A very small python HTTP proxy

microproxy.py

#!/usr/bin/env python 

"""
Microproxy
This code is based on http://pastebin.com/mdsAjhdQ based on code based on microproxy.py written by ubershmekel in 2006.

Microproxy is a very small HTTP proxy. It relays all bytes from the client to the server at a socket send and recv level.
It looks at the Host: header to recognise where to connect to.

"""

import re
import socket
import signal
import sys
import threading

def sigint_received(signum, frame):
    sys.exit(0)
signal.signal(signal.SIGINT, sigint_received)

PORT = 8080
regexHost = re.compile(r'Host: ([^\s]*)', re.IGNORECASE)
regexUri = re.compile(r'((?:GET|POST) [^\s]*)')

class ConnectionThread(threading.Thread):
    def __init__(self, (conn,addr)):
        self.conn = conn
        self.addr = addr
        threading.Thread.__init__(self)

    def run(self):
        data = self.conn.recv(1024*1024)
        host = regexHost.search(data).groups()[0]
        uri = regexUri.search(data).groups()[0]
        print '%s, %s' % (host, uri)
        request = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        #request.settimeout(6) 
        request.connect((host, 80))
        request.send(data)
        while 1:
            temp = request.recv(1024)
            if not temp: break
            self.conn.send(temp)
        self.conn.close()

class ProxyThread(threading.Thread):
    def __init__(self, port):
        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        self.sock.bind(('0.0.0.0', port))
        threading.Thread.__init__(self)

    def run(self):
        self.sock.listen(10)
        while 1:
            temp = ConnectionThread(self.sock.accept())
            temp.daemon = True
            temp.start()

if __name__ == "__main__":
    proxy = ProxyThread(PORT)
    proxy.daemon = True
    proxy.start()
    print "Started a proxy on port", PORT
    while 1: pass