#!/usr/bin/env python

# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed
# with this work for additional information regarding copyright
# ownership.  The ASF licenses this file to you under the Apache
# License, Version 2.0 (the "License"); you may not use this file
# except in compliance with the License.  You may obtain a copy of the
# License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.  See the License for the specific language governing
# permissions and limitations under the License.

print '''1..2 location
# The proxy rewrites the Location header if the file is already cached'''

from twisted.internet import error, protocol, reactor, tcp
from twisted.web import http

def callback():
  print 'not ok 1 - Why didn\'t the test finish yet?'

  reactor.stop()

reactor.callLater(1, callback)

class factory(http.HTTPFactory):
  class protocol(http.HTTPChannel):
    class requestFactory(http.Request):
      def requestReceived(ctx, method, target, version):

        ctx.client = None
        ctx.clientproto = version

        if target == '/location':

          ctx.write('location')
          ctx.finish()

        else:

          ctx.setHeader('Digest', 'SHA-256=5urqGOiF4QeIKbVt80iWvlq1FDno8LoAyxYkssVywQ4=')
          ctx.setHeader('Location', 'http://example.com')
          ctx.finish()

origin = tcp.Port(0, factory())
origin.startListening()

print '# Listening on {0}:{1}'.format(*origin.socket.getsockname())

class factory(protocol.ClientFactory):
  def clientConnectionFailed(ctx, connector, reason):

    print 'Bail out!'
    reason.printTraceback()

    reactor.stop()

  class protocol(http.HTTPClient):
    def connectionLost(ctx, reason):
      try:
        reactor.stop()

      except error.ReactorNotRunning:
        pass

      else:
        print 'not ok 1 - Did the proxy crash?  (The client connection closed.)'

    # Get a response with a Location and a Digest header and check
    # that the Location header is not rewritten.  Then get the same
    # response after caching a matching file from a different URL and
    # check that this time the header is rewritten.
    connectionMade = lambda ctx: ctx.transport.write('GET {0}:{1} HTTP/1.1\r\n\r\nGET {0}:{1}/location HTTP/1.1\r\n\r\nGET {0}:{1} HTTP/1.1\r\n\r\n'.format(*origin.socket.getsockname()))

    def handleResponsePart(ctx, data):
      try:
        h, r = data.split('0\r\n\r\n', 1)

      except ValueError:
        pass

      else:

        ctx.firstLine = True
        ctx.setLineMode(r)

    def handleStatus(ctx, version, status, message):
      def handleHeader(k, v):
        if k.lower() == 'location':
          if v != 'http://example.com':
            print 'not',

          print 'ok 1 - Before'

      ctx.handleHeader = handleHeader

      def handleStatus(version, status, message):
        del ctx.handleHeader

        def handleStatus(version, staus, message):
          def handleHeader(k, v):
            if k.lower() == 'location':
              if v != 'http://{0}:{1}/location'.format(*origin.socket.getsockname()):
                print 'not',

              print 'ok 2 - After'

              reactor.stop()

          ctx.handleHeader = handleHeader

        ctx.handleStatus = handleStatus

      ctx.handleStatus = handleStatus

tcp.Connector('localhost', 8080, factory(), 30, None, reactor).connect()

reactor.run()
