PyProxy is a very simple TCP/UDP pure Python proxy. It can be easily extended for custom data handling logic.
>pyproxy.py -h usage: pyproxy.py [-h] (--tcp | --udp) -s SRC -d DST [-q | -v] TCP/UPD proxy. optional arguments: -h, --help show this help message and exit --tcp TCP proxy --udp UDP proxy -s SRC, --src SRC Source IP and port, i.e.: 127.0.0.1:8000 -d DST, --dst DST Destination IP and port, i.e.: 127.0.0.1:8888 -q, --quiet Be quiet -v, --verbose Be loud
Proxy uses two data handlers for incoming and outgoing data. By default both are set to identity function.
LOCAL_DATA_HANDLER = lambda x:x REMOTE_DATA_HANDLER = lambda x:x
One can easily implement own rules. It might be very useful while testing network applications.
def custom_data_handler(data): # code goes here pass LOCAL_DATA_HANDLER = custom_data_handler REMOTE_DATA_HANDLER = lambda x:'constant_value'
Code is released under MIT license © Radoslaw '[rsc]' Matusiak.