attempt at a proxy server. Really slow, I think it has to be threaded or something to work right.

httpproxy.py

import socket

class Proxy:
  
  serversock_port = 987654
  
  def __init__(self, host='localhost', port=1234, req_func=None, resp_func=None):
    self.browsersock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    self.browsersock.bind((host,port))
    print 'listening %s:%d' % (host,port)
    self.browsersock.listen(5)
    if req_func is None:
      self.request_function = lambda req: req
    else:
      self.request_function = req_func
    if resp_func is None:
      self.response_function = lambda resp: resp
    else:
      self.response_function = resp_func
  
  def listen(self):
    try:
      while 1:
        (connection, address) = self.browsersock.accept()
        request = connection.recv(4096)
        response = self.dorequest(request)
        connection.sendall(response)
        connection.close()
    except KeyboardInterrupt:
      self.browsersock.close()
      print 'bye!'
  
  def dorequest(self, request):
    request = self.request_function(request)
    serverhost = self.gethost(request)
    serversock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    serversock.bind((socket.gethostname(),self.serversock_port))
    self.serversock_port += 1
    try:
      serversock.connect((serverhost,80))
      serversock.sendall(request)
      response = ''
      done = False
      while not done:
        chunk = serversock.recv(4096)
        print len(chunk)
        if len(chunk) > 0:
          response += chunk
        else:
          done = True
    finally:
      serversock.close()
    return self.response_function(response)
  
  def gethost(self, request):
    lines = request.split('\n')
    for line in lines:
      if line.startswith('Host:') or line.startswith('host:'):
        return line.split(':')[1].strip()
  

def req_func(request):
  print '>>>>>>>>>>>>>>>>>>>> ' + request.split('\n')[0]
  return request

def resp_func(response):
  print response
  print
  print
  return response

Proxy(port=1245,req_func=req_func,resp_func=resp_func).listen()