92 lines
2.9 KiB
Python
Executable File
92 lines
2.9 KiB
Python
Executable File
#!/usr/bin/python
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'''
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A WebSocket server that echos back whatever it receives from the client.
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Copyright 2010 Joel Martin
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Licensed under LGPL version 3 (see docs/LICENSE.LGPL-3)
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You can make a cert/key with openssl using:
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openssl req -new -x509 -days 365 -nodes -out self.pem -keyout self.pem
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as taken from http://docs.python.org/dev/library/ssl.html#certificates
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'''
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import os, sys, socket, select
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sys.path.insert(0,os.path.dirname(__file__) + "/../")
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from websocket import WebSocketServer
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class WebSocketEcho(WebSocketServer):
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"""
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WebSockets server that echo back whatever is received from the
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client. All traffic to/from the client is base64
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encoded/decoded.
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"""
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buffer_size = 8096
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def new_client(self, client):
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"""
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Echo back whatever is received.
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"""
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cqueue = []
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cpartial = ""
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rlist = [client]
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while True:
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wlist = []
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if cqueue: wlist.append(client)
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ins, outs, excepts = select.select(rlist, wlist, [], 1)
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if excepts: raise Exception("Socket exception")
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if client in outs:
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# Send queued target data to the client
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dat = cqueue.pop(0)
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sent = client.send(dat)
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self.vmsg("Sent %s/%s bytes of frame: '%s'" % (
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sent, len(dat), self.decode(dat)[0]))
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if sent != len(dat):
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# requeue the remaining data
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cqueue.insert(0, dat[sent:])
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if client in ins:
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# Receive client data, decode it, and send it back
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buf = client.recv(self.buffer_size)
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if len(buf) == 0: raise self.EClose("Client closed")
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if buf == '\xff\x00':
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raise self.EClose("Client sent orderly close frame")
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elif buf[-1] == '\xff':
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if cpartial:
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# Prepend saved partial and decode frame(s)
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frames = self.decode(cpartial + buf)
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cpartial = ""
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else:
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# decode frame(s)
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frames = self.decode(buf)
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for frame in frames:
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self.vmsg("Received frame: %s" % repr(frame))
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cqueue.append(self.encode(frame))
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else:
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# Save off partial WebSockets frame
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self.vmsg("Received partial frame")
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cpartial = cpartial + buf
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if __name__ == '__main__':
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try:
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if len(sys.argv) < 1: raise
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listen_port = int(sys.argv[1])
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except:
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print "Usage: %s <listen_port>" % sys.argv[0]
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sys.exit(1)
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server = WebSocketEcho(
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listen_port=listen_port,
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verbose=True,
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cert='self.pem',
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web='.')
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server.start_server()
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