110 lines
3.6 KiB
Python
110 lines
3.6 KiB
Python
# Copyright (c) 2013 Rackspace, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import abc
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import functools
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from wsgiref import simple_server
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import falcon
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from oslo.config import cfg
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import six
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from marconi.common import decorators
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from marconi.common.transport import version
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from marconi.common.transport.wsgi import helpers
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import marconi.openstack.common.log as logging
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from marconi.queues import transport
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from marconi.queues.transport import auth, validation
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_WSGI_OPTIONS = [
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cfg.StrOpt('bind', default='127.0.0.1',
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help='Address on which the self-hosting server will listen'),
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cfg.IntOpt('port', default=8888,
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help='Port on which the self-hosting server will listen'),
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cfg.IntOpt('content_max_length', default=256 * 1024),
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cfg.IntOpt('metadata_max_length', default=64 * 1024)
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]
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_WSGI_GROUP = 'drivers:transport:wsgi'
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LOG = logging.getLogger(__name__)
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@six.add_metaclass(abc.ABCMeta)
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class DriverBase(transport.DriverBase):
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def __init__(self, conf, storage, cache, control):
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super(DriverBase, self).__init__(conf, storage, cache, control)
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self._conf.register_opts(_WSGI_OPTIONS, group=_WSGI_GROUP)
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self._wsgi_conf = self._conf[_WSGI_GROUP]
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self._validate = validation.Validator(self._conf)
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self.app = None
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self._init_routes()
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self._init_middleware()
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@decorators.lazy_property(write=False)
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def before_hooks(self):
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"""Exposed to facilitate unit testing."""
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return [
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helpers.require_accepts_json,
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helpers.extract_project_id,
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# NOTE(kgriffs): Depends on project_id being extracted, above
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functools.partial(helpers.validate_queue_name,
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self._validate.queue_name)
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]
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def _init_routes(self):
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"""Initialize hooks and URI routes to resources."""
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self.app = falcon.API(before=self.before_hooks)
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version_path = version.path()
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for route, resource in self.bridge:
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self.app.add_route(version_path + route, resource)
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def _init_middleware(self):
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"""Initialize WSGI middlewarez."""
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# NOTE(flaper87): Install Auth
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if self._conf.auth_strategy:
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strategy = auth.strategy(self._conf.auth_strategy)
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self.app = strategy.install(self.app, self._conf)
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@abc.abstractproperty
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def bridge(self):
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"""Constructs a list of route/responder pairs that can be used to
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establish the functionality of this driver.
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Note: the routes should be unversioned.
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:rtype: [(str, falcon-compatible responser)]
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"""
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raise NotImplementedError
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def listen(self):
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"""Self-host using 'bind' and 'port' from the WSGI config group."""
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msgtmpl = _(u'Serving on host %(bind)s:%(port)s')
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LOG.info(msgtmpl,
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{'bind': self._wsgi_conf.bind, 'port': self._wsgi_conf.port})
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httpd = simple_server.make_server(self._wsgi_conf.bind,
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self._wsgi_conf.port,
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self.app)
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httpd.serve_forever()
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