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# Copyright (c) 2010 OpenStack, LLC.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from webob import Request
from webob.exc import HTTPServerError
from swift.common.utils import get_logger
class CatchErrorMiddleware(object):
"""
Middleware that provides high-level error handling.
"""
def __init__(self, app, conf):
self.app = app
self.logger = get_logger(conf)
def __call__(self, env, start_response):
try:
return self.app(env, start_response)
except Exception, err:
self.logger.exception(_('Error: %s'), err)
resp = HTTPServerError(request=Request(env),
body='An error occurred',
content_type='text/plain')
return resp(env, start_response)
def filter_factory(global_conf, **local_conf):
conf = global_conf.copy()
conf.update(local_conf)
def except_filter(app):
return CatchErrorMiddleware(app, conf)
return except_filter
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