Mercurial > kallithea
annotate pylons_app/lib/auth.py @ 417:3ed2d46a2ca7
permission refactoring,
Implemented views for default permissions,
fixes #23 user registration is controlled by permission system.
Implemented manual registration option
websetup fills default permissions
author | Marcin Kuzminski <marcin@python-works.com> |
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date | Sat, 21 Aug 2010 16:34:37 +0200 |
parents | 04e8b31fb245 |
children | 63c697d1a631 |
rev | line source |
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1 #!/usr/bin/env python |
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2 # encoding: utf-8 |
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3 # authentication and permission libraries |
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4 # Copyright (C) 2009-2010 Marcin Kuzminski <marcin@python-works.com> |
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5 # |
252
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6 # This program is free software; you can redistribute it and/or |
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7 # modify it under the terms of the GNU General Public License |
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8 # as published by the Free Software Foundation; version 2 |
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9 # of the License or (at your opinion) any later version of the license. |
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10 # |
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11 # This program is distributed in the hope that it will be useful, |
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 # GNU General Public License for more details. |
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15 # |
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16 # You should have received a copy of the GNU General Public License |
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17 # along with this program; if not, write to the Free Software |
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18 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
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19 # MA 02110-1301, USA. |
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20 """ |
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21 Created on April 4, 2010 |
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22 |
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23 @author: marcink |
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24 """ |
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25 from beaker.cache import cache_region |
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26 from pylons import config, session, url, request |
52 | 27 from pylons.controllers.util import abort, redirect |
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28 from pylons_app.lib.utils import get_repo_slug |
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29 from pylons_app.model import meta |
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30 from pylons_app.model.db import User, RepoToPerm, Repository, Permission, \ |
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31 UserToPerm |
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32 from sqlalchemy.exc import OperationalError |
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33 from sqlalchemy.orm.exc import NoResultFound, MultipleResultsFound |
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34 import bcrypt |
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35 from decorator import decorator |
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36 import logging |
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37 |
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38 log = logging.getLogger(__name__) |
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39 |
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40 def get_crypt_password(password): |
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41 """Cryptographic function used for password hashing based on sha1 |
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42 @param password: password to hash |
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43 """ |
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44 return bcrypt.hashpw(password, bcrypt.gensalt(10)) |
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45 |
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46 def check_password(password, hashed): |
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47 return bcrypt.hashpw(password, hashed) == hashed |
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48 |
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49 @cache_region('super_short_term', 'cached_user') |
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50 def get_user_cached(username): |
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51 sa = meta.Session |
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52 try: |
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53 user = sa.query(User).filter(User.username == username).one() |
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54 finally: |
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55 meta.Session.remove() |
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56 return user |
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57 |
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58 def authfunc(environ, username, password): |
42 | 59 try: |
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60 user = get_user_cached(username) |
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61 except (NoResultFound, MultipleResultsFound, OperationalError) as e: |
42 | 62 log.error(e) |
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63 user = None |
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64 |
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65 if user: |
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66 if user.active: |
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67 if user.username == username and check_password(password, user.password): |
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68 log.info('user %s authenticated correctly', username) |
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69 return True |
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70 else: |
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71 log.error('user %s is disabled', username) |
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72 |
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73 return False |
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74 |
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75 class AuthUser(object): |
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76 """ |
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77 A simple object that handles a mercurial username for authentication |
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78 """ |
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79 def __init__(self): |
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80 self.username = 'None' |
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81 self.name = '' |
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82 self.lastname = '' |
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83 self.email = '' |
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84 self.user_id = None |
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85 self.is_authenticated = False |
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86 self.is_admin = False |
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87 self.permissions = {} |
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88 |
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89 |
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90 def set_available_permissions(config): |
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91 """ |
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92 This function will propagate pylons globals with all available defined |
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93 permission given in db. We don't wannt to check each time from db for new |
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94 permissions since adding a new permission also requires application restart |
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95 ie. to decorate new views with the newly created permission |
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96 @param config: |
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97 """ |
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98 log.info('getting information about all available permissions') |
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99 try: |
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100 sa = meta.Session |
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101 all_perms = sa.query(Permission).all() |
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102 finally: |
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103 meta.Session.remove() |
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104 |
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105 config['available_permissions'] = [x.permission_name for x in all_perms] |
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106 |
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107 def set_base_path(config): |
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108 config['base_path'] = config['pylons.app_globals'].base_path |
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109 |
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110 def fill_data(user): |
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111 """ |
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112 Fills user data with those from database and log out user if not present |
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113 in database |
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114 @param user: |
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115 """ |
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116 sa = meta.Session |
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117 dbuser = sa.query(User).get(user.user_id) |
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118 if dbuser: |
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119 user.username = dbuser.username |
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120 user.is_admin = dbuser.admin |
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121 user.name = dbuser.name |
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122 user.lastname = dbuser.lastname |
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123 user.email = dbuser.email |
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124 else: |
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125 user.is_authenticated = False |
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126 meta.Session.remove() |
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127 return user |
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128 |
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129 def fill_perms(user): |
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130 """ |
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131 Fills user permission attribute with permissions taken from database |
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132 @param user: |
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133 """ |
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134 |
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135 sa = meta.Session |
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136 user.permissions['repositories'] = {} |
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137 user.permissions['global'] = set() |
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138 |
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139 #=========================================================================== |
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140 # fetch default permissions |
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141 #=========================================================================== |
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142 default_perms = sa.query(RepoToPerm, UserToPerm, Repository, Permission)\ |
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143 .outerjoin((UserToPerm, RepoToPerm.user_id == UserToPerm.user_id))\ |
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144 .join((Repository, RepoToPerm.repository_id == Repository.repo_id))\ |
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145 .join((Permission, RepoToPerm.permission_id == Permission.permission_id))\ |
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146 .filter(RepoToPerm.user_id == sa.query(User).filter(User.username == |
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147 'default').one().user_id).all() |
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148 |
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149 if user.is_admin: |
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150 #======================================================================= |
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151 # #admin have all rights set to admin |
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152 #======================================================================= |
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153 user.permissions['global'].add('hg.admin') |
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154 |
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155 for perm in default_perms: |
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156 p = 'repository.admin' |
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157 user.permissions['repositories'][perm.RepoToPerm.repository.repo_name] = p |
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158 |
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159 else: |
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160 #======================================================================= |
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161 # set default permissions |
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162 #======================================================================= |
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163 |
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164 #default global |
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165 for perm in default_perms: |
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166 user.permissions['global'].add(perm.UserToPerm.permission.permission_name) |
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167 |
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168 # user.permissions['global'].add('hg.create.repository') |
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169 # user.permissions['global'].add('hg.register') |
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170 |
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171 #default repositories |
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172 for perm in default_perms: |
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173 if perm.Repository.private and not perm.Repository.user_id == user.user_id: |
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174 #disable defaults for private repos, |
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175 p = 'repository.none' |
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176 elif perm.Repository.user_id == user.user_id: |
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177 #set admin if owner |
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178 p = 'repository.admin' |
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179 else: |
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180 p = perm.Permission.permission_name |
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181 |
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182 user.permissions['repositories'][perm.RepoToPerm.repository.repo_name] = p |
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183 |
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184 #======================================================================= |
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185 # #overwrite default with user permissions if any |
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186 #======================================================================= |
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187 user_perms = sa.query(RepoToPerm, UserToPerm, Permission, Repository)\ |
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188 .outerjoin((UserToPerm, RepoToPerm.user_id == UserToPerm.user_id))\ |
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189 .join((Repository, RepoToPerm.repository_id == Repository.repo_id))\ |
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190 .join((Permission, RepoToPerm.permission_id == Permission.permission_id))\ |
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191 .filter(RepoToPerm.user_id == user.user_id).all() |
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192 |
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193 for perm in user_perms: |
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194 if perm.Repository.user_id == user.user_id:#set admin if owner |
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195 p = 'repository.admin' |
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196 else: |
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197 p = perm.Permission.permission_name |
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198 user.permissions['repositories'][perm.RepoToPerm.repository.repo_name] = p |
350
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199 meta.Session.remove() |
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200 return user |
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201 |
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202 def get_user(session): |
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203 """ |
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204 Gets user from session, and wraps permissions into user |
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205 @param session: |
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206 """ |
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207 user = session.get('hg_app_user', AuthUser()) |
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208 if user.is_authenticated: |
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209 user = fill_data(user) |
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210 user = fill_perms(user) |
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211 session['hg_app_user'] = user |
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212 session.save() |
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213 return user |
239
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214 |
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215 #=============================================================================== |
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216 # CHECK DECORATORS |
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217 #=============================================================================== |
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218 class LoginRequired(object): |
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219 """Must be logged in to execute this function else redirect to login page""" |
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220 |
190
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221 def __call__(self, func): |
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222 return decorator(self.__wrapper, func) |
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223 |
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224 def __wrapper(self, func, *fargs, **fkwargs): |
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225 user = session.get('hg_app_user', AuthUser()) |
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226 log.debug('Checking login required for user:%s', user.username) |
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227 if user.is_authenticated: |
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228 log.debug('user %s is authenticated', user.username) |
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229 return func(*fargs, **fkwargs) |
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230 else: |
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231 log.warn('user %s not authenticated', user.username) |
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232 log.debug('redirecting to login page') |
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233 return redirect(url('login_home')) |
239
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234 |
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235 class PermsDecorator(object): |
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236 """Base class for decorators""" |
239
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237 |
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238 def __init__(self, *required_perms): |
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239 available_perms = config['available_permissions'] |
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240 for perm in required_perms: |
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241 if perm not in available_perms: |
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242 raise Exception("'%s' permission is not defined" % perm) |
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243 self.required_perms = set(required_perms) |
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244 self.user_perms = None |
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245 |
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246 def __call__(self, func): |
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247 return decorator(self.__wrapper, func) |
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248 |
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249 |
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250 def __wrapper(self, func, *fargs, **fkwargs): |
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251 # _wrapper.__name__ = func.__name__ |
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252 # _wrapper.__dict__.update(func.__dict__) |
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253 # _wrapper.__doc__ = func.__doc__ |
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254 |
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255 self.user_perms = session.get('hg_app_user', AuthUser()).permissions |
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256 log.debug('checking %s permissions %s for %s', |
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257 self.__class__.__name__, self.required_perms, func.__name__) |
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258 |
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259 if self.check_permissions(): |
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260 log.debug('Permission granted for %s', func.__name__) |
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261 |
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262 return func(*fargs, **fkwargs) |
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263 |
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264 else: |
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265 log.warning('Permission denied for %s', func.__name__) |
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266 #redirect with forbidden ret code |
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267 return abort(403) |
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268 |
239
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269 |
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270 |
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271 def check_permissions(self): |
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272 """Dummy function for overriding""" |
239
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273 raise Exception('You have to write this function in child class') |
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274 |
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275 class HasPermissionAllDecorator(PermsDecorator): |
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276 """Checks for access permission for all given predicates. All of them |
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277 have to be meet in order to fulfill the request |
239
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278 """ |
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279 |
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280 def check_permissions(self): |
339
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281 if self.required_perms.issubset(self.user_perms.get('global')): |
239
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282 return True |
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283 return False |
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284 |
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285 |
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286 class HasPermissionAnyDecorator(PermsDecorator): |
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287 """Checks for access permission for any of given predicates. In order to |
239
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288 fulfill the request any of predicates must be meet |
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289 """ |
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290 |
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291 def check_permissions(self): |
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292 if self.required_perms.intersection(self.user_perms.get('global')): |
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293 return True |
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294 return False |
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295 |
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296 class HasRepoPermissionAllDecorator(PermsDecorator): |
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297 """Checks for access permission for all given predicates for specific |
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298 repository. All of them have to be meet in order to fulfill the request |
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299 """ |
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300 |
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301 def check_permissions(self): |
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302 repo_name = get_repo_slug(request) |
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303 try: |
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304 user_perms = set([self.user_perms['repositories'][repo_name]]) |
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305 except KeyError: |
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306 return False |
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307 if self.required_perms.issubset(user_perms): |
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308 return True |
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309 return False |
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310 |
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311 |
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312 class HasRepoPermissionAnyDecorator(PermsDecorator): |
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313 """Checks for access permission for any of given predicates for specific |
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314 repository. In order to fulfill the request any of predicates must be meet |
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315 """ |
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316 |
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317 def check_permissions(self): |
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318 repo_name = get_repo_slug(request) |
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319 |
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320 try: |
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321 user_perms = set([self.user_perms['repositories'][repo_name]]) |
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322 except KeyError: |
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323 return False |
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324 if self.required_perms.intersection(user_perms): |
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325 return True |
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326 return False |
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327 #=============================================================================== |
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328 # CHECK FUNCTIONS |
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329 #=============================================================================== |
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330 |
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331 class PermsFunction(object): |
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332 """Base function for other check functions""" |
316
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333 |
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334 def __init__(self, *perms): |
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335 available_perms = config['available_permissions'] |
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336 |
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337 for perm in perms: |
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338 if perm not in available_perms: |
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339 raise Exception("'%s' permission in not defined" % perm) |
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340 self.required_perms = set(perms) |
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341 self.user_perms = None |
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342 self.granted_for = '' |
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343 self.repo_name = None |
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344 |
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345 def __call__(self, check_Location=''): |
333 | 346 user = session.get('hg_app_user', False) |
347 if not user: | |
348 return False | |
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349 self.user_perms = user.permissions |
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350 self.granted_for = user.username |
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351 log.debug('checking %s %s', self.__class__.__name__, self.required_perms) |
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352 |
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353 if self.check_permissions(): |
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354 log.debug('Permission granted for %s @%s', self.granted_for, |
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355 check_Location) |
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356 return True |
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357 |
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358 else: |
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359 log.warning('Permission denied for %s @%s', self.granted_for, |
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360 check_Location) |
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361 return False |
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362 |
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363 def check_permissions(self): |
377
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364 """Dummy function for overriding""" |
316
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365 raise Exception('You have to write this function in child class') |
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366 |
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367 class HasPermissionAll(PermsFunction): |
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368 def check_permissions(self): |
339
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369 if self.required_perms.issubset(self.user_perms.get('global')): |
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370 return True |
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371 return False |
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372 |
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373 class HasPermissionAny(PermsFunction): |
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374 def check_permissions(self): |
339
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375 if self.required_perms.intersection(self.user_perms.get('global')): |
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376 return True |
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377 return False |
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378 |
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379 class HasRepoPermissionAll(PermsFunction): |
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380 |
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381 def __call__(self, repo_name=None, check_Location=''): |
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382 self.repo_name = repo_name |
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383 return super(HasRepoPermissionAll, self).__call__(check_Location) |
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384 |
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385 def check_permissions(self): |
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386 if not self.repo_name: |
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387 self.repo_name = get_repo_slug(request) |
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388 |
339
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389 try: |
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390 self.user_perms = set([self.user_perms['repositories']\ |
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391 [self.repo_name]]) |
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392 except KeyError: |
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393 return False |
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394 self.granted_for = self.repo_name |
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395 if self.required_perms.issubset(self.user_perms): |
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396 return True |
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397 return False |
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398 |
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399 class HasRepoPermissionAny(PermsFunction): |
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400 |
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401 def __call__(self, repo_name=None, check_Location=''): |
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402 self.repo_name = repo_name |
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403 return super(HasRepoPermissionAny, self).__call__(check_Location) |
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404 |
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405 def check_permissions(self): |
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406 if not self.repo_name: |
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407 self.repo_name = get_repo_slug(request) |
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408 |
339
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409 try: |
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410 self.user_perms = set([self.user_perms['repositories']\ |
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411 [self.repo_name]]) |
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412 except KeyError: |
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413 return False |
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414 self.granted_for = self.repo_name |
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415 if self.required_perms.intersection(self.user_perms): |
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416 return True |
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417 return False |
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418 |
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419 #=============================================================================== |
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420 # SPECIAL VERSION TO HANDLE MIDDLEWARE AUTH |
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421 #=============================================================================== |
239
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422 |
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423 class HasPermissionAnyMiddleware(object): |
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424 def __init__(self, *perms): |
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425 self.required_perms = set(perms) |
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426 |
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427 def __call__(self, user, repo_name): |
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428 usr = AuthUser() |
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429 usr.user_id = user.user_id |
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430 usr.username = user.username |
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431 usr.is_admin = user.admin |
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432 |
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433 try: |
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434 self.user_perms = set([fill_perms(usr)\ |
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435 .permissions['repositories'][repo_name]]) |
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436 except: |
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437 self.user_perms = set() |
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438 self.granted_for = '' |
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439 self.username = user.username |
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440 self.repo_name = repo_name |
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441 return self.check_permissions() |
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442 |
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443 def check_permissions(self): |
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444 log.debug('checking mercurial protocol ' |
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445 'permissions for user:%s repository:%s', |
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446 self.username, self.repo_name) |
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447 if self.required_perms.intersection(self.user_perms): |
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448 log.debug('permission granted') |
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449 return True |
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450 log.debug('permission denied') |
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451 return False |