initial commit

2014-06-26 10:45:59 +02:00 · 2014-06-26 10:45:59 +02:00 · 1ddb93c9c1
commit 1ddb93c9c1
2 changed files with 91 additions and 0 deletions
--- a/index.html
+++ b/index.html
@ -0,0 +1,17 @@
+<html>
+<head>
+<script>
+var ws = new WebSocket("wss://localhost:80/");
+ws.onopen = function() {
+    function schedule(i) {
+        setTimeout(function() { 
+          ws.send('Hello from the client! (iteration ' + i + ')');
+          schedule(i + 1);
+        }, 1000);            
+    };
+    schedule(1);            
+};
+</script>
+</head>
+<body>
+</body>
--- a/websocketserver.py
+++ b/websocketserver.py
@ -0,0 +1,74 @@
+import struct
+import SocketServer
+from base64 import b64encode
+from hashlib import sha1
+from mimetools import Message
+from StringIO import StringIO
+import ssl
+
+class WebSocketsHandler(SocketServer.StreamRequestHandler):
+    magic = '258EAFA5-E914-47DA-95CA-C5AB0DC85B11'
+
+    def setup(self):
+        SocketServer.StreamRequestHandler.setup(self)
+        print "connection established", self.client_address
+        self.handshake_done = False
+
+    def handle(self):
+        while True:
+            if not self.handshake_done:
+                self.handshake()
+            else:
+                self.read_next_message()
+
+    def read_next_message(self):
+        length = ord(self.rfile.read(2)[1]) & 127
+        if length == 126:
+            length = struct.unpack(">H", self.rfile.read(2))[0]
+        elif length == 127:
+            length = struct.unpack(">Q", self.rfile.read(8))[0]
+        masks = [ord(byte) for byte in self.rfile.read(4)]
+        decoded = ""
+        for char in self.rfile.read(length):
+            decoded += chr(ord(char) ^ masks[len(decoded) % 4])
+        self.on_message(decoded)
+
+    def send_message(self, message):
+        self.request.send(chr(129))
+        length = len(message)
+        if length <= 125:
+            self.request.send(chr(length))
+        elif length >= 126 and length <= 65535:
+            self.request.send(126)
+            self.request.send(struct.pack(">H", length))
+        else:
+            self.request.send(127)
+            self.request.send(struct.pack(">Q", length))
+        self.request.send(message)
+
+    def handshake(self):
+        data = self.request.recv(1024).strip()
+        headers = Message(StringIO(data.split('\r\n', 1)[1]))
+        if headers.get("Upgrade", None) != "websocket":
+            return
+        print 'Handshaking...'
+        key = headers['Sec-WebSocket-Key']
+        digest = b64encode(sha1(key + self.magic).hexdigest().decode('hex'))
+        response = 'HTTP/1.1 101 Switching Protocols\r\n'
+        response += 'Upgrade: websocket\r\n'
+        response += 'Connection: Upgrade\r\n'
+        response += 'Sec-WebSocket-Accept: %s\r\n\r\n' % digest
+        self.handshake_done = self.request.send(response)
+
+    def on_message(self, message):
+        print message
+
+if __name__ == "__main__":
+    server = SocketServer.TCPServer(
+        ("localhost", 80), WebSocketsHandler)
+    server.socket = ssl.wrap_socket (server.socket, certfile='/home/josch/server.pem', server_side=True)
+    try:
+        server.serve_forever()
+    except Exception as e:
+        server.server_close();
+        pass