text: #!/usr/bin/env python
  #
  # This script demonstrates how one can use pyOpenSSL to speak SSL over an HTTP
  # proxy
  # The challenge here is to start talking SSL over an already connected socket
  #
  # Author: Mihai Ibanescu <misa@redhat.com>
  #
  # $Id: proxy.py,v 1.2 2004/07/22 12:01:25 martin Exp $
  
  import sys
  import socket
  import string
  
  from OpenSSL import SSL
  
  
  def usage(exit_code=0):
      print "Usage: %s server[:port] proxy[:port]" % sys.argv[0]
      print "  Connects SSL to the specified server (port 443 by default)"
      print "    using the specified proxy (port 8080 by default)"
      sys.exit(exit_code)
  
  
  def main():
      # Command-line processing
      if len(sys.argv) != 3:
          usage(-1)
  
      server, proxy = sys.argv[1:3]
  
      run(split_host(server, 443), split_host(proxy, 8080))
  
  
  def split_host(hostname, default_port=80):
      a = string.split(hostname, ':', 1)
      if len(a) == 1:
          a.append(default_port)
      return a[0], int(a[1])
  
  
  # Connects to the server, through the proxy
  def run(server, proxy):
      s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
      try:
          s.connect(proxy)
      except socket.error, e:
          print "Unable to connect to %s:%s %s" % (proxy[0], proxy[1], str(e))
          sys.exit(-1)
  
      # Use the CONNECT method to get a connection to the actual server
      s.send("CONNECT %s:%s HTTP/1.0\n\n" % (server[0], server[1]))
      print "Proxy response: %s" % string.strip(s.recv(1024))
  
      ctx = SSL.Context(SSL.SSLv23_METHOD)
      conn = SSL.Connection(ctx, s)
  
      # Go to client mode
      conn.set_connect_state()
  
      # start using HTTP
  
      conn.send("HEAD / HTTP/1.0\n\n")
      print "Sever response:"
      print "-" * 40
      while 1:
          try:
              buff = conn.recv(4096)
          except SSL.ZeroReturnError:
              # we're done
              break
  
          print buff,
  
  
  if __name__ == '__main__':
      main()
  