server/sources/datafeed.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Tue, 31 Jan 2012 21:43:24 +0100
changeset 8188 1867e252e487
parent 8187 981f6e487788
child 8230 00435a332502
permissions -rw-r--r--
[repository] ldap-feed source. Closes #2086984 datafeed based source which copy a subtree of the ldap directory into the system database. Authentication still go through ldap though. Pros: * don't need temporary tables and such for multi-sources RQL queries execution * much more flexible to enhance / configure behaviour (you simply have to replace the parser) * run better when ldap isn't reachable Cons: * no more 'on the fly' discovery of users (though a user authenticating itself will be automatically added if it doesn't exist in the db yet) * synchronization may be heavy if there are a lot of users A new cw.server.ldaputils containing code in common between former ldapuser and new ldapfeed sources has been introduced. Also ldapuser source now uses url instead of custom host/protocol option so it looks like a datafeed source (could be improved).
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# copyright 2010-2012 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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"""datafeed sources: copy data from an external data stream into the system
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database
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"""
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from __future__ import with_statement
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import urllib2
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import StringIO
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from os.path import exists
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from datetime import datetime, timedelta
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from base64 import b64decode
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from cookielib import CookieJar
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from lxml import etree
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from logilab.mtconverter import xml_escape
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from cubicweb import RegistryNotFound, ObjectNotFound, ValidationError, UnknownEid
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from cubicweb.server.sources import AbstractSource
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from cubicweb.appobject import AppObject
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class DataFeedSource(AbstractSource):
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    copy_based_source = True
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    use_cwuri_as_url = True
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    options = (
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        ('synchronize',
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         {'type' : 'yn',
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          'default': True,
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          'help': ('Is the repository responsible to automatically import '
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                   'content from this source? '
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                   'You should say yes unless you don\'t want this behaviour '
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                   'or if you use a multiple repositories setup, in which '
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                   'case you should say yes on one repository, no on others.'),
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          'group': 'datafeed-source', 'level': 2,
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          }),
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        ('synchronization-interval',
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         {'type' : 'time',
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          'default': '5min',
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          'help': ('Interval in seconds between synchronization with the '
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                   'external source (default to 5 minutes, must be >= 1 min).'),
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          'group': 'datafeed-source', 'level': 2,
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          }),
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        ('max-lock-lifetime',
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         {'type' : 'time',
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          'default': '1h',
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          'help': ('Maximum time allowed for a synchronization to be run. '
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                   'Exceeded that time, the synchronization will be considered '
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                   'as having failed and not properly released the lock, hence '
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                   'it won\'t be considered'),
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          'group': 'datafeed-source', 'level': 2,
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          }),
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        ('delete-entities',
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         {'type' : 'yn',
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          'default': True,
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          'help': ('Should already imported entities not found anymore on the '
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                   'external source be deleted?'),
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          'group': 'datafeed-source', 'level': 2,
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          }),
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        ('logs-lifetime',
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         {'type': 'time',
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          'default': '10d',
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          'help': ('Time before logs from datafeed imports are deleted.'),
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          'group': 'datafeed-source', 'level': 2,
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          }),
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        )
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    def __init__(self, repo, source_config, eid=None):
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        AbstractSource.__init__(self, repo, source_config, eid)
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        self.update_config(None, self.check_conf_dict(eid, source_config,
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                                                      fail_if_unknown=False))
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    def check_config(self, source_entity):
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        """check configuration of source entity"""
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        typedconfig = super(DataFeedSource, self).check_config(source_entity)
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        if typedconfig['synchronization-interval'] < 60:
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            _ = source_entity._cw._
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            msg = _('synchronization-interval must be greater than 1 minute')
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            raise ValidationError(source_entity.eid, {'config': msg})
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        return typedconfig
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    def _entity_update(self, source_entity):
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        source_entity.complete()
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        self.parser_id = source_entity.parser
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        self.latest_retrieval = source_entity.latest_retrieval
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        if source_entity.url:
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   102
            self.urls = [url.strip() for url in source_entity.url.splitlines()
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   103
                         if url.strip()]
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   104
        else:
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   105
            self.urls = []
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parents: 8187
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   106
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   107
    def update_config(self, source_entity, typedconfig):
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   108
        """update configuration from source entity. `typedconfig` is config
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   109
        properly typed with defaults set
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   110
        """
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   111
        self.synchro_interval = timedelta(seconds=typedconfig['synchronization-interval'])
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   112
        self.max_lock_lifetime = timedelta(seconds=typedconfig['max-lock-lifetime'])
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   113
        if source_entity is not None:
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   114
            self._entity_update(source_entity)
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   115
        self.config = typedconfig
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   116
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   117
    def init(self, activated, source_entity):
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   118
        if activated:
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   119
            self._entity_update(source_entity)
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   120
        self.parser_id = source_entity.parser
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   121
        self.load_mapping(source_entity._cw)
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   122
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   123
    def _get_parser(self, session, **kwargs):
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   124
        return self.repo.vreg['parsers'].select(
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   125
            self.parser_id, session, source=self, **kwargs)
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   126
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   127
    def load_mapping(self, session):
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   128
        self.mapping = {}
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   129
        self.mapping_idx = {}
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   130
        try:
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   131
            parser = self._get_parser(session)
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   132
        except (RegistryNotFound, ObjectNotFound):
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   133
            return # no parser yet, don't go further
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   134
        self._load_mapping(session, parser=parser)
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   135
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   136
    def add_schema_config(self, schemacfg, checkonly=False, parser=None):
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   137
        """added CWSourceSchemaConfig, modify mapping accordingly"""
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   138
        if parser is None:
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   139
            parser = self._get_parser(schemacfg._cw)
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   140
        parser.add_schema_config(schemacfg, checkonly)
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   141
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   142
    def del_schema_config(self, schemacfg, checkonly=False, parser=None):
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   143
        """deleted CWSourceSchemaConfig, modify mapping accordingly"""
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
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   144
        if parser is None:
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   145
            parser = self._get_parser(schemacfg._cw)
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   146
        parser.del_schema_config(schemacfg, checkonly)
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   147
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   148
    def fresh(self):
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   149
        if self.latest_retrieval is None:
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   150
            return False
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   151
        return datetime.utcnow() < (self.latest_retrieval + self.synchro_interval)
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   152
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   153
    def update_latest_retrieval(self, session):
6fba86efdd09 [datafeed] extract some methods from pull_data to ease writing custom datafeed sources
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   154
        self.latest_retrieval = datetime.utcnow()
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   155
        session.execute('SET X latest_retrieval %(date)s WHERE X eid %(x)s',
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   156
                        {'x': self.eid, 'date': self.latest_retrieval})
6fba86efdd09 [datafeed] extract some methods from pull_data to ease writing custom datafeed sources
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   157
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diff changeset
   158
    def acquire_synchronization_lock(self, session):
c54038622fc9 [datafeed] use a boolean flag on CWSource to ensure we don't have concurrent synchronizations. Closes #1725690
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   159
        # XXX race condition until WHERE of SET queries is executed using
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   160
        # 'SELECT FOR UPDATE'
7921
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diff changeset
   161
        now = datetime.utcnow()
7933
b25dda2214a2 [datafeed] remove remaining uses of 'synchronizing' attribute replaced by 'in_synchronization' in 3.13.8. Closes #1989131
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diff changeset
   162
        if not session.execute(
b25dda2214a2 [datafeed] remove remaining uses of 'synchronizing' attribute replaced by 'in_synchronization' in 3.13.8. Closes #1989131
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   163
            'SET X in_synchronization %(now)s WHERE X eid %(x)s, '
b25dda2214a2 [datafeed] remove remaining uses of 'synchronizing' attribute replaced by 'in_synchronization' in 3.13.8. Closes #1989131
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   164
            'X in_synchronization NULL OR X in_synchronization < %(maxdt)s',
b25dda2214a2 [datafeed] remove remaining uses of 'synchronizing' attribute replaced by 'in_synchronization' in 3.13.8. Closes #1989131
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   165
            {'x': self.eid, 'now': now, 'maxdt': now - self.max_lock_lifetime}):
7456
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   166
            self.error('concurrent synchronization detected, skip pull')
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   167
            session.commit(free_cnxset=False)
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   168
            return False
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diff changeset
   169
        session.commit(free_cnxset=False)
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   170
        return True
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   171
c54038622fc9 [datafeed] use a boolean flag on CWSource to ensure we don't have concurrent synchronizations. Closes #1725690
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   172
    def release_synchronization_lock(self, session):
7708
45be3a9debe6 [datafeed] for datafeed source, we don't want commit in extid2eid but explicitly handled by the source. Also, we should use 'safe' internal session
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   173
        session.set_cnxset()
7933
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parents: 7921
diff changeset
   174
        session.execute('SET X in_synchronization NULL WHERE X eid %(x)s',
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   175
                        {'x': self.eid})
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   176
        session.commit()
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diff changeset
   177
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Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7001
diff changeset
   178
    def pull_data(self, session, force=False, raise_on_error=False):
7456
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   179
        """Launch synchronization of the source if needed.
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   180
c54038622fc9 [datafeed] use a boolean flag on CWSource to ensure we don't have concurrent synchronizations. Closes #1725690
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   181
        This method is responsible to handle commit/rollback on the given
c54038622fc9 [datafeed] use a boolean flag on CWSource to ensure we don't have concurrent synchronizations. Closes #1725690
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   182
        session.
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diff changeset
   183
        """
6957
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diff changeset
   184
        if not force and self.fresh():
6972
12aa5cd81ce5 [datafeed] return empty dict when source is fresh avoid crash in the looping task because None returned
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parents: 6957
diff changeset
   185
            return {}
7456
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parents: 7447
diff changeset
   186
        if not self.acquire_synchronization_lock(session):
c54038622fc9 [datafeed] use a boolean flag on CWSource to ensure we don't have concurrent synchronizations. Closes #1725690
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diff changeset
   187
            return {}
c54038622fc9 [datafeed] use a boolean flag on CWSource to ensure we don't have concurrent synchronizations. Closes #1725690
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diff changeset
   188
        try:
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parents: 7447
diff changeset
   189
            with session.transaction(free_cnxset=False):
c54038622fc9 [datafeed] use a boolean flag on CWSource to ensure we don't have concurrent synchronizations. Closes #1725690
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parents: 7447
diff changeset
   190
                return self._pull_data(session, force, raise_on_error)
c54038622fc9 [datafeed] use a boolean flag on CWSource to ensure we don't have concurrent synchronizations. Closes #1725690
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parents: 7447
diff changeset
   191
        finally:
c54038622fc9 [datafeed] use a boolean flag on CWSource to ensure we don't have concurrent synchronizations. Closes #1725690
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diff changeset
   192
            self.release_synchronization_lock(session)
c54038622fc9 [datafeed] use a boolean flag on CWSource to ensure we don't have concurrent synchronizations. Closes #1725690
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diff changeset
   193
c54038622fc9 [datafeed] use a boolean flag on CWSource to ensure we don't have concurrent synchronizations. Closes #1725690
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parents: 7447
diff changeset
   194
    def _pull_data(self, session, force=False, raise_on_error=False):
6957
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parents:
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   195
        if self.config['delete-entities']:
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
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parents:
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   196
            myuris = self.source_cwuris(session)
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   197
        else:
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parents:
diff changeset
   198
            myuris = None
7995
9a9f35ef418c Record a log of datafeed source imports (closes #2026097)
Julien Cristau <julien.cristau@logilab.fr>
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diff changeset
   199
        importlog = self.init_import_log(session)
9a9f35ef418c Record a log of datafeed source imports (closes #2026097)
Julien Cristau <julien.cristau@logilab.fr>
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diff changeset
   200
        parser = self._get_parser(session, sourceuris=myuris, import_log=importlog)
7446
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diff changeset
   201
        if self.process_urls(parser, self.urls, raise_on_error):
6957
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            self.warning("some error occured, don't attempt to delete entities")
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        elif self.config['delete-entities'] and myuris:
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            for extid, (eid, etype) in myuris.iteritems():
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                if parser.is_deleted(extid, etype, eid):
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                    byetype.setdefault(etype, []).append(str(eid))
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            for etype, eids in byetype.iteritems():
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                self.warning('delete %s %s entities', len(eids), etype)
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                session.execute('DELETE %s X WHERE X eid IN (%s)'
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                                % (etype, ','.join(eids)))
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        self.update_latest_retrieval(session)
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        stats = parser.stats
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        if stats.get('created'):
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            importlog.record_info('added %s entities' % len(stats['created']))
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        if stats.get('updated'):
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            importlog.record_info('updated %s entities' % len(stats['updated']))
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        importlog.write_log(session, end_timestamp=self.latest_retrieval)
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        return stats
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    def process_urls(self, parser, urls, raise_on_error=False):
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        error = False
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        for url in urls:
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            self.info('pulling data from %s', url)
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            try:
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                if parser.process(url, raise_on_error):
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                    error = True
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            except IOError, exc:
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                if raise_on_error:
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                    raise
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                parser.import_log.record_error(
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                    'could not pull data while processing %s: %s'
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                    % (url, exc))
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                error = True
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            except Exception, exc:
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                if raise_on_error:
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                    raise
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                self.exception('error while processing %s: %s',
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                               url, exc)
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                error = True
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        return error
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    def before_entity_insertion(self, session, lid, etype, eid, sourceparams):
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        """called by the repository when an eid has been attributed for an
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        entity stored here but the entity has not been inserted in the system
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        table yet.
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        This method must return the an Entity instance representation of this
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        entity.
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        """
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        entity = super(DataFeedSource, self).before_entity_insertion(
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            session, lid, etype, eid, sourceparams)
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        entity.cw_edited['cwuri'] = lid.decode('utf-8')
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        entity.cw_edited.set_defaults()
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        sourceparams['parser'].before_entity_copy(entity, sourceparams)
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        return entity
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    def after_entity_insertion(self, session, lid, entity, sourceparams):
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        """called by the repository after an entity stored here has been
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        inserted in the system table.
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        """
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        if session.is_hook_category_activated('integrity'):
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            entity.cw_edited.check(creation=True)
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        self.repo.system_source.add_entity(session, entity)
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        entity.cw_edited.saved = entity._cw_is_saved = True
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        sourceparams['parser'].after_entity_copy(entity, sourceparams)
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    def source_cwuris(self, session):
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        sql = ('SELECT extid, eid, type FROM entities, cw_source_relation '
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               'WHERE entities.eid=cw_source_relation.eid_from '
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               'AND cw_source_relation.eid_to=%s' % self.eid)
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        return dict((b64decode(uri), (eid, type))
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                    for uri, eid, type in session.system_sql(sql))
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    def init_import_log(self, session, **kwargs):
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        dataimport = session.create_entity('CWDataImport', cw_import_of=self,
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                                           start_timestamp=datetime.utcnow(),
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                                           **kwargs)
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        dataimport.init()
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        return dataimport
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class DataFeedParser(AppObject):
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    __registry__ = 'parsers'
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    def __init__(self, session, source, sourceuris=None, import_log=None, **kwargs):
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        super(DataFeedParser, self).__init__(session, **kwargs)
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        self.source = source
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        self.sourceuris = sourceuris
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        self.import_log = import_log
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        self.stats = {'created': set(),
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                      'updated': set()}
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    def normalize_url(self, url):
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        from cubicweb.sobjects import URL_MAPPING # available after registration
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        for mappedurl in URL_MAPPING:
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            if url.startswith(mappedurl):
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                return url.replace(mappedurl, URL_MAPPING[mappedurl], 1)
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        return url
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    def add_schema_config(self, schemacfg, checkonly=False):
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        """added CWSourceSchemaConfig, modify mapping accordingly"""
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        msg = schemacfg._cw._("this parser doesn't use a mapping")
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        raise ValidationError(schemacfg.eid, {None: msg})
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parents:
diff changeset
   304
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
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parents:
diff changeset
   305
    def del_schema_config(self, schemacfg, checkonly=False):
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
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parents:
diff changeset
   306
        """deleted CWSourceSchemaConfig, modify mapping accordingly"""
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   307
        msg = schemacfg._cw._("this parser doesn't use a mapping")
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   308
        raise ValidationError(schemacfg.eid, {None: msg})
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   309
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   310
    def extid2entity(self, uri, etype, **sourceparams):
7399
972ed1843bd8 [multi-sources] support for moving an entity from an external source (closes #343818)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7398
diff changeset
   311
        """return an entity for the given uri. May return None if it should be
972ed1843bd8 [multi-sources] support for moving an entity from an external source (closes #343818)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7398
diff changeset
   312
        skipped
972ed1843bd8 [multi-sources] support for moving an entity from an external source (closes #343818)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7398
diff changeset
   313
        """
7697
ef50074a0314 [repo api] deprecates source.extid2eid, only the system source should implement it,
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7642
diff changeset
   314
        session = self._cw
7534
d58a9d96aad8 [datafeed, cw.xml] xml now carry entity's source information, interpreted at the other end so that for instance when an entity from elo is seen when importing cwo, it's properly marked as coming from elo source if one exists
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7533
diff changeset
   315
        # if cwsource is specified and repository has a source with the same
d58a9d96aad8 [datafeed, cw.xml] xml now carry entity's source information, interpreted at the other end so that for instance when an entity from elo is seen when importing cwo, it's properly marked as coming from elo source if one exists
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7533
diff changeset
   316
        # name, call extid2eid on that source so entity will be properly seen as
d58a9d96aad8 [datafeed, cw.xml] xml now carry entity's source information, interpreted at the other end so that for instance when an entity from elo is seen when importing cwo, it's properly marked as coming from elo source if one exists
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7533
diff changeset
   317
        # coming from this source
7699
d07cde311630 [datafeed] properly take care to cwsource=system in imported xml. Closes #1877017
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7698
diff changeset
   318
        source_uri = sourceparams.pop('cwsource', None)
d07cde311630 [datafeed] properly take care to cwsource=system in imported xml. Closes #1877017
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7698
diff changeset
   319
        if source_uri is not None and source_uri != 'system':
d07cde311630 [datafeed] properly take care to cwsource=system in imported xml. Closes #1877017
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7698
diff changeset
   320
            source = session.repo.sources_by_uri.get(source_uri, self.source)
d07cde311630 [datafeed] properly take care to cwsource=system in imported xml. Closes #1877017
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7698
diff changeset
   321
        else:
d07cde311630 [datafeed] properly take care to cwsource=system in imported xml. Closes #1877017
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7698
diff changeset
   322
            source = self.source
6957
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   323
        sourceparams['parser'] = self
7731
48e78934a4e2 [datafeed] properly encode/decode external uri
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7727
diff changeset
   324
        if isinstance(uri, unicode):
48e78934a4e2 [datafeed] properly encode/decode external uri
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7727
diff changeset
   325
            uri = uri.encode('utf-8')
7590
a9aad6c25836 closes #1793991: [datafeed] error handling: log unexpected exceptions / don't stop on first validation error
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7552
diff changeset
   326
        try:
7697
ef50074a0314 [repo api] deprecates source.extid2eid, only the system source should implement it,
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7642
diff changeset
   327
            eid = session.repo.extid2eid(source, str(uri), etype, session,
7708
45be3a9debe6 [datafeed] for datafeed source, we don't want commit in extid2eid but explicitly handled by the source. Also, we should use 'safe' internal session
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7699
diff changeset
   328
                                         complete=False, commit=False,
7698
1c7411535c2d [datafeed / fti] rather control a 'complete' parameter than setting empty attribute values
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7697
diff changeset
   329
                                         sourceparams=sourceparams)
7590
a9aad6c25836 closes #1793991: [datafeed] error handling: log unexpected exceptions / don't stop on first validation error
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7552
diff changeset
   330
        except ValidationError, ex:
7950
99ae8c883ad3 [ms repository] when an exception is raised during extid2eid and no rollback is done, some manual cleanups have to be done (closes #1993420)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7934
diff changeset
   331
            # XXX use critical so they are seen during tests. Should consider
99ae8c883ad3 [ms repository] when an exception is raised during extid2eid and no rollback is done, some manual cleanups have to be done (closes #1993420)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7934
diff changeset
   332
            # raise_on_error instead?
99ae8c883ad3 [ms repository] when an exception is raised during extid2eid and no rollback is done, some manual cleanups have to be done (closes #1993420)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7934
diff changeset
   333
            self.source.critical('error while creating %s: %s', etype, ex)
8069
4341fb713b14 [datafeed log] properly log errors catched at the source level
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8068
diff changeset
   334
            self.import_log.record_error('error while creating %s: %s'
4341fb713b14 [datafeed log] properly log errors catched at the source level
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8068
diff changeset
   335
                                         % (etype, ex))
7590
a9aad6c25836 closes #1793991: [datafeed] error handling: log unexpected exceptions / don't stop on first validation error
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7552
diff changeset
   336
            return None
7399
972ed1843bd8 [multi-sources] support for moving an entity from an external source (closes #343818)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7398
diff changeset
   337
        if eid < 0:
972ed1843bd8 [multi-sources] support for moving an entity from an external source (closes #343818)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7398
diff changeset
   338
            # entity has been moved away from its original source
972ed1843bd8 [multi-sources] support for moving an entity from an external source (closes #343818)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7398
diff changeset
   339
            #
972ed1843bd8 [multi-sources] support for moving an entity from an external source (closes #343818)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7398
diff changeset
   340
            # Don't give etype to entity_from_eid so we get UnknownEid if the
972ed1843bd8 [multi-sources] support for moving an entity from an external source (closes #343818)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7398
diff changeset
   341
            # entity has been removed
972ed1843bd8 [multi-sources] support for moving an entity from an external source (closes #343818)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7398
diff changeset
   342
            try:
7697
ef50074a0314 [repo api] deprecates source.extid2eid, only the system source should implement it,
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7642
diff changeset
   343
                entity = session.entity_from_eid(-eid)
7399
972ed1843bd8 [multi-sources] support for moving an entity from an external source (closes #343818)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7398
diff changeset
   344
            except UnknownEid:
972ed1843bd8 [multi-sources] support for moving an entity from an external source (closes #343818)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7398
diff changeset
   345
                return None
972ed1843bd8 [multi-sources] support for moving an entity from an external source (closes #343818)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7398
diff changeset
   346
            self.notify_updated(entity) # avoid later update from the source's data
972ed1843bd8 [multi-sources] support for moving an entity from an external source (closes #343818)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7398
diff changeset
   347
            return entity
6957
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   348
        if self.sourceuris is not None:
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   349
            self.sourceuris.pop(str(uri), None)
7697
ef50074a0314 [repo api] deprecates source.extid2eid, only the system source should implement it,
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7642
diff changeset
   350
        return session.entity_from_eid(eid, etype)
6957
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   351
7378
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   352
    def process(self, url, partialcommit=True):
6957
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   353
        """main callback: process the url"""
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   354
        raise NotImplementedError
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   355
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   356
    def before_entity_copy(self, entity, sourceparams):
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   357
        raise NotImplementedError
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   358
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   359
    def after_entity_copy(self, entity, sourceparams):
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   360
        self.stats['created'].add(entity.eid)
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   361
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   362
    def created_during_pull(self, entity):
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   363
        return entity.eid in self.stats['created']
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   364
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   365
    def updated_during_pull(self, entity):
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   366
        return entity.eid in self.stats['updated']
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   367
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   368
    def notify_updated(self, entity):
ffda12be2e9f [repository] #1460066: backport datafeed cube as cubicweb source
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
diff changeset
   369
        return self.stats['updated'].add(entity.eid)
7378
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   370
8187
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   371
    def is_deleted(self, extid, etype, eid):
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   372
        """return True if the entity of given external id, entity type and eid
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   373
        is actually deleted. Always return True by default, put more sensible
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   374
        stuff in sub-classes.
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   375
        """
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   376
        return True
7378
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   377
8188
1867e252e487 [repository] ldap-feed source. Closes #2086984
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8187
diff changeset
   378
    def update_if_necessary(self, entity, attrs):
1867e252e487 [repository] ldap-feed source. Closes #2086984
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8187
diff changeset
   379
        self.notify_updated(entity)
1867e252e487 [repository] ldap-feed source. Closes #2086984
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8187
diff changeset
   380
        entity.complete(tuple(attrs))
1867e252e487 [repository] ldap-feed source. Closes #2086984
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8187
diff changeset
   381
        # check modification date and compare attribute values to only update
1867e252e487 [repository] ldap-feed source. Closes #2086984
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8187
diff changeset
   382
        # what's actually needed
1867e252e487 [repository] ldap-feed source. Closes #2086984
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8187
diff changeset
   383
        mdate = attrs.get('modification_date')
1867e252e487 [repository] ldap-feed source. Closes #2086984
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8187
diff changeset
   384
        if not mdate or mdate > entity.modification_date:
1867e252e487 [repository] ldap-feed source. Closes #2086984
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8187
diff changeset
   385
            attrs = dict( (k, v) for k, v in attrs.iteritems()
1867e252e487 [repository] ldap-feed source. Closes #2086984
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8187
diff changeset
   386
                          if v != getattr(entity, k))
1867e252e487 [repository] ldap-feed source. Closes #2086984
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8187
diff changeset
   387
            if attrs:
1867e252e487 [repository] ldap-feed source. Closes #2086984
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8187
diff changeset
   388
                entity.set_attributes(**attrs)
1867e252e487 [repository] ldap-feed source. Closes #2086984
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8187
diff changeset
   389
1867e252e487 [repository] ldap-feed source. Closes #2086984
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8187
diff changeset
   390
7378
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   391
class DataFeedXMLParser(DataFeedParser):
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   392
7385
29f050e39b09 [datafeed] propagate raise_on_error to parser's process method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7379
diff changeset
   393
    def process(self, url, raise_on_error=False, partialcommit=True):
7378
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   394
        """IDataFeedParser main entry point"""
7447
d5705c9bbe82 don't crash if we can't fetch data or if xml is malformed
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7446
diff changeset
   395
        try:
d5705c9bbe82 don't crash if we can't fetch data or if xml is malformed
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7446
diff changeset
   396
            parsed = self.parse(url)
d5705c9bbe82 don't crash if we can't fetch data or if xml is malformed
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7446
diff changeset
   397
        except Exception, ex:
7533
43835fbdf97d [datafeed] actually raise on error
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7527
diff changeset
   398
            if raise_on_error:
43835fbdf97d [datafeed] actually raise on error
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7527
diff changeset
   399
                raise
8069
4341fb713b14 [datafeed log] properly log errors catched at the source level
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8068
diff changeset
   400
            self.import_log.record_error(str(ex))
7447
d5705c9bbe82 don't crash if we can't fetch data or if xml is malformed
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7446
diff changeset
   401
            return True
7378
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   402
        error = False
7447
d5705c9bbe82 don't crash if we can't fetch data or if xml is malformed
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7446
diff changeset
   403
        for args in parsed:
7378
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   404
            try:
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   405
                self.process_item(*args)
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   406
                if partialcommit:
7398
26695dd703d8 [repository api] definitly kill usage of word 'pool' to refer to connections set used by a session
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7385
diff changeset
   407
                    # commit+set_cnxset instead of commit(free_cnxset=False) to let
26695dd703d8 [repository api] definitly kill usage of word 'pool' to refer to connections set used by a session
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7385
diff changeset
   408
                    # other a chance to get our connections set
7378
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   409
                    self._cw.commit()
7398
26695dd703d8 [repository api] definitly kill usage of word 'pool' to refer to connections set used by a session
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7385
diff changeset
   410
                    self._cw.set_cnxset()
7378
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   411
            except ValidationError, exc:
7385
29f050e39b09 [datafeed] propagate raise_on_error to parser's process method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7379
diff changeset
   412
                if raise_on_error:
29f050e39b09 [datafeed] propagate raise_on_error to parser's process method
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7379
diff changeset
   413
                    raise
7378
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   414
                if partialcommit:
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   415
                    self.source.error('Skipping %s because of validation error %s' % (args, exc))
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   416
                    self._cw.rollback()
7398
26695dd703d8 [repository api] definitly kill usage of word 'pool' to refer to connections set used by a session
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7385
diff changeset
   417
                    self._cw.set_cnxset()
7378
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   418
                    error = True
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   419
                else:
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   420
                    raise
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   421
        return error
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   422
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   423
    def parse(self, url):
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   424
        if url.startswith('http'):
8187
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   425
            url = self.normalize_url(url)
7378
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   426
            self.source.info('GET %s', url)
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   427
            stream = _OPENER.open(url)
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   428
        elif url.startswith('file://'):
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   429
            stream = open(url[7:])
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   430
        else:
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   431
            stream = StringIO.StringIO(url)
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   432
        return self.parse_etree(etree.parse(stream).getroot())
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   433
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   434
    def parse_etree(self, document):
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   435
        return [(document,)]
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   436
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   437
    def process_item(self, *args):
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   438
        raise NotImplementedError
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   439
8187
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   440
    def is_deleted(self, extid, etype, eid):
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   441
        if extid.startswith('http'):
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   442
            try:
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   443
                _OPENER.open(self.normalize_url(extid)) # XXX HTTP HEAD request
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   444
            except urllib2.HTTPError, ex:
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   445
                if ex.code == 404:
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   446
                    return True
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   447
        elif extid.startswith('file://'):
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   448
            return exists(extid[7:])
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   449
        return False
981f6e487788 [datafeed] set delete-entities=yes is now safer, by checking each entity actually seems deleted. Closes #2165381
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 8069
diff changeset
   450
7378
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   451
# use a cookie enabled opener to use session cookie if any
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   452
_OPENER = urllib2.build_opener()
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   453
try:
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   454
    from logilab.common import urllib2ext
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   455
    _OPENER.add_handler(urllib2ext.HTTPGssapiAuthHandler())
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   456
except ImportError: # python-kerberos not available
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   457
    pass
86a1ae289f05 [datafeed] extract a generic DataFeedXMLParser from CWEntityXMLParser
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 7351
diff changeset
   458
_OPENER.add_handler(urllib2.HTTPCookieProcessor(CookieJar()))