blob: 08b4eb377e7ae62138479aa904f3fd60fac8582a (
plain)
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
|
package copy
import (
"encoding/base64"
"encoding/json"
"net/http"
"os"
"strings"
"time"
"github.com/pkg/errors"
)
// XDockerContainerPathStatHeader is the *key* in http headers pointing to the
// base64 encoded JSON payload of stating a path in a container.
const XDockerContainerPathStatHeader = "X-Docker-Container-Path-Stat"
// FileInfo describes a file or directory and is returned by
// (*CopyItem).Stat().
type FileInfo struct {
Name string `json:"name"`
Size int64 `json:"size"`
Mode os.FileMode `json:"mode"`
ModTime time.Time `json:"mtime"`
IsDir bool `json:"isDir"`
IsStream bool `json:"isStream"`
LinkTarget string `json:"linkTarget"`
}
// EncodeFileInfo serializes the specified FileInfo as a base64 encoded JSON
// payload. Intended for Docker compat.
func EncodeFileInfo(info *FileInfo) (string, error) {
buf, err := json.Marshal(&info)
if err != nil {
return "", errors.Wrap(err, "failed to serialize file stats")
}
return base64.URLEncoding.EncodeToString(buf), nil
}
// ExtractFileInfoFromHeader extracts a base64 encoded JSON payload of a
// FileInfo in the http header. If no such header entry is found, nil is
// returned. Intended for Docker compat.
func ExtractFileInfoFromHeader(header *http.Header) (*FileInfo, error) {
rawData := header.Get(XDockerContainerPathStatHeader)
if len(rawData) == 0 {
return nil, nil
}
info := FileInfo{}
base64Decoder := base64.NewDecoder(base64.URLEncoding, strings.NewReader(rawData))
if err := json.NewDecoder(base64Decoder).Decode(&info); err != nil {
return nil, err
}
return &info, nil
}
|
