331 lines
9.7 KiB
Go
331 lines
9.7 KiB
Go
|
/*
|
||
|
|
* Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2015, 2016 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 (
|
||
|
|
"bytes"
|
||
|
|
"encoding/base64"
|
||
|
|
"encoding/hex"
|
||
|
|
"encoding/json"
|
||
|
|
"encoding/xml"
|
||
|
|
"fmt"
|
||
|
|
"io/ioutil"
|
||
|
|
"net/http"
|
||
|
|
"net/url"
|
||
|
|
"path"
|
||
|
|
|
||
|
|
"github.com/minio/minio-go/pkg/policy"
|
||
|
|
"github.com/minio/minio-go/pkg/s3signer"
|
||
|
|
)
|
||
|
|
|
||
|
|
/// Bucket operations
|
||
|
|
|
||
|
|
// MakeBucket creates a new bucket with bucketName.
|
||
|
|
//
|
||
|
|
// Location is an optional argument, by default all buckets are
|
||
|
|
// created in US Standard Region.
|
||
|
|
//
|
||
|
|
// For Amazon S3 for more supported regions - http://docs.aws.amazon.com/general/latest/gr/rande.html
|
||
|
|
// For Google Cloud Storage for more supported regions - https://cloud.google.com/storage/docs/bucket-locations
|
||
|
|
func (c Client) MakeBucket(bucketName string, location string) (err error) {
|
||
|
|
defer func() {
|
||
|
|
// Save the location into cache on a successful makeBucket response.
|
||
|
|
if err == nil {
|
||
|
|
c.bucketLocCache.Set(bucketName, location)
|
||
|
|
}
|
||
|
|
}()
|
||
|
|
|
||
|
|
// Validate the input arguments.
|
||
|
|
if err := isValidBucketName(bucketName); err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
// If location is empty, treat is a default region 'us-east-1'.
|
||
|
|
if location == "" {
|
||
|
|
location = "us-east-1"
|
||
|
|
}
|
||
|
|
|
||
|
|
// Try creating bucket with the provided region, in case of
|
||
|
|
// invalid region error let's guess the appropriate region
|
||
|
|
// from S3 API headers
|
||
|
|
|
||
|
|
// Create a done channel to control 'newRetryTimer' go routine.
|
||
|
|
doneCh := make(chan struct{}, 1)
|
||
|
|
|
||
|
|
// Indicate to our routine to exit cleanly upon return.
|
||
|
|
defer close(doneCh)
|
||
|
|
|
||
|
|
// Blank indentifier is kept here on purpose since 'range' without
|
||
|
|
// blank identifiers is only supported since go1.4
|
||
|
|
// https://golang.org/doc/go1.4#forrange.
|
||
|
|
for _ = range c.newRetryTimer(MaxRetry, DefaultRetryUnit, DefaultRetryCap, MaxJitter, doneCh) {
|
||
|
|
// Initialize the makeBucket request.
|
||
|
|
req, err := c.makeBucketRequest(bucketName, location)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
// Execute make bucket request.
|
||
|
|
resp, err := c.do(req)
|
||
|
|
defer closeResponse(resp)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
if resp.StatusCode != http.StatusOK {
|
||
|
|
err := httpRespToErrorResponse(resp, bucketName, "")
|
||
|
|
errResp := ToErrorResponse(err)
|
||
|
|
if errResp.Code == "InvalidRegion" && errResp.Region != "" {
|
||
|
|
// Fetch bucket region found in headers
|
||
|
|
// of S3 error response, attempt bucket
|
||
|
|
// create again.
|
||
|
|
location = errResp.Region
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
// Nothing to retry, fail.
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
// Control reaches here when bucket create was successful,
|
||
|
|
// break out.
|
||
|
|
break
|
||
|
|
}
|
||
|
|
|
||
|
|
// Success.
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// Low level wrapper API For makeBucketRequest.
|
||
|
|
func (c Client) makeBucketRequest(bucketName string, location string) (*http.Request, error) {
|
||
|
|
// Validate input arguments.
|
||
|
|
if err := isValidBucketName(bucketName); err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
|
||
|
|
// In case of Amazon S3. The make bucket issued on
|
||
|
|
// already existing bucket would fail with
|
||
|
|
// 'AuthorizationMalformed' error if virtual style is
|
||
|
|
// used. So we default to 'path style' as that is the
|
||
|
|
// preferred method here. The final location of the
|
||
|
|
// 'bucket' is provided through XML LocationConstraint
|
||
|
|
// data with the request.
|
||
|
|
targetURL := c.endpointURL
|
||
|
|
targetURL.Path = path.Join(bucketName, "") + "/"
|
||
|
|
|
||
|
|
// get a new HTTP request for the method.
|
||
|
|
req, err := http.NewRequest("PUT", targetURL.String(), nil)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
|
||
|
|
// set UserAgent for the request.
|
||
|
|
c.setUserAgent(req)
|
||
|
|
|
||
|
|
// set sha256 sum for signature calculation only with
|
||
|
|
// signature version '4'.
|
||
|
|
if c.signature.isV4() {
|
||
|
|
req.Header.Set("X-Amz-Content-Sha256", hex.EncodeToString(sum256([]byte{})))
|
||
|
|
}
|
||
|
|
|
||
|
|
// If location is not 'us-east-1' create bucket location config.
|
||
|
|
if location != "us-east-1" && location != "" {
|
||
|
|
createBucketConfig := createBucketConfiguration{}
|
||
|
|
createBucketConfig.Location = location
|
||
|
|
var createBucketConfigBytes []byte
|
||
|
|
createBucketConfigBytes, err = xml.Marshal(createBucketConfig)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
createBucketConfigBuffer := bytes.NewBuffer(createBucketConfigBytes)
|
||
|
|
req.Body = ioutil.NopCloser(createBucketConfigBuffer)
|
||
|
|
req.ContentLength = int64(len(createBucketConfigBytes))
|
||
|
|
// Set content-md5.
|
||
|
|
req.Header.Set("Content-Md5", base64.StdEncoding.EncodeToString(sumMD5(createBucketConfigBytes)))
|
||
|
|
if c.signature.isV4() {
|
||
|
|
// Set sha256.
|
||
|
|
req.Header.Set("X-Amz-Content-Sha256", hex.EncodeToString(sum256(createBucketConfigBytes)))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Sign the request.
|
||
|
|
if c.signature.isV4() {
|
||
|
|
// Signature calculated for MakeBucket request should be for 'us-east-1',
|
||
|
|
// regardless of the bucket's location constraint.
|
||
|
|
req = s3signer.SignV4(*req, c.accessKeyID, c.secretAccessKey, "us-east-1")
|
||
|
|
} else if c.signature.isV2() {
|
||
|
|
req = s3signer.SignV2(*req, c.accessKeyID, c.secretAccessKey)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return signed request.
|
||
|
|
return req, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// SetBucketPolicy set the access permissions on an existing bucket.
|
||
|
|
//
|
||
|
|
// For example
|
||
|
|
//
|
||
|
|
// none - owner gets full access [default].
|
||
|
|
// readonly - anonymous get access for everyone at a given object prefix.
|
||
|
|
// readwrite - anonymous list/put/delete access to a given object prefix.
|
||
|
|
// writeonly - anonymous put/delete access to a given object prefix.
|
||
|
|
func (c Client) SetBucketPolicy(bucketName string, objectPrefix string, bucketPolicy policy.BucketPolicy) error {
|
||
|
|
// Input validation.
|
||
|
|
if err := isValidBucketName(bucketName); err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
if err := isValidObjectPrefix(objectPrefix); err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
if !bucketPolicy.IsValidBucketPolicy() {
|
||
|
|
return ErrInvalidArgument(fmt.Sprintf("Invalid bucket policy provided. %s", bucketPolicy))
|
||
|
|
}
|
||
|
|
|
||
|
|
policyInfo, err := c.getBucketPolicy(bucketName)
|
||
|
|
errResponse := ToErrorResponse(err)
|
||
|
|
if err != nil && errResponse.Code != "NoSuchBucketPolicy" {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
if bucketPolicy == policy.BucketPolicyNone && policyInfo.Statements == nil {
|
||
|
|
// As the request is for removing policy and the bucket
|
||
|
|
// has empty policy statements, just return success.
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
policyInfo.Statements = policy.SetPolicy(policyInfo.Statements, bucketPolicy, bucketName, objectPrefix)
|
||
|
|
|
||
|
|
// Save the updated policies.
|
||
|
|
return c.putBucketPolicy(bucketName, policyInfo)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Saves a new bucket policy.
|
||
|
|
func (c Client) putBucketPolicy(bucketName string, policyInfo policy.BucketAccessPolicy) error {
|
||
|
|
// Input validation.
|
||
|
|
if err := isValidBucketName(bucketName); err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
// If there are no policy statements, we should remove entire policy.
|
||
|
|
if len(policyInfo.Statements) == 0 {
|
||
|
|
return c.removeBucketPolicy(bucketName)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Get resources properly escaped and lined up before
|
||
|
|
// using them in http request.
|
||
|
|
urlValues := make(url.Values)
|
||
|
|
urlValues.Set("policy", "")
|
||
|
|
|
||
|
|
policyBytes, err := json.Marshal(&policyInfo)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
policyBuffer := bytes.NewReader(policyBytes)
|
||
|
|
reqMetadata := requestMetadata{
|
||
|
|
bucketName: bucketName,
|
||
|
|
queryValues: urlValues,
|
||
|
|
contentBody: policyBuffer,
|
||
|
|
contentLength: int64(len(policyBytes)),
|
||
|
|
contentMD5Bytes: sumMD5(policyBytes),
|
||
|
|
contentSHA256Bytes: sum256(policyBytes),
|
||
|
|
}
|
||
|
|
|
||
|
|
// Execute PUT to upload a new bucket policy.
|
||
|
|
resp, err := c.executeMethod("PUT", reqMetadata)
|
||
|
|
defer closeResponse(resp)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
if resp != nil {
|
||
|
|
if resp.StatusCode != http.StatusNoContent {
|
||
|
|
return httpRespToErrorResponse(resp, bucketName, "")
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// Removes all policies on a bucket.
|
||
|
|
func (c Client) removeBucketPolicy(bucketName string) error {
|
||
|
|
// Input validation.
|
||
|
|
if err := isValidBucketName(bucketName); err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
// Get resources properly escaped and lined up before
|
||
|
|
// using them in http request.
|
||
|
|
urlValues := make(url.Values)
|
||
|
|
urlValues.Set("policy", "")
|
||
|
|
|
||
|
|
// Execute DELETE on objectName.
|
||
|
|
resp, err := c.executeMethod("DELETE", requestMetadata{
|
||
|
|
bucketName: bucketName,
|
||
|
|
queryValues: urlValues,
|
||
|
|
contentSHA256Bytes: emptySHA256,
|
||
|
|
})
|
||
|
|
defer closeResponse(resp)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// SetBucketNotification saves a new bucket notification.
|
||
|
|
func (c Client) SetBucketNotification(bucketName string, bucketNotification BucketNotification) error {
|
||
|
|
// Input validation.
|
||
|
|
if err := isValidBucketName(bucketName); err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
// Get resources properly escaped and lined up before
|
||
|
|
// using them in http request.
|
||
|
|
urlValues := make(url.Values)
|
||
|
|
urlValues.Set("notification", "")
|
||
|
|
|
||
|
|
notifBytes, err := xml.Marshal(bucketNotification)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
notifBuffer := bytes.NewReader(notifBytes)
|
||
|
|
reqMetadata := requestMetadata{
|
||
|
|
bucketName: bucketName,
|
||
|
|
queryValues: urlValues,
|
||
|
|
contentBody: notifBuffer,
|
||
|
|
contentLength: int64(len(notifBytes)),
|
||
|
|
contentMD5Bytes: sumMD5(notifBytes),
|
||
|
|
contentSHA256Bytes: sum256(notifBytes),
|
||
|
|
}
|
||
|
|
|
||
|
|
// Execute PUT to upload a new bucket notification.
|
||
|
|
resp, err := c.executeMethod("PUT", reqMetadata)
|
||
|
|
defer closeResponse(resp)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
if resp != nil {
|
||
|
|
if resp.StatusCode != http.StatusOK {
|
||
|
|
return httpRespToErrorResponse(resp, bucketName, "")
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// RemoveAllBucketNotification - Remove bucket notification clears all previously specified config
|
||
|
|
func (c Client) RemoveAllBucketNotification(bucketName string) error {
|
||
|
|
return c.SetBucketNotification(bucketName, BucketNotification{})
|
||
|
|
}
|