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492 lines
15 KiB
492 lines
15 KiB
/*
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* Minio Cloud Storage, (C) 2015 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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"net/http"
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"github.com/gorilla/mux"
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"github.com/minio/minio/pkg/donut"
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"github.com/minio/minio/pkg/probe"
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signv4 "github.com/minio/minio/pkg/signature"
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)
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func (api API) isValidOp(w http.ResponseWriter, req *http.Request) bool {
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vars := mux.Vars(req)
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bucket := vars["bucket"]
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bucketMetadata, err := api.Donut.GetBucketMetadata(bucket)
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if err != nil {
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errorIf(err.Trace(), "GetBucketMetadata failed.", nil)
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switch err.ToGoError().(type) {
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case donut.BucketNotFound:
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writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
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return false
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case donut.BucketNameInvalid:
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writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
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return false
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default:
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writeErrorResponse(w, req, InternalError, req.URL.Path)
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return false
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}
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}
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if _, err = stripAccessKeyID(req.Header.Get("Authorization")); err != nil {
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if bucketMetadata.ACL.IsPrivate() {
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writeErrorResponse(w, req, AccessDenied, req.URL.Path)
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return false
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}
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if bucketMetadata.ACL.IsPublicRead() && req.Method == "PUT" {
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writeErrorResponse(w, req, AccessDenied, req.URL.Path)
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return false
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}
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}
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return true
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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 completed or aborted.
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// This operation returns at most 1,000 multipart uploads in the response.
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//
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func (api API) ListMultipartUploadsHandler(w http.ResponseWriter, req *http.Request) {
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// Ticket master block
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{
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op := APIOperation{}
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op.ProceedCh = make(chan struct{})
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api.OP <- op
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// block until ticket master gives us a go
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<-op.ProceedCh
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}
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if !api.isValidOp(w, req) {
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return
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}
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resources := getBucketMultipartResources(req.URL.Query())
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if resources.MaxUploads < 0 {
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writeErrorResponse(w, req, InvalidMaxUploads, req.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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vars := mux.Vars(req)
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bucket := vars["bucket"]
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resources, err := api.Donut.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 donut.BucketNotFound:
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writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
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default:
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writeErrorResponse(w, req, InternalError, req.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 := encodeSuccessResponse(response)
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// write headers
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setCommonHeaders(w, len(encodedSuccessResponse))
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// write body
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w.Write(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 API) ListObjectsHandler(w http.ResponseWriter, req *http.Request) {
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// Ticket master block
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{
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op := APIOperation{}
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op.ProceedCh = make(chan struct{})
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api.OP <- op
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// block until Ticket master gives us a go
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<-op.ProceedCh
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}
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if !api.isValidOp(w, req) {
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return
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}
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if isRequestUploads(req.URL.Query()) {
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api.ListMultipartUploadsHandler(w, req)
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return
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}
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resources := getBucketResources(req.URL.Query())
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if resources.Maxkeys < 0 {
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writeErrorResponse(w, req, InvalidMaxKeys, req.URL.Path)
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return
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}
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if resources.Maxkeys == 0 {
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resources.Maxkeys = maxObjectList
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}
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vars := mux.Vars(req)
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bucket := vars["bucket"]
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objects, resources, err := api.Donut.ListObjects(bucket, resources)
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if err == nil {
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// generate response
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response := generateListObjectsResponse(bucket, objects, resources)
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encodedSuccessResponse := encodeSuccessResponse(response)
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// write headers
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setCommonHeaders(w, len(encodedSuccessResponse))
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// write body
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w.Write(encodedSuccessResponse)
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return
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}
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switch err.ToGoError().(type) {
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case donut.BucketNameInvalid:
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writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
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case donut.BucketNotFound:
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writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
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case donut.ObjectNotFound:
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writeErrorResponse(w, req, NoSuchKey, req.URL.Path)
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case donut.ObjectNameInvalid:
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writeErrorResponse(w, req, NoSuchKey, req.URL.Path)
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default:
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errorIf(err.Trace(), "ListObjects failed.", nil)
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writeErrorResponse(w, req, InternalError, req.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 API) ListBucketsHandler(w http.ResponseWriter, req *http.Request) {
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// Ticket master block
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{
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op := APIOperation{}
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op.ProceedCh = make(chan struct{})
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api.OP <- op
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// block until Ticket master gives us a go
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<-op.ProceedCh
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}
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// uncomment this when we have webcli
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// without access key credentials one cannot list buckets
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// if _, err := StripAccessKeyID(req); err != nil {
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// writeErrorResponse(w, req, AccessDenied, req.URL.Path)
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// return
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// }
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buckets, err := api.Donut.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 := encodeSuccessResponse(response)
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// write headers
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setCommonHeaders(w, len(encodedSuccessResponse))
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// write response
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w.Write(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, req, InternalError, req.URL.Path)
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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 API) PutBucketHandler(w http.ResponseWriter, req *http.Request) {
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// Ticket master block
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{
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op := APIOperation{}
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op.ProceedCh = make(chan struct{})
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api.OP <- op
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// block until Ticket master gives us a go
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<-op.ProceedCh
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}
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if _, err := stripAccessKeyID(req.Header.Get("Authorization")); err != nil {
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writeErrorResponse(w, req, AccessDenied, req.URL.Path)
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return
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}
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// read from 'x-amz-acl'
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aclType := getACLType(req)
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if aclType == unsupportedACLType {
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writeErrorResponse(w, req, NotImplemented, req.URL.Path)
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return
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}
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vars := mux.Vars(req)
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bucket := vars["bucket"]
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var signature *signv4.Signature
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if !api.Anonymous {
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if _, ok := req.Header["Authorization"]; ok {
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// Init signature V4 verification
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var err *probe.Error
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signature, err = initSignatureV4(req)
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if err != nil {
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errorIf(err.Trace(), "Initializing signature v4 failed.", nil)
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writeErrorResponse(w, req, InternalError, req.URL.Path)
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return
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}
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}
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}
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// if body of request is non-nil then check for validity of Content-Length
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if req.Body != nil {
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/// if Content-Length missing, deny the request
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size := req.Header.Get("Content-Length")
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if size == "" {
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writeErrorResponse(w, req, MissingContentLength, req.URL.Path)
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return
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}
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}
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err := api.Donut.MakeBucket(bucket, getACLTypeString(aclType), req.Body, signature)
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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 signv4.DoesNotMatch:
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writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
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case donut.TooManyBuckets:
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writeErrorResponse(w, req, TooManyBuckets, req.URL.Path)
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case donut.BucketNameInvalid:
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writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
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case donut.BucketExists:
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writeErrorResponse(w, req, BucketAlreadyExists, req.URL.Path)
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default:
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writeErrorResponse(w, req, InternalError, req.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", "/"+bucket)
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writeSuccessResponse(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 API) PostPolicyBucketHandler(w http.ResponseWriter, req *http.Request) {
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// Ticket master block
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{
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op := APIOperation{}
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op.ProceedCh = make(chan struct{})
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api.OP <- op
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// block until Ticket master gives us a go
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<-op.ProceedCh
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}
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// if body of request is non-nil then check for validity of Content-Length
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if req.Body != nil {
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/// if Content-Length missing, deny the request
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size := req.Header.Get("Content-Length")
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if size == "" {
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writeErrorResponse(w, req, MissingContentLength, req.URL.Path)
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return
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}
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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
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// files
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reader, err := req.MultipartReader()
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if err != nil {
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errorIf(probe.NewError(err), "Unable to initialize multipart reader.", nil)
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writeErrorResponse(w, req, MalformedPOSTRequest, req.URL.Path)
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return
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}
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fileBody, formValues, perr := extractHTTPFormValues(reader)
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if perr != nil {
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errorIf(perr.Trace(), "Unable to parse form values.", nil)
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writeErrorResponse(w, req, MalformedPOSTRequest, req.URL.Path)
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return
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}
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bucket := mux.Vars(req)["bucket"]
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formValues["Bucket"] = bucket
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object := formValues["Key"]
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signature, perr := initPostPresignedPolicyV4(formValues)
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if perr != nil {
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errorIf(perr.Trace(), "Unable to initialize post policy presigned.", nil)
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writeErrorResponse(w, req, MalformedPOSTRequest, req.URL.Path)
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return
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}
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var ok bool
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if ok, perr = signature.DoesPolicySignatureMatch(formValues["X-Amz-Date"]); perr != nil {
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errorIf(perr.Trace(), "Unable to verify signature.", nil)
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writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
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return
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}
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if ok == false {
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writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
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return
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}
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if perr = applyPolicy(formValues); perr != nil {
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errorIf(perr.Trace(), "Invalid request, policy doesn't match with the endpoint.", nil)
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writeErrorResponse(w, req, MalformedPOSTRequest, req.URL.Path)
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return
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}
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metadata, perr := api.Donut.CreateObject(bucket, object, "", 0, fileBody, nil, nil)
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if perr != nil {
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errorIf(perr.Trace(), "CreateObject failed.", nil)
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switch perr.ToGoError().(type) {
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case donut.BucketNotFound:
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writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
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case donut.BucketNameInvalid:
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writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
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case donut.ObjectExists:
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writeErrorResponse(w, req, MethodNotAllowed, req.URL.Path)
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case donut.BadDigest:
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writeErrorResponse(w, req, BadDigest, req.URL.Path)
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case signv4.DoesNotMatch:
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writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
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case donut.IncompleteBody:
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writeErrorResponse(w, req, IncompleteBody, req.URL.Path)
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case donut.EntityTooLarge:
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writeErrorResponse(w, req, EntityTooLarge, req.URL.Path)
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case donut.InvalidDigest:
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writeErrorResponse(w, req, InvalidDigest, req.URL.Path)
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default:
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writeErrorResponse(w, req, InternalError, req.URL.Path)
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}
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return
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}
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w.Header().Set("ETag", metadata.MD5Sum)
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writeSuccessResponse(w)
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}
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// PutBucketACLHandler - PUT Bucket ACL
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// ----------
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// This implementation of the PUT operation modifies the bucketACL for authenticated request
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func (api API) PutBucketACLHandler(w http.ResponseWriter, req *http.Request) {
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// Ticket master block
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{
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op := APIOperation{}
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op.ProceedCh = make(chan struct{})
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api.OP <- op
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// block until Ticket master gives us a go
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<-op.ProceedCh
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}
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// read from 'x-amz-acl'
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aclType := getACLType(req)
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if aclType == unsupportedACLType {
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writeErrorResponse(w, req, NotImplemented, req.URL.Path)
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return
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}
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vars := mux.Vars(req)
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bucket := vars["bucket"]
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err := api.Donut.SetBucketMetadata(bucket, map[string]string{"acl": getACLTypeString(aclType)})
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if err != nil {
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errorIf(err.Trace(), "PutBucketACL failed.", nil)
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switch err.ToGoError().(type) {
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case donut.BucketNameInvalid:
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writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
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case donut.BucketNotFound:
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writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
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default:
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writeErrorResponse(w, req, InternalError, req.URL.Path)
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}
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return
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}
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writeSuccessResponse(w)
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}
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// GetBucketACLHandler - GET ACL on a Bucket
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// ----------
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// This operation uses acl subresource to the return the ``acl``
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// of a bucket. One must have permission to access the bucket to
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// know its ``acl``. This operation willl return response of 404
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// if bucket not found and 403 for invalid credentials.
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func (api API) GetBucketACLHandler(w http.ResponseWriter, req *http.Request) {
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// Ticket master block
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{
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op := APIOperation{}
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op.ProceedCh = make(chan struct{})
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api.OP <- op
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// block until Ticket master gives us a go
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<-op.ProceedCh
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}
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vars := mux.Vars(req)
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bucket := vars["bucket"]
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bucketMetadata, err := api.Donut.GetBucketMetadata(bucket)
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if err != nil {
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errorIf(err.Trace(), "GetBucketMetadata failed.", nil)
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switch err.ToGoError().(type) {
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case donut.BucketNotFound:
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writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
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case donut.BucketNameInvalid:
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writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
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default:
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writeErrorResponse(w, req, InternalError, req.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 := generateAccessControlPolicyResponse(bucketMetadata.ACL)
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encodedSuccessResponse := encodeSuccessResponse(response)
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// write headers
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setCommonHeaders(w, len(encodedSuccessResponse))
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// write body
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w.Write(encodedSuccessResponse)
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}
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// HeadBucketHandler - HEAD Bucket
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// ----------
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// This operation is useful to determine if a bucket exists.
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// The operation returns a 200 OK if the bucket exists and you
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// have permission to access it. Otherwise, the operation might
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// return responses such as 404 Not Found and 403 Forbidden.
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func (api API) HeadBucketHandler(w http.ResponseWriter, req *http.Request) {
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// Ticket master block
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{
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op := APIOperation{}
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op.ProceedCh = make(chan struct{})
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api.OP <- op
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// block until Ticket master gives us a go
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<-op.ProceedCh
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}
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vars := mux.Vars(req)
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bucket := vars["bucket"]
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_, err := api.Donut.GetBucketMetadata(bucket)
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if err != nil {
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errorIf(err.Trace(), "GetBucketMetadata failed.", nil)
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switch err.ToGoError().(type) {
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case donut.BucketNotFound:
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writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
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case donut.BucketNameInvalid:
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writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
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default:
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writeErrorResponse(w, req, InternalError, req.URL.Path)
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}
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return
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}
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writeSuccessResponse(w)
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}
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