annotate MoinMoin/app.py @ 26:4cd8edde9e94

automatically transform module docstrings, moving legal stuff to comments a script was used to extract all copyright and license strings from the docstring and put them into comment lines above the docstring. this was done to not have the legal stuff in autogenerated docs repeated over and over again.
author Thomas Waldmann <tw AT waldmann-edv DOT de>
date Sun, 27 Feb 2011 18:11:54 +0100
parents 335d7489a074
children fe43d37ca0ef
rev   line source
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1 # Copyright: 2000-2006 by Juergen Hermann <jh@web.de>
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2 # Copyright: 2002-2011 MoinMoin:ThomasWaldmann
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3 # Copyright: 2008 MoinMoin:FlorianKrupicka
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4 # Copyright: 2010 MoinMoin:DiogenesAugusto
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5 # License: GNU GPL v2 (or any later version), see LICENSE.txt for details.
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6
0
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7 """
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8 MoinMoin - wsgi application setup and related code
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9
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10 Use create_app(config) to create the WSGI application (using Flask).
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11 """
0
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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