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minio/handler-utils.go

60 lines
2.0 KiB

/*
* Minio Cloud Storage, (C) 2015, 2016 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 (
"io"
"net/http"
)
// Validates location constraint in PutBucket request body.
// The location value in the request body should match the
// region configured at serverConfig, otherwise error is returned.
func isValidLocationConstraint(r *http.Request) (s3Error APIErrorCode) {
serverRegion := serverConfig.GetRegion()
// If the request has no body with content-length set to 0,
// we do not have to validate location constraint. Bucket will
// be created at default region.
if r.ContentLength == 0 {
return ErrNone
}
locationConstraint := createBucketLocationConfiguration{}
if err := xmlDecoder(r.Body, &locationConstraint, r.ContentLength); err != nil {
if err == io.EOF && r.ContentLength == -1 {
// EOF is a valid condition here when ContentLength is -1.
return ErrNone
}
errorIf(err, "Unable to xml decode location constraint")
// Treat all other failures as XML parsing errors.
return ErrMalformedXML
} // Successfully decoded, proceed to verify the region.
// Once region has been obtained we proceed to verify it.
incomingRegion := locationConstraint.Location
if incomingRegion == "" {
// Location constraint is empty for region "us-east-1",
// in accordance with protocol.
incomingRegion = "us-east-1"
}
// Return errInvalidRegion if location constraint does not match
// with configured region.
s3Error = ErrNone
if serverRegion != incomingRegion {
s3Error = ErrInvalidRegion
}
return s3Error
}