mirror of
https://github.com/minio/minio.git
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9dca46e156
Signature calculation has now moved out from being a package to top-level as a layered mechanism. In case of payload calculation with body, go-routines are initiated to simultaneously write and calculate shasum. Errors are sent over the writer so that the lower layer removes the temporary files properly.
595 lines
18 KiB
Go
595 lines
18 KiB
Go
/*
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* Minio Cloud Storage, (C) 2015, 2016 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package main
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import (
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"bytes"
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"encoding/xml"
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"io"
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"io/ioutil"
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"mime/multipart"
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"net/http"
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"net/url"
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"strings"
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mux "github.com/gorilla/mux"
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"github.com/minio/minio/pkg/fs"
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"github.com/minio/minio/pkg/probe"
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)
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// http://docs.aws.amazon.com/AmazonS3/latest/dev/mpuAndPermissions.html
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func enforceBucketPolicy(action string, bucket string, reqURL *url.URL) (s3Error APIErrorCode) {
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// Read saved bucket policy.
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policy, err := readBucketPolicy(bucket)
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if err != nil {
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errorIf(err.Trace(bucket), "GetBucketPolicy failed.", nil)
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switch err.ToGoError().(type) {
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case fs.BucketNotFound:
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return ErrNoSuchBucket
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case fs.BucketNameInvalid:
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return ErrInvalidBucketName
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default:
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// For any other error just return AccessDenied.
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return ErrAccessDenied
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}
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}
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// Parse the saved policy.
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bucketPolicy, e := parseBucketPolicy(policy)
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if e != nil {
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errorIf(probe.NewError(e), "Parse policy failed.", nil)
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return ErrAccessDenied
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}
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// Construct resource in 'arn:aws:s3:::examplebucket' format.
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resource := AWSResourcePrefix + strings.TrimPrefix(reqURL.Path, "/")
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// Get conditions for policy verification.
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conditions := make(map[string]string)
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for queryParam := range reqURL.Query() {
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conditions[queryParam] = reqURL.Query().Get("queryParam")
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}
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// Validate action, resource and conditions with current policy statements.
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if !bucketPolicyEvalStatements(action, resource, conditions, bucketPolicy.Statements) {
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return ErrAccessDenied
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}
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return ErrNone
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}
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// GetBucketLocationHandler - GET Bucket location.
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// -------------------------
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// This operation returns bucket location.
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func (api storageAPI) GetBucketLocationHandler(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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bucket := vars["bucket"]
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switch getRequestAuthType(r) {
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default:
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// For all unknown auth types return error.
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writeErrorResponse(w, r, ErrAccessDenied, r.URL.Path)
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return
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case authTypeAnonymous:
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// http://docs.aws.amazon.com/AmazonS3/latest/dev/mpuAndPermissions.html
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if s3Error := enforceBucketPolicy("s3:GetBucketLocation", bucket, r.URL); s3Error != ErrNone {
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writeErrorResponse(w, r, s3Error, r.URL.Path)
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return
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}
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case authTypeSigned, authTypePresigned:
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if s3Error := isReqAuthenticated(r); s3Error != ErrNone {
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writeErrorResponse(w, r, s3Error, r.URL.Path)
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return
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}
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}
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_, err := api.Filesystem.GetBucketInfo(bucket)
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if err != nil {
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errorIf(err.Trace(), "GetBucketInfo failed.", nil)
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switch err.ToGoError().(type) {
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case fs.BucketNotFound:
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writeErrorResponse(w, r, ErrNoSuchBucket, r.URL.Path)
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case fs.BucketNameInvalid:
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writeErrorResponse(w, r, ErrInvalidBucketName, r.URL.Path)
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default:
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writeErrorResponse(w, r, ErrInternalError, r.URL.Path)
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}
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return
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}
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// Generate response.
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encodedSuccessResponse := encodeResponse(LocationResponse{})
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// Get current region.
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region := serverConfig.GetRegion()
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if region != "us-east-1" {
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encodedSuccessResponse = encodeResponse(LocationResponse{
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Location: region,
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})
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}
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setCommonHeaders(w) // write headers.
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writeSuccessResponse(w, encodedSuccessResponse)
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}
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// ListMultipartUploadsHandler - GET Bucket (List Multipart uploads)
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// -------------------------
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// This operation lists in-progress multipart uploads. An in-progress
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// multipart upload is a multipart upload that has been initiated,
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// using the Initiate Multipart Upload request, but has not yet been
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// completed or aborted. This operation returns at most 1,000 multipart
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// uploads in the response.
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//
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func (api storageAPI) ListMultipartUploadsHandler(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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bucket := vars["bucket"]
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switch getRequestAuthType(r) {
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default:
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// For all unknown auth types return error.
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writeErrorResponse(w, r, ErrAccessDenied, r.URL.Path)
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return
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case authTypeAnonymous:
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// http://docs.aws.amazon.com/AmazonS3/latest/dev/mpuAndPermissions.html
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if s3Error := enforceBucketPolicy("s3:ListBucketMultipartUploads", bucket, r.URL); s3Error != ErrNone {
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writeErrorResponse(w, r, s3Error, r.URL.Path)
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return
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}
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case authTypePresigned, authTypeSigned:
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if s3Error := isReqAuthenticated(r); s3Error != ErrNone {
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writeErrorResponse(w, r, s3Error, r.URL.Path)
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return
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}
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}
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resources := getBucketMultipartResources(r.URL.Query())
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if resources.MaxUploads < 0 {
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writeErrorResponse(w, r, ErrInvalidMaxUploads, r.URL.Path)
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return
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}
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if resources.MaxUploads == 0 {
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resources.MaxUploads = maxObjectList
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}
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resources, err := api.Filesystem.ListMultipartUploads(bucket, resources)
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if err != nil {
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errorIf(err.Trace(), "ListMultipartUploads failed.", nil)
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switch err.ToGoError().(type) {
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case fs.BucketNotFound:
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writeErrorResponse(w, r, ErrNoSuchBucket, r.URL.Path)
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default:
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writeErrorResponse(w, r, ErrInternalError, r.URL.Path)
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}
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return
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}
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// generate response
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response := generateListMultipartUploadsResponse(bucket, resources)
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encodedSuccessResponse := encodeResponse(response)
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// write headers.
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setCommonHeaders(w)
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// write success response.
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writeSuccessResponse(w, encodedSuccessResponse)
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}
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// ListObjectsHandler - GET Bucket (List Objects)
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// -- -----------------------
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// This implementation of the GET operation returns some or all (up to 1000)
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// of the objects in a bucket. You can use the request parameters as selection
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// criteria to return a subset of the objects in a bucket.
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//
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func (api storageAPI) ListObjectsHandler(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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bucket := vars["bucket"]
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switch getRequestAuthType(r) {
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default:
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// For all unknown auth types return error.
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writeErrorResponse(w, r, ErrAccessDenied, r.URL.Path)
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return
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case authTypeAnonymous:
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// http://docs.aws.amazon.com/AmazonS3/latest/dev/mpuAndPermissions.html
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if s3Error := enforceBucketPolicy("s3:ListBucket", bucket, r.URL); s3Error != ErrNone {
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writeErrorResponse(w, r, s3Error, r.URL.Path)
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return
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}
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case authTypeSigned, authTypePresigned:
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if s3Error := isReqAuthenticated(r); s3Error != ErrNone {
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writeErrorResponse(w, r, s3Error, r.URL.Path)
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return
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}
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}
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// TODO handle encoding type.
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prefix, marker, delimiter, maxkeys, _ := getBucketResources(r.URL.Query())
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if maxkeys < 0 {
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writeErrorResponse(w, r, ErrInvalidMaxKeys, r.URL.Path)
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return
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}
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if maxkeys == 0 {
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maxkeys = maxObjectList
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}
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listResp, err := api.Filesystem.ListObjects(bucket, prefix, marker, delimiter, maxkeys)
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if err == nil {
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// generate response
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response := generateListObjectsResponse(bucket, prefix, marker, delimiter, maxkeys, listResp)
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encodedSuccessResponse := encodeResponse(response)
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// Write headers
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setCommonHeaders(w)
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// Write success response.
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writeSuccessResponse(w, encodedSuccessResponse)
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return
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}
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switch err.ToGoError().(type) {
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case fs.BucketNameInvalid:
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writeErrorResponse(w, r, ErrInvalidBucketName, r.URL.Path)
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case fs.BucketNotFound:
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writeErrorResponse(w, r, ErrNoSuchBucket, r.URL.Path)
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case fs.ObjectNotFound:
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writeErrorResponse(w, r, ErrNoSuchKey, r.URL.Path)
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case fs.ObjectNameInvalid:
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writeErrorResponse(w, r, ErrNoSuchKey, r.URL.Path)
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default:
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errorIf(err.Trace(), "ListObjects failed.", nil)
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writeErrorResponse(w, r, ErrInternalError, r.URL.Path)
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}
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}
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// ListBucketsHandler - GET Service
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// -----------
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// This implementation of the GET operation returns a list of all buckets
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// owned by the authenticated sender of the request.
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func (api storageAPI) ListBucketsHandler(w http.ResponseWriter, r *http.Request) {
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// List buckets does not support bucket policies.
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switch getRequestAuthType(r) {
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default:
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// For all unknown auth types return error.
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writeErrorResponse(w, r, ErrAccessDenied, r.URL.Path)
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return
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case authTypeSigned, authTypePresigned:
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if s3Error := isReqAuthenticated(r); s3Error != ErrNone {
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writeErrorResponse(w, r, s3Error, r.URL.Path)
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return
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}
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}
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buckets, err := api.Filesystem.ListBuckets()
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if err == nil {
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// generate response
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response := generateListBucketsResponse(buckets)
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encodedSuccessResponse := encodeResponse(response)
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// write headers
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setCommonHeaders(w)
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// write response
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writeSuccessResponse(w, encodedSuccessResponse)
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return
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}
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errorIf(err.Trace(), "ListBuckets failed.", nil)
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writeErrorResponse(w, r, ErrInternalError, r.URL.Path)
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}
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// DeleteMultipleObjectsHandler - deletes multiple objects.
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func (api storageAPI) DeleteMultipleObjectsHandler(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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bucket := vars["bucket"]
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switch getRequestAuthType(r) {
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default:
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// For all unknown auth types return error.
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writeErrorResponse(w, r, ErrAccessDenied, r.URL.Path)
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return
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case authTypeAnonymous:
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// http://docs.aws.amazon.com/AmazonS3/latest/dev/mpuAndPermissions.html
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if s3Error := enforceBucketPolicy("s3:DeleteObject", bucket, r.URL); s3Error != ErrNone {
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writeErrorResponse(w, r, s3Error, r.URL.Path)
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return
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}
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case authTypePresigned, authTypeSigned:
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if s3Error := isReqAuthenticated(r); s3Error != ErrNone {
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writeErrorResponse(w, r, s3Error, r.URL.Path)
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return
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}
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}
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// Content-Length is required and should be non-zero
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// http://docs.aws.amazon.com/AmazonS3/latest/API/multiobjectdeleteapi.html
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if r.ContentLength <= 0 {
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writeErrorResponse(w, r, ErrMissingContentLength, r.URL.Path)
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return
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}
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// Content-Md5 is requied should be set
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// http://docs.aws.amazon.com/AmazonS3/latest/API/multiobjectdeleteapi.html
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if _, ok := r.Header["Content-Md5"]; !ok {
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writeErrorResponse(w, r, ErrMissingContentMD5, r.URL.Path)
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return
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}
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// Allocate incoming content length bytes.
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deleteXMLBytes := make([]byte, r.ContentLength)
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// Read incoming body XML bytes.
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_, e := io.ReadFull(r.Body, deleteXMLBytes)
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if e != nil {
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errorIf(probe.NewError(e), "DeleteMultipleObjects failed.", nil)
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writeErrorResponse(w, r, ErrInternalError, r.URL.Path)
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return
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}
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// Unmarshal list of keys to be deleted.
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deleteObjects := &DeleteObjectsRequest{}
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if e := xml.Unmarshal(deleteXMLBytes, deleteObjects); e != nil {
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writeErrorResponse(w, r, ErrMalformedXML, r.URL.Path)
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return
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}
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var deleteErrors []DeleteError
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var deletedObjects []ObjectIdentifier
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// Loop through all the objects and delete them sequentially.
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for _, object := range deleteObjects.Objects {
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err := api.Filesystem.DeleteObject(bucket, object.ObjectName)
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if err == nil {
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deletedObjects = append(deletedObjects, ObjectIdentifier{
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ObjectName: object.ObjectName,
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})
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} else {
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errorIf(err.Trace(object.ObjectName), "DeleteObject failed.", nil)
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switch err.ToGoError().(type) {
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case fs.BucketNameInvalid:
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deleteErrors = append(deleteErrors, DeleteError{
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Code: errorCodeResponse[ErrInvalidBucketName].Code,
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Message: errorCodeResponse[ErrInvalidBucketName].Description,
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Key: object.ObjectName,
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})
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case fs.BucketNotFound:
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deleteErrors = append(deleteErrors, DeleteError{
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Code: errorCodeResponse[ErrNoSuchBucket].Code,
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Message: errorCodeResponse[ErrNoSuchBucket].Description,
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Key: object.ObjectName,
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})
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case fs.ObjectNotFound:
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deleteErrors = append(deleteErrors, DeleteError{
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Code: errorCodeResponse[ErrNoSuchKey].Code,
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Message: errorCodeResponse[ErrNoSuchKey].Description,
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Key: object.ObjectName,
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})
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case fs.ObjectNameInvalid:
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deleteErrors = append(deleteErrors, DeleteError{
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Code: errorCodeResponse[ErrNoSuchKey].Code,
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Message: errorCodeResponse[ErrNoSuchKey].Description,
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Key: object.ObjectName,
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})
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default:
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deleteErrors = append(deleteErrors, DeleteError{
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Code: errorCodeResponse[ErrInternalError].Code,
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Message: errorCodeResponse[ErrInternalError].Description,
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Key: object.ObjectName,
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})
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}
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}
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}
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// Generate response
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response := generateMultiDeleteResponse(deleteObjects.Quiet, deletedObjects, deleteErrors)
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encodedSuccessResponse := encodeResponse(response)
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// Write headers
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setCommonHeaders(w)
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// Write success response.
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writeSuccessResponse(w, encodedSuccessResponse)
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}
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// PutBucketHandler - PUT Bucket
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// ----------
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// This implementation of the PUT operation creates a new bucket for authenticated request
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func (api storageAPI) PutBucketHandler(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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bucket := vars["bucket"]
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// Set http request for signature.
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switch getRequestAuthType(r) {
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default:
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// For all unknown auth types return error.
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writeErrorResponse(w, r, ErrAccessDenied, r.URL.Path)
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return
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case authTypePresigned, authTypeSigned:
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if s3Error := isReqAuthenticated(r); s3Error != ErrNone {
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writeErrorResponse(w, r, s3Error, r.URL.Path)
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return
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}
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}
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// Make bucket.
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err := api.Filesystem.MakeBucket(bucket)
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if err != nil {
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errorIf(err.Trace(), "MakeBucket failed.", nil)
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switch err.ToGoError().(type) {
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case fs.BucketNameInvalid:
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writeErrorResponse(w, r, ErrInvalidBucketName, r.URL.Path)
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case fs.BucketExists:
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writeErrorResponse(w, r, ErrBucketAlreadyExists, r.URL.Path)
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default:
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writeErrorResponse(w, r, ErrInternalError, r.URL.Path)
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}
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return
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}
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// Make sure to add Location information here only for bucket
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w.Header().Set("Location", getLocation(r))
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writeSuccessResponse(w, nil)
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}
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func extractHTTPFormValues(reader *multipart.Reader) (io.Reader, map[string]string, *probe.Error) {
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/// HTML Form values
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formValues := make(map[string]string)
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filePart := new(bytes.Buffer)
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var e error
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for e == nil {
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var part *multipart.Part
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part, e = reader.NextPart()
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if part != nil {
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if part.FileName() == "" {
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buffer, e := ioutil.ReadAll(part)
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if e != nil {
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return nil, nil, probe.NewError(e)
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}
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formValues[http.CanonicalHeaderKey(part.FormName())] = string(buffer)
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} else {
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if _, e := io.Copy(filePart, part); e != nil {
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return nil, nil, probe.NewError(e)
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}
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}
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}
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}
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return filePart, formValues, nil
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}
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// PostPolicyBucketHandler - POST policy
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// ----------
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// This implementation of the POST operation handles object creation with a specified
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// signature policy in multipart/form-data
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func (api storageAPI) PostPolicyBucketHandler(w http.ResponseWriter, r *http.Request) {
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// Here the parameter is the size of the form data that should
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// be loaded in memory, the remaining being put in temporary files.
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reader, e := r.MultipartReader()
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if e != nil {
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errorIf(probe.NewError(e), "Unable to initialize multipart reader.", nil)
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writeErrorResponse(w, r, ErrMalformedPOSTRequest, r.URL.Path)
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return
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}
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fileBody, formValues, err := extractHTTPFormValues(reader)
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if err != nil {
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errorIf(err.Trace(), "Unable to parse form values.", nil)
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writeErrorResponse(w, r, ErrMalformedPOSTRequest, r.URL.Path)
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return
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}
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bucket := mux.Vars(r)["bucket"]
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formValues["Bucket"] = bucket
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object := formValues["Key"]
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var ok bool
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// Verify policy signature.
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ok, err = doesPolicySignatureMatch(formValues)
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if err != nil {
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errorIf(err.Trace(), "Unable to verify signature.", nil)
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writeErrorResponse(w, r, ErrSignatureDoesNotMatch, r.URL.Path)
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return
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}
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if !ok {
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writeErrorResponse(w, r, ErrSignatureDoesNotMatch, r.URL.Path)
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return
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}
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if err = checkPostPolicy(formValues); err != nil {
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errorIf(err.Trace(), "Invalid request, policy doesn't match.", nil)
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writeErrorResponse(w, r, ErrMalformedPOSTRequest, r.URL.Path)
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return
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}
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objectInfo, err := api.Filesystem.CreateObject(bucket, object, -1, fileBody, nil)
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if err != nil {
|
|
errorIf(err.Trace(), "CreateObject failed.", nil)
|
|
switch err.ToGoError().(type) {
|
|
case fs.RootPathFull:
|
|
writeErrorResponse(w, r, ErrRootPathFull, r.URL.Path)
|
|
case fs.BucketNotFound:
|
|
writeErrorResponse(w, r, ErrNoSuchBucket, r.URL.Path)
|
|
case fs.BucketNameInvalid:
|
|
writeErrorResponse(w, r, ErrInvalidBucketName, r.URL.Path)
|
|
case fs.BadDigest:
|
|
writeErrorResponse(w, r, ErrBadDigest, r.URL.Path)
|
|
case fs.IncompleteBody:
|
|
writeErrorResponse(w, r, ErrIncompleteBody, r.URL.Path)
|
|
default:
|
|
writeErrorResponse(w, r, ErrInternalError, r.URL.Path)
|
|
}
|
|
return
|
|
}
|
|
if objectInfo.MD5Sum != "" {
|
|
w.Header().Set("ETag", "\""+objectInfo.MD5Sum+"\"")
|
|
}
|
|
writeSuccessResponse(w, nil)
|
|
}
|
|
|
|
// HeadBucketHandler - HEAD Bucket
|
|
// ----------
|
|
// This operation is useful to determine if a bucket exists.
|
|
// The operation returns a 200 OK if the bucket exists and you
|
|
// have permission to access it. Otherwise, the operation might
|
|
// return responses such as 404 Not Found and 403 Forbidden.
|
|
func (api storageAPI) HeadBucketHandler(w http.ResponseWriter, r *http.Request) {
|
|
vars := mux.Vars(r)
|
|
bucket := vars["bucket"]
|
|
|
|
switch getRequestAuthType(r) {
|
|
default:
|
|
// For all unknown auth types return error.
|
|
writeErrorResponse(w, r, ErrAccessDenied, r.URL.Path)
|
|
return
|
|
case authTypePresigned, authTypeSigned:
|
|
if s3Error := isReqAuthenticated(r); s3Error != ErrNone {
|
|
writeErrorResponse(w, r, s3Error, r.URL.Path)
|
|
return
|
|
}
|
|
}
|
|
|
|
_, err := api.Filesystem.GetBucketInfo(bucket)
|
|
if err != nil {
|
|
errorIf(err.Trace(), "GetBucketInfo failed.", nil)
|
|
switch err.ToGoError().(type) {
|
|
case fs.BucketNotFound:
|
|
writeErrorResponse(w, r, ErrNoSuchBucket, r.URL.Path)
|
|
case fs.BucketNameInvalid:
|
|
writeErrorResponse(w, r, ErrInvalidBucketName, r.URL.Path)
|
|
default:
|
|
writeErrorResponse(w, r, ErrInternalError, r.URL.Path)
|
|
}
|
|
return
|
|
}
|
|
writeSuccessResponse(w, nil)
|
|
}
|
|
|
|
// DeleteBucketHandler - Delete bucket
|
|
func (api storageAPI) DeleteBucketHandler(w http.ResponseWriter, r *http.Request) {
|
|
vars := mux.Vars(r)
|
|
bucket := vars["bucket"]
|
|
|
|
switch getRequestAuthType(r) {
|
|
default:
|
|
// For all unknown auth types return error.
|
|
writeErrorResponse(w, r, ErrAccessDenied, r.URL.Path)
|
|
return
|
|
case authTypePresigned, authTypeSigned:
|
|
if s3Error := isReqAuthenticated(r); s3Error != ErrNone {
|
|
writeErrorResponse(w, r, s3Error, r.URL.Path)
|
|
return
|
|
}
|
|
}
|
|
|
|
err := api.Filesystem.DeleteBucket(bucket)
|
|
if err != nil {
|
|
errorIf(err.Trace(), "DeleteBucket failed.", nil)
|
|
switch err.ToGoError().(type) {
|
|
case fs.BucketNotFound:
|
|
writeErrorResponse(w, r, ErrNoSuchBucket, r.URL.Path)
|
|
case fs.BucketNotEmpty:
|
|
writeErrorResponse(w, r, ErrBucketNotEmpty, r.URL.Path)
|
|
default:
|
|
writeErrorResponse(w, r, ErrInternalError, r.URL.Path)
|
|
}
|
|
return
|
|
}
|
|
|
|
// Delete bucket access policy, if present - ignore any errors.
|
|
removeBucketPolicy(bucket)
|
|
|
|
// Write success response.
|
|
writeSuccessNoContent(w)
|
|
}
|