144 lines
4.6 KiB
Python
144 lines
4.6 KiB
Python
# -*- encoding: utf-8 -*-
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#
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# Copyright © 2014-2016 eNovance
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import os
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import pkg_resources
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import uuid
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import warnings
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from oslo_log import log
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from oslo_middleware import cors
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from oslo_policy import policy
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from paste import deploy
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import pecan
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from pecan import jsonify
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from stevedore import driver
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import webob.exc
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from gnocchi import exceptions
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from gnocchi import indexer as gnocchi_indexer
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from gnocchi import json
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from gnocchi import service
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from gnocchi import storage as gnocchi_storage
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LOG = log.getLogger(__name__)
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# Register our encoder by default for everything
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jsonify.jsonify.register(object)(json.to_primitive)
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class GnocchiHook(pecan.hooks.PecanHook):
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def __init__(self, storage, indexer, conf):
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self.storage = storage
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self.indexer = indexer
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self.conf = conf
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self.policy_enforcer = policy.Enforcer(conf)
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self.auth_helper = driver.DriverManager("gnocchi.rest.auth_helper",
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conf.api.auth_mode,
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invoke_on_load=True).driver
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def on_route(self, state):
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state.request.storage = self.storage
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state.request.indexer = self.indexer
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state.request.conf = self.conf
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state.request.policy_enforcer = self.policy_enforcer
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state.request.auth_helper = self.auth_helper
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class NotImplementedMiddleware(object):
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def __init__(self, app):
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self.app = app
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def __call__(self, environ, start_response):
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try:
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return self.app(environ, start_response)
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except exceptions.NotImplementedError:
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raise webob.exc.HTTPNotImplemented(
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"Sorry, this Gnocchi server does "
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"not implement this feature 😞")
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# NOTE(sileht): pastedeploy uses ConfigParser to handle
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# global_conf, since python 3 ConfigParser doesn't
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# allow to store object as config value, only strings are
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# permit, so to be able to pass an object created before paste load
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# the app, we store them into a global var. But the each loaded app
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# store it's configuration in unique key to be concurrency safe.
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global APPCONFIGS
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APPCONFIGS = {}
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def load_app(conf, indexer=None, storage=None,
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not_implemented_middleware=True):
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global APPCONFIGS
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# NOTE(sileht): We load config, storage and indexer,
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# so all
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if not storage:
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storage = gnocchi_storage.get_driver(conf)
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if not indexer:
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indexer = gnocchi_indexer.get_driver(conf)
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indexer.connect()
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# Build the WSGI app
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cfg_path = conf.api.paste_config
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if not os.path.isabs(cfg_path):
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cfg_path = conf.find_file(cfg_path)
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if cfg_path is None or not os.path.exists(cfg_path):
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LOG.debug("No api-paste configuration file found! Using default.")
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cfg_path = pkg_resources.resource_filename(__name__, "api-paste.ini")
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config = dict(conf=conf, indexer=indexer, storage=storage,
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not_implemented_middleware=not_implemented_middleware)
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configkey = str(uuid.uuid4())
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APPCONFIGS[configkey] = config
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LOG.info("WSGI config used: %s", cfg_path)
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if conf.api.auth_mode == "noauth":
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warnings.warn("The `noauth' authentication mode is deprecated",
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category=DeprecationWarning)
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appname = "gnocchi+" + conf.api.auth_mode
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app = deploy.loadapp("config:" + cfg_path, name=appname,
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global_conf={'configkey': configkey})
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return cors.CORS(app, conf=conf)
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def _setup_app(root, conf, indexer, storage, not_implemented_middleware):
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app = pecan.make_app(
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root,
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hooks=(GnocchiHook(storage, indexer, conf),),
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guess_content_type_from_ext=False,
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)
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if not_implemented_middleware:
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app = webob.exc.HTTPExceptionMiddleware(NotImplementedMiddleware(app))
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return app
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def app_factory(global_config, **local_conf):
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global APPCONFIGS
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appconfig = APPCONFIGS.get(global_config.get('configkey'))
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return _setup_app(root=local_conf.get('root'), **appconfig)
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def build_wsgi_app():
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return load_app(service.prepare_service())
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