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
package storage
import (	"fmt"	"io"	"net/url"	"sync"	"time"
	"github.com/ije/gox/utils")
type FileSystem interface {	Stat(path string) (stat FileStat, err error)	OpenFile(path string) (content io.ReadSeekCloser, err error)	WriteFile(path string, r io.Reader) (written int64, err error)}
type FileStat interface {	Size() int64	ModTime() time.Time}
type FileSystemDriver interface {	Open(root string, options url.Values) (conn FileSystem, err error)}
var fsDrivers = sync.Map{}
func OpenFS(fsUrl string) (FileSystem, error) {	name, addr := utils.SplitByFirstByte(fsUrl, ':')	fs, ok := fsDrivers.Load(name)	if ok {		root, options, err := parseConfigUrl(addr)		if err == nil {			return fs.(FileSystemDriver).Open(root, options)		}	}	return nil, fmt.Errorf("unregistered fs '%s'", name)}
func RegisterFileSystem(name string, driver FileSystemDriver) error {	_, ok := fsDrivers.Load(name)	if ok {		return fmt.Errorf("fs driver '%s' has been registered", name)	}
	fsDrivers.Store(name, driver)	return nil}