This repository has been archived by the owner on Feb 27, 2020. It is now read-only.
/
vncviewer.go
101 lines (87 loc) · 2.03 KB
/
vncviewer.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
package qemurun
import (
"fmt"
"io"
"net"
"os"
"os/exec"
"path/filepath"
"github.com/fsnotify/fsnotify"
"github.com/pkg/errors"
)
// ExposeVNC will forward requests on given port to given socket until done is
// closed.
func ExposeVNC(socket string, port int, done <-chan struct{}) {
// Wait for VNC socket to available
waitForSocket(socket, done)
// Create a TCP listener
listener, err := net.Listen("tcp", fmt.Sprintf(":%d", port))
if err != nil {
panic(fmt.Sprintf("Failed to listen on PORT %d, error: %s", port, err))
}
// Proxy vnc connections to the unix domain socket
go func() {
for {
conn, err := listener.Accept()
if err != nil {
break
}
c, err := net.Dial("unix", socket)
if err != nil {
conn.Close()
} else {
connect(conn, c)
}
}
}()
// When we're told we're done we close the listener
<-done
listener.Close()
}
func waitForSocket(socket string, done <-chan struct{}) {
w, err := fsnotify.NewWatcher()
if err != nil {
panic(errors.Wrap(err, "Failed to setup file system monitoring"))
}
defer w.Close()
if err = w.Add(filepath.Dir(socket)); err != nil {
panic(errors.Wrap(err, "Failed to monitor socket folder"))
}
for {
if _, err := os.Stat(socket); err == nil || !os.IsNotExist(err) {
return
}
select {
case <-w.Events:
case <-done:
return
}
}
}
// StartVNCViewer will start a "vncviewer" and connect it to "socket".
// Stopping when done is closed.
func StartVNCViewer(socket string, done <-chan struct{}) {
waitForSocket(socket, done)
go ExposeVNC(socket, 59007, done)
// Launch vinagre
cmd := exec.Command("vinagre", "localhost:59007")
if err := cmd.Start(); err != nil {
fmt.Println("Failed to start 'vinagre', error: ", err)
}
// When we're told we're done we close the listener and kill vinagre
<-done
cmd.Process.Kill()
}
func connect(c1, c2 net.Conn) {
// Connect the two connetions and make sure we always close
go func() {
io.Copy(c1, c2)
c1.Close()
c2.Close()
}()
go func() {
io.Copy(c2, c1)
c1.Close()
c2.Close()
}()
}