[Twisted-web] proxy and https

19 Mar 2008

      I'm writing a simple content filtering and access restriction proxy
using the twisted web proxy package. Here's some sample code:

#!/usr/bin/env python

from twisted.web import proxy, http
import sys
from twisted.python import log

PROXY_PORT = 80

class FilterProxyClient(proxy.ProxyClient):

   def handleHeader(self, key, value):
       #SOME FILTERING CODE

       proxy.ProxyClient.handleHeader(self, key, value)

   def handleResponsePart(self, data):
       #SOME CONTENT RECOGNITION CODE
           proxy.ProxyClient.handleResponsePart(self, data)

   def handleResponseEnd(self):

       proxy.ProxyClient.handleResponseEnd(self)

class FilterProxyFactory(proxy.ProxyClientFactory):

   def buildProtocol(self, addr):

       client = proxy.ProxyClientFactory.buildProtocol(self, addr)
       # upgrade proxy.proxyClient object to AdpusherProxyClient
       client.__class__ = FilterProxyClient
       return client

class FilterProxyRequest(proxy.ProxyRequest):
   protocols = {'http': AdpusherProxyFactory}

   def __init__(self,*args):

       proxy.ProxyRequest.__init__(self, *args)

   def process(self):
       #SOME FILTERING CODE

       proxy.ProxyRequest.process(self)

class FilterProxy(proxy.Proxy):
   def __init__(self):

       proxy.Proxy.__init__(self)

   def requestFactory(self, *args):

       return FilterProxyRequest( *args)

class FilterProxyFactory(http.HTTPFactory):
   def __init__(self):

       http.HTTPFactory.__init__(self)

   def buildProtocol(self, addr):
       protocol = FilterProxy()
       return protocol

if __name__ == "__main__":

   from twisted.internet import reactor

   prox = FilterProxyFactory()
   reactor.listenTCP(PROXY_PORT, prox)

   reactor.run( )

I'd like to know if there is a way I can set it up so that it also
handles https traffic but doesn't do anythin with the content, just so
that https traffic passes trough it.

[Twisted-web] proxy and https

Vasil Vangelovski