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
106
107
108
109
110
111
|
/**
* This program enables you to connect to sshd server and forward the docker socket. You will be
* asked username, hostname and passwd. If everything works fine, you will get the response code to
* the _ping endpoint of the dockerd.
*/
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.UIKeyboardInteractive;
import com.jcraft.jsch.UserInfo;
import java.net.HttpURLConnection;
import java.net.URL;
import javax.swing.JOptionPane;
public class SocketForwardingL {
public static void main(String[] arg) {
try {
JSch jsch = new JSch();
String host = null;
if (arg.length > 0) {
host = arg[0];
} else {
host = JOptionPane.showInputDialog("Enter username@hostname",
System.getProperty("user.name") + "@localhost");
}
String user = host.substring(0, host.indexOf('@'));
host = host.substring(host.indexOf('@') + 1);
Session session = jsch.getSession(user, host, 22);
String passwd = JOptionPane.showInputDialog("Enter password");
session.setPassword(passwd);
UserInfo ui = new MyUserInfo() {
@Override
public void showMessage(String message) {
JOptionPane.showMessageDialog(null, message);
}
@Override
public boolean promptYesNo(String message) {
Object[] options = {"yes", "no"};
int foo = JOptionPane.showOptionDialog(null, message, "Warning",
JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE, null, options, options[0]);
return foo == 0;
}
// If password is not given before the invocation of Session#connect(),
// implement also following methods,
// * UserInfo#getPassword(),
// * UserInfo#promptPassword(String message) and
// * UIKeyboardInteractive#promptKeyboardInteractive()
};
session.setUserInfo(ui);
// It must not be recommended, but if you want to skip host-key check,
// invoke following,
// session.setConfig("StrictHostKeyChecking", "no");
// session.connect();
session.connect(30000); // making a connection with timeout.
final int boundPort =
session.setSocketForwardingL(null, 0, "/var/run/docker.sock", null, 1000);
URL myURL = new URL("http://localhost:" + boundPort + "/_ping");
HttpURLConnection myURLConnection = (HttpURLConnection) myURL.openConnection();
System.out.println(
"Docker Ping http response code (" + myURL + "): " + myURLConnection.getResponseCode());
session.disconnect();
HttpURLConnection myURLConnection2 = (HttpURLConnection) myURL.openConnection();
System.out.println("Docker Ping http response code: " + myURLConnection2.getResponseCode());
} catch (Exception e) {
System.out.println(e);
}
}
public abstract static class MyUserInfo implements UserInfo, UIKeyboardInteractive {
@Override
public String getPassword() {
return null;
}
@Override
public String getPassphrase() {
return null;
}
@Override
public boolean promptPassphrase(String message) {
return false;
}
@Override
public boolean promptPassword(String message) {
return false;
}
@Override
public String[] promptKeyboardInteractive(String destination, String name, String instruction,
String[] prompt, boolean[] echo) {
return null;
}
}
}
|
