source: mauRepo/dj_security/trunk/dj_security/middleware.py @ 8710

Subversion URL: http://proj.badc.rl.ac.uk/svn/ndg/mauRepo/dj_security/trunk/dj_security/middleware.py@8710
Revision 8710, 5.2 KB checked in by mnagni, 7 years ago (diff)

Adds few logging

  • Property svn:mime-type set to text/plain
Line 
1'''
2BSD Licence
3Copyright (c) 2012, Science & Technology Facilities Council (STFC)
4All rights reserved.
5
6Redistribution and use in source and binary forms, with or without modification,
7are permitted provided that the following conditions are met:
8
9    * Redistributions of source code must retain the above copyright notice,
10        this list of conditions and the following disclaimer.
11    * Redistributions in binary form must reproduce the above copyright notice,
12        this list of conditions and the following disclaimer in the documentation
13        and/or other materials provided with the distribution.
14    * Neither the name of the Science & Technology Facilities Council (STFC)
15        nor the names of its contributors may be used to endorse or promote
16        products derived from this software without specific prior written permission.
17
18THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
22BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
23OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29Created on 2 Nov 2012
30
31@author: mnagni
32'''
33from paste.auth.auth_tkt import AuthTicket
34from django.conf import settings
35from django.db.utils import DatabaseError
36from dj_security.exception import DSJOpenIDNotFoundError
37from dj_security.encoder import SecurityEncoder
38from django.shortcuts import render_to_response, redirect
39
40from userdb_model.models import User
41
42import socket
43import urlparse
44import base64
45import logging
46
47# Get an instance of a logger
48LOGGER = logging.getLogger(__name__)
49
50class DJS_Middleware(object):
51    """
52        Validates if the actual user is authenticated agains a
53        given authentication service.
54        Actually the middleware intercepts all the requests submitted
55        to the underlying Django application and verifies if the presence
56        or not of a valid paste cookie in the request.
57    """           
58   
59    def process_request(self, request):
60        pass
61   
62    def process_response(self, request, response):
63        LOGGER.debug("responding to request.path: %s" % (request.path))
64        session = getattr(request, 'session', None)
65       
66        if not session:       
67            return response
68       
69        if request.GET.get('r') and getattr(request, 'session', None):
70            request.session['r'] = request.GET.get('r')
71
72        if '/complete/' not in request.path:
73            request.session['done'] = False
74            return response
75
76        if request.path == '/account/signin/complete/' and not request.session.get('done', False):
77            return _encode_authenticated_response(request, response)
78
79        #if request.path == '/account/signin/complete/' and request.session.get('done', False):
80        #    return response
81       
82        return response
83       
84   
85def _calculate_remote_ip(url_path):   
86    remote_url = urlparse.urlparse(url_path)
87    LOGGER.debug("calculating remote_ip for %s" % (str(remote_url)))
88    port = 80
89    host = None
90    if remote_url.netloc:
91        host = remote_url.netloc
92    elif remote_url.path:
93        host = remote_url.path
94       
95    if not host:
96        return None
97   
98    if ':' in host:
99        host, port = host.split(':')
100    addrinfo = socket.getaddrinfo(host, int(port))
101    LOGGER.info("%s has remote_ip %s" % (url_path, addrinfo[0][-1][0]))                                 
102    return addrinfo[0][-1][0]
103
104def get_user_byopenid(openid):
105    """
106        Returns a tbusers row specified by `openid`
107    - String **userkey**
108        a user
109    """
110    try:
111        return User.objects.get(openid=openid)
112    except DatabaseError as ex:
113        logging.error("Openid: %s - Not Found" % openid)
114        raise DSJOpenIDNotFoundError(ex) 
115
116def _encode_authenticated_response(request, response, context = {}):
117    remote_ip = _calculate_remote_ip(base64.b64decode(request.session.get('r')))
118    LOGGER.info("responding to remote_ip: %s" % (remote_ip))
119    username = request.session.get('openid').openid
120    user = get_user_byopenid(username)
121   
122    token = AuthTicket(
123                getattr(settings, 'SHARED_SECRET', 'sharedsecret'),
124                username,
125                remote_ip,
126                user_data = '{"userkey": "%s"}' % (user.userkey))               
127    LOGGER.info("Created authTicket for %s from %s" % (username, remote_ip))
128    response.set_cookie('auth_tkt',
129                        token.cookie_value(),
130                        domain = getattr(settings, 'COOKIE_DOMAIN', None))
131    LOGGER.debug("Set authTicket in response for %s from %s" % (username, remote_ip))
132    redirect_parameter = getattr(settings, 'REDIRECT_URL', 'r')
133    context['redirect_url'] = base64.b64decode(request.session.get(redirect_parameter, ''))
134    return render_to_response('logged_in.html', context)
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