/
zip.go
61 lines (51 loc) · 1.21 KB
/
zip.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
package archivefs
import (
"archive/zip"
"bytes"
"io"
"io/ioutil"
"net/http"
)
var Zip = &fnFormat{
loadFn: decodeZip,
}
func decodeZip(r io.Reader) (http.FileSystem, error) {
// Open the zip archive for reading.
// We have to load it all into memory for this step, because zip needs to
// know how long the reader is.
zipData, err := ioutil.ReadAll(r)
if err != nil {
return nil, err
}
archive, err := zip.NewReader(bytes.NewReader(zipData), int64(len(zipData)))
if err != nil {
return nil, err
}
root := &Dir{
files: map[string]*File{},
}
// Iterate through the files in the archive.
for _, file := range archive.File {
root.files[file.FileHeader.Name] = &File{
FileInfo: file.FileHeader.FileInfo(),
Dir: root,
NewReaderFn: newZipFileReader(file),
}
}
return root, nil
}
func newZipFileReader(zipFile *zip.File) func(*File) (http.File, error) {
return func(file *File) (http.File, error) {
readCloser, err := zipFile.Open()
if err != nil {
return nil, err
}
// Have to add a io.Seeker to readCloser.
readSeekCloser := NewMemoizingReadCloser(readCloser)
return &FileReader{
File: file,
reader: readSeekCloser,
closer: readSeekCloser,
}, nil
}
}