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POwebsocket handshake problem
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  1. POwebsocket handshake problem
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    copied!<p>I'm using python to implement a simple websocket server. The handshake I'm using comes from <a href="http://en.wikipedia.org/w/index.php?title=WebSockets&amp;oldid=372387414" rel="noreferrer">http://en.wikipedia.org/w/index.php?title=WebSockets&amp;oldid=372387414</a>.</p> <p>The handshake itself seems to work, but when I hit send, I get a javascript error:</p> <blockquote> <p>Uncaught Error: INVALID_STATE_ERR: DOM Exception 11</p> </blockquote> <p>Here's the html:</p> <pre><code>&lt;!doctype html&gt; &lt;html&gt; &lt;head&gt; &lt;title&gt;ws_json&lt;/title&gt; &lt;/head&gt; &lt;body onload="handleLoad();" onunload="handleUnload();"&gt; &lt;input type="text" id='input' /&gt; &lt;input type="button" value="submit" onclick="handleSubmit()" /&gt; &lt;div id="display"&gt;&lt;/div&gt; &lt;script type="text/javascript"&gt; function showmsg(str){ display = document.getElementById("display"); display.innerHTML += "&lt;p&gt;" + str + "&lt;/p&gt;"; } function send(str){ ws.send(str.length); ws.send(str); } function handleSubmit(){ input = document.getElementById('input'); send(input.value); input.focus(); input.value = ''; } function handleLoad(){ ws = new WebSocket("ws://localhost:8888/"); ws.onopen = function(){ showmsg("websocket opened."); } ws.onclose = function(){ showmsg("websocket closed."); } } function handleUnload(){ ws.close(); } &lt;/script&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>And here's the python code:</p> <pre><code>import socket import threading import json PORT = 8888 LOCATION = "localhost:8888" def handler(s): print " in handler " ip, _ = s.getpeername() print "New connection from %s" % ip request = s.recv(1024) print "\n%s\n" % request print s.getpeername() # send response response = "HTTP/1.1 101 Web Socket Protocol Handshake\r\n" response += "Upgrade: WebSocket\r\n" response += "Connection: Upgrade\r\n" try: peername = s.getpeername() response += "Sec-WebSocket-Origin: http://%s\r\n" % peername[0] # % request[request.index("Origin: ")+8:-4] except ValueError: print "Bad Request" raise socket.error response += "Sec-WebSocket-Location: ws://%s\r\n" % LOCATION response += "Sec-WebSocket-Protocol: sample" response = response.strip() + "\r\n\r\n" print response s.send(response) while True: length = s.recv(1) print length if not length: break length = int(length) print "Length: %i" % length data = s.recv(length) print "Received: %s" % data print "" s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) s.bind(('localhost', PORT)) s.listen(5) print "server is running..." while True: sock, addr = s.accept() threading.Thread(target=handler, args=(sock, )).start() </code></pre> <p>Does anyone know what I'm doing wrong here?</p>
 

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