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# Copyright 2010-2013 Kolab Systems AG (http://www.kolabsys.com)
#
# Jeroen van Meeuwen (Kolab Systems) <vanmeeuwen a kolabsys.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program 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 General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import datetime
import sqlalchemy
from sqlalchemy import Column
from sqlalchemy import DateTime
from sqlalchemy import Integer
from sqlalchemy import MetaData
from sqlalchemy import String
from sqlalchemy import Table
from sqlalchemy import Text
from sqlalchemy import desc
from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import mapper
try:
from sqlalchemy.orm import relationship
except:
from sqlalchemy.orm import relation as relationship
try:
from sqlalchemy.orm import sessionmaker
except:
from sqlalchemy.orm import create_session
import pykolab
from pykolab import utils
from pykolab.constants import KOLAB_LIB_PATH
from pykolab.translate import _
conf = pykolab.getConf()
log = pykolab.getLogger('pykolab.auth_cache')
metadata = MetaData()
db = None
##
## Classes
##
DeclarativeBase = declarative_base()
class Entry(DeclarativeBase):
__tablename__ = 'entries'
id = Column(Integer, primary_key=True)
domain = Column(String(256), index=True, nullable=True)
key = Column(Text, index=True, nullable=False)
value = Column(Text, nullable=False)
last_change = Column(DateTime, nullable=False, default=datetime.datetime.now())
def __init__(self, key, value):
self.key = key
if not isinstance(value, unicode):
self.value = unicode(value, 'utf-8')
else:
self.value = value
##
## Functions
##
def del_entry(key):
db = init_db()
try:
_entries = db.query(Entry).filter_by(key=key).delete()
except sqlalchemy.exc.OperationalError, errmsg:
db = init_db(reinit=True)
except sqlalchemy.exc.InvalidRequest, errmsg:
db = init_db(reinit=True)
finally:
_entries = db.query(Entry).filter_by(key=key).delete()
db.commit()
def get_entry(key):
db = init_db()
try:
_entries = db.query(Entry).filter_by(key=key).all()
except sqlalchemy.exc.OperationalError, errmsg:
db = init_db(reinit=True)
except sqlalchemy.exc.InvalidRequest, errmsg:
db = init_db(reinit=True)
finally:
_entries = db.query(Entry).filter_by(key=key).all()
if len(_entries) == 0:
return None
if len(_entries) > 1:
return None
log.debug("Entry found: %r" % (_entries[0].__dict__))
log.debug("Returning: %r" % (_entries[0].value))
return _entries[0].value.encode('utf-8', 'latin1')
def set_entry(key, value):
db = init_db()
try:
_entries = db.query(Entry).filter_by(key=key).all()
except sqlalchemy.exc.OperationalError, errmsg:
db = init_db(reinit=True)
except sqlalchemy.exc.InvalidRequest, errmsg:
db = init_db(reinit=True)
finally:
_entries = db.query(Entry).filter_by(key=key).all()
if len(_entries) == 0:
db.add(
Entry(
key,
value
)
)
db.commit()
elif len(_entries) == 1:
if not _entries[0].value == value:
_entries[0].value = value
_entries[0].last_change = datetime.datetime.now()
db.commit()
def purge_entries(db):
db.query(Entry).filter(Entry.last_change <= (datetime.datetime.now() - datetime.timedelta(1))).delete()
db.commit()
def init_db(reinit=False):
"""
Returns a SQLAlchemy Session() instance.
"""
global db
if not db == None and not reinit:
return db
db_uri = conf.get('ldap', 'auth_cache_uri')
if db_uri == None:
db_uri = 'sqlite:///%s/auth_cache.db' % (KOLAB_LIB_PATH)
if reinit:
import os
if os.path.isfile('%s/auth_cache.db' % (KOLAB_LIB_PATH)):
os.unlink('%s/auth_cache.db' % (KOLAB_LIB_PATH))
echo = conf.debuglevel > 8
engine = create_engine(db_uri, echo=echo)
DeclarativeBase.metadata.create_all(engine)
Session = sessionmaker(bind=engine)
db = Session()
purge_entries(db)
return db
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