76 lines
2.2 KiB
Python
76 lines
2.2 KiB
Python
# Copyright 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 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 pecan
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from pecan import hooks
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from ironic_python_agent.api import config
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class AgentHook(hooks.PecanHook):
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"""Hook to attach agent instance to API requests."""
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def __init__(self, agent, *args, **kwargs):
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super(AgentHook, self).__init__(*args, **kwargs)
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self.agent = agent
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def before(self, state):
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state.request.agent = self.agent
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def get_pecan_config():
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"""Set up the pecan configuration.
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:returns: pecan configuration object.
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"""
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filename = config.__file__.replace('.pyc', '.py')
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filename = filename.replace('.pyo', '.py')
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return pecan.configuration.conf_from_file(filename)
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def setup_app(pecan_config=None, agent=None):
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"""Set up the API app.
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:param pecan_config: a pecan configuration object.
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:param agent: an :class:`ironic_python_agent.agent.IronicPythonAgent`
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instance.
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:returns: wsgi app object.
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"""
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app_hooks = [AgentHook(agent)]
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if not pecan_config:
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pecan_config = get_pecan_config()
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pecan.configuration.set_config(dict(pecan_config), overwrite=True)
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app = pecan.make_app(
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pecan_config.app.root,
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static_root=pecan_config.app.static_root,
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debug=pecan_config.app.debug,
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force_canonical=getattr(pecan_config.app, 'force_canonical', True),
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hooks=app_hooks,
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)
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return app
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class VersionSelectorApplication(object):
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"""WSGI application that handles multiple API versions."""
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def __init__(self, agent):
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pc = get_pecan_config()
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self.v1 = setup_app(pecan_config=pc, agent=agent)
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def __call__(self, environ, start_response):
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return self.v1(environ, start_response)
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