97 lines
3.0 KiB
Python
Executable File
97 lines
3.0 KiB
Python
Executable File
#!/usr/bin/python
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import sys, os, socket, time, traceback
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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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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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client.send(server_handshake % (origin, host, path))
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def traffic(token="."):
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sys.stdout.write(token)
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sys.stdout.flush()
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def proxy(client, target):
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cqueue = []
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tqueue = []
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socks = [client, target]
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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 client in ins:
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buf = client.recv(1024)
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if len(buf) == 0: 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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traffic("}")
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if target in ins:
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buf = target.recv(1024)
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if len(buf) == 0: raise Exception("Target closed")
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cqueue.append("\x00" + buf + "\xff")
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#print "Target recv: %s (%d)" % (buf, len(buf))
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traffic("{")
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if cqueue and client in outs:
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while cqueue:
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#print "Client send: %s" % cqueue[0]
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client.send(cqueue.pop(0))
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traffic("<")
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if tqueue and target in outs:
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while tqueue:
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#print "Target send: %s" % tqueue[0]
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sys.stdout.flush()
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target.send(tqueue.pop(0))
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traffic(">")
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def start_server(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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csock = tsock = None
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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 from %s' % address[0]
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handshake(csock)
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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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proxy(csock, tsock)
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except Exception:
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print "Ignoring exception:"
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print traceback.format_exc()
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if csock: csock.close()
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if tsock: tsock.close()
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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_server(listen_port, target_host, target_port)
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