root / snf-astakos-app / astakos / im / views / decorators.py @ fb9ba8d5
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1 | 70e11eaa | Sofia Papagiannaki | # Copyright 2011-2012 GRNET S.A. All rights reserved.
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2 | 70e11eaa | Sofia Papagiannaki | #
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3 | 70e11eaa | Sofia Papagiannaki | # Redistribution and use in source and binary forms, with or
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4 | 70e11eaa | Sofia Papagiannaki | # without modification, are permitted provided that the following
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5 | 70e11eaa | Sofia Papagiannaki | # conditions are met:
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6 | 70e11eaa | Sofia Papagiannaki | #
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7 | 70e11eaa | Sofia Papagiannaki | # 1. Redistributions of source code must retain the above
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8 | 70e11eaa | Sofia Papagiannaki | # copyright notice, this list of conditions and the following
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9 | 70e11eaa | Sofia Papagiannaki | # disclaimer.
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10 | 70e11eaa | Sofia Papagiannaki | #
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11 | 70e11eaa | Sofia Papagiannaki | # 2. Redistributions in binary form must reproduce the above
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12 | 70e11eaa | Sofia Papagiannaki | # copyright notice, this list of conditions and the following
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13 | 70e11eaa | Sofia Papagiannaki | # disclaimer in the documentation and/or other materials
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14 | 70e11eaa | Sofia Papagiannaki | # provided with the distribution.
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15 | 70e11eaa | Sofia Papagiannaki | #
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16 | 70e11eaa | Sofia Papagiannaki | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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17 | 70e11eaa | Sofia Papagiannaki | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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18 | 70e11eaa | Sofia Papagiannaki | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 | 70e11eaa | Sofia Papagiannaki | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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20 | 70e11eaa | Sofia Papagiannaki | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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21 | 70e11eaa | Sofia Papagiannaki | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 | 70e11eaa | Sofia Papagiannaki | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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23 | 70e11eaa | Sofia Papagiannaki | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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24 | 70e11eaa | Sofia Papagiannaki | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | 70e11eaa | Sofia Papagiannaki | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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26 | 70e11eaa | Sofia Papagiannaki | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 | 70e11eaa | Sofia Papagiannaki | # POSSIBILITY OF SUCH DAMAGE.
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28 | 70e11eaa | Sofia Papagiannaki | #
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29 | 70e11eaa | Sofia Papagiannaki | # The views and conclusions contained in the software and
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30 | 70e11eaa | Sofia Papagiannaki | # documentation are those of the authors and should not be
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31 | 70e11eaa | Sofia Papagiannaki | # interpreted as representing official policies, either expressed
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32 | 70e11eaa | Sofia Papagiannaki | # or implied, of GRNET S.A.
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33 | 70e11eaa | Sofia Papagiannaki | |
34 | 70e11eaa | Sofia Papagiannaki | from functools import wraps |
35 | 70e11eaa | Sofia Papagiannaki | |
36 | 70e11eaa | Sofia Papagiannaki | from django.contrib import messages |
37 | 70e11eaa | Sofia Papagiannaki | from django.contrib.auth.decorators import login_required |
38 | 70e11eaa | Sofia Papagiannaki | from django.core.exceptions import PermissionDenied |
39 | 70e11eaa | Sofia Papagiannaki | from django.core.urlresolvers import reverse |
40 | 70e11eaa | Sofia Papagiannaki | from django.http import HttpResponse, HttpResponseRedirect |
41 | 70e11eaa | Sofia Papagiannaki | from django.utils.http import urlencode |
42 | 70e11eaa | Sofia Papagiannaki | |
43 | 70e11eaa | Sofia Papagiannaki | from astakos.im import auth_providers as auth |
44 | 70e11eaa | Sofia Papagiannaki | from astakos.im.cookie import CookieHandler |
45 | 70e11eaa | Sofia Papagiannaki | |
46 | 70e11eaa | Sofia Papagiannaki | |
47 | 70e11eaa | Sofia Papagiannaki | def cookie_fix(func): |
48 | 70e11eaa | Sofia Papagiannaki | """
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49 | 70e11eaa | Sofia Papagiannaki | Decorator checks whether the request.user conforms
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50 | 70e11eaa | Sofia Papagiannaki | with the astakos cookie and if not it fixes it.
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51 | 70e11eaa | Sofia Papagiannaki | """
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52 | 70e11eaa | Sofia Papagiannaki | @wraps(func)
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53 | 70e11eaa | Sofia Papagiannaki | def wrapper(request, *args, **kwargs): |
54 | 70e11eaa | Sofia Papagiannaki | cookie = CookieHandler(request) |
55 | 70e11eaa | Sofia Papagiannaki | if not cookie.is_valid: |
56 | 70e11eaa | Sofia Papagiannaki | # redirect to request path to set/delete the cookie
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57 | 70e11eaa | Sofia Papagiannaki | response = HttpResponse(status=302)
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58 | 70e11eaa | Sofia Papagiannaki | response['Location'] = request.get_full_path()
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59 | 70e11eaa | Sofia Papagiannaki | cookie.fix(response) |
60 | 70e11eaa | Sofia Papagiannaki | return response
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61 | 70e11eaa | Sofia Papagiannaki | |
62 | 70e11eaa | Sofia Papagiannaki | response = func(request, *args, **kwargs) |
63 | 70e11eaa | Sofia Papagiannaki | |
64 | 70e11eaa | Sofia Papagiannaki | # if the user authentication status has changed during the processing
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65 | 70e11eaa | Sofia Papagiannaki | # set/delete the cookie appropriately
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66 | 70e11eaa | Sofia Papagiannaki | if not cookie.is_valid: |
67 | 70e11eaa | Sofia Papagiannaki | cookie.fix(response) |
68 | 70e11eaa | Sofia Papagiannaki | return response
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69 | 70e11eaa | Sofia Papagiannaki | return wrapper
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70 | 70e11eaa | Sofia Papagiannaki | |
71 | 70e11eaa | Sofia Papagiannaki | |
72 | 70e11eaa | Sofia Papagiannaki | def requires_auth_provider(provider_id, **perms): |
73 | 70e11eaa | Sofia Papagiannaki | """
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74 | 70e11eaa | Sofia Papagiannaki | """
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75 | 70e11eaa | Sofia Papagiannaki | def decorator(func, *args, **kwargs): |
76 | 70e11eaa | Sofia Papagiannaki | @wraps(func)
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77 | 70e11eaa | Sofia Papagiannaki | def wrapper(request, *args, **kwargs): |
78 | 70e11eaa | Sofia Papagiannaki | provider = auth.get_provider(provider_id) |
79 | 70e11eaa | Sofia Papagiannaki | |
80 | 70e11eaa | Sofia Papagiannaki | if not provider or not provider.is_active(): |
81 | 70e11eaa | Sofia Papagiannaki | raise PermissionDenied
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82 | 70e11eaa | Sofia Papagiannaki | |
83 | 70e11eaa | Sofia Papagiannaki | for pkey, value in perms.iteritems(): |
84 | 70e11eaa | Sofia Papagiannaki | attr = 'get_%s_policy' % pkey.lower()
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85 | 70e11eaa | Sofia Papagiannaki | if getattr(provider, attr) != value: |
86 | 70e11eaa | Sofia Papagiannaki | #TODO: add session message
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87 | 70e11eaa | Sofia Papagiannaki | return HttpResponseRedirect(reverse('login')) |
88 | 70e11eaa | Sofia Papagiannaki | return func(request, *args)
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89 | 70e11eaa | Sofia Papagiannaki | return wrapper
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90 | 70e11eaa | Sofia Papagiannaki | return decorator
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91 | 70e11eaa | Sofia Papagiannaki | |
92 | 70e11eaa | Sofia Papagiannaki | |
93 | 70e11eaa | Sofia Papagiannaki | def requires_anonymous(func): |
94 | 70e11eaa | Sofia Papagiannaki | """
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95 | 70e11eaa | Sofia Papagiannaki | Decorator checkes whether the request.user is not Anonymous and
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96 | 70e11eaa | Sofia Papagiannaki | in that case redirects to `logout`.
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97 | 70e11eaa | Sofia Papagiannaki | """
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98 | 70e11eaa | Sofia Papagiannaki | @wraps(func)
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99 | 70e11eaa | Sofia Papagiannaki | def wrapper(request, *args): |
100 | 70e11eaa | Sofia Papagiannaki | if not request.user.is_anonymous(): |
101 | 70e11eaa | Sofia Papagiannaki | next = urlencode({'next': request.build_absolute_uri()})
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102 | 70e11eaa | Sofia Papagiannaki | logout_uri = reverse('astakos.im.views.logout') + '?' + next |
103 | 70e11eaa | Sofia Papagiannaki | return HttpResponseRedirect(logout_uri)
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104 | 70e11eaa | Sofia Papagiannaki | return func(request, *args)
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105 | 70e11eaa | Sofia Papagiannaki | return wrapper
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106 | 70e11eaa | Sofia Papagiannaki | |
107 | 70e11eaa | Sofia Papagiannaki | |
108 | 70e11eaa | Sofia Papagiannaki | def signed_terms_required(func): |
109 | 70e11eaa | Sofia Papagiannaki | """
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110 | 70e11eaa | Sofia Papagiannaki | Decorator checks whether the request.user is Anonymous and in that case
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111 | 70e11eaa | Sofia Papagiannaki | redirects to `logout`.
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112 | 70e11eaa | Sofia Papagiannaki | """
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113 | 70e11eaa | Sofia Papagiannaki | @wraps(func)
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114 | 70e11eaa | Sofia Papagiannaki | def wrapper(request, *args, **kwargs): |
115 | 70e11eaa | Sofia Papagiannaki | if request.user.is_authenticated() and not request.user.signed_terms: |
116 | 70e11eaa | Sofia Papagiannaki | params = urlencode({'next': request.build_absolute_uri(),
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117 | 70e11eaa | Sofia Papagiannaki | 'show_form': ''}) |
118 | 70e11eaa | Sofia Papagiannaki | terms_uri = reverse('latest_terms') + '?' + params |
119 | 70e11eaa | Sofia Papagiannaki | return HttpResponseRedirect(terms_uri)
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120 | 70e11eaa | Sofia Papagiannaki | return func(request, *args, **kwargs)
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121 | 70e11eaa | Sofia Papagiannaki | return wrapper
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122 | 70e11eaa | Sofia Papagiannaki | |
123 | 70e11eaa | Sofia Papagiannaki | |
124 | 70e11eaa | Sofia Papagiannaki | def required_auth_methods_assigned(allow_access=False): |
125 | 70e11eaa | Sofia Papagiannaki | """
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126 | 70e11eaa | Sofia Papagiannaki | Decorator that checks whether the request.user has all
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127 | 70e11eaa | Sofia Papagiannaki | required auth providers assigned.
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128 | 70e11eaa | Sofia Papagiannaki | """
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129 | 70e11eaa | Sofia Papagiannaki | |
130 | 70e11eaa | Sofia Papagiannaki | def decorator(func): |
131 | 70e11eaa | Sofia Papagiannaki | @wraps(func)
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132 | 70e11eaa | Sofia Papagiannaki | def wrapper(request, *args, **kwargs): |
133 | 70e11eaa | Sofia Papagiannaki | if request.user.is_authenticated():
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134 | 70e11eaa | Sofia Papagiannaki | missing = request.user.missing_required_providers() |
135 | 70e11eaa | Sofia Papagiannaki | if missing:
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136 | 70e11eaa | Sofia Papagiannaki | for provider in missing: |
137 | 70e11eaa | Sofia Papagiannaki | messages.error(request, |
138 | 70e11eaa | Sofia Papagiannaki | provider.get_required_msg) |
139 | 70e11eaa | Sofia Papagiannaki | if not allow_access: |
140 | 70e11eaa | Sofia Papagiannaki | return HttpResponseRedirect(reverse('edit_profile')) |
141 | 70e11eaa | Sofia Papagiannaki | return func(request, *args, **kwargs)
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142 | 70e11eaa | Sofia Papagiannaki | return wrapper
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143 | 70e11eaa | Sofia Papagiannaki | return decorator
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144 | 70e11eaa | Sofia Papagiannaki | |
145 | 70e11eaa | Sofia Papagiannaki | |
146 | 70e11eaa | Sofia Papagiannaki | def valid_astakos_user_required(func): |
147 | 70e11eaa | Sofia Papagiannaki | return signed_terms_required(
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148 | 70e11eaa | Sofia Papagiannaki | required_auth_methods_assigned()(login_required(func))) |