s3manager-web/vendor/github.com/minio/minio-go/api-put-bucket.go

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/*
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* Minio Go Library for Amazon S3 Compatible Cloud Storage
* (C) 2015, 2016, 2017 Minio, Inc.
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*
* 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"
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"github.com/minio/minio-go/pkg/credentials"
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"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)
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if resp.StatusCode == http.StatusBadRequest && errResp.Region != "" {
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// 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)
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// Get credentials from the configured credentials provider.
value, err := c.credsProvider.Get()
if err != nil {
return nil, err
}
var (
signerType = value.SignerType
accessKeyID = value.AccessKeyID
secretAccessKey = value.SecretAccessKey
sessionToken = value.SessionToken
)
// Custom signer set then override the behavior.
if c.overrideSignerType != credentials.SignatureDefault {
signerType = c.overrideSignerType
}
// If signerType returned by credentials helper is anonymous,
// then do not sign regardless of signerType override.
if value.SignerType == credentials.SignatureAnonymous {
signerType = credentials.SignatureAnonymous
}
// set sha256 sum for signature calculation only with signature version '4'.
if signerType.IsV4() {
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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)))
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if signerType.IsV4() {
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// Set sha256.
req.Header.Set("X-Amz-Content-Sha256", hex.EncodeToString(sum256(createBucketConfigBytes)))
}
}
// Sign the request.
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if signerType.IsV4() {
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// Signature calculated for MakeBucket request should be for 'us-east-1',
// regardless of the bucket's location constraint.
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req = s3signer.SignV4(*req, accessKeyID, secretAccessKey, sessionToken, "us-east-1")
} else if signerType.IsV2() {
req = s3signer.SignV2(*req, accessKeyID, secretAccessKey)
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}
// 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{})
}