Mercurial > kallithea
annotate rhodecode/lib/middleware/simplegit.py @ 1275:2723276285ae beta
pep8ify middlewares
author | Marcin Kuzminski <marcin@python-works.com> |
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date | Sat, 23 Apr 2011 15:17:42 +0200 |
parents | a671db5bdd58 |
children | d6524f3025e8 |
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1 # -*- coding: utf-8 -*- |
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2 """ |
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3 rhodecode.lib.middleware.simplegit |
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4 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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5 |
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6 SimpleGit middleware for handling git protocol request (push/clone etc.) |
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7 It's implemented with basic auth function |
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8 |
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9 :created_on: Apr 28, 2010 |
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10 :author: marcink |
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11 :copyright: (C) 2009-2010 Marcin Kuzminski <marcin@python-works.com> |
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12 :license: GPLv3, see COPYING for more details. |
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13 """ |
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14 # This program is free software: you can redistribute it and/or modify |
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15 # it under the terms of the GNU General Public License as published by |
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16 # the Free Software Foundation, either version 3 of the License, or |
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17 # (at your option) any later version. |
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18 # |
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19 # This program is distributed in the hope that it will be useful, |
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20 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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21 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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22 # GNU General Public License for more details. |
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23 # |
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24 # You should have received a copy of the GNU General Public License |
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25 # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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26 |
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27 import os |
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28 import logging |
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29 import traceback |
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30 |
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31 from dulwich import server as dulserver |
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32 |
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33 |
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34 class SimpleGitUploadPackHandler(dulserver.UploadPackHandler): |
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35 |
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36 def handle(self): |
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37 write = lambda x: self.proto.write_sideband(1, x) |
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38 |
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39 graph_walker = dulserver.ProtocolGraphWalker(self, |
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40 self.repo.object_store, |
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41 self.repo.get_peeled) |
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42 objects_iter = self.repo.fetch_objects( |
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43 graph_walker.determine_wants, graph_walker, self.progress, |
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44 get_tagged=self.get_tagged) |
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45 |
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46 # Do they want any objects? |
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47 if len(objects_iter) == 0: |
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48 return |
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49 |
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50 self.progress("counting objects: %d, done.\n" % len(objects_iter)) |
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51 dulserver.write_pack_data(dulserver.ProtocolFile(None, write), |
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52 objects_iter, len(objects_iter)) |
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53 messages = [] |
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54 messages.append('thank you for using rhodecode') |
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55 |
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56 for msg in messages: |
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57 self.progress(msg + "\n") |
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58 # we are done |
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59 self.proto.write("0000") |
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60 |
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61 dulserver.DEFAULT_HANDLERS = { |
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62 'git-upload-pack': SimpleGitUploadPackHandler, |
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63 'git-receive-pack': dulserver.ReceivePackHandler, |
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64 } |
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65 |
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66 from dulwich.repo import Repo |
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67 from dulwich.web import HTTPGitApplication |
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68 |
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69 from paste.auth.basic import AuthBasicAuthenticator |
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70 from paste.httpheaders import REMOTE_USER, AUTH_TYPE |
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71 |
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72 from rhodecode.lib.auth import authfunc, HasPermissionAnyMiddleware |
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73 from rhodecode.lib.utils import invalidate_cache, check_repo_fast |
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74 from rhodecode.model.user import UserModel |
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75 |
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76 from webob.exc import HTTPNotFound, HTTPForbidden, HTTPInternalServerError |
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77 |
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78 log = logging.getLogger(__name__) |
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79 |
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80 |
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81 def is_git(environ): |
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82 """Returns True if request's target is git server. |
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83 ``HTTP_USER_AGENT`` would then have git client version given. |
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84 |
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85 :param environ: |
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86 """ |
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87 http_user_agent = environ.get('HTTP_USER_AGENT') |
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88 if http_user_agent and http_user_agent.startswith('git'): |
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89 return True |
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90 return False |
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91 |
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92 |
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93 class SimpleGit(object): |
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94 |
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95 def __init__(self, application, config): |
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96 self.application = application |
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97 self.config = config |
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98 #authenticate this git request using |
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99 self.authenticate = AuthBasicAuthenticator('', authfunc) |
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100 self.ipaddr = '0.0.0.0' |
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101 self.repository = None |
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102 self.username = None |
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103 self.action = None |
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104 |
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105 def __call__(self, environ, start_response): |
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106 if not is_git(environ): |
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107 return self.application(environ, start_response) |
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108 |
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109 proxy_key = 'HTTP_X_REAL_IP' |
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110 def_key = 'REMOTE_ADDR' |
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111 self.ipaddr = environ.get(proxy_key, environ.get(def_key, '0.0.0.0')) |
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112 # skip passing error to error controller |
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113 environ['pylons.status_code_redirect'] = True |
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114 |
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115 #====================================================================== |
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116 # GET ACTION PULL or PUSH |
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117 #====================================================================== |
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118 self.action = self.__get_action(environ) |
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119 try: |
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120 #================================================================== |
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121 # GET REPOSITORY NAME |
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122 #================================================================== |
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123 self.repo_name = self.__get_repository(environ) |
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124 except: |
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125 return HTTPInternalServerError()(environ, start_response) |
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126 |
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127 #====================================================================== |
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128 # CHECK ANONYMOUS PERMISSION |
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129 #====================================================================== |
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130 if self.action in ['pull', 'push'] or self.action: |
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131 anonymous_user = self.__get_user('default') |
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132 self.username = anonymous_user.username |
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133 anonymous_perm = self.__check_permission(self.action, |
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134 anonymous_user, |
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135 self.repo_name) |
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136 |
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137 if anonymous_perm is not True or anonymous_user.active is False: |
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138 if anonymous_perm is not True: |
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139 log.debug('Not enough credentials to access this ' |
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140 'repository as anonymous user') |
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141 if anonymous_user.active is False: |
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142 log.debug('Anonymous access is disabled, running ' |
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143 'authentication') |
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144 #============================================================== |
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145 # DEFAULT PERM FAILED OR ANONYMOUS ACCESS IS DISABLED SO WE |
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146 # NEED TO AUTHENTICATE AND ASK FOR AUTH USER PERMISSIONS |
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147 #============================================================== |
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148 |
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149 if not REMOTE_USER(environ): |
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150 self.authenticate.realm = str( |
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151 self.config['rhodecode_realm']) |
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152 result = self.authenticate(environ) |
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153 if isinstance(result, str): |
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154 AUTH_TYPE.update(environ, 'basic') |
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155 REMOTE_USER.update(environ, result) |
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156 else: |
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157 return result.wsgi_application(environ, start_response) |
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158 |
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159 #============================================================== |
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160 # CHECK PERMISSIONS FOR THIS REQUEST USING GIVEN USERNAME FROM |
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161 # BASIC AUTH |
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162 #============================================================== |
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163 |
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164 if self.action in ['pull', 'push'] or self.action: |
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165 username = REMOTE_USER(environ) |
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166 try: |
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167 user = self.__get_user(username) |
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168 self.username = user.username |
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169 except: |
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170 log.error(traceback.format_exc()) |
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171 return HTTPInternalServerError()(environ, |
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172 start_response) |
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173 |
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174 #check permissions for this repository |
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175 perm = self.__check_permission(self.action, user, |
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176 self.repo_name) |
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177 if perm is not True: |
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178 print 'not allowed' |
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179 return HTTPForbidden()(environ, start_response) |
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180 |
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181 self.extras = {'ip': self.ipaddr, |
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182 'username': self.username, |
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183 'action': self.action, |
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184 'repository': self.repo_name} |
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185 |
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186 #=================================================================== |
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187 # GIT REQUEST HANDLING |
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188 #=================================================================== |
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189 self.basepath = self.config['base_path'] |
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190 self.repo_path = os.path.join(self.basepath, self.repo_name) |
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191 #quick check if that dir exists... |
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192 if check_repo_fast(self.repo_name, self.basepath): |
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193 return HTTPNotFound()(environ, start_response) |
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194 try: |
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195 app = self.__make_app() |
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196 except: |
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197 log.error(traceback.format_exc()) |
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198 return HTTPInternalServerError()(environ, start_response) |
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199 |
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200 #invalidate cache on push |
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201 if self.action == 'push': |
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202 self.__invalidate_cache(self.repo_name) |
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203 messages = [] |
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204 messages.append('thank you for using rhodecode') |
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205 return app(environ, start_response) |
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206 else: |
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207 return app(environ, start_response) |
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208 |
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209 def __make_app(self): |
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210 _d = {'/' + self.repo_name: Repo(self.repo_path)} |
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211 backend = dulserver.DictBackend(_d) |
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212 gitserve = HTTPGitApplication(backend) |
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213 |
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214 return gitserve |
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215 |
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216 def __check_permission(self, action, user, repo_name): |
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217 """Checks permissions using action (push/pull) user and repository |
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218 name |
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219 |
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220 :param action: push or pull action |
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221 :param user: user instance |
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222 :param repo_name: repository name |
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223 """ |
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224 if action == 'push': |
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225 if not HasPermissionAnyMiddleware('repository.write', |
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226 'repository.admin')(user, |
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227 repo_name): |
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228 return False |
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229 |
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230 else: |
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231 #any other action need at least read permission |
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232 if not HasPermissionAnyMiddleware('repository.read', |
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233 'repository.write', |
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234 'repository.admin')(user, |
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235 repo_name): |
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236 return False |
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237 |
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238 return True |
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239 |
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240 def __get_repository(self, environ): |
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241 """Get's repository name out of PATH_INFO header |
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242 |
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243 :param environ: environ where PATH_INFO is stored |
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244 """ |
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245 try: |
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246 repo_name = '/'.join(environ['PATH_INFO'].split('/')[1:]) |
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247 if repo_name.endswith('/'): |
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248 repo_name = repo_name.rstrip('/') |
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249 except: |
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250 log.error(traceback.format_exc()) |
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251 raise |
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252 repo_name = repo_name.split('/')[0] |
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253 return repo_name |
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254 |
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255 def __get_user(self, username): |
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256 return UserModel().get_by_username(username, cache=True) |
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257 |
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258 def __get_action(self, environ): |
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259 """Maps git request commands into a pull or push command. |
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260 |
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261 :param environ: |
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262 """ |
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263 service = environ['QUERY_STRING'].split('=') |
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264 if len(service) > 1: |
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265 service_cmd = service[1] |
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266 mapping = {'git-receive-pack': 'push', |
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267 'git-upload-pack': 'pull', |
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268 } |
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269 |
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270 return mapping.get(service_cmd, |
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271 service_cmd if service_cmd else 'other') |
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272 else: |
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273 return 'other' |
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274 |
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275 def __invalidate_cache(self, repo_name): |
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276 """we know that some change was made to repositories and we should |
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277 invalidate the cache to see the changes right away but only for |
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278 push requests""" |
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279 invalidate_cache('get_repo_cached_%s' % repo_name) |