/
wswrapper.go
71 lines (58 loc) · 1.04 KB
/
wswrapper.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
package shell
import (
"io"
"sync"
"unicode/utf8"
"github.com/gorilla/websocket"
)
type WSWrapper struct {
io.ReadWriteCloser
ws *websocket.Conn
mode int
lock sync.RWMutex
}
func NewWSWrapper(ws *websocket.Conn, mode int) *WSWrapper {
if ws == nil {
return nil
}
return &WSWrapper{
ws: ws,
mode: mode,
}
}
func (w *WSWrapper) Write(data []byte) (n int, err error) {
w.lock.Lock()
defer w.lock.Unlock()
n = len(data)
err = w.ws.WriteMessage(w.mode, validUtf8(data))
if err != nil {
n = 0
}
return n, err
}
func validUtf8(b []byte) []byte {
if !utf8.Valid(b) {
s := string(b)
v := make([]rune, 0, len(s))
for i, r := range s {
if r == utf8.RuneError {
_, size := utf8.DecodeRuneInString(s[i:])
if size == 1 {
continue
}
}
v = append(v, r)
}
s = string(v)
return []byte(s)
}
return b
}
func (w *WSWrapper) Read(out []byte) (n int, err error) {
var data []byte
_, data, err = w.ws.ReadMessage()
return copy(out, data), nil
}
func (w *WSWrapper) Close() error {
return w.ws.Close()
}