A simple python server that accepts connections on a given port and simply dumps all data it receives from a client that connects to that port.

socket-dump.py

#!/usr/bin/python

#
# A simple python server that accepts connections on a given port and simply dumps
# all data it receives from a client that connects to that port.
#
# The listening port number can be provided as an argument; the default is 8080.
#
# Copyright (c) 2013 Arun Nair (http://nairteashop.org).
# Licensed under the MIT license.
#

import sys
from socket import *

port = 8080
if len(sys.argv) > 1:
    port = int( sys.argv[1] )

s = socket( AF_INET, SOCK_STREAM )
s.bind( ("",port) )
s.listen(1)

print "Listening on port", port

c, addr = s.accept()

print "Client connected from", addr
print "Disconnect client to quit."

while True:
    try:
        data = c.recv(1024)
        if not data: break
    except KeyboardInterrupt:
        pass
    print ' '.join('0x%s' % c.encode('hex') for c in data) + '\t' + data 

c.close()