web/webconfig.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Mon, 29 Mar 2010 13:25:13 +0200
branchstable
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"""common web configuration for twisted/modpython instances
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:organization: Logilab
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:copyright: 2001-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
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"""
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__docformat__ = "restructuredtext en"
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_ = unicode
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import os
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from os.path import join, exists, split
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from logilab.common.decorators import cached
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from cubicweb.toolsutils import read_config
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from cubicweb.cwconfig import CubicWebConfiguration, register_persistent_options, merge_options
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register_persistent_options( (
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    # site-wide only web ui configuration
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    ('site-title',
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     {'type' : 'string', 'default': 'unset title',
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      'help': _('site title'),
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      'sitewide': True, 'group': 'ui',
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      }),
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    ('main-template',
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     {'type' : 'string', 'default': 'main-template',
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      'help': _('id of main template used to render pages'),
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      'sitewide': True, 'group': 'ui',
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      }),
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    # user web ui configuration
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    ('fckeditor',
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     {'type' : 'yn', 'default': True,
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      'help': _('should html fields being edited using fckeditor (a HTML '
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                'WYSIWYG editor).  You should also select text/html as default '
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                'text format to actually get fckeditor.'),
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      'group': 'ui',
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      }),
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    # navigation configuration
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    ('page-size',
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     {'type' : 'int', 'default': 40,
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      'help': _('maximum number of objects displayed by page of results'),
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      'group': 'navigation',
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      }),
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    ('related-limit',
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     {'type' : 'int', 'default': 8,
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      'help': _('maximum number of related entities to display in the primary '
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                'view'),
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      'group': 'navigation',
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      }),
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    ('combobox-limit',
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     {'type' : 'int', 'default': 20,
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      'help': _('maximum number of entities to display in related combo box'),
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      'group': 'navigation',
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      }),
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    ))
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class WebConfiguration(CubicWebConfiguration):
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    """the WebConfiguration is a singleton object handling instance's
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    configuration and preferences
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    """
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    cubicweb_appobject_path = CubicWebConfiguration.cubicweb_appobject_path | set(['web/views'])
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    cube_appobject_path = CubicWebConfiguration.cube_appobject_path | set(['views'])
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    options = merge_options(CubicWebConfiguration.options + (
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        ('anonymous-user',
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         {'type' : 'string',
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          'default': None,
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          'help': 'login of the CubicWeb user account to use for anonymous user (if you want to allow anonymous)',
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          'group': 'main', 'inputlevel': 1,
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          }),
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        ('anonymous-password',
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         {'type' : 'string',
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          'default': None,
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          'help': 'password of the CubicWeb user account to use for anonymous user, '
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          'if anonymous-user is set',
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          'group': 'main', 'inputlevel': 1,
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          }),
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        ('query-log-file',
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         {'type' : 'string',
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          'default': None,
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          'help': 'web instance query log file',
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          'group': 'main', 'inputlevel': 2,
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          }),
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        # web configuration
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        ('https-url',
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         {'type' : 'string',
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          'default': None,
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          'help': 'web server root url on https. By specifying this option your '\
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          'site can be available as an http and https site. Authenticated users '\
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          'will in this case be authenticated and once done navigate through the '\
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          'https site. IMPORTANTE NOTE: to do this work, you should have your '\
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          'apache redirection include "https" as base url path so cubicweb can '\
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          'differentiate between http vs https access. For instance: \n'\
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          'RewriteRule ^/demo/(.*) http://127.0.0.1:8080/https/$1 [L,P]\n'\
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          'where the cubicweb web server is listening on port 8080.',
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          'group': 'main', 'inputlevel': 2,
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          }),
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        ('auth-mode',
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         {'type' : 'choice',
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          'choices' : ('cookie', 'http'),
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          'default': 'cookie',
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          'help': 'authentication mode (cookie / http)',
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          'group': 'web', 'inputlevel': 1,
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          }),
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        ('realm',
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         {'type' : 'string',
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          'default': 'cubicweb',
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          'help': 'realm to use on HTTP authentication mode',
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          'group': 'web', 'inputlevel': 2,
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          }),
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        ('http-session-time',
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         {'type' : 'int',
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          'default': 0,
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          'help': 'duration in seconds for HTTP sessions. 0 mean no expiration. '\
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          'Should be greater than RQL server\'s session-time.',
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          'group': 'web', 'inputlevel': 2,
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          }),
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        ('cleanup-session-time',
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         {'type' : 'int',
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          'default': 43200,
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          'help': 'duration in seconds for which unused connections should be '\
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          'closed, to limit memory consumption. This is different from '\
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          'http-session-time since in some cases you may have an unexpired http '\
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          'session (e.g. valid session cookie) which will trigger transparent '\
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          'creation of a new session. In other cases, sessions may never expire \
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          and cause memory leak. Should be smaller than http-session-time, '\
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          'unless it\'s 0. Default to 12 h.',
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          'group': 'web', 'inputlevel': 2,
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          }),
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        ('cleanup-anonymous-session-time',
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         {'type' : 'int',
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          'default': 120,
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          'help': 'Same as cleanup-session-time but specific to anonymous '\
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          'sessions. Default to 2 min.',
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          'group': 'web', 'inputlevel': 2,
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          }),
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        ('force-html-content-type',
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         {'type' : 'yn',
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          'default': False,
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          'help': 'force text/html content type for your html pages instead of cubicweb user-agent based'\
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          'deduction of an appropriate content type',
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          'group': 'web', 'inputlevel': 2,
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          }),
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        ('embed-allowed',
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         {'type' : 'regexp',
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          'default': None,
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          'help': 'regular expression matching URLs that may be embeded. \
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leave it blank if you don\'t want the embedding feature, or set it to ".*" \
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if you want to allow everything',
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          'group': 'web', 'inputlevel': 1,
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          }),
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        ('submit-mail',
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         {'type' : 'string',
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          'default': None,
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          'help': ('Mail used as recipient to report bug in this instance, '
0
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                   'if you want this feature on'),
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          'group': 'web', 'inputlevel': 2,
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          }),
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        ('language-negociation',
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         {'type' : 'yn',
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          'default': True,
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          'help': 'use Accept-Language http header to try to set user '\
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          'interface\'s language according to browser defined preferences',
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          'group': 'web', 'inputlevel': 2,
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          }),
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0
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        ('print-traceback',
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         {'type' : 'yn',
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          'default': CubicWebConfiguration.mode != 'system',
0
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          'help': 'print the traceback on the error page when an error occured',
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          'group': 'web', 'inputlevel': 2,
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          }),
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        ('captcha-font-file',
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         {'type' : 'string',
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          'default': join(CubicWebConfiguration.shared_dir(), 'data', 'porkys.ttf'),
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          'help': 'True type font to use for captcha image generation (you \
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must have the python imaging library installed to use captcha)',
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          'group': 'web', 'inputlevel': 2,
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          }),
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        ('captcha-font-size',
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         {'type' : 'int',
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          'default': 25,
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          'help': 'Font size to use for captcha image generation (you must \
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have the python imaging library installed to use captcha)',
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          'group': 'web', 'inputlevel': 2,
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          }),
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0
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        ))
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    def fckeditor_installed(self):
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        return exists(self.ext_resources['FCKEDITOR_PATH'])
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    def eproperty_definitions(self):
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        for key, pdef in super(WebConfiguration, self).eproperty_definitions():
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            if key == 'ui.fckeditor' and not self.fckeditor_installed():
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                continue
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            yield key, pdef
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0
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    # method used to connect to the repository: 'inmemory' / 'pyro'
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    # Pyro repository by default
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    repo_method = 'pyro'
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0
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    # don't use @cached: we want to be able to disable it while this must still
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    # be cached
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    def repository(self, vreg=None):
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        """return the instance's repository object"""
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        try:
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            return self.__repo
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        except AttributeError:
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            from cubicweb.dbapi import get_repository
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            if self.repo_method == 'inmemory':
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                repo = get_repository('inmemory', vreg=vreg, config=self)
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            else:
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                repo = get_repository('pyro', self['pyro-instance-id'],
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                                      config=self)
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            self.__repo = repo
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            return repo
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    def vc_config(self):
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        return self.repository().get_versions()
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0
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    # mapping to external resources (id -> path) (`external_resources` file) ##
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    ext_resources = {
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        'FAVICON':  'DATADIR/favicon.ico',
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        'LOGO':     'DATADIR/logo.png',
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        'RSS_LOGO': 'DATADIR/rss.png',
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        'HELP':     'DATADIR/help.png',
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        'CALENDAR_ICON': 'DATADIR/calendar.gif',
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        'SEARCH_GO':'DATADIR/go.png',
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        'FCKEDITOR_PATH':  '/usr/share/fckeditor/',
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0
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        'IE_STYLESHEETS':    ['DATADIR/cubicweb.ie.css'],
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        'STYLESHEETS':       ['DATADIR/cubicweb.css'],
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        'STYLESHEETS_PRINT': ['DATADIR/cubicweb.print.css'],
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0
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        'JAVASCRIPTS':       ['DATADIR/jquery.js',
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                              'DATADIR/jquery.corner.js',
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                              'DATADIR/jquery.json.js',
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                              'DATADIR/cubicweb.compat.js',
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                              'DATADIR/cubicweb.python.js',
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                              'DATADIR/cubicweb.htmlhelpers.js'],
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        }
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0
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    def anonymous_user(self):
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        """return a login and password to use for anonymous users. None
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        may be returned for both if anonymous connections are not allowed
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        """
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        try:
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            user = self['anonymous-user']
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            passwd = self['anonymous-password']
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        except KeyError:
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            user, passwd = None, None
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        if user is not None:
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            user = unicode(user)
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        return user, passwd
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0
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    def has_resource(self, rid):
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        """return true if an external resource is defined"""
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        return bool(self.ext_resources.get(rid))
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    @cached
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    def locate_resource(self, rid):
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        """return the directory where the given resource may be found"""
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        return self._fs_locate(rid, 'data')
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0
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    @cached
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    def locate_doc_file(self, fname):
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        """return the directory where the given resource may be found"""
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        return self._fs_locate(fname, 'wdoc')
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0
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    def _fs_locate(self, rid, rdirectory):
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        """return the directory where the given resource may be found"""
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        path = [self.apphome] + self.cubes_path() + [join(self.shared_dir())]
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        for directory in path:
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            if exists(join(directory, rdirectory, rid)):
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                return join(directory, rdirectory)
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0
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    def locate_all_files(self, rid, rdirectory='wdoc'):
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        """return all files corresponding to the given resource"""
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        path = [self.apphome] + self.cubes_path() + [join(self.shared_dir())]
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        for directory in path:
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            fpath = join(directory, rdirectory, rid)
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            if exists(fpath):
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                yield join(fpath)
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    def load_configuration(self):
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        """load instance's configuration files"""
0
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        super(WebConfiguration, self).load_configuration()
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        # load external resources definition
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        self._build_ext_resources()
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        self._init_base_url()
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0
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    def _init_base_url(self):
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        # normalize base url(s)
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        baseurl = self['base-url'] or self.default_base_url()
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        if baseurl and baseurl[-1] != '/':
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            baseurl += '/'
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        if not self.repairing:
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            self.global_set_option('base-url', baseurl)
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        httpsurl = self['https-url']
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        if httpsurl and httpsurl[-1] != '/':
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            httpsurl += '/'
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            if not self.repairing:
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                self.global_set_option('https-url', httpsurl)
0
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    def _build_ext_resources(self):
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        libresourcesfile = join(self.shared_dir(), 'data', 'external_resources')
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        self.ext_resources.update(read_config(libresourcesfile))
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        for path in reversed([self.apphome] + self.cubes_path()):
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            resourcesfile = join(path, 'data', 'external_resources')
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            if exists(resourcesfile):
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                self.debug('loading %s', resourcesfile)
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   321
                self.ext_resources.update(read_config(resourcesfile))
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diff changeset
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        resourcesfile = join(self.apphome, 'external_resources')
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diff changeset
   323
        if exists(resourcesfile):
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diff changeset
   324
            self.debug('loading %s', resourcesfile)
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            self.ext_resources.update(read_config(resourcesfile))
0
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   326
        for resource in ('STYLESHEETS', 'STYLESHEETS_PRINT',
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                         'IE_STYLESHEETS', 'JAVASCRIPTS'):
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            val = self.ext_resources[resource]
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   329
            if isinstance(val, str):
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   330
                files = [w.strip() for w in val.split(',') if w.strip()]
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   331
                self.ext_resources[resource] = files
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diff changeset
   332
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diff changeset
   333
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   334
    # static files handling ###################################################
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   336
    @property
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    def static_directory(self):
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   338
        return join(self.appdatahome, 'static')
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   340
    def static_file_exists(self, rpath):
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diff changeset
   341
        return exists(join(self.static_directory, rpath))
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   342
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diff changeset
   343
    def static_file_open(self, rpath, mode='wb'):
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        staticdir = self.static_directory
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   345
        rdir, filename = split(rpath)
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   346
        if rdir:
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   347
            staticdir = join(staticdir, rdir)
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   348
            os.makedirs(staticdir)
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   349
        return file(join(staticdir, filename), mode)
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   350
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   351
    def static_file_add(self, rpath, data):
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diff changeset
   352
        stream = self.static_file_open(rpath)
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   353
        stream.write(data)
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diff changeset
   354
        stream.close()
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   355
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diff changeset
   356
    def static_file_del(self, rpath):
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diff changeset
   357
        if self.static_file_exists(rpath):
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diff changeset
   358
            os.remove(join(self.static_directory, rpath))