#!/usr/bin/env python
# encoding: utf-8
# middleware to handle https correctly
# Copyright (C) 2009-2010 Marcin Kuzminski <marcin@python-works.com>
 
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; version 2
# of the License or (at your opinion) any later version of the license.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA  02110-1301, USA.

"""
Created on May 23, 2010

@author: marcink
"""

class HttpsFixup(object):
    def __init__(self, app):
        self.application = app
    
    def __call__(self, environ, start_response):
        self.__fixup(environ)
        return self.application(environ, start_response)
    
    
    def __fixup(self, environ):
        """Function to fixup the environ as needed. In order to use this
        middleware you should set this header inside your 
        proxy ie. nginx, apache etc.
        """
        proto = environ.get('HTTP_X_URL_SCHEME')
            
        if proto == 'https':
            environ['wsgi.url_scheme'] = proto
        else:
            environ['wsgi.url_scheme'] = 'http'
        return None