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
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
#!/usr/bin/env node
// A WebSocket to TCP socket proxy
// Copyright 2012 Joel Martin
// Licensed under LGPL version 3 (see docs/LICENSE.LGPL-3)
// Known to work with node 0.8.9
// Requires node modules: ws, base64, optimist and policyfile
// npm install ws base64 optimist policyfile
//
// NOTE:
// This version requires a patched version of einaros/ws that supports
// subprotocol negotiation. You can use the patched version like this:
//
// cd websockify/other
// git clone https://github.com/kanaka/ws
// npm link ./ws
var argv = require('optimist').argv,
net = require('net'),
http = require('http'),
https = require('https'),
url = require('url'),
path = require('path'),
fs = require('fs'),
policyfile = require('policyfile'),
base64 = require('base64/build/Release/base64'),
Buffer = require('buffer').Buffer,
WebSocketServer = require('ws').Server,
webServer, wsServer,
source_host, source_port, target_host, target_port,
web_path = null;
// Handle new WebSocket client
new_client = function(client) {
var clientAddr = client._socket.remoteAddress, log;
log = function (msg) {
console.log(' ' + clientAddr + ': '+ msg);
};
log('WebSocket connection');
log('Version ' + client.protocolVersion + ', subprotocol: ' + client.protocol);
var target = net.createConnection(target_port,target_host, function() {
log('connected to target');
});
target.on('data', function(data) {
//log("sending message: " + data);
try {
if (client.protocol === 'base64') {
client.send(base64.encode(new Buffer(data)));
} else {
client.send(data,{binary: true});
}
} catch(e) {
log("Client closed, cleaning up target");
target.end();
}
});
target.on('end', function() {
log('target disconnected');
});
client.on('message', function(msg) {
//log('got message: ' + msg);
if (client.protocol === 'base64') {
target.write(base64.decode(msg),'binary');
} else {
target.write(msg,'binary');
}
});
client.on('close', function(code, reason) {
log('WebSocket client disconnected: ' + code + ' [' + reason + ']');
target.end();
});
client.on('error', function(a) {
log('WebSocket client error: ' + a);
target.end();
});
};
// Send an HTTP error response
http_error = function (response, code, msg) {
response.writeHead(code, {"Content-Type": "text/plain"});
response.write(msg + "\n");
response.end();
return;
}
// Process an HTTP static file request
http_request = function (request, response) {
// console.log("pathname: " + url.parse(req.url).pathname);
// res.writeHead(200, {'Content-Type': 'text/plain'});
// res.end('okay');
if (! argv.web) {
return http_error(response, 403, "403 Permission Denied");
}
var uri = url.parse(request.url).pathname
, filename = path.join(argv.web, uri);
fs.exists(filename, function(exists) {
if(!exists) {
return http_error(response, 404, "404 Not Found");
}
if (fs.statSync(filename).isDirectory()) {
filename += '/index.html';
}
fs.readFile(filename, "binary", function(err, file) {
if(err) {
return http_error(response, 500, err);
}
response.writeHead(200);
response.write(file, "binary");
response.end();
});
});
};
// Select 'binary' or 'base64' subprotocol, preferring 'binary'
selectProtocol = function(protocols, callback) {
var plist = protocols ? protocols.split(',') : "";
var plist = protocols.split(',');
if (plist.indexOf('binary') >= 0) {
callback(true, 'binary');
} else if (plist.indexOf('base64') >= 0) {
callback(true, 'base64');
} else {
console.log("Client must support 'binary' or 'base64' protocol");
callback(false);
}
}
// parse source and target arguments into parts
try {
source_arg = argv._[0].toString();
target_arg = argv._[1].toString();
var idx;
idx = source_arg.indexOf(":");
if (idx >= 0) {
source_host = source_arg.slice(0, idx);
source_port = parseInt(source_arg.slice(idx+1), 10);
} else {
source_host = "";
source_port = parseInt(source_arg, 10);
}
idx = target_arg.indexOf(":");
if (idx < 0) {
throw("target must be host:port");
}
target_host = target_arg.slice(0, idx);
target_port = parseInt(target_arg.slice(idx+1), 10);
if (isNaN(source_port) || isNaN(target_port)) {
throw("illegal port");
}
} catch(e) {
console.error("websockify.js [--web web_dir] [--cert cert.pem [--key key.pem]] [source_addr:]source_port target_addr:target_port");
process.exit(2);
}
console.log("WebSocket settings: ");
console.log(" - proxying from " + source_host + ":" + source_port +
" to " + target_host + ":" + target_port);
if (argv.web) {
console.log(" - Web server active. Serving: " + argv.web);
}
if (argv.cert) {
argv.key = argv.key || argv.cert;
var cert = fs.readFileSync(argv.cert),
key = fs.readFileSync(argv.key);
console.log(" - Running in encrypted HTTPS (wss://) mode using: " + argv.cert + ", " + argv.key);
webServer = https.createServer({cert: cert, key: key}, http_request);
} else {
console.log(" - Running in unencrypted HTTP (ws://) mode");
webServer = http.createServer(http_request);
}
webServer.listen(source_port, function() {
wsServer = new WebSocketServer({server: webServer,
handleProtocols: selectProtocol});
wsServer.on('connection', new_client);
});
// Attach Flash policyfile answer service
policyfile.createServer().listen(-1, webServer);
|
