76 lines
2.0 KiB
Python
76 lines
2.0 KiB
Python
#
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# Copyright (c) 2015-2018 Wind River Systems, Inc.
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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import os
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from oslo_config import cfg
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from paste import deploy
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from oslo_log import log as logging
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LOG = logging.getLogger(__name__)
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paste_deploy_opts = [
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cfg.StrOpt('api_paste_config',
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default='api-proxy-paste.ini',
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help='The API paste config file to use.')]
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CONF = cfg.CONF
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CONF.register_opts(paste_deploy_opts)
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def parse_args(argv, default_config_files=None):
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CONF(argv[1:],
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project='api-proxy',
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version='1.0',
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default_config_files=default_config_files)
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def paste_deploy_app(paste_config_file, app_name, conf):
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"""Load a WSGI app from a PasteDeploy configuration.
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Use deploy.loadapp() to load the app from the PasteDeploy configuration,
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ensuring that the supplied ConfigOpts object is passed to the app and
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filter constructors.
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:param paste_config_file: a PasteDeploy config file
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:param app_name: the name of the app/pipeline to load from the file
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:param conf: a ConfigOpts object to supply to the app and its filters
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:returns: the WSGI app
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"""
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return deploy.loadapp("config:%s" % paste_config_file, name=app_name)
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def _get_paste_config_file():
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"""
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Retrieve the paste_config_file config item, formatted as an
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absolute pathname.
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"""
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config_path = CONF.find_file(CONF.api_paste_config)
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if config_path is None:
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return None
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return os.path.abspath(config_path)
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def load_paste_app(app_name=None):
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"""
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Loads a WSGI app from a paste config file.
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"""
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if app_name is None:
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app_name = CONF.prog
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conf_file = _get_paste_config_file()
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LOG.info("Load application: config: (%s), app: (%s)" % (conf_file,
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app_name))
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if conf_file is None:
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raise RuntimeError("Unable to locate config file")
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try:
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app = paste_deploy_app(conf_file, app_name, CONF)
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return app
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except LookupError as err:
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LOG.info("got lookup error: %s" % err)
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