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
|
package imagestore
import (
"bufio"
"io"
"os"
"path"
)
type LocalImageStore struct {
storeRoot string
namePathMapper *NamePathMapper
}
func NewLocalImageStore(root string, mapper *NamePathMapper) *LocalImageStore {
return &LocalImageStore{
storeRoot: root,
namePathMapper: mapper,
}
}
func (this *LocalImageStore) Exists(obj *StoreObject) (bool, error) {
if _, err := os.Stat(this.toPath(obj)); os.IsNotExist(err) {
return false, err
}
return true, nil
}
func (this *LocalImageStore) Save(src string, obj *StoreObject, responseUrl string) (*StoreObject, error) {
// open input file
fi, err := os.Open(src)
if err != nil {
return nil, err
}
defer fi.Close()
// make a read buffer
r := bufio.NewReader(fi)
// open output file
this.createParent(obj)
fo, err := os.Create(this.toPath(obj))
if err != nil {
return nil, err
}
defer fo.Close()
// make a write buffer
w := bufio.NewWriter(fo)
// make a buffer to keep chunks that are read
buf := make([]byte, 1024)
for {
// read a chunk
n, err := r.Read(buf)
if err != nil && err != io.EOF {
return nil, err
}
if n == 0 {
break
}
// write a chunk
if _, err := w.Write(buf[:n]); err != nil {
return nil, err
}
}
if err = w.Flush(); err != nil {
return nil, err
}
obj.Url = this.toPath(obj)
obj.Url = stripPath(obj.Url, responseUrl)
return obj, nil
}
func (this *LocalImageStore) createParent(obj *StoreObject) {
path := path.Dir(this.toPath(obj))
if _, err := os.Stat(path); os.IsNotExist(err) {
os.MkdirAll(path, 0777)
}
}
func (this *LocalImageStore) toPath(obj *StoreObject) string {
return this.storeRoot + "/" + this.namePathMapper.mapToPath(obj)
}
|
