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minio/bucket-handlers.go

492 lines
16 KiB

/*
* 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 (
"encoding/hex"
"io/ioutil"
"net/http"
"github.com/gorilla/mux"
"github.com/minio/minio/pkg/crypto/sha256"
"github.com/minio/minio/pkg/fs"
"github.com/minio/minio/pkg/probe"
v4 "github.com/minio/minio/pkg/signature"
)
// GetBucketLocationHandler - GET Bucket location.
// -------------------------
// This operation returns bucket location.
func (api CloudStorageAPI) GetBucketLocationHandler(w http.ResponseWriter, req *http.Request) {
vars := mux.Vars(req)
bucket := vars["bucket"]
if isRequestRequiresACLCheck(req) {
writeErrorResponse(w, req, AccessDenied, req.URL.Path)
return
}
_, err := api.Filesystem.GetBucketMetadata(bucket)
if err != nil {
errorIf(err.Trace(), "GetBucketMetadata failed.", nil)
switch err.ToGoError().(type) {
case fs.BucketNotFound:
writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
case fs.BucketNameInvalid:
writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
default:
writeErrorResponse(w, req, InternalError, req.URL.Path)
}
return
}
// TODO: Location value for LocationResponse is deliberately not used, until
// we bring in a mechanism of configurable regions. For the time being
// default region is empty i.e 'us-east-1'.
encodedSuccessResponse := encodeSuccessResponse(LocationResponse{}) // generate response
setCommonHeaders(w) // write headers
writeSuccessResponse(w, encodedSuccessResponse)
}
// 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.
//
func (api CloudStorageAPI) ListMultipartUploadsHandler(w http.ResponseWriter, req *http.Request) {
vars := mux.Vars(req)
bucket := vars["bucket"]
if isRequestRequiresACLCheck(req) {
writeErrorResponse(w, req, AccessDenied, req.URL.Path)
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
}
resources, err := api.Filesystem.ListMultipartUploads(bucket, resources)
if err != nil {
errorIf(err.Trace(), "ListMultipartUploads failed.", nil)
switch err.ToGoError().(type) {
case fs.BucketNotFound:
writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
default:
writeErrorResponse(w, req, InternalError, req.URL.Path)
}
return
}
// generate response
response := generateListMultipartUploadsResponse(bucket, resources)
encodedSuccessResponse := encodeSuccessResponse(response)
// write headers.
setCommonHeaders(w)
// write success response.
writeSuccessResponse(w, 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.
//
func (api CloudStorageAPI) ListObjectsHandler(w http.ResponseWriter, req *http.Request) {
vars := mux.Vars(req)
bucket := vars["bucket"]
if isRequestRequiresACLCheck(req) {
if api.Filesystem.IsPrivateBucket(bucket) {
writeErrorResponse(w, req, AccessDenied, req.URL.Path)
return
}
}
// TODO handle encoding type.
prefix, marker, delimiter, maxkeys, _ := getBucketResources(req.URL.Query())
if maxkeys < 0 {
writeErrorResponse(w, req, InvalidMaxKeys, req.URL.Path)
return
}
if maxkeys == 0 {
maxkeys = maxObjectList
}
listResp, err := api.Filesystem.ListObjects(bucket, prefix, marker, delimiter, maxkeys)
if err == nil {
// generate response
response := generateListObjectsResponse(bucket, prefix, marker, delimiter, maxkeys, listResp)
encodedSuccessResponse := encodeSuccessResponse(response)
// Write headers
setCommonHeaders(w)
// Write success response.
writeSuccessResponse(w, encodedSuccessResponse)
return
}
switch err.ToGoError().(type) {
case fs.BucketNameInvalid:
writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
case fs.BucketNotFound:
writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
case fs.ObjectNotFound:
writeErrorResponse(w, req, NoSuchKey, req.URL.Path)
case fs.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.
func (api CloudStorageAPI) ListBucketsHandler(w http.ResponseWriter, req *http.Request) {
if isRequestRequiresACLCheck(req) {
writeErrorResponse(w, req, AccessDenied, req.URL.Path)
return
}
buckets, err := api.Filesystem.ListBuckets()
if err == nil {
// generate response
response := generateListBucketsResponse(buckets)
encodedSuccessResponse := encodeSuccessResponse(response)
// write headers
setCommonHeaders(w)
// write response
writeSuccessResponse(w, encodedSuccessResponse)
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
func (api CloudStorageAPI) PutBucketHandler(w http.ResponseWriter, req *http.Request) {
vars := mux.Vars(req)
bucket := vars["bucket"]
if isRequestRequiresACLCheck(req) {
writeErrorResponse(w, req, AccessDenied, req.URL.Path)
return
}
// read from 'x-amz-acl'
aclType := getACLType(req)
if aclType == unsupportedACLType {
writeErrorResponse(w, req, NotImplemented, req.URL.Path)
return
}
var signature *v4.Signature
// Init signature V4 verification
if isRequestSignatureV4(req) {
var err *probe.Error
signature, err = initSignatureV4(req)
if err != nil {
switch err.ToGoError() {
case errInvalidRegion:
errorIf(err.Trace(), "Unknown region in authorization header.", nil)
writeErrorResponse(w, req, AuthorizationHeaderMalformed, req.URL.Path)
return
case errAccessKeyIDInvalid:
errorIf(err.Trace(), "Invalid access key id.", nil)
writeErrorResponse(w, req, InvalidAccessKeyID, req.URL.Path)
return
default:
errorIf(err.Trace(), "Initializing signature v4 failed.", nil)
writeErrorResponse(w, req, InternalError, req.URL.Path)
return
}
}
}
// if body of request is non-nil then check for validity of Content-Length
if req.Body != nil {
/// if Content-Length is unknown/missing, deny the request
if req.ContentLength == -1 && !contains(req.TransferEncoding, "chunked") {
writeErrorResponse(w, req, MissingContentLength, req.URL.Path)
return
}
if signature != nil {
locationBytes, e := ioutil.ReadAll(req.Body)
if e != nil {
errorIf(probe.NewError(e), "MakeBucket failed.", nil)
writeErrorResponse(w, req, InternalError, req.URL.Path)
return
}
sh := sha256.New()
sh.Write(locationBytes)
ok, err := signature.DoesSignatureMatch(hex.EncodeToString(sh.Sum(nil)))
if err != nil {
errorIf(err.Trace(), "MakeBucket failed.", nil)
writeErrorResponse(w, req, InternalError, req.URL.Path)
return
}
if !ok {
writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
return
}
}
}
err := api.Filesystem.MakeBucket(bucket, getACLTypeString(aclType))
if err != nil {
errorIf(err.Trace(), "MakeBucket failed.", nil)
switch err.ToGoError().(type) {
case fs.BucketNameInvalid:
writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
case fs.BucketExists:
writeErrorResponse(w, req, BucketAlreadyExists, req.URL.Path)
default:
writeErrorResponse(w, req, InternalError, req.URL.Path)
}
return
}
// Make sure to add Location information here only for bucket
w.Header().Set("Location", "/"+bucket)
writeSuccessResponse(w, nil)
}
// PostPolicyBucketHandler - POST policy
// ----------
// This implementation of the POST operation handles object creation with a specified
// signature policy in multipart/form-data
func (api CloudStorageAPI) PostPolicyBucketHandler(w http.ResponseWriter, req *http.Request) {
// if body of request is non-nil then check for validity of Content-Length
if req.Body != nil {
/// if Content-Length is unknown/missing, deny the request
if req.ContentLength == -1 {
writeErrorResponse(w, req, MissingContentLength, req.URL.Path)
return
}
}
// Here the parameter is the size of the form data that should
// be loaded in memory, the remaining being put in temporary
// files
reader, e := req.MultipartReader()
if e != nil {
errorIf(probe.NewError(e), "Unable to initialize multipart reader.", nil)
writeErrorResponse(w, req, MalformedPOSTRequest, req.URL.Path)
return
}
fileBody, formValues, err := extractHTTPFormValues(reader)
if err != nil {
errorIf(err.Trace(), "Unable to parse form values.", nil)
writeErrorResponse(w, req, MalformedPOSTRequest, req.URL.Path)
return
}
bucket := mux.Vars(req)["bucket"]
formValues["Bucket"] = bucket
object := formValues["Key"]
signature, err := initPostPresignedPolicyV4(formValues)
if err != nil {
errorIf(err.Trace(), "Unable to initialize post policy presigned.", nil)
writeErrorResponse(w, req, MalformedPOSTRequest, req.URL.Path)
return
}
var ok bool
if ok, err = signature.DoesPolicySignatureMatch(formValues["X-Amz-Date"]); err != nil {
errorIf(err.Trace(), "Unable to verify signature.", nil)
writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
return
}
if ok == false {
writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
return
}
if err = applyPolicy(formValues); err != nil {
errorIf(err.Trace(), "Invalid request, policy doesn't match with the endpoint.", nil)
writeErrorResponse(w, req, MalformedPOSTRequest, req.URL.Path)
return
}
metadata, err := api.Filesystem.CreateObject(bucket, object, "", 0, fileBody, nil)
if err != nil {
errorIf(err.Trace(), "CreateObject failed.", nil)
switch err.ToGoError().(type) {
case fs.RootPathFull:
writeErrorResponse(w, req, RootPathFull, req.URL.Path)
case fs.BucketNotFound:
writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
case fs.BucketNameInvalid:
writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
case fs.BadDigest:
writeErrorResponse(w, req, BadDigest, req.URL.Path)
case v4.SigDoesNotMatch:
writeErrorResponse(w, req, SignatureDoesNotMatch, req.URL.Path)
case fs.IncompleteBody:
writeErrorResponse(w, req, IncompleteBody, req.URL.Path)
case fs.EntityTooLarge:
writeErrorResponse(w, req, EntityTooLarge, req.URL.Path)
case fs.InvalidDigest:
writeErrorResponse(w, req, InvalidDigest, req.URL.Path)
default:
writeErrorResponse(w, req, InternalError, req.URL.Path)
}
return
}
if metadata.MD5 != "" {
w.Header().Set("ETag", "\""+metadata.MD5+"\"")
}
writeSuccessResponse(w, nil)
}
// PutBucketACLHandler - PUT Bucket ACL
// ----------
// This implementation of the PUT operation modifies the bucketACL for authenticated request
func (api CloudStorageAPI) PutBucketACLHandler(w http.ResponseWriter, req *http.Request) {
vars := mux.Vars(req)
bucket := vars["bucket"]
if isRequestRequiresACLCheck(req) {
writeErrorResponse(w, req, AccessDenied, req.URL.Path)
return
}
// read from 'x-amz-acl'
aclType := getACLType(req)
if aclType == unsupportedACLType {
writeErrorResponse(w, req, NotImplemented, req.URL.Path)
return
}
err := api.Filesystem.SetBucketMetadata(bucket, map[string]string{"acl": getACLTypeString(aclType)})
if err != nil {
errorIf(err.Trace(), "PutBucketACL failed.", nil)
switch err.ToGoError().(type) {
case fs.BucketNameInvalid:
writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
case fs.BucketNotFound:
writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
default:
writeErrorResponse(w, req, InternalError, req.URL.Path)
}
return
}
writeSuccessResponse(w, nil)
}
// GetBucketACLHandler - GET ACL on a Bucket
// ----------
// This operation uses acl subresource to the return the ``acl``
// of a bucket. One must have permission to access the bucket to
// know its ``acl``. This operation willl return response of 404
// if bucket not found and 403 for invalid credentials.
func (api CloudStorageAPI) GetBucketACLHandler(w http.ResponseWriter, req *http.Request) {
vars := mux.Vars(req)
bucket := vars["bucket"]
if isRequestRequiresACLCheck(req) {
writeErrorResponse(w, req, AccessDenied, req.URL.Path)
return
}
bucketMetadata, err := api.Filesystem.GetBucketMetadata(bucket)
if err != nil {
errorIf(err.Trace(), "GetBucketMetadata failed.", nil)
switch err.ToGoError().(type) {
case fs.BucketNotFound:
writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
case fs.BucketNameInvalid:
writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
default:
writeErrorResponse(w, req, InternalError, req.URL.Path)
}
return
}
// Generate response
response := generateAccessControlPolicyResponse(bucketMetadata.ACL)
encodedSuccessResponse := encodeSuccessResponse(response)
// Write headers
setCommonHeaders(w)
// Write success response.
writeSuccessResponse(w, encodedSuccessResponse)
}
// 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.
func (api CloudStorageAPI) HeadBucketHandler(w http.ResponseWriter, req *http.Request) {
vars := mux.Vars(req)
bucket := vars["bucket"]
if isRequestRequiresACLCheck(req) {
if api.Filesystem.IsPrivateBucket(bucket) {
writeErrorResponse(w, req, AccessDenied, req.URL.Path)
return
}
}
_, err := api.Filesystem.GetBucketMetadata(bucket)
if err != nil {
errorIf(err.Trace(), "GetBucketMetadata failed.", nil)
switch err.ToGoError().(type) {
case fs.BucketNotFound:
writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
case fs.BucketNameInvalid:
writeErrorResponse(w, req, InvalidBucketName, req.URL.Path)
default:
writeErrorResponse(w, req, InternalError, req.URL.Path)
}
return
}
writeSuccessResponse(w, nil)
}
// DeleteBucketHandler - Delete bucket
func (api CloudStorageAPI) DeleteBucketHandler(w http.ResponseWriter, req *http.Request) {
vars := mux.Vars(req)
bucket := vars["bucket"]
if isRequestRequiresACLCheck(req) {
writeErrorResponse(w, req, AccessDenied, req.URL.Path)
return
}
err := api.Filesystem.DeleteBucket(bucket)
if err != nil {
errorIf(err.Trace(), "DeleteBucket failed.", nil)
switch err.ToGoError().(type) {
case fs.BucketNotFound:
writeErrorResponse(w, req, NoSuchBucket, req.URL.Path)
case fs.BucketNotEmpty:
writeErrorResponse(w, req, BucketNotEmpty, req.URL.Path)
default:
writeErrorResponse(w, req, InternalError, req.URL.Path)
}
return
}
writeSuccessNoContent(w)
}