web/propertysheet.py
author Pierre-Yves David <pierre-yves.david@logilab.fr>
Fri, 21 Jun 2013 13:42:19 +0200
changeset 9055 2567b7d04e49
parent 8695 358d8bed9626
child 10505 a9becf2cce8b
permissions -rw-r--r--
[client-connection] add a sessionid property for dbapi compatibility To ease transition from dbapi to repoapi we need the ClientConnection to be as compatible as possible with the dbapi. Adding this method goes in this direction. It'll get deprecated in the deprecation wave that will conclude the repoapi refactoring. related to #2503918
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# copyright 2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
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"""property sheets allowing configuration of the web ui"""
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__docformat__ = "restructuredtext en"
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import re
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import os
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import os.path as osp
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TYPE_CHECKS = [('STYLESHEETS', list), ('JAVASCRIPTS', list),
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               ('STYLESHEETS_IE', list), ('STYLESHEETS_PRINT', list),
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               ]
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class lazystr(object):
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    def __init__(self, string, context):
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        self.string = string
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        self.context = context
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    def __str__(self):
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        return self.string % self.context
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class PropertySheet(dict):
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    def __init__(self, cache_directory, **context):
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        self._cache_directory = cache_directory
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        self.context = context
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        self.reset()
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        context['sheet'] = self
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        context['lazystr'] = self.lazystr
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        self._percent_rgx = re.compile('%(?!\()')
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    def lazystr(self, str):
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        return lazystr(str, self)
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    def reset(self):
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        self.clear()
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        self._ordered_propfiles = []
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        self._propfile_mtime = {}
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        self._sourcefile_mtime = {}
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        self._cache = {}
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    def load(self, fpath):
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        scriptglobals = self.context.copy()
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        scriptglobals['__file__'] = fpath
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        execfile(fpath, scriptglobals, self)
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        for name, type in TYPE_CHECKS:
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            if name in self:
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                if not isinstance(self[name], type):
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                    msg = "Configuration error: %s.%s should be a %s" % (fpath, name, type)
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                    raise Exception(msg)
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        self._propfile_mtime[fpath] = os.stat(fpath)[-2]
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        self._ordered_propfiles.append(fpath)
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    def need_reload(self):
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        for rid, (adirectory, rdirectory, mtime) in self._cache.items():
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            if os.stat(osp.join(rdirectory, rid))[-2] > mtime:
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                del self._cache[rid]
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        for fpath, mtime in self._propfile_mtime.iteritems():
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            if os.stat(fpath)[-2] > mtime:
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                return True
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        return False
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    def reload(self):
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        ordered_files = self._ordered_propfiles
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        self.reset()
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        for fpath in ordered_files:
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            self.load(fpath)
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    def reload_if_needed(self):
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        if self.need_reload():
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            self.reload()
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    def process_resource(self, rdirectory, rid):
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        try:
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            return self._cache[rid][0]
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        except KeyError:
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            cachefile = osp.join(self._cache_directory, rid)
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            self.debug('caching processed %s/%s into %s',
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                       rdirectory, rid, cachefile)
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            rcachedir = osp.dirname(cachefile)
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            if not osp.exists(rcachedir):
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                os.makedirs(rcachedir)
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            sourcefile = osp.join(rdirectory, rid)
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            content = file(sourcefile).read()
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            # XXX replace % not followed by a paren by %% to avoid having to do
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            # this in the source css file ?
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            try:
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                content = self.compile(content)
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            except ValueError as ex:
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                self.error("can't process %s/%s: %s", rdirectory, rid, ex)
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                adirectory = rdirectory
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   107
            else:
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                stream = file(cachefile, 'w')
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                stream.write(content)
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                stream.close()
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   111
                adirectory = self._cache_directory
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            self._cache[rid] = (adirectory, rdirectory, os.stat(sourcefile)[-2])
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            return adirectory
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   114
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   115
    def compile(self, content):
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        return self._percent_rgx.sub('%%', content) % self
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   117
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    # these are overridden by set_log_methods below
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    # only defining here to prevent pylint from complaining
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    info = warning = error = critical = exception = debug = lambda msg,*a,**kw: None
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   121
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   122
from cubicweb.web import LOGGER
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from logilab.common.logging_ext import set_log_methods
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set_log_methods(PropertySheet, LOGGER)