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/*
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* MinIO Cloud Storage, (C) 2016, 2017, 2018 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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"io"
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"net/http"
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"reflect"
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"github.com/gorilla/mux"
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"github.com/minio/minio/cmd/logger"
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"github.com/minio/minio/pkg/bucket/policy"
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"github.com/minio/minio/pkg/event"
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)
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const (
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bucketConfigPrefix = "buckets"
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bucketNotificationConfig = "notification.xml"
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)
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// GetBucketNotificationHandler - This HTTP handler returns event notification configuration
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// as per http://docs.aws.amazon.com/AmazonS3/latest/dev/NotificationHowTo.html.
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// It returns empty configuration if its not set.
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func (api objectAPIHandlers) GetBucketNotificationHandler(w http.ResponseWriter, r *http.Request) {
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ctx := newContext(r, w, "GetBucketNotification")
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defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
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vars := mux.Vars(r)
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bucketName := vars["bucket"]
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objAPI := api.ObjectAPI()
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if objAPI == nil {
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writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL, guessIsBrowserReq(r))
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return
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}
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if !objAPI.IsNotificationSupported() {
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writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrNotImplemented), r.URL, guessIsBrowserReq(r))
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return
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}
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if s3Error := checkRequestAuthType(ctx, r, policy.GetBucketNotificationAction, bucketName, ""); s3Error != ErrNone {
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writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL, guessIsBrowserReq(r))
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return
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}
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_, err := objAPI.GetBucketInfo(ctx, bucketName)
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if err != nil {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
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return
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}
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config, err := globalBucketMetadataSys.GetNotificationConfig(bucketName)
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if err != nil {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
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return
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}
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config.SetRegion(globalServerRegion)
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if err = config.Validate(globalServerRegion, globalNotificationSys.targetList); err != nil {
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arnErr, ok := err.(*event.ErrARNNotFound)
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if ok {
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for i, queue := range config.QueueList {
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// Remove ARN not found queues, because we previously allowed
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// adding unexpected entries into the config.
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//
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// With newer config disallowing changing / turning off
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// notification targets without removing ARN in notification
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// configuration we won't see this problem anymore.
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if reflect.DeepEqual(queue.ARN, arnErr.ARN) && i < len(config.QueueList) {
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config.QueueList = append(config.QueueList[:i],
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config.QueueList[i+1:]...)
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}
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// This is a one time activity we shall do this
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// here and allow stale ARN to be removed. We shall
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// never reach a stage where we will have stale
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// notification configs.
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}
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} else {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
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return
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}
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}
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configData, err := xml.Marshal(config)
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if err != nil {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
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return
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}
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writeSuccessResponseXML(w, configData)
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}
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// PutBucketNotificationHandler - This HTTP handler stores given notification configuration as per
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// http://docs.aws.amazon.com/AmazonS3/latest/dev/NotificationHowTo.html.
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func (api objectAPIHandlers) PutBucketNotificationHandler(w http.ResponseWriter, r *http.Request) {
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ctx := newContext(r, w, "PutBucketNotification")
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defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
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objectAPI := api.ObjectAPI()
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if objectAPI == nil {
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writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL, guessIsBrowserReq(r))
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return
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}
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if !objectAPI.IsNotificationSupported() {
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writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrNotImplemented), r.URL, guessIsBrowserReq(r))
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return
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}
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vars := mux.Vars(r)
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bucketName := vars["bucket"]
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if s3Error := checkRequestAuthType(ctx, r, policy.PutBucketNotificationAction, bucketName, ""); s3Error != ErrNone {
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writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL, guessIsBrowserReq(r))
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return
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}
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_, err := objectAPI.GetBucketInfo(ctx, bucketName)
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if err != nil {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
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return
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}
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// PutBucketNotification always needs a Content-Length.
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if r.ContentLength <= 0 {
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writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrMissingContentLength), r.URL, guessIsBrowserReq(r))
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return
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}
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config, err := event.ParseConfig(io.LimitReader(r.Body, r.ContentLength), globalServerRegion, globalNotificationSys.targetList)
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if err != nil {
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apiErr := errorCodes.ToAPIErr(ErrMalformedXML)
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if event.IsEventError(err) {
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apiErr = toAPIError(ctx, err)
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}
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writeErrorResponse(ctx, w, apiErr, r.URL, guessIsBrowserReq(r))
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return
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}
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configData, err := xml.Marshal(config)
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if err != nil {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
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return
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}
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if err = globalBucketMetadataSys.Update(bucketName, bucketNotificationConfig, configData); err != nil {
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writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
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return
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}
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rulesMap := config.ToRulesMap()
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globalNotificationSys.AddRulesMap(bucketName, rulesMap)
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writeSuccessResponseHeadersOnly(w)
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}
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