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# Copyright (C) 2008 by the Free Software Foundation, Inc.
#
# 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 2
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
# USA.
"""Pipeline processor."""
__metaclass__ = type
__all__ = [
'initialize',
'process',
]
from zope.interface import implements
from zope.interface.verify import verifyObject
from mailman.app.plugins import get_plugins
from mailman.configuration import config
from mailman.i18n import _
from mailman.interfaces import IHandler, IPipeline
def process(mlist, msg, msgdata, pipeline_name='built-in'):
"""Process the message through the given pipeline.
:param mlist: the IMailingList for this message.
:param msg: The Message object.
:param msgdata: The message metadata dictionary.
:param pipeline_name: The name of the pipeline to process through.
"""
pipeline = config.pipelines[pipeline_name]
for handler in pipeline:
handler.process(mlist, msg, msgdata)
class BuiltInPipeline:
"""The built-in pipeline."""
implements(IPipeline)
name = 'built-in'
description = _('The built-in pipeline.')
_default_handlers = (
'mime-delete',
'scrubber',
'tagger',
'calculate-recipients',
'avoid-duplicates',
'cleanse',
'cleanse-dkim',
'cook-headers',
'to-digest',
'to-archive',
'to-usenet',
'after-delivery',
'acknowledge',
'to-outgoing',
)
def __init__(self):
self._handlers = []
for handler_name in self._default_handlers:
self._handlers.append(config.handlers[handler_name])
def __iter__(self):
"""See `IPipeline`."""
for handler in self._handlers:
yield handler
def initialize():
"""Initialize the pipelines."""
# Find all handlers in the registered plugins.
for handler_finder in get_plugins('mailman.handlers'):
for handler_class in handler_finder():
handler = handler_class()
verifyObject(IHandler, handler)
assert handler.name not in config.handlers, (
'Duplicate handler "%s" found in %s' %
(handler.name, handler_finder))
config.handlers[handler.name] = handler
# Set up some pipelines.
pipeline = BuiltInPipeline()
config.pipelines[pipeline.name] = pipeline
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