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gitea/vendor/github.com/unknwon/cae/zip/stream.go

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2016-11-03 23:16:01 +01:00
// Copyright 2014 Unknown
//
// 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 zip
import (
"archive/zip"
"io"
"os"
"path/filepath"
)
// A StreamArchive represents a streamable archive.
type StreamArchive struct {
*zip.Writer
}
// NewStreamArachive returns a new streamable archive with given io.Writer.
// It's caller's responsibility to close io.Writer and streamer after operation.
func NewStreamArachive(w io.Writer) *StreamArchive {
return &StreamArchive{zip.NewWriter(w)}
}
// StreamFile streams a file or directory entry into StreamArchive.
func (s *StreamArchive) StreamFile(relPath string, fi os.FileInfo, data []byte) error {
if fi.IsDir() {
fh, err := zip.FileInfoHeader(fi)
if err != nil {
return err
}
fh.Name = relPath + "/"
if _, err = s.Writer.CreateHeader(fh); err != nil {
return err
}
} else {
fh, err := zip.FileInfoHeader(fi)
if err != nil {
return err
}
fh.Name = filepath.Join(relPath, fi.Name())
fh.Method = zip.Deflate
fw, err := s.Writer.CreateHeader(fh)
if err != nil {
return err
} else if _, err = fw.Write(data); err != nil {
return err
}
}
return nil
}
// StreamReader streams data from io.Reader to StreamArchive.
func (s *StreamArchive) StreamReader(relPath string, fi os.FileInfo, r io.Reader) (err error) {
fh, err := zip.FileInfoHeader(fi)
if err != nil {
return err
}
fh.Name = filepath.Join(relPath, fi.Name())
fw, err := s.Writer.CreateHeader(fh)
if err != nil {
return err
}
_, err = io.Copy(fw, r)
return err
}