Web Socket to TCP socket proxy and HTML interface.
- wsproxy.py: creates a web sockets to TCP socket proxy. - interact.html: prints received Web Sockets data and has text box to send strings.
This commit is contained in:
Joel Martin
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feb4e5f801
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3292c4a995
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<!DOCTYPE html>
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>Web Sockets echo test</title>
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<meta charset="UTF-8">
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<script src="mootools.js"></script>
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<script src="mootools-more.js"></script>
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<script>
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var cnt = 0;
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var s = null; var timer = null;
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function debug(str) {
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cell = $('debug');
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cell.innerHTML += str + "<br/>";
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}
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function send_data() {
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var entry = $('entry');
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debug(">> send: " + entry.value);
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s.send(entry.value + "\n");
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entry.value = ""; // Clear it
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return true;
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}
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window.onload = function() {
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debug(">> window.onload");
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var uri = new URI(window.location);
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var host = uri.getData("host");
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var port = uri.getData("port");
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if ((!host) || (!port)) {
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debug("must set host and port");
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return;
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}
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var location = "ws://" + host + ":" + port
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debug("connecting to " + location);
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s = new WebSocket(location);
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s.onmessage = function(e) {
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debug(">> onmessage");
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var out = $("out");
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out.innerHTML = out.innerHTML + e.data;
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};
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s.onopen = function(e) {
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debug(">> onopen");
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};
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s.onclose = function(e) {
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debug(">> onclose");
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if (timer) {
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timer = $clear(timer);
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}
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debug("<< onclose");
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}
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debug("<< window.onload");
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};
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</script>
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</head>
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<body>
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<h1>Web Sockets Interactive</h1>
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<fieldset>
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<h3>Server output:</h3>
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<pre>
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<div id="out"></div>
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</pre>
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</fieldset>
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<p>Enter something in the entry below to send to the server.</p>
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<fieldset>
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<p>Enter: <input id="entry" onkeypress="{if (event.keyCode==13) send_data()}" size="42"></p>
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<!-- <p>Enter: <input id="entry" onchange="send_data()" onkeypress="{if (event.keyCode==13) send_data()}" size="42"></p> -->
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</fieldset>
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<br><br>
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Debug:
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<div id="debug" style="width:600px;height:300px"></div>
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</body>
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@ -0,0 +1,91 @@
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#!/usr/bin/python
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import sys, os, socket, time
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from select import select
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server_handshake = """HTTP/1.1 101 Web Socket Protocol Handshake\r
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Upgrade: WebSocket\r
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Connection: Upgrade\r
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WebSocket-Origin: %s\r
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WebSocket-Location: ws://%s%s\r
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WebSocket-Protocol: sample\r
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\r
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"""
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cqueue = []
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tqueue = []
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def start_proxy(listen_port, target_host, target_port):
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lsock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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lsock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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lsock.bind(('', listen_port))
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lsock.listen(100)
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while True:
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try:
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print 'listening on port %s' % listen_port
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csock, address = lsock.accept()
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print 'Got client connection'
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handshake(csock)
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print "Handshake complete"
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print "Connecting to: %s:%s" % (target_host, target_port)
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tsock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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tsock.connect((target_host, target_port))
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socks = [csock, tsock]
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while True:
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ins, outs, excepts = select(socks, socks, socks, 1)
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if excepts: raise Exception("Socket exception")
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if csock in ins:
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buf = csock.recv(1024)
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if len(buf) == 0:
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csock.close()
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tsock.close()
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raise Exception("Client closed")
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tqueue.append(buf[1:-1])
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print "Client recv: %s (%d)" % (buf[1:-1], len(buf))
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if tsock in ins:
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buf = tsock.recv(1024)
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if len(buf) == 0:
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csock.close()
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tsock.close()
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raise Exception("Target closed")
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cqueue.append(buf)
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print "Target recv: %s (%d)" % (buf[1:-1], len(buf))
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if cqueue and csock in outs:
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while cqueue:
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print "Client send: %s" % "\x00" + cqueue[0] + "\xff"
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csock.send("\x00" + cqueue.pop(0) + "\xff")
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if tqueue and tsock in outs:
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while tqueue:
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print "Target send: %s" % tqueue[0]
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tsock.send(tqueue.pop(0))
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except Exception, e:
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csock = tsock = None
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print "Ignoring exception:", e
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def handshake(client):
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handshake = client.recv(255)
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req_lines = handshake.split("\r\n")
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_, path, _ = req_lines[0].split(" ")
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_, origin = req_lines[4].split(" ")
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_, host = req_lines[3].split(" ")
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#print "*** got handshake:\n%s" % handshake
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print "*** client origin: %s, location: ws://%s%s" % (origin, host, path)
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client.send(server_handshake % (origin, host, path))
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if __name__ == '__main__':
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try:
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if len(sys.argv) != 4: raise
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listen_port = int(sys.argv[1])
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target_host = sys.argv[2]
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target_port = int(sys.argv[3])
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except:
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print "Usage: <listen_port> <target_host> <target_port>"
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sys.exit(1)
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start_proxy(listen_port, target_host, target_port)
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