106 lines
3.2 KiB
Python
106 lines
3.2 KiB
Python
# Copyright (c) 2013 Mirantis 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 gettext
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import json
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import sys
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import eventlet
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from eventlet import wsgi
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from oslo_config import cfg
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from oslo_log import log as logging
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gettext.install('blazar', unicode=1)
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from blazar.api.v1 import app as v1_app
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from blazar.api.v2 import app as v2_app
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from blazar.utils import service as service_utils
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opts = [
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cfg.IntOpt('port', default=1234,
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help='Port that will be used to listen on'),
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]
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api_opts = [
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cfg.BoolOpt('enable_v1_api',
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default=True,
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help='Deploy the v1 API.'),
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]
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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CONF.register_cli_opts(opts)
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CONF.register_opts(api_opts)
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CONF.import_opt('host', 'blazar.config')
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class VersionSelectorApplication(object):
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"""Maps WSGI versioned apps and defines default WSGI app."""
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def __init__(self):
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self._status = ''
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self._response_headers = []
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self.v1 = v1_app.make_app()
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self.v2 = v2_app.make_app()
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def _append_versions_from_app(self, versions, app, environ):
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tmp_versions = app(environ, self.internal_start_response)
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if self._status.startswith("300"):
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tmp_versions = json.loads("".join(tmp_versions))
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versions['versions'].extend(tmp_versions['versions'])
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def internal_start_response(self, status, response_headers, exc_info=None):
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self._status = status
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self._response_headers = response_headers
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def __call__(self, environ, start_response):
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self._status = ''
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self._response_headers = []
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if environ['PATH_INFO'] == '/' or environ['PATH_INFO'] == '/versions':
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versions = {'versions': []}
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self._append_versions_from_app(versions, self.v1, environ)
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self._append_versions_from_app(versions, self.v2, environ)
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if len(versions['versions']):
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start_response("300 Multiple Choices",
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[("Content-Type", "application/json")])
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return [json.dumps(versions)]
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else:
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start_response("204 No Content", [])
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return []
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else:
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if environ['PATH_INFO'].startswith('/v1'):
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return self.v1(environ, start_response)
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return self.v2(environ, start_response)
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def main():
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"""Entry point to start Blazar API wsgi server."""
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cfg.CONF(sys.argv[1:], project='blazar', prog='blazar-api')
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service_utils.prepare_service(sys.argv)
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if not CONF.enable_v1_api:
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app = v2_app.make_app()
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else:
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app = VersionSelectorApplication()
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wsgi.server(eventlet.listen((CONF.host, CONF.port), backlog=500), app)
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if __name__ == '__main__':
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main()
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