Different gateway implementations due to different backend API errors, might return different unsupported errors at our handler layer. Current code posed a problem for us because this information was lost and we would convert it to InternalError in this situation all S3 clients end up retrying the request. To avoid this unexpected situation implement a way to support this cleanly such that the underlying information is not lost which is returned by gateway.
234 lines
7.3 KiB
Go
234 lines
7.3 KiB
Go
/*
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* Minio Cloud Storage, (C) 2018, 2019 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/xml"
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"net/http"
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"github.com/gorilla/mux"
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"github.com/minio/minio/pkg/policy"
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)
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// Data types used for returning dummy tagging XML.
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// These variables shouldn't be used elsewhere.
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// They are only defined to be used in this file alone.
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type tagging struct {
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XMLName xml.Name `xml:"Tagging"`
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TagSet tagSet `xml:"TagSet"`
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}
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type tagSet struct {
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Tag []tagElem `xml:"Tag"`
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}
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type tagElem struct {
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Key string `xml:"Key"`
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Value string `xml:"Value"`
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}
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// GetBucketWebsite - GET bucket website, a dummy api
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func (api objectAPIHandlers) GetBucketWebsiteHandler(w http.ResponseWriter, r *http.Request) {
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writeSuccessResponseHeadersOnly(w)
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w.(http.Flusher).Flush()
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}
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// GetBucketVersioning - GET bucket versioning, a dummy api
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func (api objectAPIHandlers) GetBucketVersioningHandler(w http.ResponseWriter, r *http.Request) {
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writeSuccessResponseHeadersOnly(w)
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w.(http.Flusher).Flush()
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}
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// GetBucketAccelerate - GET bucket accelerate, a dummy api
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func (api objectAPIHandlers) GetBucketAccelerateHandler(w http.ResponseWriter, r *http.Request) {
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writeSuccessResponseHeadersOnly(w)
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w.(http.Flusher).Flush()
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}
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// GetBucketRequestPaymentHandler - GET bucket requestPayment, a dummy api
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func (api objectAPIHandlers) GetBucketRequestPaymentHandler(w http.ResponseWriter, r *http.Request) {
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writeSuccessResponseHeadersOnly(w)
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w.(http.Flusher).Flush()
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}
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// GetBucketLoggingHandler - GET bucket logging, a dummy api
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func (api objectAPIHandlers) GetBucketLoggingHandler(w http.ResponseWriter, r *http.Request) {
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writeSuccessResponseHeadersOnly(w)
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w.(http.Flusher).Flush()
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}
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// GetBucketLifecycleHandler - GET bucket lifecycle, a dummy api
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func (api objectAPIHandlers) GetBucketLifecycleHandler(w http.ResponseWriter, r *http.Request) {
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writeSuccessResponseHeadersOnly(w)
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w.(http.Flusher).Flush()
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}
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// GetBucketReplicationHandler - GET bucket replication, a dummy api
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func (api objectAPIHandlers) GetBucketReplicationHandler(w http.ResponseWriter, r *http.Request) {
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writeSuccessResponseHeadersOnly(w)
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w.(http.Flusher).Flush()
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}
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// DeleteBucketTaggingHandler - DELETE bucket tagging, a dummy api
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func (api objectAPIHandlers) DeleteBucketTaggingHandler(w http.ResponseWriter, r *http.Request) {
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writeSuccessResponseHeadersOnly(w)
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w.(http.Flusher).Flush()
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}
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// DeleteBucketWebsiteHandler - DELETE bucket website, a dummy api
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func (api objectAPIHandlers) DeleteBucketWebsiteHandler(w http.ResponseWriter, r *http.Request) {
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writeSuccessResponseHeadersOnly(w)
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w.(http.Flusher).Flush()
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}
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type allowedMethod string
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// Define strings
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const (
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GET allowedMethod = http.MethodGet
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PUT allowedMethod = http.MethodPut
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HEAD allowedMethod = http.MethodHead
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POST allowedMethod = http.MethodPost
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DELETE allowedMethod = http.MethodDelete
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)
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// GetBucketCorsHandler - GET bucket cors, a dummy api
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func (api objectAPIHandlers) GetBucketCorsHandler(w http.ResponseWriter, r *http.Request) {
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ctx := newContext(r, w, "GetBucketCorsHandler")
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type corsRule struct {
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AllowedHeaders []string `xml:"AllowedHeaders"`
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AllowedMethods []allowedMethod `xml:"AllowedMethod"`
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AllowedOrigins []string `xml:"AllowedOrigin"`
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ExposeHeaders []string `xml:"ExposeHeader"`
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MaxAgeSeconds int64 `xml:"MaxAgeSeconds"`
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}
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type corsConfiguration struct {
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XMLName xml.Name `xml:"CORSConfiguration"`
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CorsRule []corsRule `xml:"CORSRule"`
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}
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vars := mux.Vars(r)
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bucket := vars["bucket"]
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objAPI := api.ObjectAPI()
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if objAPI == nil {
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writeErrorResponse(w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL, guessIsBrowserReq(r))
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return
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}
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// Allow getBucketCors if policy action is set, since this is a dummy call
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// we are simply re-purposing the bucketPolicyAction.
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if s3Error := checkRequestAuthType(ctx, r, policy.GetBucketPolicyAction, bucket, ""); s3Error != ErrNone {
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writeErrorResponse(w, errorCodes.ToAPIErr(s3Error), r.URL, guessIsBrowserReq(r))
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return
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}
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// Validate if bucket exists, before proceeding further...
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_, err := objAPI.GetBucketInfo(ctx, bucket)
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if err != nil {
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writeErrorResponse(w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
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return
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}
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cors := &corsConfiguration{}
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if err := xml.NewEncoder(w).Encode(cors); err != nil {
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writeErrorResponse(w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
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return
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}
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w.(http.Flusher).Flush()
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}
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// GetBucketTaggingHandler - GET bucket tagging, a dummy api
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func (api objectAPIHandlers) GetBucketTaggingHandler(w http.ResponseWriter, r *http.Request) {
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ctx := newContext(r, w, "GetBucketTagging")
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vars := mux.Vars(r)
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bucket := vars["bucket"]
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objAPI := api.ObjectAPI()
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if objAPI == nil {
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writeErrorResponse(w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL, guessIsBrowserReq(r))
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return
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}
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// Allow getBucketTagging if policy action is set, since this is a dummy call
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// we are simply re-purposing the bucketPolicyAction.
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if s3Error := checkRequestAuthType(ctx, r, policy.GetBucketPolicyAction, bucket, ""); s3Error != ErrNone {
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writeErrorResponse(w, errorCodes.ToAPIErr(s3Error), r.URL, guessIsBrowserReq(r))
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return
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}
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// Validate if bucket exists, before proceeding further...
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_, err := objAPI.GetBucketInfo(ctx, bucket)
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if err != nil {
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writeErrorResponse(w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
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return
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}
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tags := &tagging{}
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tags.TagSet.Tag = append(tags.TagSet.Tag, tagElem{})
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if err := xml.NewEncoder(w).Encode(tags); err != nil {
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writeErrorResponse(w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
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return
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}
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w.(http.Flusher).Flush()
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}
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// GetObjectTaggingHandler - GET object tagging, a dummy api
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func (api objectAPIHandlers) GetObjectTaggingHandler(w http.ResponseWriter, r *http.Request) {
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ctx := newContext(r, w, "GetObjectTagging")
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vars := mux.Vars(r)
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bucket := vars["bucket"]
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object := vars["object"]
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objAPI := api.ObjectAPI()
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if objAPI == nil {
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writeErrorResponse(w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL, guessIsBrowserReq(r))
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return
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}
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// Allow getObjectTagging if policy action is set, since this is a dummy call
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// we are simply re-purposing the bucketPolicyAction.
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if s3Error := checkRequestAuthType(ctx, r, policy.GetBucketPolicyAction, bucket, ""); s3Error != ErrNone {
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writeErrorResponse(w, errorCodes.ToAPIErr(s3Error), r.URL, guessIsBrowserReq(r))
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return
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}
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// Validate if object exists, before proceeding further...
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_, err := objAPI.GetObjectInfo(ctx, bucket, object, ObjectOptions{})
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if err != nil {
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writeErrorResponse(w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
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return
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}
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tags := &tagging{}
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tags.TagSet.Tag = append(tags.TagSet.Tag, tagElem{})
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if err := xml.NewEncoder(w).Encode(tags); err != nil {
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writeErrorResponse(w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
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return
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}
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w.(http.Flusher).Flush()
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}
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