97 lines
3 KiB
Go
97 lines
3 KiB
Go
/*
|
|
* Minio Cloud Storage, (C) 2017 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 cmd
|
|
|
|
import (
|
|
"net/http"
|
|
"net/url"
|
|
)
|
|
|
|
// Writes S3 compatible copy part range error.
|
|
func writeCopyPartErr(w http.ResponseWriter, err error, url *url.URL) {
|
|
switch err {
|
|
case errInvalidRange:
|
|
writeErrorResponse(w, ErrInvalidCopyPartRange, url)
|
|
return
|
|
case errInvalidRangeSource:
|
|
writeErrorResponse(w, ErrInvalidCopyPartRangeSource, url)
|
|
return
|
|
default:
|
|
writeErrorResponse(w, ErrInternalError, url)
|
|
return
|
|
}
|
|
}
|
|
|
|
// Parses x-amz-copy-source-range for CopyObjectPart API. Its behavior
|
|
// is different from regular HTTP range header. It only supports the
|
|
// form `bytes=first-last` where first and last are zero-based byte
|
|
// offsets. See
|
|
// http://docs.aws.amazon.com/AmazonS3/latest/API/mpUploadUploadPartCopy.html
|
|
// for full details. This function treats an empty rangeString as
|
|
// referring to the whole resource.
|
|
//
|
|
// In addition to parsing the range string, it also validates the
|
|
// specified range against the given object size, so that Copy API
|
|
// specific error can be returned.
|
|
func parseCopyPartRange(rangeString string, resourceSize int64) (offset, length int64, err error) {
|
|
var hrange *HTTPRangeSpec
|
|
if rangeString != "" {
|
|
hrange, err = parseRequestRangeSpec(rangeString)
|
|
if err != nil {
|
|
return -1, -1, err
|
|
}
|
|
|
|
// Require that both start and end are specified.
|
|
if hrange.IsSuffixLength || hrange.Start == -1 || hrange.End == -1 {
|
|
return -1, -1, errInvalidRange
|
|
}
|
|
|
|
// Validate specified range against object size.
|
|
if hrange.Start >= resourceSize || hrange.End >= resourceSize {
|
|
return -1, -1, errInvalidRangeSource
|
|
}
|
|
}
|
|
|
|
return hrange.GetOffsetLength(resourceSize)
|
|
}
|
|
|
|
// parseCopyPartRangeSpec transforms a range string (e.g. bytes=3-4) to HTTPRangeSpec
|
|
// and returns errors if weird values
|
|
func parseCopyPartRangeSpec(rangeString string) (hrange *HTTPRangeSpec, err error) {
|
|
hrange, err = parseRequestRangeSpec(rangeString)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if hrange.IsSuffixLength || hrange.Start < 0 || hrange.End < 0 {
|
|
return nil, errInvalidRange
|
|
}
|
|
return hrange, nil
|
|
}
|
|
|
|
// checkCopyPartRangeWithSize adds more check to the range string in case of
|
|
// copy object part. This API requires having specific start and end range values
|
|
// e.g. 'bytes=3-10'. Other use cases will be rejected.
|
|
func checkCopyPartRangeWithSize(rs *HTTPRangeSpec, resourceSize int64) (err error) {
|
|
if rs == nil {
|
|
return nil
|
|
}
|
|
if rs.IsSuffixLength || rs.Start >= resourceSize || rs.End >= resourceSize {
|
|
return errInvalidRangeSource
|
|
}
|
|
return nil
|
|
}
|