forked from WasabiAiR/stow
-
Notifications
You must be signed in to change notification settings - Fork 1
/
location.go
105 lines (87 loc) · 2.43 KB
/
location.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
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
package b2
import (
"errors"
"net/url"
"strings"
"gomodules.xyz/stow"
"gopkg.in/kothar/go-backblaze.v0"
)
type location struct {
config stow.Config
client *backblaze.B2
}
// Close closes the interface. It's a Noop for this B2 implementation
func (l *location) Close() error {
return nil // nothing to close
}
// CreateContainer creates a new container (bucket)
func (l *location) CreateContainer(name string) (stow.Container, error) {
bucket, err := l.client.CreateBucket(name, backblaze.AllPrivate)
if err != nil {
return nil, err
}
return &container{
bucket: bucket,
}, nil
}
// Containers lists all containers in the location
func (l *location) Containers(prefix string, cursor string, count int) ([]stow.Container, string, error) {
response, err := l.client.ListBuckets()
if err != nil {
return nil, "", err
}
containers := make([]stow.Container, 0, len(response))
for _, cont := range response {
// api and/or library don't seem to support prefixes, so do it ourself
if strings.HasPrefix(cont.Name, prefix) {
containers = append(containers, &container{
bucket: cont,
})
}
}
return containers, "", nil
}
// Container returns a stow.Contaner given a container id. In this case, the 'id'
// is really the bucket name
func (l *location) Container(id string) (stow.Container, error) {
bucket, err := l.client.Bucket(id)
if err != nil || bucket == nil {
return nil, stow.ErrNotFound
}
return &container{
bucket: bucket,
}, nil
}
// ItemByURL returns a stow.Item given a b2 stow url
func (l *location) ItemByURL(u *url.URL) (stow.Item, error) {
if u.Scheme != Kind {
return nil, errors.New("not valid b2 URL")
}
// b2://f001.backblaze.com/file/<container_name>/<path_to_object>
pieces := strings.SplitN(u.Path, "/", 4)
c, err := l.Container(pieces[2])
if err != nil {
return nil, err
}
filename, err := url.QueryUnescape(pieces[3])
if err != nil {
return nil, err
}
response, err := c.(*container).bucket.ListFileNames(filename, 1)
if err != nil {
return nil, stow.ErrNotFound
}
if len(response.Files) != 1 {
return nil, errors.New("unexpected number of responses from ListFileNames")
}
return c.Item(response.Files[0].ID)
}
// RemoveContainer removes the specified bucket. In this case, the 'id'
// is really the bucket name
func (l *location) RemoveContainer(id string) error {
stowCont, err := l.Container(id)
if err != nil {
return err
}
return stowCont.(*container).bucket.Delete()
}