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minio/cmd/copy-part-range.go

71 lines
2.4 KiB

/*
* 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 (
"context"
"net/http"
"net/url"
)
// Writes S3 compatible copy part range error.
func writeCopyPartErr(ctx context.Context, w http.ResponseWriter, err error, url *url.URL, browser bool) {
switch err {
case errInvalidRange:
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidCopyPartRange), url, browser)
return
case errInvalidRangeSource:
writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidCopyPartRangeSource), url, browser)
return
default:
apiErr := errorCodes.ToAPIErr(ErrInvalidCopyPartRangeSource)
apiErr.Description = err.Error()
writeErrorResponse(ctx, w, apiErr, url, browser)
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.
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
}