hooks/__init__.py
author Pierre-Yves David <pierre-yves.david@logilab.fr>
Tue, 27 Nov 2012 11:27:49 +0100
branchstable
changeset 8600 d74addac92bb
parent 8587 bde0501e0251
child 8596 bd4f5052a532
permissions -rw-r--r--
[downloadable] fix filename in HTTP header (closes #2522325, #2522324) Before this changeset we use the `filename` header with utf8 encoded filename all the time. However RFC6266 says: The parameters "filename" and "filename*" differ only in that "filename*" uses the encoding defined in [RFC5987], allowing the use of characters not present in the ISO-8859-1 character set ([ISO-8859-1]). Therefore, we alter the code to: 1. Use `filename` and `ascii` encoding whenever possible, 2. use `filename*` with `utf8` encoding otherwise (with a filename fallback for old browser) We also switch the `content-disposition` value to attachement if filename is specified, this will result as a mandatory download according to RFC6266. This mandatory download is the expected behavior. We changes the filename encoding to RFC5987 which is simpler, supported by all and modern browser (including IE from version 6) and does not suffer from the continuation issue. (see ticket #2522324 for details)

# copyright 2003-2012 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
"""core hooks registering some maintainance tasks as server startup time"""

__docformat__ = "restructuredtext en"

from datetime import timedelta, datetime

from cubicweb.server import hook

class TransactionsCleanupStartupHook(hook.Hook):
    """start task to cleanup transaction data"""
    __regid__ = 'cw.looping-tasks.transactions-cleanup'
    events = ('server_startup',)

    def __call__(self):
        # XXX use named args and inner functions to avoid referencing globals
        # which may cause reloading pb
        lifetime = timedelta(days=self.repo.config['keep-transaction-lifetime'])
        def cleanup_old_transactions(repo=self.repo, lifetime=lifetime):
            mindate = datetime.now() - lifetime
            session = repo.internal_session()
            try:
                session.system_sql(
                    'DELETE FROM transactions WHERE tx_time < %(time)s',
                    {'time': mindate})
                # cleanup deleted entities
                session.system_sql(
                    'DELETE FROM deleted_entities WHERE dtime < %(time)s',
                    {'time': mindate})
                session.commit()
            finally:
                session.close()
        if self.repo.config['undo-enabled']:
            self.repo.looping_task(60*60*24, cleanup_old_transactions,
                                   self.repo)

class UpdateFeedsStartupHook(hook.Hook):
    """start task to update datafeed based sources"""
    __regid__ = 'cw.looping-tasks.update-feeds'
    events = ('server_startup',)

    def __call__(self):
        def update_feeds(repo):
            # don't iter on repo.sources which doesn't include copy based
            # sources (the one we're looking for)
            for source in repo.sources_by_eid.itervalues():
                if (not source.copy_based_source
                    or not repo.config.source_enabled(source)
                    or not source.config['synchronize']):
                    continue
                session = repo.internal_session(safe=True)
                try:
                    source.pull_data(session)
                except Exception, exc:
                    session.exception('while trying to update feed %s', source)
                finally:
                    session.close()
        self.repo.looping_task(60, update_feeds, self.repo)


class DataImportsCleanupStartupHook(hook.Hook):
    """start task to cleanup old data imports (ie datafeed import logs)"""
    __regid__ = 'cw.looping-tasks.dataimports-cleanup'
    events = ('server_startup',)

    def __call__(self):
        def expire_dataimports(repo=self.repo):
            for source in repo.sources_by_eid.itervalues():
                if (not source.copy_based_source
                    or not repo.config.source_enabled(source)):
                    continue
                session = repo.internal_session()
                try:
                    mindate = datetime.now() - timedelta(seconds=source.config['logs-lifetime'])
                    session.execute('DELETE CWDataImport X WHERE X start_timestamp < %(time)s',
                                    {'time': mindate})
                    session.commit()
                finally:
                    session.close()
        self.repo.looping_task(60*60*24, expire_dataimports, self.repo)