annotate MoinMoin/app.py @ 0:5568cf133caf moin20-repo-reboot

create moin/2.0 repo, drop all history (see notes below) Up to now, we used the moin/2.0-dev repository (which was cloned from another, older moin repo quite some time ago). Over the years, these repositories got rather fat (>200MB) and were a pain to clone over slow, high-latency or unreliable connections. After having finished most of the dirty work in moin2, having killed all the 3rd party code we had bundled with (is now installed by quickinstall / pip / setuptools), it is now a good time to get rid of the history (the history made up most of the repository's size). If you need to look at the history, look there: http://hg.moinmo.in/moin/2.0-dev The new moin/2.0 repository has the files as of this changesets: http://hg.moinmo.in/moin/2.0-dev/rev/075132a755dc The changeset hashes that link the repositories will be tagged (in both repositories) as "moin20-repo-reboot".
author Thomas Waldmann <tw AT waldmann-edv DOT de>
date Sun, 20 Feb 2011 20:53:45 +0100
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children fe47d0977895
rev   line source
0
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1 # -*- coding: ascii -*-
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2 """
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3 MoinMoin - wsgi application setup and related code
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4
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5 Use create_app(config) to create the WSGI application (using Flask).
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6
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7 @copyright: 2000-2006 by Juergen Hermann <jh@web.de>,
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8 2002-2011 MoinMoin:ThomasWaldmann,
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9 2008 MoinMoin:FlorianKrupicka,
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10 2010 MoinMoin:DiogenesAugusto
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11 @license: GNU GPL, see COPYING for details.
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12 """
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13 import os
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14
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15 # do this early, but not in MoinMoin/__init__.py because we need to be able to
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16 # "import MoinMoin" from setup.py even before flask, werkzeug, ... is installed.
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17 from MoinMoin.util import monkeypatch
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18
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19 from flask import Flask, request, session, flaskg
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20 from flask import current_app as app
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21
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22 from flaskext.cache import Cache
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23 from flaskext.themes import setup_themes
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24
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25 from werkzeug.exceptions import HTTPException
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26
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27 from jinja2 import ChoiceLoader, FileSystemLoader
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28
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29 from MoinMoin import log
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30 logging = log.getLogger(__name__)
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31
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32 from MoinMoin.i18n import i18n_init
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33 from MoinMoin.i18n import _, L_, N_
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34
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35 from MoinMoin.themes import setup_jinja_env, themed_error
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36
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37 def create_app(config=None):
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38 """simple wrapper around create_app_ext() for flask-script"""
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39 return create_app_ext(flask_config_file=config)
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40
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41
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42 def create_app_ext(flask_config_file=None, flask_config_dict=None,
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43 moin_config_class=None, warn_default=True, **kwargs
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44 ):
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45 """
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46 Factory for moin wsgi apps
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47
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48 @param flask_config_file: a flask config file name (may have a MOINCFG class),
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49 if not given, a config pointed to by MOINCFG env var
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50 will be loaded (if possible).
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51 @param flask_config_dict: a dict used to update flask config (applied after
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52 flask_config_file was loaded [if given])
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53 @param moin_config_class: if you give this, it'll be instantiated as app.cfg,
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54 otherwise it'll use MOINCFG from flask config. If that
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55 also is not there, it'll use the DefaultConfig built
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56 into MoinMoin.
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57 @oaram warn_default: emit a warning if moin falls back to its builtin default
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58 config (maybe user forgot to specify MOINCFG?)
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59 @param **kwargs: if you give additional key/values here, they'll get patched
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60 into the moin configuration class (before it instance is created)
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61 """
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62 clock = Clock()
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63 clock.start('create_app total')
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64 app = Flask('MoinMoin')
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65 clock.start('create_app load config')
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66 if flask_config_file:
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67 app.config.from_pyfile(flask_config_file)
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68 else:
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69 app.config.from_envvar('MOINCFG', silent=True)
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70 if flask_config_dict:
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71 app.config.update(flask_config_dict)
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72 Config = moin_config_class
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73 if not Config:
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74 Config = app.config.get('MOINCFG')
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75 if not Config:
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76 if warn_default:
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77 logging.warning("using builtin default configuration")
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78 from MoinMoin.config.default import DefaultConfig as Config
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79 for key, value in kwargs.iteritems():
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80 setattr(Config, key, value)
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81 if Config.secrets is None:
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82 # reuse the secret configured for flask (which is required for sessions)
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83 Config.secrets = app.config.get('SECRET_KEY')
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84 app.cfg = Config()
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85 clock.stop('create_app load config')
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86 clock.start('create_app register')
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87 # register converters
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88 from werkzeug.routing import PathConverter
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89 app.url_map.converters['itemname'] = PathConverter
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90 # register modules, before/after request functions
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91 from MoinMoin.apps.frontend import frontend
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92 frontend.before_request(before_wiki)
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93 frontend.after_request(after_wiki)
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94 app.register_module(frontend)
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95 from MoinMoin.apps.admin import admin
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96 admin.before_request(before_wiki)
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97 admin.after_request(after_wiki)
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98 app.register_module(admin, url_prefix='/+admin')
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99 from MoinMoin.apps.feed import feed
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100 feed.before_request(before_wiki)
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101 feed.after_request(after_wiki)
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102 app.register_module(feed, url_prefix='/+feed')
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103 from MoinMoin.apps.misc import misc
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104 misc.before_request(before_wiki)
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105 misc.after_request(after_wiki)
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106 app.register_module(misc, url_prefix='/+misc')
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107 from MoinMoin.apps.serve import serve
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108 app.register_module(serve, url_prefix='/+serve')
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109 clock.stop('create_app register')
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110 clock.start('create_app flask-cache')
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111 cache = Cache()
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112 cache.init_app(app)
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113 app.cache = cache
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114 clock.stop('create_app flask-cache')
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115 # init storage
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116 clock.start('create_app init backends')
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117 app.unprotected_storage, app.storage = init_backends(app)
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118 clock.stop('create_app init backends')
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119 clock.start('create_app index rebuild')
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120 if app.cfg.index_rebuild:
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121 app.unprotected_storage.index_rebuild() # XXX run this from a script
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122 clock.stop('create_app index rebuild')
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123 clock.start('create_app load/save xml')
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124 import_export_xml(app)
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125 clock.stop('create_app load/save xml')
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126 clock.start('create_app flask-babel')
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127 i18n_init(app)
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128 clock.stop('create_app flask-babel')
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129 # configure templates
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130 clock.start('create_app flask-themes')
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131 setup_themes(app)
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132 if app.cfg.template_dirs:
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133 app.jinja_env.loader = ChoiceLoader([
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134 FileSystemLoader(app.cfg.template_dirs),
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135 app.jinja_env.loader,
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136 ])
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137 app.error_handlers[403] = themed_error
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138 clock.stop('create_app flask-themes')
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139 clock.stop('create_app total')
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140 del clock
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141 return app
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142
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143
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144 from MoinMoin.util.clock import Clock
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145 from MoinMoin.storage.error import StorageError
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146 from MoinMoin.storage.serialization import serialize, unserialize
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147 from MoinMoin.storage.backends import router, acl, memory
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148 from MoinMoin import auth, config, user
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149
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150
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151 def set_umask(new_mask=0777^config.umask):
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152 """ Set the OS umask value (and ignore potential failures on OSes where
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153 this is not supported).
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154 Default: the bitwise inverted value of config.umask
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155 """
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156 try:
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157 old_mask = os.umask(new_mask)
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158 except:
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159 # maybe we are on win32?
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160 pass
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161
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162
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163 def init_backends(app):
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164 """ initialize the backend """
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165 # A ns_mapping consists of several lines, where each line is made up like this:
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166 # mountpoint, unprotected backend, protection to apply as a dict
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167 ns_mapping = app.cfg.namespace_mapping
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168 index_uri = app.cfg.router_index_uri
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169 # Just initialize with unprotected backends.
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170 unprotected_mapping = [(ns, backend) for ns, backend, acls in ns_mapping]
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171 unprotected_storage = router.RouterBackend(unprotected_mapping, index_uri=index_uri)
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172 # Protect each backend with the acls provided for it in the mapping at position 2
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173 amw = acl.AclWrapperBackend
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174 protected_mapping = [(ns, amw(app.cfg, backend, **acls)) for ns, backend, acls in ns_mapping]
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175 storage = router.RouterBackend(protected_mapping, index_uri=index_uri)
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176 return unprotected_storage, storage
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177
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178
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179 def import_export_xml(app):
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180 # If the content was already pumped into the backend, we don't want
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181 # to do that again. (Works only until the server is restarted.)
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182 xmlfile = app.cfg.load_xml
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183 if xmlfile:
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184 app.cfg.load_xml = None
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185 tmp_backend = router.RouterBackend([('/', memory.MemoryBackend())],
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186 index_uri='sqlite://')
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187 unserialize(tmp_backend, xmlfile)
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188 # TODO optimize this, maybe unserialize could count items it processed
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189 item_count = 0
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190 for item in tmp_backend.iteritems():
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191 item_count += 1
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192 logging.debug("loaded xml into tmp_backend: %s, %d items" % (xmlfile, item_count))
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193 try:
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194 # In case the server was restarted we cannot know whether
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195 # the xml data already exists in the target backend.
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196 # Hence we check the existence of the items before we unserialize
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197 # them to the backend.
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198 backend = app.unprotected_storage
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199 for item in tmp_backend.iteritems():
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200 item = backend.get_item(item.name)
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201 except StorageError:
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202 # if there is some exception, we assume that backend needs to be filled
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203 # we need to use it as unserialization target so that update mode of
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204 # unserialization creates the correct item revisions
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205 logging.debug("unserialize xml file %s into %r" % (xmlfile, backend))
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206 unserialize(backend, xmlfile)
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207 else:
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208 item_count = 0
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209
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210 # XXX wrong place / name - this is a generic preload functionality, not just for tests
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211 # To make some tests happy
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212 app.cfg.test_num_pages = item_count
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213
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214 xmlfile = app.cfg.save_xml
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215 if xmlfile:
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216 app.cfg.save_xml = None
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217 backend = app.unprotected_storage
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218 serialize(backend, xmlfile)
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219
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220
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221 def setup_user():
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222 """ Try to retrieve a valid user object from the request, be it
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223 either through the session or through a login. """
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224 # init some stuff for auth processing:
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225 flaskg._login_multistage = None
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226 flaskg._login_multistage_name = None
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227 flaskg._login_messages = []
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228
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229 # first try setting up from session
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230 userobj = auth.setup_from_session()
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231
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232 # then handle login/logout forms
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233 form = request.values.to_dict()
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234 if 'login_submit' in form:
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235 # this is a real form, submitted by POST
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236 userobj = auth.handle_login(userobj, **form)
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237 elif 'logout_submit' in form:
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238 # currently just a GET link
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239 userobj = auth.handle_logout(userobj)
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240 else:
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241 userobj = auth.handle_request(userobj)
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242
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243 # if we still have no user obj, create a dummy:
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244 if not userobj:
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245 userobj = user.User(auth_method='invalid')
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246 # if we have a valid user we store it in the session
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247 if userobj.valid:
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248 session['user.id'] = userobj.id
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249 session['user.auth_method'] = userobj.auth_method
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250 session['user.auth_attribs'] = userobj.auth_attribs
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251 return userobj
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252
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253
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254 def before_wiki():
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255 """
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256 Setup environment for wiki requests, start timers.
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257 """
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258 logging.debug("running before_wiki")
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259 flaskg.clock = Clock()
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260 flaskg.clock.start('total')
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261 flaskg.clock.start('init')
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262 try:
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263 set_umask() # do it once per request because maybe some server
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264 # software sets own umask
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265
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266 flaskg.unprotected_storage = app.unprotected_storage
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267
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268 try:
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269 flaskg.user = setup_user()
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270 except HTTPException, e:
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271 # this makes stuff like abort(redirect(...)) work
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272 return app.handle_http_exception(e)
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273
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274 flaskg.dicts = app.cfg.dicts()
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275 flaskg.groups = app.cfg.groups()
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276
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277 flaskg.content_lang = app.cfg.language_default
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278 flaskg.current_lang = app.cfg.language_default
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279
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280 flaskg.storage = app.storage
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281
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282 setup_jinja_env()
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283 finally:
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284 flaskg.clock.stop('init')
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285
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286 # if return value is not None, it is the final response
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287
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288
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289 def after_wiki(response):
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290 """
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291 Stop timers.
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292 """
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293 logging.debug("running after_wiki")
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294 try:
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295 flaskg.clock.stop('total')
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296 del flaskg.clock
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297 except AttributeError:
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298 # can happen if after_wiki() is called twice, e.g. by unit tests.
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299 pass
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300 return response
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301