mirror of
https://github.com/minio/minio
synced 2024-09-06 00:37:25 +00:00
627 lines
19 KiB
Go
627 lines
19 KiB
Go
/*
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* Minio Cloud Storage, (C) 2015, 2016, 2017 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 cmd
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import (
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"encoding/base64"
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"encoding/xml"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"path"
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"strings"
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"sync"
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mux "github.com/gorilla/mux"
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"github.com/minio/minio-go/pkg/set"
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)
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// http://docs.aws.amazon.com/AmazonS3/latest/dev/using-with-s3-actions.html
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// Enforces bucket policies for a bucket for a given tatusaction.
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func enforceBucketPolicy(bucket, action, resource, referer string, queryParams url.Values) (s3Error APIErrorCode) {
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// Verify if bucket actually exists
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if err := checkBucketExist(bucket, newObjectLayerFn()); err != nil {
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err = errorCause(err)
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switch err.(type) {
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case BucketNameInvalid:
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// Return error for invalid bucket name.
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return ErrInvalidBucketName
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case BucketNotFound:
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// For no bucket found we return NoSuchBucket instead.
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return ErrNoSuchBucket
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}
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errorIf(err, "Unable to read bucket policy.")
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// Return internal error for any other errors so that we can investigate.
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return ErrInternalError
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}
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// Fetch bucket policy, if policy is not set return access denied.
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policy := globalBucketPolicies.GetBucketPolicy(bucket)
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if policy == nil {
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return ErrAccessDenied
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}
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// Construct resource in 'arn:aws:s3:::examplebucket/object' format.
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arn := bucketARNPrefix + strings.TrimSuffix(strings.TrimPrefix(resource, "/"), "/")
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// Get conditions for policy verification.
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conditionKeyMap := make(map[string]set.StringSet)
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for queryParam := range queryParams {
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conditionKeyMap[queryParam] = set.CreateStringSet(queryParams.Get(queryParam))
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}
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// Add request referer to conditionKeyMap if present.
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if referer != "" {
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conditionKeyMap["referer"] = set.CreateStringSet(referer)
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}
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// Validate action, resource and conditions with current policy statements.
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if !bucketPolicyEvalStatements(action, arn, conditionKeyMap, policy.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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// Check if the action is allowed on the bucket/prefix.
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func isBucketActionAllowed(action, bucket, prefix string) bool {
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policy := globalBucketPolicies.GetBucketPolicy(bucket)
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if policy == nil {
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return false
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}
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resource := bucketARNPrefix + path.Join(bucket, prefix)
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var conditionKeyMap map[string]set.StringSet
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// Validate action, resource and conditions with current policy statements.
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if !bucketPolicyEvalStatements(action, resource, conditionKeyMap, policy.Statements) {
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return false
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}
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return true
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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 objectAPIHandlers) 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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objectAPI := api.ObjectAPI()
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if objectAPI == nil {
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writeErrorResponse(w, ErrServerNotInitialized, r.URL)
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return
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}
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s3Error := checkRequestAuthType(r, bucket, "s3:GetBucketLocation", globalMinioDefaultRegion)
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if s3Error == ErrInvalidRegion {
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// Clients like boto3 send getBucketLocation() call signed with region that is configured.
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s3Error = checkRequestAuthType(r, "", "s3:GetBucketLocation", serverConfig.GetRegion())
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}
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if s3Error != ErrNone {
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writeErrorResponse(w, s3Error, r.URL)
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return
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}
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if _, err := objectAPI.GetBucketInfo(bucket); err != nil {
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errorIf(err, "Unable to fetch bucket info.")
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writeErrorResponse(w, toAPIErrorCode(err), r.URL)
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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 != globalMinioDefaultRegion {
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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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// Write success response.
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writeSuccessResponseXML(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 objectAPIHandlers) 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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objectAPI := api.ObjectAPI()
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if objectAPI == nil {
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writeErrorResponse(w, ErrServerNotInitialized, r.URL)
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return
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}
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if s3Error := checkRequestAuthType(r, bucket, "s3:ListBucketMultipartUploads", serverConfig.GetRegion()); s3Error != ErrNone {
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writeErrorResponse(w, s3Error, r.URL)
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return
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}
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prefix, keyMarker, uploadIDMarker, delimiter, maxUploads, _ := getBucketMultipartResources(r.URL.Query())
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if maxUploads < 0 {
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writeErrorResponse(w, ErrInvalidMaxUploads, r.URL)
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return
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}
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if keyMarker != "" {
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// Marker not common with prefix is not implemented.
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if !hasPrefix(keyMarker, prefix) {
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writeErrorResponse(w, ErrNotImplemented, r.URL)
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return
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}
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}
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listMultipartsInfo, err := objectAPI.ListMultipartUploads(bucket, prefix, keyMarker, uploadIDMarker, delimiter, maxUploads)
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if err != nil {
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errorIf(err, "Unable to list multipart uploads.")
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writeErrorResponse(w, toAPIErrorCode(err), r.URL)
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return
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}
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// generate response
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response := generateListMultipartUploadsResponse(bucket, listMultipartsInfo)
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encodedSuccessResponse := encodeResponse(response)
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// write success response.
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writeSuccessResponseXML(w, encodedSuccessResponse)
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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 objectAPIHandlers) ListBucketsHandler(w http.ResponseWriter, r *http.Request) {
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objectAPI := api.ObjectAPI()
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if objectAPI == nil {
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writeErrorResponse(w, ErrServerNotInitialized, r.URL)
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return
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}
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// ListBuckets does not have any bucket action.
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s3Error := checkRequestAuthType(r, "", "", globalMinioDefaultRegion)
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if s3Error == ErrInvalidRegion {
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// Clients like boto3 send listBuckets() call signed with region that is configured.
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s3Error = checkRequestAuthType(r, "", "", serverConfig.GetRegion())
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}
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if s3Error != ErrNone {
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writeErrorResponse(w, s3Error, r.URL)
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return
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}
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// Invoke the list buckets.
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bucketsInfo, err := objectAPI.ListBuckets()
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if err != nil {
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errorIf(err, "Unable to list buckets.")
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writeErrorResponse(w, toAPIErrorCode(err), r.URL)
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return
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}
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// Generate response.
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response := generateListBucketsResponse(bucketsInfo)
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encodedSuccessResponse := encodeResponse(response)
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// Write response.
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writeSuccessResponseXML(w, encodedSuccessResponse)
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}
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// DeleteMultipleObjectsHandler - deletes multiple objects.
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func (api objectAPIHandlers) 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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objectAPI := api.ObjectAPI()
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if objectAPI == nil {
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writeErrorResponse(w, ErrServerNotInitialized, r.URL)
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return
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}
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if s3Error := checkRequestAuthType(r, bucket, "s3:DeleteObject", serverConfig.GetRegion()); s3Error != ErrNone {
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writeErrorResponse(w, s3Error, r.URL)
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return
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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, ErrMissingContentLength, r.URL)
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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, ErrMissingContentMD5, r.URL)
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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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if _, err := io.ReadFull(r.Body, deleteXMLBytes); err != nil {
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errorIf(err, "Unable to read HTTP body.")
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writeErrorResponse(w, ErrInternalError, r.URL)
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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 err := xml.Unmarshal(deleteXMLBytes, deleteObjects); err != nil {
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errorIf(err, "Unable to unmarshal delete objects request XML.")
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writeErrorResponse(w, ErrMalformedXML, r.URL)
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return
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}
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var wg = &sync.WaitGroup{} // Allocate a new wait group.
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var dErrs = make([]error, len(deleteObjects.Objects))
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// Delete all requested objects in parallel.
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for index, object := range deleteObjects.Objects {
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wg.Add(1)
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go func(i int, obj ObjectIdentifier) {
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defer wg.Done()
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dErr := objectAPI.DeleteObject(bucket, obj.ObjectName)
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if dErr != nil {
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dErrs[i] = dErr
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}
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}(index, object)
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}
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wg.Wait()
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// Collect deleted objects and errors if any.
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var deletedObjects []ObjectIdentifier
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var deleteErrors []DeleteError
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for index, err := range dErrs {
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object := deleteObjects.Objects[index]
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// Success deleted objects are collected separately.
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if err == nil {
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deletedObjects = append(deletedObjects, object)
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continue
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}
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if _, ok := errorCause(err).(ObjectNotFound); ok {
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// If the object is not found it should be
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// accounted as deleted as per S3 spec.
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deletedObjects = append(deletedObjects, object)
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continue
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}
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errorIf(err, "Unable to delete object. %s", object.ObjectName)
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// Error during delete should be collected separately.
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deleteErrors = append(deleteErrors, DeleteError{
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Code: errorCodeResponse[toAPIErrorCode(err)].Code,
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Message: errorCodeResponse[toAPIErrorCode(err)].Description,
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Key: object.ObjectName,
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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 success response.
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writeSuccessResponseXML(w, encodedSuccessResponse)
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// Notify deleted event for objects.
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for _, dobj := range deletedObjects {
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eventNotify(eventData{
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Type: ObjectRemovedDelete,
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Bucket: bucket,
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ObjInfo: ObjectInfo{
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Name: dobj.ObjectName,
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},
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ReqParams: map[string]string{
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"sourceIPAddress": r.RemoteAddr,
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},
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})
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}
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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 objectAPIHandlers) PutBucketHandler(w http.ResponseWriter, r *http.Request) {
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objectAPI := api.ObjectAPI()
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if objectAPI == nil {
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writeErrorResponse(w, ErrServerNotInitialized, r.URL)
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return
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}
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// PutBucket does not have any bucket action.
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s3Error := checkRequestAuthType(r, "", "", globalMinioDefaultRegion)
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if s3Error == ErrInvalidRegion {
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// Clients like boto3 send putBucket() call signed with region that is configured.
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s3Error = checkRequestAuthType(r, "", "", serverConfig.GetRegion())
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}
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if s3Error != ErrNone {
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writeErrorResponse(w, s3Error, r.URL)
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return
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}
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vars := mux.Vars(r)
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bucket := vars["bucket"]
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// Validate if incoming location constraint is valid, reject
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// requests which do not follow valid region requirements.
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if s3Error := isValidLocationConstraint(r); s3Error != ErrNone {
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writeErrorResponse(w, s3Error, r.URL)
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return
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}
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bucketLock := globalNSMutex.NewNSLock(bucket, "")
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bucketLock.Lock()
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defer bucketLock.Unlock()
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// Proceed to creating a bucket.
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err := objectAPI.MakeBucket(bucket)
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if err != nil {
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errorIf(err, "Unable to create a bucket.")
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writeErrorResponse(w, toAPIErrorCode(err), r.URL)
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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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writeSuccessResponseHeadersOnly(w)
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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 objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *http.Request) {
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objectAPI := api.ObjectAPI()
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if objectAPI == nil {
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writeErrorResponse(w, ErrServerNotInitialized, r.URL)
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return
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}
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// Require Content-Length to be set in the request
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size := r.ContentLength
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if size < 0 {
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writeErrorResponse(w, ErrMissingContentLength, r.URL)
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return
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}
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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, err := r.MultipartReader()
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if err != nil {
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errorIf(err, "Unable to initialize multipart reader.")
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writeErrorResponse(w, ErrMalformedPOSTRequest, r.URL)
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return
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}
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// Read multipart data and save in memory and in the disk if needed
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form, err := reader.ReadForm(maxFormMemory)
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if err != nil {
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errorIf(err, "Unable to initialize multipart reader.")
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writeErrorResponse(w, ErrMalformedPOSTRequest, r.URL)
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return
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}
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// Remove all tmp files creating during multipart upload
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defer form.RemoveAll()
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// Extract all form fields
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fileBody, fileName, fileSize, formValues, err := extractPostPolicyFormValues(form)
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if err != nil {
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errorIf(err, "Unable to parse form values.")
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writeErrorResponse(w, ErrMalformedPOSTRequest, r.URL)
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return
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}
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// Check if file is provided, error out otherwise.
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if fileBody == nil {
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writeErrorResponse(w, ErrPOSTFileRequired, r.URL)
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return
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}
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// Close multipart file
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defer fileBody.Close()
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bucket := mux.Vars(r)["bucket"]
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formValues["Bucket"] = bucket
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if fileName != "" && strings.Contains(formValues["Key"], "${filename}") {
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// S3 feature to replace ${filename} found in Key form field
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// by the filename attribute passed in multipart
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formValues["Key"] = strings.Replace(formValues["Key"], "${filename}", fileName, -1)
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}
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object := formValues["Key"]
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// Verify policy signature.
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apiErr := doesPolicySignatureMatch(formValues)
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if apiErr != ErrNone {
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writeErrorResponse(w, apiErr, r.URL)
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return
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}
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policyBytes, err := base64.StdEncoding.DecodeString(formValues["Policy"])
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if err != nil {
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writeErrorResponse(w, ErrMalformedPOSTRequest, r.URL)
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return
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}
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postPolicyForm, err := parsePostPolicyForm(string(policyBytes))
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if err != nil {
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writeErrorResponse(w, ErrMalformedPOSTRequest, r.URL)
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return
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}
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// Make sure formValues adhere to policy restrictions.
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if apiErr = checkPostPolicy(formValues, postPolicyForm); apiErr != ErrNone {
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writeErrorResponse(w, apiErr, r.URL)
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return
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}
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// Ensure that the object size is within expected range, also the file size
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// should not exceed the maximum single Put size (5 GiB)
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lengthRange := postPolicyForm.Conditions.ContentLengthRange
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if lengthRange.Valid {
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if fileSize < lengthRange.Min {
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errorIf(err, "Unable to create object.")
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writeErrorResponse(w, toAPIErrorCode(errDataTooSmall), r.URL)
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return
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}
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if fileSize > lengthRange.Max || fileSize > maxObjectSize {
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errorIf(err, "Unable to create object.")
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writeErrorResponse(w, toAPIErrorCode(errDataTooLarge), r.URL)
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return
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}
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}
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// Extract metadata to be saved from received Form.
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metadata := extractMetadataFromForm(formValues)
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sha256sum := ""
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objectLock := globalNSMutex.NewNSLock(bucket, object)
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objectLock.Lock()
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defer objectLock.Unlock()
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objInfo, err := objectAPI.PutObject(bucket, object, fileSize, fileBody, metadata, sha256sum)
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if err != nil {
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errorIf(err, "Unable to create object.")
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writeErrorResponse(w, toAPIErrorCode(err), r.URL)
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return
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}
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w.Header().Set("ETag", "\""+objInfo.MD5Sum+"\"")
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w.Header().Set("Location", getObjectLocation(bucket, object))
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successRedirect := formValues[http.CanonicalHeaderKey("success_action_redirect")]
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successStatus := formValues[http.CanonicalHeaderKey("success_action_status")]
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if successStatus == "" && successRedirect == "" {
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writeSuccessNoContent(w)
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} else {
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if successRedirect != "" {
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redirectURL := successRedirect + "?" + fmt.Sprintf("bucket=%s&key=%s&etag=%s",
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bucket,
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getURLEncodedName(object),
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getURLEncodedName("\""+objInfo.MD5Sum+"\""))
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writeRedirectSeeOther(w, redirectURL)
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} else {
|
|
// Decide what http response to send depending on success_action_status parameter
|
|
switch successStatus {
|
|
case "201":
|
|
resp := encodeResponse(PostResponse{
|
|
Bucket: bucket,
|
|
Key: object,
|
|
ETag: "\"" + objInfo.MD5Sum + "\"",
|
|
Location: getObjectLocation(bucket, object),
|
|
})
|
|
writeResponse(w, http.StatusCreated, resp, "application/xml")
|
|
case "200":
|
|
writeSuccessResponseHeadersOnly(w)
|
|
default:
|
|
writeSuccessNoContent(w)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Notify object created event.
|
|
eventNotify(eventData{
|
|
Type: ObjectCreatedPost,
|
|
Bucket: bucket,
|
|
ObjInfo: objInfo,
|
|
ReqParams: map[string]string{
|
|
"sourceIPAddress": r.RemoteAddr,
|
|
},
|
|
})
|
|
}
|
|
|
|
// 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 objectAPIHandlers) HeadBucketHandler(w http.ResponseWriter, r *http.Request) {
|
|
vars := mux.Vars(r)
|
|
bucket := vars["bucket"]
|
|
|
|
objectAPI := api.ObjectAPI()
|
|
if objectAPI == nil {
|
|
writeErrorResponseHeadersOnly(w, ErrServerNotInitialized)
|
|
return
|
|
}
|
|
|
|
if s3Error := checkRequestAuthType(r, bucket, "s3:ListBucket", serverConfig.GetRegion()); s3Error != ErrNone {
|
|
writeErrorResponseHeadersOnly(w, s3Error)
|
|
return
|
|
}
|
|
|
|
bucketLock := globalNSMutex.NewNSLock(bucket, "")
|
|
bucketLock.RLock()
|
|
defer bucketLock.RUnlock()
|
|
|
|
if _, err := objectAPI.GetBucketInfo(bucket); err != nil {
|
|
errorIf(err, "Unable to fetch bucket info.")
|
|
writeErrorResponseHeadersOnly(w, toAPIErrorCode(err))
|
|
return
|
|
}
|
|
|
|
writeSuccessResponseHeadersOnly(w)
|
|
}
|
|
|
|
// DeleteBucketHandler - Delete bucket
|
|
func (api objectAPIHandlers) DeleteBucketHandler(w http.ResponseWriter, r *http.Request) {
|
|
objectAPI := api.ObjectAPI()
|
|
if objectAPI == nil {
|
|
writeErrorResponse(w, ErrServerNotInitialized, r.URL)
|
|
return
|
|
}
|
|
|
|
// DeleteBucket does not have any bucket action.
|
|
if s3Error := checkRequestAuthType(r, "", "", serverConfig.GetRegion()); s3Error != ErrNone {
|
|
writeErrorResponse(w, s3Error, r.URL)
|
|
return
|
|
}
|
|
|
|
vars := mux.Vars(r)
|
|
bucket := vars["bucket"]
|
|
|
|
bucketLock := globalNSMutex.NewNSLock(bucket, "")
|
|
bucketLock.Lock()
|
|
defer bucketLock.Unlock()
|
|
|
|
// Attempt to delete bucket.
|
|
if err := objectAPI.DeleteBucket(bucket); err != nil {
|
|
errorIf(err, "Unable to delete a bucket.")
|
|
writeErrorResponse(w, toAPIErrorCode(err), r.URL)
|
|
return
|
|
}
|
|
|
|
// Delete bucket access policy, if present - ignore any errors.
|
|
_ = removeBucketPolicy(bucket, objectAPI)
|
|
|
|
// Delete notification config, if present - ignore any errors.
|
|
_ = removeNotificationConfig(bucket, objectAPI)
|
|
|
|
// Delete listener config, if present - ignore any errors.
|
|
_ = removeListenerConfig(bucket, objectAPI)
|
|
|
|
// Write success response.
|
|
writeSuccessNoContent(w)
|
|
}
|