author | Sverre Rabbelier <srabbelier@gmail.com> |
Sat, 29 Nov 2008 22:48:15 +0000 | |
changeset 619 | 7b61da3d4306 |
parent 617 | 9cc42981d40a |
child 633 | 899ec5d546bd |
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#!/usr/bin/python2.5 |
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# |
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# Copyright 2008 the Melange authors. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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|
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"""Access control helper. |
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The functions in this module can be used to check access control |
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related requirements. When the specified required conditions are not |
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met, an exception is raised. This exception contains a views that |
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either prompts for authentication, or informs the user that they |
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do not meet the required criteria. |
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""" |
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__authors__ = [ |
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'"Todd Larsen" <tlarsen@google.com>', |
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'"Sverre Rabbelier" <sverre@rabbelier.nl>', |
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'"Pawel Solyga" <pawel.solyga@gmail.com>', |
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] |
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from google.appengine.api import users |
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from django.utils.translation import ugettext_lazy |
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from soc.logic import accounts |
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from soc.logic.models import user as user_logic |
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from soc.logic.models import request as request_logic |
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from soc.views import helper |
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from soc.views import out_of_band |
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DEF_NO_USER_LOGIN_MSG_FMT = ugettext_lazy( |
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'Please create <a href="/user/edit">User Profile</a>' |
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' in order to view this page.') |
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DEF_DEV_LOGOUT_LOGIN_MSG_FMT = ugettext_lazy( |
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'Please <a href="%%(sign_out)s">sign out</a>' |
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' and <a href="%%(sign_in)s">sign in</a>' |
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' again as %(role)s to view this page.') |
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DEF_PAGE_DENIED_MSG = ugettext_lazy( |
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'Access to this page has been restricted') |
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DEF_LOGOUT_MSG_FMT = ugettext_lazy( |
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'Please <a href="%(sign_out)s">sign out</a> in order to view this page') |
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def checkAccess(access_type, request, rights): |
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"""Runs all the defined checks for the specified type |
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Args: |
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access_type: the type of request (such as 'list' or 'edit') |
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request: the Django request object |
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rights: A dictionary containing access check functions |
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Rights usage: The rights dictionary is used to check if the |
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current user is allowed to view the page specified. The |
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functions defined in this dictionary are always called with the |
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django request object as argument. |
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On any request, regardless of what type, the functions in the |
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'any_access' value are called. |
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If the specified type is not in the rights dictionary, all the |
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functions in the 'unspecified' value are called. |
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When the specified type _is_ in the rights dictionary, all the |
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functions in that access_type's value are called. |
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Returns: |
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True: If all the required access checks have been made successfully |
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False: If a check failed, in this case self._response will contain |
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the response provided by the failed access check. |
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""" |
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# Call each access checker |
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for check in rights['any_access']: |
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check(request) |
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if access_type not in rights: |
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for check in rights['unspecified']: |
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# No checks defined, so do the 'generic' checks and bail out |
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check(request) |
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return |
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for check in rights[access_type]: |
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check(request) |
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def allow(request): |
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"""Never returns an alternate HTTP response |
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Args: |
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request: a Django HTTP request |
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""" |
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return |
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def deny(request): |
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"""Returns an alternate HTTP response |
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Args: |
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request: a Django HTTP request |
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Returns: a subclass of django.http.HttpResponse which contains the |
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alternate response that should be returned by the calling view. |
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""" |
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|
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context = helper.responses.getUniversalContext(request) |
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context['title'] = 'Access denied' |
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raise out_of_band.AccessViolation(DEF_PAGE_DENIED_MSG, context=context) |
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123 |
|
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def checkIsLoggedIn(request): |
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"""Returns an alternate HTTP response if Google Account is not logged in. |
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|
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Args: |
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request: a Django HTTP request |
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|
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130 |
Raises: |
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AccessViolationResponse: If the required authorization is not met. |
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132 |
|
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Returns: |
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None if the user is logged in, or a subclass of |
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135 |
django.http.HttpResponse which contains the alternate response |
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that should be returned by the calling view. |
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137 |
""" |
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138 |
|
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if users.get_current_user(): |
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return |
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|
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raise out_of_band.LoginRequest() |
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|
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144 |
|
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def checkNotLoggedIn(request): |
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"""Returns an alternate HTTP response if Google Account is not logged in. |
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|
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Args: |
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request: a Django HTTP request |
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|
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Raises: |
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AccessViolationResponse: If the required authorization is not met. |
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|
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Returns: |
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None if the user is logged in, or a subclass of |
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django.http.HttpResponse which contains the alternate response |
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that should be returned by the calling view. |
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""" |
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|
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if not users.get_current_user(): |
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return |
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|
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raise out_of_band.LoginRequest(message_fmt=DEF_LOGOUT_MSG_FMT) |
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|
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165 |
|
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def checkIsUser(request): |
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"""Returns an alternate HTTP response if Google Account has no User entity. |
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168 |
|
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169 |
Args: |
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request: a Django HTTP request |
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171 |
|
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172 |
Raises: |
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173 |
AccessViolationResponse: If the required authorization is not met. |
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|
174 |
|
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175 |
Returns: |
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None if User exists for a Google Account, or a subclass of |
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177 |
django.http.HttpResponse which contains the alternate response |
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178 |
should be returned by the calling view. |
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|
179 |
""" |
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|
180 |
|
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181 |
checkIsLoggedIn(request) |
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|
182 |
|
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183 |
user = user_logic.logic.getForFields( |
481
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184 |
{'account': users.get_current_user()}, unique=True) |
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185 |
|
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186 |
if user: |
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187 |
return |
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188 |
|
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189 |
raise out_of_band.LoginRequest(message_fmt=DEF_NO_USER_LOGIN_MSG_FMT) |
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190 |
|
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|
191 |
|
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|
192 |
def checkIsDeveloper(request): |
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193 |
"""Returns an alternate HTTP response if Google Account is not a Developer. |
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|
194 |
|
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195 |
Args: |
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|
196 |
request: A Django HTTP request |
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|
197 |
|
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|
198 |
Raises: |
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|
199 |
AccessViolationResponse: If the required authorization is not met. |
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|
200 |
|
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|
201 |
Returns: |
481
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|
202 |
None if Google Account is logged in and logged-in user is a Developer, |
94834a1e6c01
Attempt to rename User.id to User.account, in preparation for making User be
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|
203 |
or a subclass of django.http.HttpResponse which contains the alternate |
293
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|
204 |
response should be returned by the calling view. |
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|
205 |
""" |
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|
206 |
|
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|
207 |
checkIsUser(request) |
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|
208 |
|
481
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|
209 |
if accounts.isDeveloper(account=users.get_current_user()): |
293
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210 |
return None |
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|
211 |
|
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|
212 |
login_message_fmt = DEF_DEV_LOGOUT_LOGIN_MSG_FMT % { |
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213 |
'role': 'a site developer '} |
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|
214 |
|
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|
215 |
raise out_of_band.LoginRequest(message_fmt=login_message_fmt) |
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|
216 |
|
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217 |
|
617
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Now invited users can create a new Host profile
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|
218 |
def checkIsInvited(request): |
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219 |
"""Returns an alternate HTTP response if Google Account has no Host entity |
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|
220 |
for the specified program. |
293
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221 |
|
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222 |
Args: |
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|
223 |
request: A Django HTTP request |
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|
224 |
|
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|
225 |
Raises: |
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226 |
AccessViolationResponse: If the required authorization is not met. |
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|
227 |
|
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228 |
Returns: |
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229 |
None if Host exists for the specified program, or a subclass of |
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|
230 |
django.http.HttpResponse which contains the alternate response |
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|
231 |
should be returned by the calling view. |
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|
232 |
""" |
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|
233 |
|
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|
234 |
checkIsUser(request) |
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|
235 |
|
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236 |
login_message_fmt = DEF_DEV_LOGOUT_LOGIN_MSG_FMT % { |
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237 |
'role': 'a host for this program'} |
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|
238 |
|
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|
239 |
splitpath = request.path.split('/') |
9cc42981d40a
Now invited users can create a new Host profile
Sverre Rabbelier <srabbelier@gmail.com>
parents:
612
diff
changeset
|
240 |
|
9cc42981d40a
Now invited users can create a new Host profile
Sverre Rabbelier <srabbelier@gmail.com>
parents:
612
diff
changeset
|
241 |
if len(splitpath) < 4: |
9cc42981d40a
Now invited users can create a new Host profile
Sverre Rabbelier <srabbelier@gmail.com>
parents:
612
diff
changeset
|
242 |
# TODO: perhaps this needs a better explanation? |
9cc42981d40a
Now invited users can create a new Host profile
Sverre Rabbelier <srabbelier@gmail.com>
parents:
612
diff
changeset
|
243 |
deny(request) |
9cc42981d40a
Now invited users can create a new Host profile
Sverre Rabbelier <srabbelier@gmail.com>
parents:
612
diff
changeset
|
244 |
|
9cc42981d40a
Now invited users can create a new Host profile
Sverre Rabbelier <srabbelier@gmail.com>
parents:
612
diff
changeset
|
245 |
role = splitpath[1] |
9cc42981d40a
Now invited users can create a new Host profile
Sverre Rabbelier <srabbelier@gmail.com>
parents:
612
diff
changeset
|
246 |
group_id = splitpath[3] |
9cc42981d40a
Now invited users can create a new Host profile
Sverre Rabbelier <srabbelier@gmail.com>
parents:
612
diff
changeset
|
247 |
user_id = splitpath[4] |
9cc42981d40a
Now invited users can create a new Host profile
Sverre Rabbelier <srabbelier@gmail.com>
parents:
612
diff
changeset
|
248 |
|
525
1dc62d570eff
Created a checkIsInvited method
Sverre Rabbelier <srabbelier@gmail.com>
parents:
508
diff
changeset
|
249 |
user = user_logic.logic.getForFields( |
1dc62d570eff
Created a checkIsInvited method
Sverre Rabbelier <srabbelier@gmail.com>
parents:
508
diff
changeset
|
250 |
{'account': users.get_current_user()}, unique=True) |
293
1edd01373e71
Add an access control module
Sverre Rabbelier <srabbelier@gmail.com>
parents:
diff
changeset
|
251 |
|
617
9cc42981d40a
Now invited users can create a new Host profile
Sverre Rabbelier <srabbelier@gmail.com>
parents:
612
diff
changeset
|
252 |
if user_id != user.link_id: |
9cc42981d40a
Now invited users can create a new Host profile
Sverre Rabbelier <srabbelier@gmail.com>
parents:
612
diff
changeset
|
253 |
# TODO: perhaps this needs a better explanation? |
9cc42981d40a
Now invited users can create a new Host profile
Sverre Rabbelier <srabbelier@gmail.com>
parents:
612
diff
changeset
|
254 |
deny(request) |
9cc42981d40a
Now invited users can create a new Host profile
Sverre Rabbelier <srabbelier@gmail.com>
parents:
612
diff
changeset
|
255 |
|
525
1dc62d570eff
Created a checkIsInvited method
Sverre Rabbelier <srabbelier@gmail.com>
parents:
508
diff
changeset
|
256 |
properties = { |
617
9cc42981d40a
Now invited users can create a new Host profile
Sverre Rabbelier <srabbelier@gmail.com>
parents:
612
diff
changeset
|
257 |
'link_id': user_id, |
525
1dc62d570eff
Created a checkIsInvited method
Sverre Rabbelier <srabbelier@gmail.com>
parents:
508
diff
changeset
|
258 |
'role': role, |
617
9cc42981d40a
Now invited users can create a new Host profile
Sverre Rabbelier <srabbelier@gmail.com>
parents:
612
diff
changeset
|
259 |
'scope_path': group_id, |
9cc42981d40a
Now invited users can create a new Host profile
Sverre Rabbelier <srabbelier@gmail.com>
parents:
612
diff
changeset
|
260 |
'group_accepted': True, |
525
1dc62d570eff
Created a checkIsInvited method
Sverre Rabbelier <srabbelier@gmail.com>
parents:
508
diff
changeset
|
261 |
} |
1dc62d570eff
Created a checkIsInvited method
Sverre Rabbelier <srabbelier@gmail.com>
parents:
508
diff
changeset
|
262 |
|
1dc62d570eff
Created a checkIsInvited method
Sverre Rabbelier <srabbelier@gmail.com>
parents:
508
diff
changeset
|
263 |
request = request_logic.logic.getForFields(properties, unique=True) |
1dc62d570eff
Created a checkIsInvited method
Sverre Rabbelier <srabbelier@gmail.com>
parents:
508
diff
changeset
|
264 |
|
1dc62d570eff
Created a checkIsInvited method
Sverre Rabbelier <srabbelier@gmail.com>
parents:
508
diff
changeset
|
265 |
if request: |
293
1edd01373e71
Add an access control module
Sverre Rabbelier <srabbelier@gmail.com>
parents:
diff
changeset
|
266 |
return |
1edd01373e71
Add an access control module
Sverre Rabbelier <srabbelier@gmail.com>
parents:
diff
changeset
|
267 |
|
543
280a1ac6bcc1
Merge soc/logic/out_of_band.py into soc/views/out_of_band.py. Merge
Todd Larsen <tlarsen@google.com>
parents:
525
diff
changeset
|
268 |
raise out_of_band.LoginRequest(message_fmt=login_message_fmt) |