minio/server-api-bucket-handlers.go

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/*
* Minio Cloud Storage, (C) 2015 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package main
import (
"net/http"
"github.com/gorilla/mux"
"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"
)
func (api API) isValidOp(w http.ResponseWriter, req *http.Request) bool {
vars := mux.Vars(req)
bucket := vars["bucket"]
bucketMetadata, err := api.Donut.GetBucketMetadata(bucket)
if err != nil {
errorIf(err.Trace(), "GetBucketMetadata failed.", nil)
switch err.ToGoError().(type) {
case donut.BucketNotFound:
writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
return false
case donut.BucketNameInvalid:
writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
return false
default:
writeErrorResponse(w, req, InternalError, req.URL.Path)
return false
}
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}
if _, err = stripAccessKeyID(req.Header.Get("Authorization")); err != nil {
if bucketMetadata.ACL.IsPrivate() {
return true
//uncomment this when we have webcli
//writeErrorResponse(w, req, AccessDenied, req.URL.Path)
//return false
}
if bucketMetadata.ACL.IsPublicRead() && req.Method == "PUT" {
return true
//uncomment this when we have webcli
//writeErrorResponse(w, req, AccessDenied, req.URL.Path)
//return false
}
}
return true
}
// ListMultipartUploadsHandler - GET Bucket (List Multipart uploads)
// -------------------------
// This operation lists in-progress multipart uploads. An in-progress
// multipart upload is a multipart upload that has been initiated,
// using the Initiate Multipart Upload request, but has not yet been completed or aborted.
// This operation returns at most 1,000 multipart uploads in the response.
//
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func (api API) ListMultipartUploadsHandler(w http.ResponseWriter, req *http.Request) {
// Ticket master block
{
op := APIOperation{}
op.ProceedCh = make(chan struct{})
api.OP <- op
// block until ticket master gives us a go
<-op.ProceedCh
}
if !api.isValidOp(w, req) {
return
}
resources := getBucketMultipartResources(req.URL.Query())
if resources.MaxUploads < 0 {
writeErrorResponse(w, req, InvalidMaxUploads, req.URL.Path)
return
}
if resources.MaxUploads == 0 {
resources.MaxUploads = maxObjectList
}
vars := mux.Vars(req)
bucket := vars["bucket"]
resources, err := api.Donut.ListMultipartUploads(bucket, resources)
if err != nil {
errorIf(err.Trace(), "ListMultipartUploads failed.", nil)
switch err.ToGoError().(type) {
case donut.BucketNotFound:
writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
default:
writeErrorResponse(w, req, InternalError, req.URL.Path)
}
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return
}
// generate response
response := generateListMultipartUploadsResponse(bucket, resources)
encodedSuccessResponse := encodeSuccessResponse(response)
// write headers
setCommonHeaders(w, len(encodedSuccessResponse))
// write body
w.Write(encodedSuccessResponse)
}
// ListObjectsHandler - GET Bucket (List Objects)
// -------------------------
// This implementation of the GET operation returns some or all (up to 1000)
// of the objects in a bucket. You can use the request parameters as selection
// criteria to return a subset of the objects in a bucket.
//
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func (api API) ListObjectsHandler(w http.ResponseWriter, req *http.Request) {
// Ticket master block
{
op := APIOperation{}
op.ProceedCh = make(chan struct{})
api.OP <- op
// block until Ticket master gives us a go
<-op.ProceedCh
}
if !api.isValidOp(w, req) {
return
}
if isRequestUploads(req.URL.Query()) {
api.ListMultipartUploadsHandler(w, req)
return
}
resources := getBucketResources(req.URL.Query())
if resources.Maxkeys < 0 {
writeErrorResponse(w, req, InvalidMaxKeys, req.URL.Path)
return
}
if resources.Maxkeys == 0 {
resources.Maxkeys = maxObjectList
}
vars := mux.Vars(req)
bucket := vars["bucket"]
objects, resources, err := api.Donut.ListObjects(bucket, resources)
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if err == nil {
// generate response
response := generateListObjectsResponse(bucket, objects, resources)
encodedSuccessResponse := encodeSuccessResponse(response)
// write headers
setCommonHeaders(w, len(encodedSuccessResponse))
// write body
w.Write(encodedSuccessResponse)
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return
}
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switch err.ToGoError().(type) {
case donut.BucketNameInvalid:
writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
case donut.BucketNotFound:
writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
case donut.ObjectNotFound:
writeErrorResponse(w, req, NoSuchKey, req.URL.Path)
case donut.ObjectNameInvalid:
writeErrorResponse(w, req, NoSuchKey, req.URL.Path)
default:
errorIf(err.Trace(), "ListObjects failed.", nil)
writeErrorResponse(w, req, InternalError, req.URL.Path)
}
}
// ListBucketsHandler - GET Service
// -----------
// This implementation of the GET operation returns a list of all buckets
// owned by the authenticated sender of the request.
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func (api API) ListBucketsHandler(w http.ResponseWriter, req *http.Request) {
// Ticket master block
{
op := APIOperation{}
op.ProceedCh = make(chan struct{})
api.OP <- op
// block until Ticket master gives us a go
<-op.ProceedCh
}
// uncomment this when we have webcli
// without access key credentials one cannot list buckets
// if _, err := StripAccessKeyID(req); err != nil {
// writeErrorResponse(w, req, AccessDenied, req.URL.Path)
// return
// }
buckets, err := api.Donut.ListBuckets()
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if err == nil {
// generate response
response := generateListBucketsResponse(buckets)
encodedSuccessResponse := encodeSuccessResponse(response)
// write headers
setCommonHeaders(w, len(encodedSuccessResponse))
// write response
w.Write(encodedSuccessResponse)
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return
}
errorIf(err.Trace(), "ListBuckets failed.", nil)
writeErrorResponse(w, req, InternalError, req.URL.Path)
}
// PutBucketHandler - PUT Bucket
// ----------
// 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) {
// Ticket master block
{
op := APIOperation{}
op.ProceedCh = make(chan struct{})
api.OP <- op
// block until Ticket master gives us a go
<-op.ProceedCh
}
// uncomment this when we have webcli
// without access key credentials one cannot create a bucket
// if _, err := StripAccessKeyID(req); err != nil {
// writeErrorResponse(w, req, AccessDenied, req.URL.Path)
// return
// }
if isRequestBucketACL(req.URL.Query()) {
api.PutBucketACLHandler(w, req)
return
}
// read from 'x-amz-acl'
aclType := getACLType(req)
if aclType == unsupportedACLType {
writeErrorResponse(w, req, NotImplemented, req.URL.Path)
return
}
vars := mux.Vars(req)
bucket := vars["bucket"]
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var signature *signv4.Signature
if _, ok := req.Header["Authorization"]; ok {
// Init signature V4 verification
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var err *probe.Error
signature, err = initSignatureV4(req)
if err != nil {
errorIf(err.Trace(), "Initializing signature v4 failed.", nil)
writeErrorResponse(w, req, InternalError, req.URL.Path)
return
}
}
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// if body of request is non-nil then check for validity of Content-Length
if req.Body != nil {
/// if Content-Length missing, deny the request
size := req.Header.Get("Content-Length")
if size == "" {
writeErrorResponse(w, req, MissingContentLength, req.URL.Path)
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return
}
}
err := api.Donut.MakeBucket(bucket, getACLTypeString(aclType), req.Body, signature)
if err != nil {
errorIf(err.Trace(), "MakeBucket failed.", nil)
switch err.ToGoError().(type) {
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case signv4.DoesNotMatch:
writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
case donut.TooManyBuckets:
writeErrorResponse(w, req, TooManyBuckets, req.URL.Path)
case donut.BucketNameInvalid:
writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
case donut.BucketExists:
writeErrorResponse(w, req, BucketAlreadyExists, req.URL.Path)
default:
writeErrorResponse(w, req, InternalError, req.URL.Path)
}
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return
}
// Make sure to add Location information here only for bucket
w.Header().Set("Location", "/"+bucket)
writeSuccessResponse(w)
}
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// PostPolicyBucketHandler - POST policy
// ----------
// This implementation of the POST operation handles object creation with a specified
// signature policy in multipart/form-data
func (api API) PostPolicyBucketHandler(w http.ResponseWriter, req *http.Request) {
// Ticket master block
{
op := APIOperation{}
op.ProceedCh = make(chan struct{})
api.OP <- op
// block until Ticket master gives us a go
<-op.ProceedCh
}
// Here the parameter is the size of the form data that should
// be loaded in memory, the remaining being put in temporary
// files
reader, err := req.MultipartReader()
if err != nil {
errorIf(probe.NewError(err), "Unable to initialize multipart reader.", nil)
writeErrorResponse(w, req, MalformedPOSTRequest, req.URL.Path)
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return
}
fileBody, formValues, perr := extractHTTPFormValues(reader)
if perr != nil {
errorIf(perr.Trace(), "Unable to parse form values.", nil)
writeErrorResponse(w, req, MalformedPOSTRequest, req.URL.Path)
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return
}
bucket := mux.Vars(req)["bucket"]
formValues["Bucket"] = bucket
object := formValues["key"]
signature, perr := initPostPresignedPolicyV4(formValues)
if perr != nil {
errorIf(perr.Trace(), "Unable to initialize post policy presigned.", nil)
writeErrorResponse(w, req, MalformedPOSTRequest, req.URL.Path)
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return
}
if perr = applyPolicy(formValues, signature.PresignedPolicy); perr != nil {
errorIf(perr.Trace(), "Invalid request, policy doesn't match with the endpoint.", nil)
writeErrorResponse(w, req, MalformedPOSTRequest, req.URL.Path)
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return
}
var ok bool
if ok, perr = signature.DoesPolicySignatureMatch(formValues["X-Amz-Date"]); perr != nil {
errorIf(perr.Trace(), "Unable to verify signature.", nil)
writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
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return
}
if ok == false {
writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
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return
}
metadata, perr := api.Donut.CreateObject(bucket, object, "", 0, fileBody, nil, nil)
if perr != nil {
errorIf(perr.Trace(), "CreateObject failed.", nil)
switch perr.ToGoError().(type) {
case donut.BucketNotFound:
writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
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case donut.BucketNameInvalid:
writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
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case donut.ObjectExists:
writeErrorResponse(w, req, MethodNotAllowed, req.URL.Path)
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case donut.BadDigest:
writeErrorResponse(w, req, BadDigest, req.URL.Path)
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case signv4.DoesNotMatch:
writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
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case donut.IncompleteBody:
writeErrorResponse(w, req, IncompleteBody, req.URL.Path)
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case donut.EntityTooLarge:
writeErrorResponse(w, req, EntityTooLarge, req.URL.Path)
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case donut.InvalidDigest:
writeErrorResponse(w, req, InvalidDigest, req.URL.Path)
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default:
writeErrorResponse(w, req, InternalError, req.URL.Path)
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}
return
}
w.Header().Set("ETag", metadata.MD5Sum)
writeSuccessResponse(w)
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}
// PutBucketACLHandler - PUT Bucket ACL
// ----------
// 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) {
// Ticket master block
{
op := APIOperation{}
op.ProceedCh = make(chan struct{})
api.OP <- op
// block until Ticket master gives us a go
<-op.ProceedCh
}
// read from 'x-amz-acl'
aclType := getACLType(req)
if aclType == unsupportedACLType {
writeErrorResponse(w, req, NotImplemented, req.URL.Path)
return
}
vars := mux.Vars(req)
bucket := vars["bucket"]
err := api.Donut.SetBucketMetadata(bucket, map[string]string{"acl": getACLTypeString(aclType)})
if err != nil {
errorIf(err.Trace(), "PutBucketACL failed.", nil)
switch err.ToGoError().(type) {
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case signv4.DoesNotMatch:
writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
case donut.BucketNameInvalid:
writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
case donut.BucketNotFound:
writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
default:
writeErrorResponse(w, req, InternalError, req.URL.Path)
}
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return
}
writeSuccessResponse(w)
}
// 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.
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func (api API) HeadBucketHandler(w http.ResponseWriter, req *http.Request) {
// Ticket master block
{
op := APIOperation{}
op.ProceedCh = make(chan struct{})
api.OP <- op
// block until Ticket master gives us a go
<-op.ProceedCh
}
vars := mux.Vars(req)
bucket := vars["bucket"]
_, err := api.Donut.GetBucketMetadata(bucket)
if err != nil {
errorIf(err.Trace(), "GetBucketMetadata failed.", nil)
switch err.ToGoError().(type) {
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case signv4.DoesNotMatch:
writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
case donut.BucketNotFound:
writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
case donut.BucketNameInvalid:
writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
default:
writeErrorResponse(w, req, InternalError, req.URL.Path)
}
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return
}
writeSuccessResponse(w)
}