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annotate rhodecode/lib/middleware/simplehg.py @ 903:04c9bb9ca6d6 beta

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code docs, updates
author Marcin Kuzminski <marcin@python-works.com>
date Fri, 31 Dec 2010 19:58:43 +0100
parents 07a6e8c65526
children 811fa5d45de8
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rev   line source
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1 # -*- coding: utf-8 -*-
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2 """
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3 rhodecode.lib.middleware.simplehg
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4 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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5
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6 SimpleHG middleware for handling mercurial protocol request
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7 (push/clone etc.). 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 """
252
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14 # This program is free software; you can redistribute it and/or
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15 # modify it under the terms of the GNU General Public License
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16 # as published by the Free Software Foundation; version 2
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17 # of the License or (at your opinion) any later version of the license.
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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, write to the Free Software
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26 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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27 # MA 02110-1301, USA.
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28
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29 from mercurial.error import RepoError
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30 from mercurial.hgweb import hgweb
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31 from mercurial.hgweb.request import wsgiapplication
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32 from paste.auth.basic import AuthBasicAuthenticator
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33 from paste.httpheaders import REMOTE_USER, AUTH_TYPE
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34 from rhodecode.lib.auth import authfunc, HasPermissionAnyMiddleware
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35 from rhodecode.lib.utils import make_ui, invalidate_cache, \
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36 check_repo_fast, ui_sections
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37 from rhodecode.model.user import UserModel
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38 from webob.exc import HTTPNotFound, HTTPForbidden, HTTPInternalServerError
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39 import logging
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40 import os
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41 import traceback
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42
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43 log = logging.getLogger(__name__)
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44
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45 def is_mercurial(environ):
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46 """Returns True if request's target is mercurial server - header
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47 ``HTTP_ACCEPT`` of such request would start with ``application/mercurial``.
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48 """
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49 http_accept = environ.get('HTTP_ACCEPT')
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50 if http_accept and http_accept.startswith('application/mercurial'):
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51 return True
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52 return False
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53
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54 class SimpleHg(object):
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55
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56 def __init__(self, application, config):
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57 self.application = application
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58 self.config = config
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59 #authenticate this mercurial request using authfunc
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60 self.authenticate = AuthBasicAuthenticator('', authfunc)
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61 self.ipaddr = '0.0.0.0'
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62 self.repository = None
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63 self.username = None
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64 self.action = None
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65
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66 def __call__(self, environ, start_response):
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67 if not is_mercurial(environ):
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68 return self.application(environ, start_response)
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69
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70 proxy_key = 'HTTP_X_REAL_IP'
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71 def_key = 'REMOTE_ADDR'
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72 self.ipaddr = environ.get(proxy_key, environ.get(def_key, '0.0.0.0'))
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73 # skip passing error to error controller
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74 environ['pylons.status_code_redirect'] = True
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75 #===================================================================
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76 # AUTHENTICATE THIS MERCURIAL REQUEST
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77 #===================================================================
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78 username = REMOTE_USER(environ)
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79
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80 if not username:
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81 self.authenticate.realm = self.config['rhodecode_realm']
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82 result = self.authenticate(environ)
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83 if isinstance(result, str):
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84 AUTH_TYPE.update(environ, 'basic')
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85 REMOTE_USER.update(environ, result)
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86 else:
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87 return result.wsgi_application(environ, start_response)
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88
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89 #=======================================================================
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90 # GET REPOSITORY
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91 #=======================================================================
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92 try:
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93 repo_name = '/'.join(environ['PATH_INFO'].split('/')[1:])
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94 if repo_name.endswith('/'):
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95 repo_name = repo_name.rstrip('/')
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96 self.repository = repo_name
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97 except:
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98 log.error(traceback.format_exc())
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99 return HTTPInternalServerError()(environ, start_response)
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100
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101 #===================================================================
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102 # CHECK PERMISSIONS FOR THIS REQUEST
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103 #===================================================================
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104 self.action = self.__get_action(environ)
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105 if self.action:
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106 username = self.__get_environ_user(environ)
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107 try:
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108 user = self.__get_user(username)
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109 self.username = user.username
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110 except:
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111 log.error(traceback.format_exc())
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112 return HTTPInternalServerError()(environ, start_response)
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113
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114 #check permissions for this repository
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115 if self.action == 'push':
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116 if not HasPermissionAnyMiddleware('repository.write',
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117 'repository.admin')\
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118 (user, repo_name):
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119 return HTTPForbidden()(environ, start_response)
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120
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121 else:
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122 #any other action need at least read permission
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123 if not HasPermissionAnyMiddleware('repository.read',
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124 'repository.write',
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125 'repository.admin')\
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126 (user, repo_name):
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127 return HTTPForbidden()(environ, start_response)
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128
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129 self.extras = {'ip':self.ipaddr,
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130 'username':self.username,
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131 'action':self.action,
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132 'repository':self.repository}
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133
343
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134 #===================================================================
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135 # MERCURIAL REQUEST HANDLING
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136 #===================================================================
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137 environ['PATH_INFO'] = '/'#since we wrap into hgweb, reset the path
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138 self.baseui = make_ui('db')
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139 self.basepath = self.config['base_path']
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140 self.repo_path = os.path.join(self.basepath, repo_name)
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141
343
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142 #quick check if that dir exists...
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143 if check_repo_fast(repo_name, self.basepath):
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144 return HTTPNotFound()(environ, start_response)
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145 try:
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146 app = wsgiapplication(self.__make_app)
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147 except RepoError, e:
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148 if str(e).find('not found') != -1:
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149 return HTTPNotFound()(environ, start_response)
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150 except Exception:
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151 log.error(traceback.format_exc())
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152 return HTTPInternalServerError()(environ, start_response)
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153
343
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154 #invalidate cache on push
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155 if self.action == 'push':
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156 self.__invalidate_cache(repo_name)
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157
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158 return app(environ, start_response)
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159
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160
197
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161 def __make_app(self):
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162 hgserve = hgweb(str(self.repo_path), baseui=self.baseui)
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163 return self.__load_web_settings(hgserve, self.extras)
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164
197
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165 def __get_environ_user(self, environ):
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166 return environ.get('REMOTE_USER')
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167
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168 def __get_user(self, username):
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169 return UserModel().get_by_username(username, cache=True)
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170
197
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171 def __get_action(self, environ):
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172 """Maps mercurial request commands into a clone,pull or push command.
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173 This should always return a valid command string
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174 :param environ:
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175 """
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176 mapping = {'changegroup': 'pull',
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177 'changegroupsubset': 'pull',
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178 'stream_out': 'pull',
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179 'listkeys': 'pull',
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180 'unbundle': 'push',
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181 'pushkey': 'push', }
197
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182 for qry in environ['QUERY_STRING'].split('&'):
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183 if qry.startswith('cmd'):
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184 cmd = qry.split('=')[-1]
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185 if mapping.has_key(cmd):
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186 return mapping[cmd]
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187 else:
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188 return cmd
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189
197
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190 def __invalidate_cache(self, repo_name):
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191 """we know that some change was made to repositories and we should
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192 invalidate the cache to see the changes right away but only for
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193 push requests"""
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194 invalidate_cache('get_repo_cached_%s' % repo_name)
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195
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196
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197 def __load_web_settings(self, hgserve, extras={}):
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198 #set the global ui for hgserve instance passed
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199 hgserve.repo.ui = self.baseui
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200
341
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201 hgrc = os.path.join(self.repo_path, '.hg', 'hgrc')
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202
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203 #inject some additional parameters that will be available in ui
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204 #for hooks
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205 for k, v in extras.items():
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206 hgserve.repo.ui.setconfig('rhodecode_extras', k, v)
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207
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208 repoui = make_ui('file', hgrc, False)
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209
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210 if repoui:
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211 #overwrite our ui instance with the section from hgrc file
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212 for section in ui_sections:
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213 for k, v in repoui.configitems(section):
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214 hgserve.repo.ui.setconfig(section, k, v)
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215
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216 return hgserve