source: mauRepo/dj_security/trunk/dj_security/middleware.py @ 8741

Subversion URL: http://proj.badc.rl.ac.uk/svn/ndg/mauRepo/dj_security/trunk/dj_security/middleware.py@8741
Revision 8741, 6.1 KB checked in by mnagni, 7 years ago (diff)

Incomplete - # 22698: [CEDA Site Python Port] MyCEDA Login needs to be more user-friendly
 http://team.ceda.ac.uk/trac/ceda/ticket/22698

  • 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, DJSException
37
38from userdb_model.models import User
39
40import socket
41import urlparse
42import base64
43import logging
44from django.contrib.auth import SESSION_KEY
45
46# Get an instance of a logger
47LOGGER = logging.getLogger(__name__)
48
49class DJS_Middleware(object):
50    """
51        Validates if the actual user is authenticated agains a
52        given authentication service.
53        Actually the middleware intercepts all the requests submitted
54        to the underlying Django application and verifies if the presence
55        or not of a valid paste cookie in the request.
56    """           
57    __do_init = False
58   
59    def __init_app(self):
60        try:
61            setattr(settings, 'HOSTNAME', socket.gethostname())
62        except Exception:
63            setattr(settings, 'HOSTNAME', 'localhost')
64        from django.contrib.sites.models import Site
65        from django.db.utils import DatabaseError   
66        try:
67            site = Site()
68            site.name = getattr(settings, 'HOSTNAME')
69            site.domain = getattr(settings, 'HOSTNAME') \
70                + '/' + getattr(settings, 'APPLICATION_ROOT')
71            site.save()
72            #Sets the default site
73            setattr(settings, 'SITE_ID', site.pk)
74        except DatabaseError as ex:
75            print str(ex)
76   
77    def process_request(self, request):
78        if DJS_Middleware.__do_init:
79            self.__init_app()
80        pass
81   
82    def process_response(self, request, response):
83        return response               
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_byuserkey(user_id):
105    """
106        Returns a tbusers row specified by `user_id`
107    - String **user_id**
108        a user
109    """
110    try:
111        return User.objects.get(userkey=user_id)
112    except DatabaseError as ex:
113        logging.error("Userkey: %s - Not Found" % user_id)
114        raise DSJOpenIDNotFoundError(ex)
115
116def _get_path_to_host(request, force_path = None):
117    host = request.environ.get('HTTP_HOST')
118    if not host:
119        host = ''.join([request.environ['SERVER_HOST'],
120                        ':' ,
121                        request.environ['SERVER_PORT']])
122   
123    if force_path:
124        return base64.b64encode(''.join(['http://',
125                                      host, '/',
126                                      force_path]))
127       
128    return base64.b64encode(''.join(['http://',
129                                      host, '/',
130                                      request.path]))
131
132def _encode_authenticated_response(request, response, redirect_to, user):
133    #def_r = _get_path_to_host(request)
134    #remote_url = request.session.get('r', def_r)
135   
136    #if not redirect_to:
137    #    raise DJSException('Missing url where redirect logged in user')
138   
139    remote_ip = _calculate_remote_ip(redirect_to)
140    LOGGER.info("responding to remote_ip: %s" % (remote_ip))     
141    #user = get_user_byuserkey(request.session[SESSION_KEY])
142   
143    ''' 
144    if request.session.has_key('openid'):
145        username = request.session.get('openid').openid
146        request.user = get_user_byopenid(username)
147    elif hasattr(request, 'user'):
148    '''   
149   
150    token = AuthTicket(
151                getattr(settings, 'SHARED_SECRET', 'sharedsecret'),
152                user.accountid,
153                remote_ip,
154                user_data = '{"userkey": "%s", "accountid": "%s"}'
155                % (user.userkey, getattr("user", "accountid", "NotAssigned")))               
156    LOGGER.info("Created authTicket for %s from %s" % (user.accountid, remote_ip))
157    idomain = getattr(settings, 'COOKIE_DOMAIN', None)
158    response.set_cookie('auth_tkt',
159                        token.cookie_value(),
160                        domain = idomain)
161    LOGGER.debug("Set authTicket in response for %s from %s to domain %s"
162                 % (user.accountid, remote_ip, idomain))
163    return response
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