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minio/pkg/api/api_bucket_handlers.go

268 lines
8.1 KiB

/*
* Minimalist Object 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 api
import (
"net/http"
"strconv"
"github.com/gorilla/mux"
"github.com/minio-io/minio/pkg/iodine"
"github.com/minio-io/minio/pkg/storage/drivers"
"github.com/minio-io/minio/pkg/utils/log"
)
func (server *minioAPI) isValidOp(w http.ResponseWriter, req *http.Request, acceptsContentType contentType) bool {
vars := mux.Vars(req)
bucket := vars["bucket"]
bucketMetadata, err := server.driver.GetBucketMetadata(bucket)
switch iodine.ToError(err).(type) {
case drivers.BucketNotFound:
{
writeErrorResponse(w, req, NoSuchBucket, acceptsContentType, req.URL.Path)
return false
}
case drivers.BucketNameInvalid:
{
writeErrorResponse(w, req, InvalidBucketName, acceptsContentType, req.URL.Path)
return false
}
case nil:
if stripAccessKey(req) == "" && bucketMetadata.ACL.IsPrivate() {
return true
// Uncomment this before release
// writeErrorResponse(w, req, AccessDenied, acceptsContentType, req.URL.Path)
// return false
}
if bucketMetadata.ACL.IsPublicRead() && req.Method == "PUT" {
return true
// Uncomment this before release
// writeErrorResponse(w, req, AccessDenied, acceptsContentType, req.URL.Path)
// return false
}
}
return true
}
// 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.
//
func (server *minioAPI) listObjectsHandler(w http.ResponseWriter, req *http.Request) {
acceptsContentType := getContentType(req)
if acceptsContentType == unknownContentType {
writeErrorResponse(w, req, NotAcceptable, acceptsContentType, req.URL.Path)
return
}
// verify if bucket allows this operation
if !server.isValidOp(w, req, acceptsContentType) {
return
}
resources := getBucketResources(req.URL.Query())
if resources.Maxkeys == 0 {
resources.Maxkeys = maxObjectList
}
vars := mux.Vars(req)
bucket := vars["bucket"]
objects, resources, err := server.driver.ListObjects(bucket, resources)
switch err := iodine.ToError(err).(type) {
case nil: // success
{
// generate response
response := generateListObjectsResponse(bucket, objects, resources)
encodedSuccessResponse := encodeSuccessResponse(response, acceptsContentType)
// write headers
setCommonHeaders(w, getContentTypeString(acceptsContentType))
// set content-length to the size of the body
w.Header().Set("Content-Length", strconv.Itoa(len(encodedSuccessResponse)))
w.WriteHeader(http.StatusOK)
// write body
w.Write(encodedSuccessResponse)
}
case drivers.ObjectNotFound:
{
writeErrorResponse(w, req, NoSuchKey, acceptsContentType, req.URL.Path)
}
case drivers.ObjectNameInvalid:
{
writeErrorResponse(w, req, NoSuchKey, acceptsContentType, req.URL.Path)
}
default:
{
log.Error.Println(iodine.New(err, nil))
writeErrorResponse(w, req, InternalError, acceptsContentType, req.URL.Path)
}
}
}
// GET Service
// -----------
// This implementation of the GET operation returns a list of all buckets
// owned by the authenticated sender of the request.
func (server *minioAPI) listBucketsHandler(w http.ResponseWriter, req *http.Request) {
acceptsContentType := getContentType(req)
if acceptsContentType == unknownContentType {
writeErrorResponse(w, req, NotAcceptable, acceptsContentType, req.URL.Path)
return
}
buckets, err := server.driver.ListBuckets()
// cannot fallthrough in (type) switch :(
switch err := iodine.ToError(err).(type) {
case nil:
{
// generate response
response := generateListBucketsResponse(buckets)
encodedSuccessResponse := encodeSuccessResponse(response, acceptsContentType)
// write headers
setCommonHeaders(w, getContentTypeString(acceptsContentType))
// set content-length to the size of the body
w.Header().Set("Content-Length", strconv.Itoa(len(encodedSuccessResponse)))
w.WriteHeader(http.StatusOK)
// write response
w.Write(encodedSuccessResponse)
}
default:
{
log.Error.Println(iodine.New(err, nil))
writeErrorResponse(w, req, InternalError, acceptsContentType, req.URL.Path)
}
}
}
// PUT Bucket
// ----------
// This implementation of the PUT operation creates a new bucket for authenticated request
func (server *minioAPI) putBucketHandler(w http.ResponseWriter, req *http.Request) {
if isRequestBucketACL(req.URL.Query()) {
server.putBucketACLHandler(w, req)
return
}
acceptsContentType := getContentType(req)
if acceptsContentType == unknownContentType {
writeErrorResponse(w, req, NotAcceptable, acceptsContentType, req.URL.Path)
return
}
// read from 'x-amz-acl'
aclType := getACLType(req)
if aclType == unsupportedACLType {
writeErrorResponse(w, req, NotImplemented, acceptsContentType, req.URL.Path)
return
}
vars := mux.Vars(req)
bucket := vars["bucket"]
err := server.driver.CreateBucket(bucket, getACLTypeString(aclType))
switch iodine.ToError(err).(type) {
case nil:
{
// Make sure to add Location information here only for bucket
w.Header().Set("Location", "/"+bucket)
writeSuccessResponse(w, acceptsContentType)
}
case drivers.TooManyBuckets:
{
writeErrorResponse(w, req, TooManyBuckets, acceptsContentType, req.URL.Path)
}
case drivers.BucketNameInvalid:
{
writeErrorResponse(w, req, InvalidBucketName, acceptsContentType, req.URL.Path)
}
case drivers.BucketExists:
{
writeErrorResponse(w, req, BucketAlreadyExists, acceptsContentType, req.URL.Path)
}
default:
{
log.Error.Println(iodine.New(err, nil))
writeErrorResponse(w, req, InternalError, acceptsContentType, req.URL.Path)
}
}
}
// PUT Bucket ACL
// ----------
// This implementation of the PUT operation modifies the bucketACL for authenticated request
func (server *minioAPI) putBucketACLHandler(w http.ResponseWriter, req *http.Request) {
acceptsContentType := getContentType(req)
if acceptsContentType == unknownContentType {
writeErrorResponse(w, req, NotAcceptable, acceptsContentType, req.URL.Path)
return
}
// read from 'x-amz-acl'
aclType := getACLType(req)
if aclType == unsupportedACLType {
writeErrorResponse(w, req, NotImplemented, acceptsContentType, req.URL.Path)
return
}
vars := mux.Vars(req)
bucket := vars["bucket"]
err := server.driver.SetBucketMetadata(bucket, getACLTypeString(aclType))
switch iodine.ToError(err).(type) {
case nil:
{
writeSuccessResponse(w, acceptsContentType)
}
case drivers.BucketNameInvalid:
{
writeErrorResponse(w, req, InvalidBucketName, acceptsContentType, req.URL.Path)
}
case drivers.BucketNotFound:
{
writeErrorResponse(w, req, NoSuchBucket, acceptsContentType, req.URL.Path)
}
default:
{
log.Error.Println(iodine.New(err, nil))
writeErrorResponse(w, req, InternalError, acceptsContentType, req.URL.Path)
}
}
}
// 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 (server *minioAPI) headBucketHandler(w http.ResponseWriter, req *http.Request) {
acceptsContentType := getContentType(req)
if acceptsContentType == unknownContentType {
writeErrorResponse(w, req, NotAcceptable, acceptsContentType, req.URL.Path)
return
}
// verify if bucket allows this operation
if !server.isValidOp(w, req, acceptsContentType) {
return
}
// Always a success if isValidOp succeeds
writeSuccessResponse(w, acceptsContentType)
}