", "technology", "id", "42"},
url: "http://foo.domain.com/articles/technology/42",
},
}
func TestHeaderMatcher(t *testing.T) {
for _, v := range headerMatcherTests {
request, _ := http.NewRequest("GET", "http://localhost:8080/", nil)
for key, value := range v.headers {
request.Header.Add(key, value)
}
var routeMatch RouteMatch
result := v.matcher.Match(request, &routeMatch)
if result != v.result {
if v.result {
t.Errorf("%#v: should match %v.", v.matcher, request.Header)
} else {
t.Errorf("%#v: should not match %v.", v.matcher, request.Header)
}
}
}
}
func TestHostMatcher(t *testing.T) {
for _, v := range hostMatcherTests {
request, _ := http.NewRequest("GET", v.url, nil)
var routeMatch RouteMatch
result := v.matcher.Match(request, &routeMatch)
vars := routeMatch.Vars
if result != v.result {
if v.result {
t.Errorf("%#v: should match %v.", v.matcher, v.url)
} else {
t.Errorf("%#v: should not match %v.", v.matcher, v.url)
}
}
if result {
if len(vars) != len(v.vars) {
t.Errorf("%#v: vars length should be %v, got %v.", v.matcher, len(v.vars), len(vars))
}
for name, value := range vars {
if v.vars[name] != value {
t.Errorf("%#v: expected value %v for key %v, got %v.", v.matcher, v.vars[name], name, value)
}
}
} else {
if len(vars) != 0 {
t.Errorf("%#v: vars length should be 0, got %v.", v.matcher, len(vars))
}
}
}
}
func TestMethodMatcher(t *testing.T) {
for _, v := range methodMatcherTests {
request, _ := http.NewRequest(v.method, "http://localhost:8080/", nil)
var routeMatch RouteMatch
result := v.matcher.Match(request, &routeMatch)
if result != v.result {
if v.result {
t.Errorf("%#v: should match %v.", v.matcher, v.method)
} else {
t.Errorf("%#v: should not match %v.", v.matcher, v.method)
}
}
}
}
func TestPathMatcher(t *testing.T) {
for _, v := range pathMatcherTests {
request, _ := http.NewRequest("GET", v.url, nil)
var routeMatch RouteMatch
result := v.matcher.Match(request, &routeMatch)
vars := routeMatch.Vars
if result != v.result {
if v.result {
t.Errorf("%#v: should match %v.", v.matcher, v.url)
} else {
t.Errorf("%#v: should not match %v.", v.matcher, v.url)
}
}
if result {
if len(vars) != len(v.vars) {
t.Errorf("%#v: vars length should be %v, got %v.", v.matcher, len(v.vars), len(vars))
}
for name, value := range vars {
if v.vars[name] != value {
t.Errorf("%#v: expected value %v for key %v, got %v.", v.matcher, v.vars[name], name, value)
}
}
} else {
if len(vars) != 0 {
t.Errorf("%#v: vars length should be 0, got %v.", v.matcher, len(vars))
}
}
}
}
func TestSchemeMatcher(t *testing.T) {
for _, v := range schemeMatcherTests {
request, _ := http.NewRequest("GET", v.url, nil)
var routeMatch RouteMatch
result := v.matcher.Match(request, &routeMatch)
if result != v.result {
if v.result {
t.Errorf("%#v: should match %v.", v.matcher, v.url)
} else {
t.Errorf("%#v: should not match %v.", v.matcher, v.url)
}
}
}
}
func TestUrlBuilding(t *testing.T) {
for _, v := range urlBuildingTests {
u, _ := v.route.URL(v.vars...)
url := u.String()
if url != v.url {
t.Errorf("expected %v, got %v", v.url, url)
/*
reversePath := ""
reverseHost := ""
if v.route.pathTemplate != nil {
reversePath = v.route.pathTemplate.Reverse
}
if v.route.hostTemplate != nil {
reverseHost = v.route.hostTemplate.Reverse
}
t.Errorf("%#v:\nexpected: %q\ngot: %q\nreverse path: %q\nreverse host: %q", v.route, v.url, url, reversePath, reverseHost)
*/
}
}
ArticleHandler := func(w http.ResponseWriter, r *http.Request) {
}
router := NewRouter()
router.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler).Name("article")
url, _ := router.Get("article").URL("category", "technology", "id", "42")
expected := "/articles/technology/42"
if url.String() != expected {
t.Errorf("Expected %v, got %v", expected, url.String())
}
}
func TestMatchedRouteName(t *testing.T) {
routeName := "stock"
router := NewRouter()
route := router.NewRoute().Path("/products/").Name(routeName)
url := "http://www.example.com/products/"
request, _ := http.NewRequest("GET", url, nil)
var rv RouteMatch
ok := router.Match(request, &rv)
if !ok || rv.Route != route {
t.Errorf("Expected same route, got %+v.", rv.Route)
}
retName := rv.Route.GetName()
if retName != routeName {
t.Errorf("Expected %q, got %q.", routeName, retName)
}
}
func TestSubRouting(t *testing.T) {
// Example from docs.
router := NewRouter()
subrouter := router.NewRoute().Host("www.example.com").Subrouter()
route := subrouter.NewRoute().Path("/products/").Name("products")
url := "http://www.example.com/products/"
request, _ := http.NewRequest("GET", url, nil)
var rv RouteMatch
ok := router.Match(request, &rv)
if !ok || rv.Route != route {
t.Errorf("Expected same route, got %+v.", rv.Route)
}
u, _ := router.Get("products").URL()
builtURL := u.String()
// Yay, subroute aware of the domain when building!
if builtURL != url {
t.Errorf("Expected %q, got %q.", url, builtURL)
}
}
func TestVariableNames(t *testing.T) {
route := new(Route).Host("{arg1}.domain.com").Path("/{arg1}/{arg2:[0-9]+}")
if route.err == nil {
t.Errorf("Expected error for duplicated variable names")
}
}
func TestRedirectSlash(t *testing.T) {
var route *Route
var routeMatch RouteMatch
r := NewRouter()
r.StrictSlash(false)
route = r.NewRoute()
if route.strictSlash != false {
t.Errorf("Expected false redirectSlash.")
}
r.StrictSlash(true)
route = r.NewRoute()
if route.strictSlash != true {
t.Errorf("Expected true redirectSlash.")
}
route = new(Route)
route.strictSlash = true
route.Path("/{arg1}/{arg2:[0-9]+}/")
request, _ := http.NewRequest("GET", "http://localhost/foo/123", nil)
routeMatch = RouteMatch{}
_ = route.Match(request, &routeMatch)
vars := routeMatch.Vars
if vars["arg1"] != "foo" {
t.Errorf("Expected foo.")
}
if vars["arg2"] != "123" {
t.Errorf("Expected 123.")
}
rsp := NewRecorder()
routeMatch.Handler.ServeHTTP(rsp, request)
if rsp.HeaderMap.Get("Location") != "http://localhost/foo/123/" {
t.Errorf("Expected redirect header.")
}
route = new(Route)
route.strictSlash = true
route.Path("/{arg1}/{arg2:[0-9]+}")
request, _ = http.NewRequest("GET", "http://localhost/foo/123/", nil)
routeMatch = RouteMatch{}
_ = route.Match(request, &routeMatch)
vars = routeMatch.Vars
if vars["arg1"] != "foo" {
t.Errorf("Expected foo.")
}
if vars["arg2"] != "123" {
t.Errorf("Expected 123.")
}
rsp = NewRecorder()
routeMatch.Handler.ServeHTTP(rsp, request)
if rsp.HeaderMap.Get("Location") != "http://localhost/foo/123" {
t.Errorf("Expected redirect header.")
}
}
// Test for the new regexp library, still not available in stable Go.
func TestNewRegexp(t *testing.T) {
var p *routeRegexp
var matches []string
tests := map[string]map[string][]string{
"/{foo:a{2}}": {
"/a": nil,
"/aa": {"aa"},
"/aaa": nil,
"/aaaa": nil,
},
"/{foo:a{2,}}": {
"/a": nil,
"/aa": {"aa"},
"/aaa": {"aaa"},
"/aaaa": {"aaaa"},
},
"/{foo:a{2,3}}": {
"/a": nil,
"/aa": {"aa"},
"/aaa": {"aaa"},
"/aaaa": nil,
},
"/{foo:[a-z]{3}}/{bar:[a-z]{2}}": {
"/a": nil,
"/ab": nil,
"/abc": nil,
"/abcd": nil,
"/abc/ab": {"abc", "ab"},
"/abc/abc": nil,
"/abcd/ab": nil,
},
`/{foo:\w{3,}}/{bar:\d{2,}}`: {
"/a": nil,
"/ab": nil,
"/abc": nil,
"/abc/1": nil,
"/abc/12": {"abc", "12"},
"/abcd/12": {"abcd", "12"},
"/abcd/123": {"abcd", "123"},
},
}
for pattern, paths := range tests {
p, _ = newRouteRegexp(pattern, false, false, false, false, false)
for path, result := range paths {
matches = p.regexp.FindStringSubmatch(path)
if result == nil {
if matches != nil {
t.Errorf("%v should not match %v.", pattern, path)
}
} else {
if len(matches) != len(result)+1 {
t.Errorf("Expected %v matches, got %v.", len(result)+1, len(matches))
} else {
for k, v := range result {
if matches[k+1] != v {
t.Errorf("Expected %v, got %v.", v, matches[k+1])
}
}
}
}
}
}
}

323
vendor/github.com/gorilla/mux/regexp.go generated vendored Normal file
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@ -0,0 +1,323 @@
// Copyright 2012 The Gorilla Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package mux
import (
"bytes"
"fmt"
"net/http"
"net/url"
"regexp"
"strconv"
"strings"
)
// newRouteRegexp parses a route template and returns a routeRegexp,
// used to match a host, a path or a query string.
//
// It will extract named variables, assemble a regexp to be matched, create
// a "reverse" template to build URLs and compile regexps to validate variable
// values used in URL building.
//
// Previously we accepted only Python-like identifiers for variable
// names ([a-zA-Z_][a-zA-Z0-9_]*), but currently the only restriction is that
// name and pattern can't be empty, and names can't contain a colon.
func newRouteRegexp(tpl string, matchHost, matchPrefix, matchQuery, strictSlash, useEncodedPath bool) (*routeRegexp, error) {
// Check if it is well-formed.
idxs, errBraces := braceIndices(tpl)
if errBraces != nil {
return nil, errBraces
}
// Backup the original.
template := tpl
// Now let's parse it.
defaultPattern := "[^/]+"
if matchQuery {
defaultPattern = "[^?&]*"
} else if matchHost {
defaultPattern = "[^.]+"
matchPrefix = false
}
// Only match strict slash if not matching
if matchPrefix || matchHost || matchQuery {
strictSlash = false
}
// Set a flag for strictSlash.
endSlash := false
if strictSlash && strings.HasSuffix(tpl, "/") {
tpl = tpl[:len(tpl)-1]
endSlash = true
}
varsN := make([]string, len(idxs)/2)
varsR := make([]*regexp.Regexp, len(idxs)/2)
pattern := bytes.NewBufferString("")
pattern.WriteByte('^')
reverse := bytes.NewBufferString("")
var end int
var err error
for i := 0; i < len(idxs); i += 2 {
// Set all values we are interested in.
raw := tpl[end:idxs[i]]
end = idxs[i+1]
parts := strings.SplitN(tpl[idxs[i]+1:end-1], ":", 2)
name := parts[0]
patt := defaultPattern
if len(parts) == 2 {
patt = parts[1]
}
// Name or pattern can't be empty.
if name == "" || patt == "" {
return nil, fmt.Errorf("mux: missing name or pattern in %q",
tpl[idxs[i]:end])
}
// Build the regexp pattern.
fmt.Fprintf(pattern, "%s(?P<%s>%s)", regexp.QuoteMeta(raw), varGroupName(i/2), patt)
// Build the reverse template.
fmt.Fprintf(reverse, "%s%%s", raw)
// Append variable name and compiled pattern.
varsN[i/2] = name
varsR[i/2], err = regexp.Compile(fmt.Sprintf("^%s$", patt))
if err != nil {
return nil, err
}
}
// Add the remaining.
raw := tpl[end:]
pattern.WriteString(regexp.QuoteMeta(raw))
if strictSlash {
pattern.WriteString("[/]?")
}
if matchQuery {
// Add the default pattern if the query value is empty
if queryVal := strings.SplitN(template, "=", 2)[1]; queryVal == "" {
pattern.WriteString(defaultPattern)
}
}
if !matchPrefix {
pattern.WriteByte('$')
}
reverse.WriteString(raw)
if endSlash {
reverse.WriteByte('/')
}
// Compile full regexp.
reg, errCompile := regexp.Compile(pattern.String())
if errCompile != nil {
return nil, errCompile
}
// Check for capturing groups which used to work in older versions
if reg.NumSubexp() != len(idxs)/2 {
panic(fmt.Sprintf("route %s contains capture groups in its regexp. ", template) +
"Only non-capturing groups are accepted: e.g. (?:pattern) instead of (pattern)")
}
// Done!
return &routeRegexp{
template: template,
matchHost: matchHost,
matchQuery: matchQuery,
strictSlash: strictSlash,
useEncodedPath: useEncodedPath,
regexp: reg,
reverse: reverse.String(),
varsN: varsN,
varsR: varsR,
}, nil
}
// routeRegexp stores a regexp to match a host or path and information to
// collect and validate route variables.
type routeRegexp struct {
// The unmodified template.
template string
// True for host match, false for path or query string match.
matchHost bool
// True for query string match, false for path and host match.
matchQuery bool
// The strictSlash value defined on the route, but disabled if PathPrefix was used.
strictSlash bool
// Determines whether to use encoded path from getPath function or unencoded
// req.URL.Path for path matching
useEncodedPath bool
// Expanded regexp.
regexp *regexp.Regexp
// Reverse template.
reverse string
// Variable names.
varsN []string
// Variable regexps (validators).
varsR []*regexp.Regexp
}
// Match matches the regexp against the URL host or path.
func (r *routeRegexp) Match(req *http.Request, match *RouteMatch) bool {
if !r.matchHost {
if r.matchQuery {
return r.matchQueryString(req)
}
path := req.URL.Path
if r.useEncodedPath {
path = getPath(req)
}
return r.regexp.MatchString(path)
}
return r.regexp.MatchString(getHost(req))
}
// url builds a URL part using the given values.
func (r *routeRegexp) url(values map[string]string) (string, error) {
urlValues := make([]interface{}, len(r.varsN))
for k, v := range r.varsN {
value, ok := values[v]
if !ok {
return "", fmt.Errorf("mux: missing route variable %q", v)
}
urlValues[k] = value
}
rv := fmt.Sprintf(r.reverse, urlValues...)
if !r.regexp.MatchString(rv) {
// The URL is checked against the full regexp, instead of checking
// individual variables. This is faster but to provide a good error
// message, we check individual regexps if the URL doesn't match.
for k, v := range r.varsN {
if !r.varsR[k].MatchString(values[v]) {
return "", fmt.Errorf(
"mux: variable %q doesn't match, expected %q", values[v],
r.varsR[k].String())
}
}
}
return rv, nil
}
// getURLQuery returns a single query parameter from a request URL.
// For a URL with foo=bar&baz=ding, we return only the relevant key
// value pair for the routeRegexp.
func (r *routeRegexp) getURLQuery(req *http.Request) string {
if !r.matchQuery {
return ""
}
templateKey := strings.SplitN(r.template, "=", 2)[0]
for key, vals := range req.URL.Query() {
if key == templateKey && len(vals) > 0 {
return key + "=" + vals[0]
}
}
return ""
}
func (r *routeRegexp) matchQueryString(req *http.Request) bool {
return r.regexp.MatchString(r.getURLQuery(req))
}
// braceIndices returns the first level curly brace indices from a string.
// It returns an error in case of unbalanced braces.
func braceIndices(s string) ([]int, error) {
var level, idx int
var idxs []int
for i := 0; i < len(s); i++ {
switch s[i] {
case '{':
if level++; level == 1 {
idx = i
}
case '}':
if level--; level == 0 {
idxs = append(idxs, idx, i+1)
} else if level < 0 {
return nil, fmt.Errorf("mux: unbalanced braces in %q", s)
}
}
}
if level != 0 {
return nil, fmt.Errorf("mux: unbalanced braces in %q", s)
}
return idxs, nil
}
// varGroupName builds a capturing group name for the indexed variable.
func varGroupName(idx int) string {
return "v" + strconv.Itoa(idx)
}
// ----------------------------------------------------------------------------
// routeRegexpGroup
// ----------------------------------------------------------------------------
// routeRegexpGroup groups the route matchers that carry variables.
type routeRegexpGroup struct {
host *routeRegexp
path *routeRegexp
queries []*routeRegexp
}
// setMatch extracts the variables from the URL once a route matches.
func (v *routeRegexpGroup) setMatch(req *http.Request, m *RouteMatch, r *Route) {
// Store host variables.
if v.host != nil {
host := getHost(req)
matches := v.host.regexp.FindStringSubmatchIndex(host)
if len(matches) > 0 {
extractVars(host, matches, v.host.varsN, m.Vars)
}
}
path := req.URL.Path
if r.useEncodedPath {
path = getPath(req)
}
// Store path variables.
if v.path != nil {
matches := v.path.regexp.FindStringSubmatchIndex(path)
if len(matches) > 0 {
extractVars(path, matches, v.path.varsN, m.Vars)
// Check if we should redirect.
if v.path.strictSlash {
p1 := strings.HasSuffix(path, "/")
p2 := strings.HasSuffix(v.path.template, "/")
if p1 != p2 {
u, _ := url.Parse(req.URL.String())
if p1 {
u.Path = u.Path[:len(u.Path)-1]
} else {
u.Path += "/"
}
m.Handler = http.RedirectHandler(u.String(), 301)
}
}
}
}
// Store query string variables.
for _, q := range v.queries {
queryURL := q.getURLQuery(req)
matches := q.regexp.FindStringSubmatchIndex(queryURL)
if len(matches) > 0 {
extractVars(queryURL, matches, q.varsN, m.Vars)
}
}
}
// getHost tries its best to return the request host.
func getHost(r *http.Request) string {
if r.URL.IsAbs() {
return r.URL.Host
}
host := r.Host
// Slice off any port information.
if i := strings.Index(host, ":"); i != -1 {
host = host[:i]
}
return host
}
func extractVars(input string, matches []int, names []string, output map[string]string) {
for i, name := range names {
output[name] = input[matches[2*i+2]:matches[2*i+3]]
}
}

636
vendor/github.com/gorilla/mux/route.go generated vendored Normal file
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// Copyright 2012 The Gorilla Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package mux
import (
"errors"
"fmt"
"net/http"
"net/url"
"regexp"
"strings"
)
// Route stores information to match a request and build URLs.
type Route struct {
// Parent where the route was registered (a Router).
parent parentRoute
// Request handler for the route.
handler http.Handler
// List of matchers.
matchers []matcher
// Manager for the variables from host and path.
regexp *routeRegexpGroup
// If true, when the path pattern is "/path/", accessing "/path" will
// redirect to the former and vice versa.
strictSlash bool
// If true, when the path pattern is "/path//to", accessing "/path//to"
// will not redirect
skipClean bool
// If true, "/path/foo%2Fbar/to" will match the path "/path/{var}/to"
useEncodedPath bool
// If true, this route never matches: it is only used to build URLs.
buildOnly bool
// The name used to build URLs.
name string
// Error resulted from building a route.
err error
buildVarsFunc BuildVarsFunc
}
func (r *Route) SkipClean() bool {
return r.skipClean
}
// Match matches the route against the request.
func (r *Route) Match(req *http.Request, match *RouteMatch) bool {
if r.buildOnly || r.err != nil {
return false
}
// Match everything.
for _, m := range r.matchers {
if matched := m.Match(req, match); !matched {
return false
}
}
// Yay, we have a match. Let's collect some info about it.
if match.Route == nil {
match.Route = r
}
if match.Handler == nil {
match.Handler = r.handler
}
if match.Vars == nil {
match.Vars = make(map[string]string)
}
// Set variables.
if r.regexp != nil {
r.regexp.setMatch(req, match, r)
}
return true
}
// ----------------------------------------------------------------------------
// Route attributes
// ----------------------------------------------------------------------------
// GetError returns an error resulted from building the route, if any.
func (r *Route) GetError() error {
return r.err
}
// BuildOnly sets the route to never match: it is only used to build URLs.
func (r *Route) BuildOnly() *Route {
r.buildOnly = true
return r
}
// Handler --------------------------------------------------------------------
// Handler sets a handler for the route.
func (r *Route) Handler(handler http.Handler) *Route {
if r.err == nil {
r.handler = handler
}
return r
}
// HandlerFunc sets a handler function for the route.
func (r *Route) HandlerFunc(f func(http.ResponseWriter, *http.Request)) *Route {
return r.Handler(http.HandlerFunc(f))
}
// GetHandler returns the handler for the route, if any.
func (r *Route) GetHandler() http.Handler {
return r.handler
}
// Name -----------------------------------------------------------------------
// Name sets the name for the route, used to build URLs.
// If the name was registered already it will be overwritten.
func (r *Route) Name(name string) *Route {
if r.name != "" {
r.err = fmt.Errorf("mux: route already has name %q, can't set %q",
r.name, name)
}
if r.err == nil {
r.name = name
r.getNamedRoutes()[name] = r
}
return r
}
// GetName returns the name for the route, if any.
func (r *Route) GetName() string {
return r.name
}
// ----------------------------------------------------------------------------
// Matchers
// ----------------------------------------------------------------------------
// matcher types try to match a request.
type matcher interface {
Match(*http.Request, *RouteMatch) bool
}
// addMatcher adds a matcher to the route.
func (r *Route) addMatcher(m matcher) *Route {
if r.err == nil {
r.matchers = append(r.matchers, m)
}
return r
}
// addRegexpMatcher adds a host or path matcher and builder to a route.
func (r *Route) addRegexpMatcher(tpl string, matchHost, matchPrefix, matchQuery bool) error {
if r.err != nil {
return r.err
}
r.regexp = r.getRegexpGroup()
if !matchHost && !matchQuery {
if tpl == "/" && (len(tpl) == 0 || tpl[0] != '/') {
return fmt.Errorf("mux: path must start with a slash, got %q", tpl)
}
if r.regexp.path != nil {
tpl = strings.TrimRight(r.regexp.path.template, "/") + tpl
}
}
rr, err := newRouteRegexp(tpl, matchHost, matchPrefix, matchQuery, r.strictSlash, r.useEncodedPath)
if err != nil {
return err
}
for _, q := range r.regexp.queries {
if err = uniqueVars(rr.varsN, q.varsN); err != nil {
return err
}
}
if matchHost {
if r.regexp.path != nil {
if err = uniqueVars(rr.varsN, r.regexp.path.varsN); err != nil {
return err
}
}
r.regexp.host = rr
} else {
if r.regexp.host != nil {
if err = uniqueVars(rr.varsN, r.regexp.host.varsN); err != nil {
return err
}
}
if matchQuery {
r.regexp.queries = append(r.regexp.queries, rr)
} else {
r.regexp.path = rr
}
}
r.addMatcher(rr)
return nil
}
// Headers --------------------------------------------------------------------
// headerMatcher matches the request against header values.
type headerMatcher map[string]string
func (m headerMatcher) Match(r *http.Request, match *RouteMatch) bool {
return matchMapWithString(m, r.Header, true)
}
// Headers adds a matcher for request header values.
// It accepts a sequence of key/value pairs to be matched. For example:
//
// r := mux.NewRouter()
// r.Headers("Content-Type", "application/json",
// "X-Requested-With", "XMLHttpRequest")
//
// The above route will only match if both request header values match.
// If the value is an empty string, it will match any value if the key is set.
func (r *Route) Headers(pairs ...string) *Route {
if r.err == nil {
var headers map[string]string
headers, r.err = mapFromPairsToString(pairs...)
return r.addMatcher(headerMatcher(headers))
}
return r
}
// headerRegexMatcher matches the request against the route given a regex for the header
type headerRegexMatcher map[string]*regexp.Regexp
func (m headerRegexMatcher) Match(r *http.Request, match *RouteMatch) bool {
return matchMapWithRegex(m, r.Header, true)
}
// HeadersRegexp accepts a sequence of key/value pairs, where the value has regex
// support. For example:
//
// r := mux.NewRouter()
// r.HeadersRegexp("Content-Type", "application/(text|json)",
// "X-Requested-With", "XMLHttpRequest")
//
// The above route will only match if both the request header matches both regular expressions.
// It the value is an empty string, it will match any value if the key is set.
func (r *Route) HeadersRegexp(pairs ...string) *Route {
if r.err == nil {
var headers map[string]*regexp.Regexp
headers, r.err = mapFromPairsToRegex(pairs...)
return r.addMatcher(headerRegexMatcher(headers))
}
return r
}
// Host -----------------------------------------------------------------------
// Host adds a matcher for the URL host.
// It accepts a template with zero or more URL variables enclosed by {}.
// Variables can define an optional regexp pattern to be matched:
//
// - {name} matches anything until the next dot.
//
// - {name:pattern} matches the given regexp pattern.
//
// For example:
//
// r := mux.NewRouter()
// r.Host("www.example.com")
// r.Host("{subdomain}.domain.com")
// r.Host("{subdomain:[a-z]+}.domain.com")
//
// Variable names must be unique in a given route. They can be retrieved
// calling mux.Vars(request).
func (r *Route) Host(tpl string) *Route {
r.err = r.addRegexpMatcher(tpl, true, false, false)
return r
}
// MatcherFunc ----------------------------------------------------------------
// MatcherFunc is the function signature used by custom matchers.
type MatcherFunc func(*http.Request, *RouteMatch) bool
// Match returns the match for a given request.
func (m MatcherFunc) Match(r *http.Request, match *RouteMatch) bool {
return m(r, match)
}
// MatcherFunc adds a custom function to be used as request matcher.
func (r *Route) MatcherFunc(f MatcherFunc) *Route {
return r.addMatcher(f)
}
// Methods --------------------------------------------------------------------
// methodMatcher matches the request against HTTP methods.
type methodMatcher []string
func (m methodMatcher) Match(r *http.Request, match *RouteMatch) bool {
return matchInArray(m, r.Method)
}
// Methods adds a matcher for HTTP methods.
// It accepts a sequence of one or more methods to be matched, e.g.:
// "GET", "POST", "PUT".
func (r *Route) Methods(methods ...string) *Route {
for k, v := range methods {
methods[k] = strings.ToUpper(v)
}
return r.addMatcher(methodMatcher(methods))
}
// Path -----------------------------------------------------------------------
// Path adds a matcher for the URL path.
// It accepts a template with zero or more URL variables enclosed by {}. The
// template must start with a "/".
// Variables can define an optional regexp pattern to be matched:
//
// - {name} matches anything until the next slash.
//
// - {name:pattern} matches the given regexp pattern.
//
// For example:
//
// r := mux.NewRouter()
// r.Path("/products/").Handler(ProductsHandler)
// r.Path("/products/{key}").Handler(ProductsHandler)
// r.Path("/articles/{category}/{id:[0-9]+}").
// Handler(ArticleHandler)
//
// Variable names must be unique in a given route. They can be retrieved
// calling mux.Vars(request).
func (r *Route) Path(tpl string) *Route {
r.err = r.addRegexpMatcher(tpl, false, false, false)
return r
}
// PathPrefix -----------------------------------------------------------------
// PathPrefix adds a matcher for the URL path prefix. This matches if the given
// template is a prefix of the full URL path. See Route.Path() for details on
// the tpl argument.
//
// Note that it does not treat slashes specially ("/foobar/" will be matched by
// the prefix "/foo") so you may want to use a trailing slash here.
//
// Also note that the setting of Router.StrictSlash() has no effect on routes
// with a PathPrefix matcher.
func (r *Route) PathPrefix(tpl string) *Route {
r.err = r.addRegexpMatcher(tpl, false, true, false)
return r
}
// Query ----------------------------------------------------------------------
// Queries adds a matcher for URL query values.
// It accepts a sequence of key/value pairs. Values may define variables.
// For example:
//
// r := mux.NewRouter()
// r.Queries("foo", "bar", "id", "{id:[0-9]+}")
//
// The above route will only match if the URL contains the defined queries
// values, e.g.: ?foo=bar&id=42.
//
// It the value is an empty string, it will match any value if the key is set.
//
// Variables can define an optional regexp pattern to be matched:
//
// - {name} matches anything until the next slash.
//
// - {name:pattern} matches the given regexp pattern.
func (r *Route) Queries(pairs ...string) *Route {
length := len(pairs)
if length%2 != 0 {
r.err = fmt.Errorf(
"mux: number of parameters must be multiple of 2, got %v", pairs)
return nil
}
for i := 0; i < length; i += 2 {
if r.err = r.addRegexpMatcher(pairs[i]+"="+pairs[i+1], false, false, true); r.err != nil {
return r
}
}
return r
}
// Schemes --------------------------------------------------------------------
// schemeMatcher matches the request against URL schemes.
type schemeMatcher []string
func (m schemeMatcher) Match(r *http.Request, match *RouteMatch) bool {
return matchInArray(m, r.URL.Scheme)
}
// Schemes adds a matcher for URL schemes.
// It accepts a sequence of schemes to be matched, e.g.: "http", "https".
func (r *Route) Schemes(schemes ...string) *Route {
for k, v := range schemes {
schemes[k] = strings.ToLower(v)
}
return r.addMatcher(schemeMatcher(schemes))
}
// BuildVarsFunc --------------------------------------------------------------
// BuildVarsFunc is the function signature used by custom build variable
// functions (which can modify route variables before a route's URL is built).
type BuildVarsFunc func(map[string]string) map[string]string
// BuildVarsFunc adds a custom function to be used to modify build variables
// before a route's URL is built.
func (r *Route) BuildVarsFunc(f BuildVarsFunc) *Route {
r.buildVarsFunc = f
return r
}
// Subrouter ------------------------------------------------------------------
// Subrouter creates a subrouter for the route.
//
// It will test the inner routes only if the parent route matched. For example:
//
// r := mux.NewRouter()
// s := r.Host("www.example.com").Subrouter()
// s.HandleFunc("/products/", ProductsHandler)
// s.HandleFunc("/products/{key}", ProductHandler)
// s.HandleFunc("/articles/{category}/{id:[0-9]+}"), ArticleHandler)
//
// Here, the routes registered in the subrouter won't be tested if the host
// doesn't match.
func (r *Route) Subrouter() *Router {
router := &Router{parent: r, strictSlash: r.strictSlash}
r.addMatcher(router)
return router
}
// ----------------------------------------------------------------------------
// URL building
// ----------------------------------------------------------------------------
// URL builds a URL for the route.
//
// It accepts a sequence of key/value pairs for the route variables. For
// example, given this route:
//
// r := mux.NewRouter()
// r.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler).
// Name("article")
//
// ...a URL for it can be built using:
//
// url, err := r.Get("article").URL("category", "technology", "id", "42")
//
// ...which will return an url.URL with the following path:
//
// "/articles/technology/42"
//
// This also works for host variables:
//
// r := mux.NewRouter()
// r.Host("{subdomain}.domain.com").
// HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler).
// Name("article")
//
// // url.String() will be "http://news.domain.com/articles/technology/42"
// url, err := r.Get("article").URL("subdomain", "news",
// "category", "technology",
// "id", "42")
//
// All variables defined in the route are required, and their values must
// conform to the corresponding patterns.
func (r *Route) URL(pairs ...string) (*url.URL, error) {
if r.err != nil {
return nil, r.err
}
if r.regexp == nil {
return nil, errors.New("mux: route doesn't have a host or path")
}
values, err := r.prepareVars(pairs...)
if err != nil {
return nil, err
}
var scheme, host, path string
if r.regexp.host != nil {
// Set a default scheme.
scheme = "http"
if host, err = r.regexp.host.url(values); err != nil {
return nil, err
}
}
if r.regexp.path != nil {
if path, err = r.regexp.path.url(values); err != nil {
return nil, err
}
}
return &url.URL{
Scheme: scheme,
Host: host,
Path: path,
}, nil
}
// URLHost builds the host part of the URL for a route. See Route.URL().
//
// The route must have a host defined.
func (r *Route) URLHost(pairs ...string) (*url.URL, error) {
if r.err != nil {
return nil, r.err
}
if r.regexp == nil || r.regexp.host == nil {
return nil, errors.New("mux: route doesn't have a host")
}
values, err := r.prepareVars(pairs...)
if err != nil {
return nil, err
}
host, err := r.regexp.host.url(values)
if err != nil {
return nil, err
}
return &url.URL{
Scheme: "http",
Host: host,
}, nil
}
// URLPath builds the path part of the URL for a route. See Route.URL().
//
// The route must have a path defined.
func (r *Route) URLPath(pairs ...string) (*url.URL, error) {
if r.err != nil {
return nil, r.err
}
if r.regexp == nil || r.regexp.path == nil {
return nil, errors.New("mux: route doesn't have a path")
}
values, err := r.prepareVars(pairs...)
if err != nil {
return nil, err
}
path, err := r.regexp.path.url(values)
if err != nil {
return nil, err
}
return &url.URL{
Path: path,
}, nil
}
// GetPathTemplate returns the template used to build the
// route match.
// This is useful for building simple REST API documentation and for instrumentation
// against third-party services.
// An error will be returned if the route does not define a path.
func (r *Route) GetPathTemplate() (string, error) {
if r.err != nil {
return "", r.err
}
if r.regexp == nil || r.regexp.path == nil {
return "", errors.New("mux: route doesn't have a path")
}
return r.regexp.path.template, nil
}
// GetHostTemplate returns the template used to build the
// route match.
// This is useful for building simple REST API documentation and for instrumentation
// against third-party services.
// An error will be returned if the route does not define a host.
func (r *Route) GetHostTemplate() (string, error) {
if r.err != nil {
return "", r.err
}
if r.regexp == nil || r.regexp.host == nil {
return "", errors.New("mux: route doesn't have a host")
}
return r.regexp.host.template, nil
}
// prepareVars converts the route variable pairs into a map. If the route has a
// BuildVarsFunc, it is invoked.
func (r *Route) prepareVars(pairs ...string) (map[string]string, error) {
m, err := mapFromPairsToString(pairs...)
if err != nil {
return nil, err
}
return r.buildVars(m), nil
}
func (r *Route) buildVars(m map[string]string) map[string]string {
if r.parent != nil {
m = r.parent.buildVars(m)
}
if r.buildVarsFunc != nil {
m = r.buildVarsFunc(m)
}
return m
}
// ----------------------------------------------------------------------------
// parentRoute
// ----------------------------------------------------------------------------
// parentRoute allows routes to know about parent host and path definitions.
type parentRoute interface {
getNamedRoutes() map[string]*Route
getRegexpGroup() *routeRegexpGroup
buildVars(map[string]string) map[string]string
}
// getNamedRoutes returns the map where named routes are registered.
func (r *Route) getNamedRoutes() map[string]*Route {
if r.parent == nil {
// During tests router is not always set.
r.parent = NewRouter()
}
return r.parent.getNamedRoutes()
}
// getRegexpGroup returns regexp definitions from this route.
func (r *Route) getRegexpGroup() *routeRegexpGroup {
if r.regexp == nil {
if r.parent == nil {
// During tests router is not always set.
r.parent = NewRouter()
}
regexp := r.parent.getRegexpGroup()
if regexp == nil {
r.regexp = new(routeRegexpGroup)
} else {
// Copy.
r.regexp = &routeRegexpGroup{
host: regexp.host,
path: regexp.path,
queries: regexp.queries,
}
}
}
return r.regexp
}

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Copyright (c) 2017 Tobias Fuhrimann
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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# Adapters
Adapters is a collection of useful HTTP middleware or "Adapters". They follow the Adapter Pattern described by Mat Ryer in his blog post [Writing middleware in #golang and how Go makes it so much fun.](https://medium.com/@matryer/writing-middleware-in-golang-and-how-go-makes-it-so-much-fun-4375c1246e81)
Adapters can be chained in any way and will be executed in the order they are specified.
## Usage
```go
package main
import (
"fmt"
"log"
"net/http"
"github.com/mastertinner/adapters"
"github.com/mastertinner/adapters/logging"
)
// IndexHandler says what it loves
func IndexHandler() http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "Hi there, I love %s!", r.URL.Path[1:])
})
}
func main() {
logger := log.New(os.Stdout, "", log.Ldate|log.Ltime)
http.Handle("/", adapters.Adapt(IndexHandler(), logging.Handler(logger)))
log.Fatal(http.ListenAndServe(":8080", nil))
}
```
## Adapters
This package contains the following adapters:
* Logging: Logs the request and the time it took to serve it
* OAuth2: Checks if a request is authenticated through [OAuth 2](https://oauth.net/2/) using [Redis](https://redis.io/) as a cache

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package adapters
import "net/http"
// Adapt adds adapters to an HTTP handler.
func Adapt(h http.Handler, adapters ...Adapter) http.Handler {
for i := len(adapters) - 1; i >= 0; i-- {
h = adapters[i](h)
}
return h
}

6
vendor/github.com/mastertinner/adapters/adapter.go generated vendored Normal file
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package adapters
import "net/http"
// Adapter is an HTTP middleware.
type Adapter func(http.Handler) http.Handler

27
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package logging
import (
"log"
"net/http"
"time"
"github.com/mastertinner/adapters"
)
// Handler logs HTTP requests.
func Handler(logger *log.Logger) adapters.Adapter {
return func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
defer func(start time.Time) {
logger.Printf(
"%s\t%s\t%s",
r.Method,
r.RequestURI,
time.Since(start),
)
}(time.Now())
next.ServeHTTP(w, r)
})
}
}

1
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vendor

38
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hash: 2930195423c156b85ae0be9ef95d0dfcaa988b54bba4f088f767f05b3a108912
updated: 2017-05-01T10:50:48.686241497+02:00
imports:
- name: github.com/golang/protobuf
version: 69b215d01a5606c843240eab4937eab3acee6530
subpackages:
- proto
- name: github.com/mastertinner/adapters
version: 5510790dd79e084a0b849ec99df4403af9344b45
- name: github.com/satori/go.uuid
version: 879c5887cd475cd7864858769793b2ceb0d44feb
- name: golang.org/x/net
version: 6b27048ae5e6ad1ef927e72e437531493de612fe
subpackages:
- context
- name: golang.org/x/oauth2
version: b9780ec78894ab900c062d58ee3076cd9b2a4501
subpackages:
- internal
- name: google.golang.org/appengine
version: 2e4a801b39fc199db615bfca7d0b9f8cd9580599
subpackages:
- internal
- internal/base
- internal/datastore
- internal/log
- internal/remote_api
- internal/urlfetch
- urlfetch
- name: gopkg.in/redis.v5
version: a16aeec10ff407b1e7be6dd35797ccf5426ef0f0
subpackages:
- internal
- internal/consistenthash
- internal/hashtag
- internal/pool
- internal/proto
testImports: []

7
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package: github.com/mastertinner/adapters/oauth2
import:
- package: golang.org/x/oauth2
- package: gopkg.in/redis.v5
version: ^5.2.9
- package: github.com/satori/go.uuid
version: ^1.1.0

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package oauth2
import (
"context"
"encoding/json"
"errors"
"log"
"net/http"
"strings"
"time"
"gopkg.in/redis.v5"
"github.com/mastertinner/adapters"
"github.com/satori/go.uuid"
"golang.org/x/oauth2"
)
const (
cookieName = "sess_cookie"
tokenExpiration = 4 * 24 * time.Hour
)
// tokenWithScope is an OAuth2 token with its scope.
type tokenWithScope struct {
Token *oauth2.Token
Scope string
}
// Handler checks if a request is authenticated through OAuth2.
func Handler(cache *redis.Client, config *oauth2.Config, stateString string, tokenContextKey interface{}, scopeContextKey interface{}) adapters.Adapter {
return func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
var sessionCookie *http.Cookie
cookies := r.Cookies()
// Get session cookie from cookies
for _, c := range cookies {
if strings.EqualFold(c.Name, cookieName) {
sessionCookie = c
break
}
}
if sessionCookie == nil {
url := config.AuthCodeURL(stateString, oauth2.AccessTypeOnline)
http.Redirect(w, r, url, http.StatusTemporaryRedirect)
return
}
tok, err := tokenFromCache(cache, sessionCookie.Value)
if err != nil || tok.Token == nil || !tok.Token.Valid() {
url := config.AuthCodeURL(stateString, oauth2.AccessTypeOnline)
http.Redirect(w, r, url, http.StatusTemporaryRedirect)
return
}
ctx := r.Context()
ctx = context.WithValue(ctx, tokenContextKey, tok.Token)
ctx = context.WithValue(ctx, scopeContextKey, tok.Scope)
r = r.WithContext(ctx)
next.ServeHTTP(w, r)
})
}
}
// CallbackHandler creates a token and saves it to the cache.
func CallbackHandler(cache *redis.Client, config *oauth2.Config, stateString string) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
err := r.ParseForm()
if err != nil {
code := http.StatusInternalServerError
http.Error(w, http.StatusText(code), code)
return
}
state := r.FormValue("state")
if state != stateString {
url := config.AuthCodeURL(stateString, oauth2.AccessTypeOnline)
http.Redirect(w, r, url, http.StatusTemporaryRedirect)
return
}
code := r.FormValue("code")
t, err := config.Exchange(context.Background(), code)
if err != nil {
url := config.AuthCodeURL(stateString, oauth2.AccessTypeOnline)
http.Redirect(w, r, url, http.StatusTemporaryRedirect)
return
}
// Add scope to token info
tok := &tokenWithScope{
Token: t,
Scope: t.Extra("scope").(string),
}
cookieVal := uuid.NewV4().String()
// Setup the cookie and set it
cookieToSend := &http.Cookie{
Name: cookieName,
Value: cookieVal,
MaxAge: 0,
Secure: false,
HttpOnly: false,
}
http.SetCookie(w, cookieToSend)
// Serialize token and insert to cache
srlzdToken, err := json.Marshal(&tok)
if err != nil {
log.Println("error marshalling token:", err.Error())
url := config.AuthCodeURL(stateString, oauth2.AccessTypeOnline)
http.Redirect(w, r, url, http.StatusTemporaryRedirect)
return
}
err = cache.Set(cookieVal, srlzdToken, tokenExpiration).Err()
if err != nil {
log.Println("error adding token to cache:", err.Error())
url := config.AuthCodeURL(stateString, oauth2.AccessTypeOnline)
http.Redirect(w, r, url, http.StatusTemporaryRedirect)
return
}
http.Redirect(w, r, "/", http.StatusTemporaryRedirect)
})
}
// tokenFromCache retrieves a tokenURL from the cache.
func tokenFromCache(cache *redis.Client, cookieID string) (*tokenWithScope, error) {
serializedToken, err := cache.Get(cookieID).Result()
if err != nil {
return nil, errors.New("error finding token in cache")
}
var tok *tokenWithScope
err = json.Unmarshal([]byte(serializedToken), &tok)
if err != nil || tok == nil {
return nil, errors.New("error unmarshalling token")
}
return tok, nil
}

2
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*~
*.test

20
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sudo: false
language: go
os:
- linux
env:
- ARCH=x86_64
- ARCH=i686
go:
- 1.5.3
- 1.6
- 1.7.4
- 1.8
script:
- diff -au <(gofmt -d .) <(printf "")
- go vet ./...
- go test -short -race -v ./...

23
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### Developer Guidelines
``minio-go`` welcomes your contribution. To make the process as seamless as possible, we ask for the following:
* Go ahead and fork the project and make your changes. We encourage pull requests to discuss code changes.
- Fork it
- Create your feature branch (git checkout -b my-new-feature)
- Commit your changes (git commit -am 'Add some feature')
- Push to the branch (git push origin my-new-feature)
- Create new Pull Request
* When you're ready to create a pull request, be sure to:
- Have test cases for the new code. If you have questions about how to do it, please ask in your pull request.
- Run `go fmt`
- Squash your commits into a single commit. `git rebase -i`. It's okay to force update your pull request.
- Make sure `go test -race ./...` and `go build` completes.
NOTE: go test runs functional tests and requires you to have a AWS S3 account. Set them as environment variables
``ACCESS_KEY`` and ``SECRET_KEY``. To run shorter version of the tests please use ``go test -short -race ./...``
* Read [Effective Go](https://github.com/golang/go/wiki/CodeReviewComments) article from Golang project
- `minio-go` project is strictly conformant with Golang style
- if you happen to observe offending code, please feel free to send a pull request

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Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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"License" shall mean the terms and conditions for use, reproduction,
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"Work" shall mean the work of authorship, whether in Source or
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4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
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meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
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within a display generated by the Derivative Works, if and
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of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
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as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
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5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
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Copyright [yyyy] [name of copyright owner]
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Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

19
vendor/github.com/minio/minio-go/MAINTAINERS.md generated vendored Normal file
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# For maintainers only
## Responsibilities
Please go through this link [Maintainer Responsibility](https://gist.github.com/abperiasamy/f4d9b31d3186bbd26522)
### Making new releases
Edit `libraryVersion` constant in `api.go`.
```
$ grep libraryVersion api.go
libraryVersion = "0.3.0"
```
```
$ git tag 0.3.0
$ git push --tags
```

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# Minio Go Client SDK for Amazon S3 Compatible Cloud Storage [![Slack](https://slack.minio.io/slack?type=svg)](https://slack.minio.io) [![Sourcegraph](https://sourcegraph.com/github.com/minio/minio-go/-/badge.svg)](https://sourcegraph.com/github.com/minio/minio-go?badge)
The Minio Go Client SDK provides simple APIs to access any Amazon S3 compatible object storage.
**Supported cloud storage providers:**
- AWS Signature Version 4
- Amazon S3
- Minio
- AWS Signature Version 2
- Google Cloud Storage (Compatibility Mode)
- Openstack Swift + Swift3 middleware
- Ceph Object Gateway
- Riak CS
This quickstart guide will show you how to install the Minio client SDK, connect to Minio, and provide a walkthrough for a simple file uploader. For a complete list of APIs and examples, please take a look at the [Go Client API Reference](https://docs.minio.io/docs/golang-client-api-reference).
This document assumes that you have a working [Go development environment](https://docs.minio.io/docs/how-to-install-golang).
## Download from Github
```sh
go get -u github.com/minio/minio-go
```
## Initialize Minio Client
Minio client requires the following four parameters specified to connect to an Amazon S3 compatible object storage.
| Parameter | Description|
| :--- | :--- |
| endpoint | URL to object storage service. |
| accessKeyID | Access key is the user ID that uniquely identifies your account. |
| secretAccessKey | Secret key is the password to your account. |
| secure | Set this value to 'true' to enable secure (HTTPS) access. |
```go
package main
import (
"github.com/minio/minio-go"
"log"
)
func main() {
endpoint := "play.minio.io:9000"
accessKeyID := "Q3AM3UQ867SPQQA43P2F"
secretAccessKey := "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG"
useSSL := true
// Initialize minio client object.
minioClient, err := minio.New(endpoint, accessKeyID, secretAccessKey, useSSL)
if err != nil {
log.Fatalln(err)
}
log.Println("%v", minioClient) // minioClient is now setup
```
## Quick Start Example - File Uploader
This example program connects to an object storage server, creates a bucket and uploads a file to the bucket.
We will use the Minio server running at [https://play.minio.io:9000](https://play.minio.io:9000) in this example. Feel free to use this service for testing and development. Access credentials shown in this example are open to the public.
### FileUploader.go
```go
package main
import (
"github.com/minio/minio-go"
"log"
)
func main() {
endpoint := "play.minio.io:9000"
accessKeyID := "Q3AM3UQ867SPQQA43P2F"
secretAccessKey := "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG"
useSSL := true
// Initialize minio client object.
minioClient, err := minio.New(endpoint, accessKeyID, secretAccessKey, useSSL)
if err != nil {
log.Fatalln(err)
}
// Make a new bucket called mymusic.
bucketName := "mymusic"
location := "us-east-1"
err = minioClient.MakeBucket(bucketName, location)
if err != nil {
// Check to see if we already own this bucket (which happens if you run this twice)
exists, err := minioClient.BucketExists(bucketName)
if err == nil && exists {
log.Printf("We already own %s\n", bucketName)
} else {
log.Fatalln(err)
}
}
log.Printf("Successfully created %s\n", bucketName)
// Upload the zip file
objectName := "golden-oldies.zip"
filePath := "/tmp/golden-oldies.zip"
contentType := "application/zip"
// Upload the zip file with FPutObject
n, err := minioClient.FPutObject(bucketName, objectName, filePath, contentType)
if err != nil {
log.Fatalln(err)
}
log.Printf("Successfully uploaded %s of size %d\n", objectName, n)
}
```
### Run FileUploader
```sh
go run file-uploader.go
2016/08/13 17:03:28 Successfully created mymusic
2016/08/13 17:03:40 Successfully uploaded golden-oldies.zip of size 16253413
mc ls play/mymusic/
[2016-05-27 16:02:16 PDT] 17MiB golden-oldies.zip
```
## API Reference
The full API Reference is available here.
* [Complete API Reference](https://docs.minio.io/docs/golang-client-api-reference)
### API Reference : Bucket Operations
* [`MakeBucket`](https://docs.minio.io/docs/golang-client-api-reference#MakeBucket)
* [`ListBuckets`](https://docs.minio.io/docs/golang-client-api-reference#ListBuckets)
* [`BucketExists`](https://docs.minio.io/docs/golang-client-api-reference#BucketExists)
* [`RemoveBucket`](https://docs.minio.io/docs/golang-client-api-reference#RemoveBucket)
* [`ListObjects`](https://docs.minio.io/docs/golang-client-api-reference#ListObjects)
* [`ListObjectsV2`](https://docs.minio.io/docs/golang-client-api-reference#ListObjectsV2)
* [`ListIncompleteUploads`](https://docs.minio.io/docs/golang-client-api-reference#ListIncompleteUploads)
### API Reference : Bucket policy Operations
* [`SetBucketPolicy`](https://docs.minio.io/docs/golang-client-api-reference#SetBucketPolicy)
* [`GetBucketPolicy`](https://docs.minio.io/docs/golang-client-api-reference#GetBucketPolicy)
* [`ListBucketPolicies`](https://docs.minio.io/docs/golang-client-api-reference#ListBucketPolicies)
### API Reference : Bucket notification Operations
* [`SetBucketNotification`](https://docs.minio.io/docs/golang-client-api-reference#SetBucketNotification)
* [`GetBucketNotification`](https://docs.minio.io/docs/golang-client-api-reference#GetBucketNotification)
* [`RemoveAllBucketNotification`](https://docs.minio.io/docs/golang-client-api-reference#RemoveAllBucketNotification)
* [`ListenBucketNotification`](https://docs.minio.io/docs/golang-client-api-reference#ListenBucketNotification) (Minio Extension)
### API Reference : File Object Operations
* [`FPutObject`](https://docs.minio.io/docs/golang-client-api-reference#FPutObject)
* [`FGetObject`](https://docs.minio.io/docs/golang-client-api-reference#FPutObject)
### API Reference : Object Operations
* [`GetObject`](https://docs.minio.io/docs/golang-client-api-reference#GetObject)
* [`PutObject`](https://docs.minio.io/docs/golang-client-api-reference#PutObject)
* [`PutObjectStreaming`](https://docs.minio.io/docs/golang-client-api-reference#PutObjectStreaming)
* [`StatObject`](https://docs.minio.io/docs/golang-client-api-reference#StatObject)
* [`CopyObject`](https://docs.minio.io/docs/golang-client-api-reference#CopyObject)
* [`RemoveObject`](https://docs.minio.io/docs/golang-client-api-reference#RemoveObject)
* [`RemoveObjects`](https://docs.minio.io/docs/golang-client-api-reference#RemoveObjects)
* [`RemoveIncompleteUpload`](https://docs.minio.io/docs/golang-client-api-reference#RemoveIncompleteUpload)
### API Reference: Encrypted Object Operations
* [`GetEncryptedObject`](https://docs.minio.io/docs/golang-client-api-reference#GetEncryptedObject)
* [`PutEncryptedObject`](https://docs.minio.io/docs/golang-client-api-reference#PutEncryptedObject)
### API Reference : Presigned Operations
* [`PresignedGetObject`](https://docs.minio.io/docs/golang-client-api-reference#PresignedGetObject)
* [`PresignedPutObject`](https://docs.minio.io/docs/golang-client-api-reference#PresignedPutObject)
* [`PresignedPostPolicy`](https://docs.minio.io/docs/golang-client-api-reference#PresignedPostPolicy)
### API Reference : Client custom settings
* [`SetAppInfo`](http://docs.minio.io/docs/golang-client-api-reference#SetAppInfo)
* [`SetCustomTransport`](http://docs.minio.io/docs/golang-client-api-reference#SetCustomTransport)
* [`TraceOn`](http://docs.minio.io/docs/golang-client-api-reference#TraceOn)
* [`TraceOff`](http://docs.minio.io/docs/golang-client-api-reference#TraceOff)
## Full Examples
#### Full Examples : Bucket Operations
* [makebucket.go](https://github.com/minio/minio-go/blob/master/examples/s3/makebucket.go)
* [listbuckets.go](https://github.com/minio/minio-go/blob/master/examples/s3/listbuckets.go)
* [bucketexists.go](https://github.com/minio/minio-go/blob/master/examples/s3/bucketexists.go)
* [removebucket.go](https://github.com/minio/minio-go/blob/master/examples/s3/removebucket.go)
* [listobjects.go](https://github.com/minio/minio-go/blob/master/examples/s3/listobjects.go)
* [listobjectsV2.go](https://github.com/minio/minio-go/blob/master/examples/s3/listobjectsV2.go)
* [listincompleteuploads.go](https://github.com/minio/minio-go/blob/master/examples/s3/listincompleteuploads.go)
#### Full Examples : Bucket policy Operations
* [setbucketpolicy.go](https://github.com/minio/minio-go/blob/master/examples/s3/setbucketpolicy.go)
* [getbucketpolicy.go](https://github.com/minio/minio-go/blob/master/examples/s3/getbucketpolicy.go)
* [listbucketpolicies.go](https://github.com/minio/minio-go/blob/master/examples/s3/listbucketpolicies.go)
#### Full Examples : Bucket notification Operations
* [setbucketnotification.go](https://github.com/minio/minio-go/blob/master/examples/s3/setbucketnotification.go)
* [getbucketnotification.go](https://github.com/minio/minio-go/blob/master/examples/s3/getbucketnotification.go)
* [removeallbucketnotification.go](https://github.com/minio/minio-go/blob/master/examples/s3/removeallbucketnotification.go)
* [listenbucketnotification.go](https://github.com/minio/minio-go/blob/master/examples/minio/listenbucketnotification.go) (Minio Extension)
#### Full Examples : File Object Operations
* [fputobject.go](https://github.com/minio/minio-go/blob/master/examples/s3/fputobject.go)
* [fgetobject.go](https://github.com/minio/minio-go/blob/master/examples/s3/fgetobject.go)
#### Full Examples : Object Operations
* [putobject.go](https://github.com/minio/minio-go/blob/master/examples/s3/putobject.go)
* [getobject.go](https://github.com/minio/minio-go/blob/master/examples/s3/getobject.go)
* [statobject.go](https://github.com/minio/minio-go/blob/master/examples/s3/statobject.go)
* [copyobject.go](https://github.com/minio/minio-go/blob/master/examples/s3/copyobject.go)
* [removeobject.go](https://github.com/minio/minio-go/blob/master/examples/s3/removeobject.go)
* [removeincompleteupload.go](https://github.com/minio/minio-go/blob/master/examples/s3/removeincompleteupload.go)
* [removeobjects.go](https://github.com/minio/minio-go/blob/master/examples/s3/removeobjects.go)
#### Full Examples : Encrypted Object Operations
* [put-encrypted-object.go](https://github.com/minio/minio-go/blob/master/examples/s3/put-encrypted-object.go)
* [get-encrypted-object.go](https://github.com/minio/minio-go/blob/master/examples/s3/get-encrypted-object.go)
#### Full Examples : Presigned Operations
* [presignedgetobject.go](https://github.com/minio/minio-go/blob/master/examples/s3/presignedgetobject.go)
* [presignedputobject.go](https://github.com/minio/minio-go/blob/master/examples/s3/presignedputobject.go)
* [presignedpostpolicy.go](https://github.com/minio/minio-go/blob/master/examples/s3/presignedpostpolicy.go)
## Explore Further
* [Complete Documentation](https://docs.minio.io)
* [Minio Go Client SDK API Reference](https://docs.minio.io/docs/golang-client-api-reference)
* [Go Music Player App Full Application Example](https://docs.minio.io/docs/go-music-player-app)
## Contribute
[Contributors Guide](https://github.com/minio/minio-go/blob/master/CONTRIBUTING.md)
[![Build Status](https://travis-ci.org/minio/minio-go.svg)](https://travis-ci.org/minio/minio-go)
[![Build status](https://ci.appveyor.com/api/projects/status/1d05e6nvxcelmrak?svg=true)](https://ci.appveyor.com/project/harshavardhana/minio-go)

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vendor/github.com/minio/minio-go/api-datatypes.go generated vendored Normal file
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/*
* Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2015 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package minio
import (
"net/http"
"time"
)
// BucketInfo container for bucket metadata.
type BucketInfo struct {
// The name of the bucket.
Name string `json:"name"`
// Date the bucket was created.
CreationDate time.Time `json:"creationDate"`
}
// ObjectInfo container for object metadata.
type ObjectInfo struct {
// An ETag is optionally set to md5sum of an object. In case of multipart objects,
// ETag is of the form MD5SUM-N where MD5SUM is md5sum of all individual md5sums of
// each parts concatenated into one string.
ETag string `json:"etag"`
Key string `json:"name"` // Name of the object
LastModified time.Time `json:"lastModified"` // Date and time the object was last modified.
Size int64 `json:"size"` // Size in bytes of the object.
ContentType string `json:"contentType"` // A standard MIME type describing the format of the object data.
// Collection of additional metadata on the object.
// eg: x-amz-meta-*, content-encoding etc.
Metadata http.Header `json:"metadata"`
// Owner name.
Owner struct {
DisplayName string `json:"name"`
ID string `json:"id"`
} `json:"owner"`
// The class of storage used to store the object.
StorageClass string `json:"storageClass"`
// Error
Err error `json:"-"`
}
// ObjectMultipartInfo container for multipart object metadata.
type ObjectMultipartInfo struct {
// Date and time at which the multipart upload was initiated.
Initiated time.Time `type:"timestamp" timestampFormat:"iso8601"`
Initiator initiator
Owner owner
// The type of storage to use for the object. Defaults to 'STANDARD'.
StorageClass string
// Key of the object for which the multipart upload was initiated.
Key string
// Size in bytes of the object.
Size int64
// Upload ID that identifies the multipart upload.
UploadID string `xml:"UploadId"`
// Error
Err error
}

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vendor/github.com/minio/minio-go/api-error-response.go generated vendored Normal file
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/*
* Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2015, 2016, 2017 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package minio
import (
"encoding/xml"
"fmt"
"net/http"
"strconv"
)
/* **** SAMPLE ERROR RESPONSE ****
<?xml version="1.0" encoding="UTF-8"?>
<Error>
<Code>AccessDenied</Code>
<Message>Access Denied</Message>
<BucketName>bucketName</BucketName>
<Key>objectName</Key>
<RequestId>F19772218238A85A</RequestId>
<HostId>GuWkjyviSiGHizehqpmsD1ndz5NClSP19DOT+s2mv7gXGQ8/X1lhbDGiIJEXpGFD</HostId>
</Error>
*/
// ErrorResponse - Is the typed error returned by all API operations.
type ErrorResponse struct {
XMLName xml.Name `xml:"Error" json:"-"`
Code string
Message string
BucketName string
Key string
RequestID string `xml:"RequestId"`
HostID string `xml:"HostId"`
// Region where the bucket is located. This header is returned
// only in HEAD bucket and ListObjects response.
Region string
// Headers of the returned S3 XML error
Headers http.Header `xml:"-" json:"-"`
}
// ToErrorResponse - Returns parsed ErrorResponse struct from body and
// http headers.
//
// For example:
//
// import s3 "github.com/minio/minio-go"
// ...
// ...
// reader, stat, err := s3.GetObject(...)
// if err != nil {
// resp := s3.ToErrorResponse(err)
// }
// ...
func ToErrorResponse(err error) ErrorResponse {
switch err := err.(type) {
case ErrorResponse:
return err
default:
return ErrorResponse{}
}
}
// Error - Returns S3 error string.
func (e ErrorResponse) Error() string {
if e.Message == "" {
msg, ok := s3ErrorResponseMap[e.Code]
if !ok {
msg = fmt.Sprintf("Error response code %s.", e.Code)
}
return msg
}
return e.Message
}
// Common string for errors to report issue location in unexpected
// cases.
const (
reportIssue = "Please report this issue at https://github.com/minio/minio-go/issues."
)
// httpRespToErrorResponse returns a new encoded ErrorResponse
// structure as error.
func httpRespToErrorResponse(resp *http.Response, bucketName, objectName string) error {
if resp == nil {
msg := "Response is empty. " + reportIssue
return ErrInvalidArgument(msg)
}
var errResp ErrorResponse
err := xmlDecoder(resp.Body, &errResp)
// Xml decoding failed with no body, fall back to HTTP headers.
if err != nil {
switch resp.StatusCode {
case http.StatusNotFound:
if objectName == "" {
errResp = ErrorResponse{
Code: "NoSuchBucket",
Message: "The specified bucket does not exist.",
BucketName: bucketName,
}
} else {
errResp = ErrorResponse{
Code: "NoSuchKey",
Message: "The specified key does not exist.",
BucketName: bucketName,
Key: objectName,
}
}
case http.StatusForbidden:
errResp = ErrorResponse{
Code: "AccessDenied",
Message: "Access Denied.",
BucketName: bucketName,
Key: objectName,
}
case http.StatusConflict:
errResp = ErrorResponse{
Code: "Conflict",
Message: "Bucket not empty.",
BucketName: bucketName,
}
case http.StatusPreconditionFailed:
errResp = ErrorResponse{
Code: "PreconditionFailed",
Message: s3ErrorResponseMap["PreconditionFailed"],
BucketName: bucketName,
Key: objectName,
}
default:
errResp = ErrorResponse{
Code: resp.Status,
Message: resp.Status,
BucketName: bucketName,
}
}
}
// Save hodID, requestID and region information
// from headers if not available through error XML.
if errResp.RequestID == "" {
errResp.RequestID = resp.Header.Get("x-amz-request-id")
}
if errResp.HostID == "" {
errResp.HostID = resp.Header.Get("x-amz-id-2")
}
if errResp.Region == "" {
errResp.Region = resp.Header.Get("x-amz-bucket-region")
}
// Save headers returned in the API XML error
errResp.Headers = resp.Header
return errResp
}
// ErrTransferAccelerationBucket - bucket name is invalid to be used with transfer acceleration.
func ErrTransferAccelerationBucket(bucketName string) error {
msg := fmt.Sprintf("The name of the bucket used for Transfer Acceleration must be DNS-compliant and must not contain periods (\".\").")
return ErrorResponse{
Code: "InvalidArgument",
Message: msg,
BucketName: bucketName,
}
}
// ErrEntityTooLarge - Input size is larger than supported maximum.
func ErrEntityTooLarge(totalSize, maxObjectSize int64, bucketName, objectName string) error {
msg := fmt.Sprintf("Your proposed upload size ‘%d’ exceeds the maximum allowed object size ‘%d’ for single PUT operation.", totalSize, maxObjectSize)
return ErrorResponse{
Code: "EntityTooLarge",
Message: msg,
BucketName: bucketName,
Key: objectName,
}
}
// ErrEntityTooSmall - Input size is smaller than supported minimum.
func ErrEntityTooSmall(totalSize int64, bucketName, objectName string) error {
msg := fmt.Sprintf("Your proposed upload size ‘%d’ is below the minimum allowed object size '0B' for single PUT operation.", totalSize)
return ErrorResponse{
Code: "EntityTooLarge",
Message: msg,
BucketName: bucketName,
Key: objectName,
}
}
// ErrUnexpectedEOF - Unexpected end of file reached.
func ErrUnexpectedEOF(totalRead, totalSize int64, bucketName, objectName string) error {
msg := fmt.Sprintf("Data read ‘%s’ is not equal to the size ‘%s’ of the input Reader.",
strconv.FormatInt(totalRead, 10), strconv.FormatInt(totalSize, 10))
return ErrorResponse{
Code: "UnexpectedEOF",
Message: msg,
BucketName: bucketName,
Key: objectName,
}
}
// ErrInvalidBucketName - Invalid bucket name response.
func ErrInvalidBucketName(message string) error {
return ErrorResponse{
Code: "InvalidBucketName",
Message: message,
RequestID: "minio",
}
}
// ErrInvalidObjectName - Invalid object name response.
func ErrInvalidObjectName(message string) error {
return ErrorResponse{
Code: "NoSuchKey",
Message: message,
RequestID: "minio",
}
}
// ErrInvalidObjectPrefix - Invalid object prefix response is
// similar to object name response.
var ErrInvalidObjectPrefix = ErrInvalidObjectName
// ErrInvalidArgument - Invalid argument response.
func ErrInvalidArgument(message string) error {
return ErrorResponse{
Code: "InvalidArgument",
Message: message,
RequestID: "minio",
}
}
// ErrNoSuchBucketPolicy - No Such Bucket Policy response
// The specified bucket does not have a bucket policy.
func ErrNoSuchBucketPolicy(message string) error {
return ErrorResponse{
Code: "NoSuchBucketPolicy",
Message: message,
RequestID: "minio",
}
}
// ErrAPINotSupported - API not supported response
// The specified API call is not supported
func ErrAPINotSupported(message string) error {
return ErrorResponse{
Code: "APINotSupported",
Message: message,
RequestID: "minio",
}
}

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vendor/github.com/minio/minio-go/api-error-response_test.go generated vendored Normal file
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/*
* Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2015 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required bZy applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package minio
import (
"bytes"
"encoding/xml"
"fmt"
"io/ioutil"
"net/http"
"reflect"
"strconv"
"testing"
)
// Tests validate the Error generator function for http response with error.
func TestHttpRespToErrorResponse(t *testing.T) {
// 'genAPIErrorResponse' generates ErrorResponse for given APIError.
// provides a encodable populated response values.
genAPIErrorResponse := func(err APIError, bucketName string) ErrorResponse {
var errResp = ErrorResponse{}
errResp.Code = err.Code
errResp.Message = err.Description
errResp.BucketName = bucketName
return errResp
}
// Encodes the response headers into XML format.
encodeErr := func(response interface{}) []byte {
var bytesBuffer bytes.Buffer
bytesBuffer.WriteString(xml.Header)
encode := xml.NewEncoder(&bytesBuffer)
encode.Encode(response)
return bytesBuffer.Bytes()
}
// `createAPIErrorResponse` Mocks XML error response from the server.
createAPIErrorResponse := func(APIErr APIError, bucketName string) *http.Response {
// generate error response.
// response body contains the XML error message.
resp := &http.Response{}
errorResponse := genAPIErrorResponse(APIErr, bucketName)
encodedErrorResponse := encodeErr(errorResponse)
// write Header.
resp.StatusCode = APIErr.HTTPStatusCode
resp.Body = ioutil.NopCloser(bytes.NewBuffer(encodedErrorResponse))
return resp
}
// 'genErrResponse' contructs error response based http Status Code
genErrResponse := func(resp *http.Response, code, message, bucketName, objectName string) ErrorResponse {
errResp := ErrorResponse{
Code: code,
Message: message,
BucketName: bucketName,
Key: objectName,
RequestID: resp.Header.Get("x-amz-request-id"),
HostID: resp.Header.Get("x-amz-id-2"),
Region: resp.Header.Get("x-amz-bucket-region"),
Headers: resp.Header,
}
return errResp
}
// Generate invalid argument error.
genInvalidError := func(message string) error {
errResp := ErrorResponse{
Code: "InvalidArgument",
Message: message,
RequestID: "minio",
}
return errResp
}
// Set common http response headers.
setCommonHeaders := func(resp *http.Response) *http.Response {
// set headers.
resp.Header = make(http.Header)
resp.Header.Set("x-amz-request-id", "xyz")
resp.Header.Set("x-amz-id-2", "abc")
resp.Header.Set("x-amz-bucket-region", "us-east-1")
return resp
}
// Generate http response with empty body.
// Set the StatusCode to the argument supplied.
// Sets common headers.
genEmptyBodyResponse := func(statusCode int) *http.Response {
resp := &http.Response{}
// set empty response body.
resp.Body = ioutil.NopCloser(bytes.NewBuffer([]byte("")))
// set headers.
setCommonHeaders(resp)
// set status code.
resp.StatusCode = statusCode
return resp
}
// Decode XML error message from the http response body.
decodeXMLError := func(resp *http.Response, t *testing.T) error {
var errResp ErrorResponse
err := xmlDecoder(resp.Body, &errResp)
if err != nil {
t.Fatal("XML decoding of response body failed")
}
return errResp
}
// List of APIErrors used to generate/mock server side XML error response.
APIErrors := []APIError{
{
Code: "NoSuchBucketPolicy",
Description: "The specified bucket does not have a bucket policy.",
HTTPStatusCode: http.StatusNotFound,
},
}
// List of expected response.
// Used for asserting the actual response.
expectedErrResponse := []error{
genInvalidError("Response is empty. " + "Please report this issue at https://github.com/minio/minio-go/issues."),
decodeXMLError(createAPIErrorResponse(APIErrors[0], "minio-bucket"), t),
genErrResponse(setCommonHeaders(&http.Response{}), "NoSuchBucket", "The specified bucket does not exist.", "minio-bucket", ""),
genErrResponse(setCommonHeaders(&http.Response{}), "NoSuchKey", "The specified key does not exist.", "minio-bucket", "Asia/"),
genErrResponse(setCommonHeaders(&http.Response{}), "AccessDenied", "Access Denied.", "minio-bucket", ""),
genErrResponse(setCommonHeaders(&http.Response{}), "Conflict", "Bucket not empty.", "minio-bucket", ""),
genErrResponse(setCommonHeaders(&http.Response{}), "Bad Request", "Bad Request", "minio-bucket", ""),
}
// List of http response to be used as input.
inputResponses := []*http.Response{
nil,
createAPIErrorResponse(APIErrors[0], "minio-bucket"),
genEmptyBodyResponse(http.StatusNotFound),
genEmptyBodyResponse(http.StatusNotFound),
genEmptyBodyResponse(http.StatusForbidden),
genEmptyBodyResponse(http.StatusConflict),
genEmptyBodyResponse(http.StatusBadRequest),
}
testCases := []struct {
bucketName string
objectName string
inputHTTPResp *http.Response
// expected results.
expectedResult error
// flag indicating whether tests should pass.
}{
{"minio-bucket", "", inputResponses[0], expectedErrResponse[0]},
{"minio-bucket", "", inputResponses[1], expectedErrResponse[1]},
{"minio-bucket", "", inputResponses[2], expectedErrResponse[2]},
{"minio-bucket", "Asia/", inputResponses[3], expectedErrResponse[3]},
{"minio-bucket", "", inputResponses[4], expectedErrResponse[4]},
{"minio-bucket", "", inputResponses[5], expectedErrResponse[5]},
}
for i, testCase := range testCases {
actualResult := httpRespToErrorResponse(testCase.inputHTTPResp, testCase.bucketName, testCase.objectName)
if !reflect.DeepEqual(testCase.expectedResult, actualResult) {
t.Errorf("Test %d: Expected result to be '%#v', but instead got '%#v'", i+1, testCase.expectedResult, actualResult)
}
}
}
// Test validates 'ErrEntityTooLarge' error response.
func TestErrEntityTooLarge(t *testing.T) {
msg := fmt.Sprintf("Your proposed upload size ‘%d’ exceeds the maximum allowed object size ‘%d’ for single PUT operation.", 1000000, 99999)
expectedResult := ErrorResponse{
Code: "EntityTooLarge",
Message: msg,
BucketName: "minio-bucket",
Key: "Asia/",
}
actualResult := ErrEntityTooLarge(1000000, 99999, "minio-bucket", "Asia/")
if !reflect.DeepEqual(expectedResult, actualResult) {
t.Errorf("Expected result to be '%+v', but instead got '%+v'", expectedResult, actualResult)
}
}
// Test validates 'ErrEntityTooSmall' error response.
func TestErrEntityTooSmall(t *testing.T) {
msg := fmt.Sprintf("Your proposed upload size ‘%d’ is below the minimum allowed object size '0B' for single PUT operation.", -1)
expectedResult := ErrorResponse{
Code: "EntityTooLarge",
Message: msg,
BucketName: "minio-bucket",
Key: "Asia/",
}
actualResult := ErrEntityTooSmall(-1, "minio-bucket", "Asia/")
if !reflect.DeepEqual(expectedResult, actualResult) {
t.Errorf("Expected result to be '%+v', but instead got '%+v'", expectedResult, actualResult)
}
}
// Test validates 'ErrUnexpectedEOF' error response.
func TestErrUnexpectedEOF(t *testing.T) {
msg := fmt.Sprintf("Data read ‘%s’ is not equal to the size ‘%s’ of the input Reader.",
strconv.FormatInt(100, 10), strconv.FormatInt(101, 10))
expectedResult := ErrorResponse{
Code: "UnexpectedEOF",
Message: msg,
BucketName: "minio-bucket",
Key: "Asia/",
}
actualResult := ErrUnexpectedEOF(100, 101, "minio-bucket", "Asia/")
if !reflect.DeepEqual(expectedResult, actualResult) {
t.Errorf("Expected result to be '%+v', but instead got '%+v'", expectedResult, actualResult)
}
}
// Test validates 'ErrInvalidBucketName' error response.
func TestErrInvalidBucketName(t *testing.T) {
expectedResult := ErrorResponse{
Code: "InvalidBucketName",
Message: "Invalid Bucket name",
RequestID: "minio",
}
actualResult := ErrInvalidBucketName("Invalid Bucket name")
if !reflect.DeepEqual(expectedResult, actualResult) {
t.Errorf("Expected result to be '%+v', but instead got '%+v'", expectedResult, actualResult)
}
}
// Test validates 'ErrInvalidObjectName' error response.
func TestErrInvalidObjectName(t *testing.T) {
expectedResult := ErrorResponse{
Code: "NoSuchKey",
Message: "Invalid Object Key",
RequestID: "minio",
}
actualResult := ErrInvalidObjectName("Invalid Object Key")
if !reflect.DeepEqual(expectedResult, actualResult) {
t.Errorf("Expected result to be '%+v', but instead got '%+v'", expectedResult, actualResult)
}
}
// Test validates 'ErrInvalidArgument' response.
func TestErrInvalidArgument(t *testing.T) {
expectedResult := ErrorResponse{
Code: "InvalidArgument",
Message: "Invalid Argument",
RequestID: "minio",
}
actualResult := ErrInvalidArgument("Invalid Argument")
if !reflect.DeepEqual(expectedResult, actualResult) {
t.Errorf("Expected result to be '%+v', but instead got '%+v'", expectedResult, actualResult)
}
}
// Tests if the Message field is missing.
func TestErrWithoutMessage(t *testing.T) {
errResp := ErrorResponse{
Code: "AccessDenied",
RequestID: "minio",
}
if errResp.Error() != "Access Denied." {
t.Errorf("Expected \"Access Denied.\", got %s", errResp)
}
errResp = ErrorResponse{
Code: "InvalidArgument",
RequestID: "minio",
}
if errResp.Error() != "Error response code InvalidArgument." {
t.Errorf("Expected \"Error response code InvalidArgument.\", got %s", errResp)
}
}

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vendor/github.com/minio/minio-go/api-get-object-file.go generated vendored Normal file
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/*
* Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2015 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package minio
import (
"io"
"os"
"path/filepath"
)
// FGetObject - download contents of an object to a local file.
func (c Client) FGetObject(bucketName, objectName, filePath string) error {
// Input validation.
if err := isValidBucketName(bucketName); err != nil {
return err
}
if err := isValidObjectName(objectName); err != nil {
return err
}
// Verify if destination already exists.
st, err := os.Stat(filePath)
if err == nil {
// If the destination exists and is a directory.
if st.IsDir() {
return ErrInvalidArgument("fileName is a directory.")
}
}
// Proceed if file does not exist. return for all other errors.
if err != nil {
if !os.IsNotExist(err) {
return err
}
}
// Extract top level directory.
objectDir, _ := filepath.Split(filePath)
if objectDir != "" {
// Create any missing top level directories.
if err := os.MkdirAll(objectDir, 0700); err != nil {
return err
}
}
// Gather md5sum.
objectStat, err := c.StatObject(bucketName, objectName)
if err != nil {
return err
}
// Write to a temporary file "fileName.part.minio" before saving.
filePartPath := filePath + objectStat.ETag + ".part.minio"
// If exists, open in append mode. If not create it as a part file.
filePart, err := os.OpenFile(filePartPath, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0600)
if err != nil {
return err
}
// Issue Stat to get the current offset.
st, err = filePart.Stat()
if err != nil {
return err
}
// Initialize get object request headers to set the
// appropriate range offsets to read from.
reqHeaders := NewGetReqHeaders()
if st.Size() > 0 {
reqHeaders.SetRange(st.Size(), 0)
}
// Seek to current position for incoming reader.
objectReader, objectStat, err := c.getObject(bucketName, objectName, reqHeaders)
if err != nil {
return err
}
// Write to the part file.
if _, err = io.CopyN(filePart, objectReader, objectStat.Size); err != nil {
return err
}
// Close the file before rename, this is specifically needed for Windows users.
if err = filePart.Close(); err != nil {
return err
}
// Safely completed. Now commit by renaming to actual filename.
if err = os.Rename(filePartPath, filePath); err != nil {
return err
}
// Return.
return nil
}

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