root / snf-astakos-app / astakos / im / views / decorators.py @ 70e11eaa
History | View | Annotate | Download (5.3 kB)
1 |
# Copyright 2011-2012 GRNET S.A. All rights reserved.
|
---|---|
2 |
#
|
3 |
# Redistribution and use in source and binary forms, with or
|
4 |
# without modification, are permitted provided that the following
|
5 |
# conditions are met:
|
6 |
#
|
7 |
# 1. Redistributions of source code must retain the above
|
8 |
# copyright notice, this list of conditions and the following
|
9 |
# disclaimer.
|
10 |
#
|
11 |
# 2. Redistributions in binary form must reproduce the above
|
12 |
# copyright notice, this list of conditions and the following
|
13 |
# disclaimer in the documentation and/or other materials
|
14 |
# provided with the distribution.
|
15 |
#
|
16 |
# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
|
17 |
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
18 |
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
19 |
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
|
20 |
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
21 |
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
22 |
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
23 |
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
24 |
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
25 |
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
26 |
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
27 |
# POSSIBILITY OF SUCH DAMAGE.
|
28 |
#
|
29 |
# The views and conclusions contained in the software and
|
30 |
# documentation are those of the authors and should not be
|
31 |
# interpreted as representing official policies, either expressed
|
32 |
# or implied, of GRNET S.A.
|
33 |
|
34 |
from functools import wraps |
35 |
|
36 |
from django.contrib import messages |
37 |
from django.contrib.auth.decorators import login_required |
38 |
from django.core.exceptions import PermissionDenied |
39 |
from django.core.urlresolvers import reverse |
40 |
from django.http import HttpResponse, HttpResponseRedirect |
41 |
from django.utils.http import urlencode |
42 |
|
43 |
from astakos.im import auth_providers as auth |
44 |
from astakos.im.cookie import CookieHandler |
45 |
|
46 |
|
47 |
def cookie_fix(func): |
48 |
"""
|
49 |
Decorator checks whether the request.user conforms
|
50 |
with the astakos cookie and if not it fixes it.
|
51 |
"""
|
52 |
@wraps(func)
|
53 |
def wrapper(request, *args, **kwargs): |
54 |
cookie = CookieHandler(request) |
55 |
if not cookie.is_valid: |
56 |
# redirect to request path to set/delete the cookie
|
57 |
response = HttpResponse(status=302)
|
58 |
response['Location'] = request.get_full_path()
|
59 |
cookie.fix(response) |
60 |
return response
|
61 |
|
62 |
response = func(request, *args, **kwargs) |
63 |
|
64 |
# if the user authentication status has changed during the processing
|
65 |
# set/delete the cookie appropriately
|
66 |
if not cookie.is_valid: |
67 |
cookie.fix(response) |
68 |
return response
|
69 |
return wrapper
|
70 |
|
71 |
|
72 |
def requires_auth_provider(provider_id, **perms): |
73 |
"""
|
74 |
"""
|
75 |
def decorator(func, *args, **kwargs): |
76 |
@wraps(func)
|
77 |
def wrapper(request, *args, **kwargs): |
78 |
provider = auth.get_provider(provider_id) |
79 |
|
80 |
if not provider or not provider.is_active(): |
81 |
raise PermissionDenied
|
82 |
|
83 |
for pkey, value in perms.iteritems(): |
84 |
attr = 'get_%s_policy' % pkey.lower()
|
85 |
if getattr(provider, attr) != value: |
86 |
#TODO: add session message
|
87 |
return HttpResponseRedirect(reverse('login')) |
88 |
return func(request, *args)
|
89 |
return wrapper
|
90 |
return decorator
|
91 |
|
92 |
|
93 |
def requires_anonymous(func): |
94 |
"""
|
95 |
Decorator checkes whether the request.user is not Anonymous and
|
96 |
in that case redirects to `logout`.
|
97 |
"""
|
98 |
@wraps(func)
|
99 |
def wrapper(request, *args): |
100 |
if not request.user.is_anonymous(): |
101 |
next = urlencode({'next': request.build_absolute_uri()})
|
102 |
logout_uri = reverse('astakos.im.views.logout') + '?' + next |
103 |
return HttpResponseRedirect(logout_uri)
|
104 |
return func(request, *args)
|
105 |
return wrapper
|
106 |
|
107 |
|
108 |
def signed_terms_required(func): |
109 |
"""
|
110 |
Decorator checks whether the request.user is Anonymous and in that case
|
111 |
redirects to `logout`.
|
112 |
"""
|
113 |
@wraps(func)
|
114 |
def wrapper(request, *args, **kwargs): |
115 |
if request.user.is_authenticated() and not request.user.signed_terms: |
116 |
params = urlencode({'next': request.build_absolute_uri(),
|
117 |
'show_form': ''}) |
118 |
terms_uri = reverse('latest_terms') + '?' + params |
119 |
return HttpResponseRedirect(terms_uri)
|
120 |
return func(request, *args, **kwargs)
|
121 |
return wrapper
|
122 |
|
123 |
|
124 |
def required_auth_methods_assigned(allow_access=False): |
125 |
"""
|
126 |
Decorator that checks whether the request.user has all
|
127 |
required auth providers assigned.
|
128 |
"""
|
129 |
|
130 |
def decorator(func): |
131 |
@wraps(func)
|
132 |
def wrapper(request, *args, **kwargs): |
133 |
if request.user.is_authenticated():
|
134 |
missing = request.user.missing_required_providers() |
135 |
if missing:
|
136 |
for provider in missing: |
137 |
messages.error(request, |
138 |
provider.get_required_msg) |
139 |
if not allow_access: |
140 |
return HttpResponseRedirect(reverse('edit_profile')) |
141 |
return func(request, *args, **kwargs)
|
142 |
return wrapper
|
143 |
return decorator
|
144 |
|
145 |
|
146 |
def valid_astakos_user_required(func): |
147 |
return signed_terms_required(
|
148 |
required_auth_methods_assigned()(login_required(func))) |