48 lines
1.5 KiB
Python
48 lines
1.5 KiB
Python
# Copyright (c) 2013 NEC Corporation
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# All Rights Reserved.
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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 logging
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import re
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import webob.dec
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import webob.exc
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from oslo_middleware._i18n import _LE
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from oslo_middleware import base
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LOG = logging.getLogger(__name__)
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_TOKEN_RE = re.compile('^(X-\w+-Token):.*$', flags=re.MULTILINE)
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class CatchErrors(base.ConfigurableMiddleware):
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"""Middleware that provides high-level error handling.
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It catches all exceptions from subsequent applications in WSGI pipeline
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to hide internal errors from API response.
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"""
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@webob.dec.wsgify
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def __call__(self, req):
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try:
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response = req.get_response(self.application)
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except Exception:
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req_str = _TOKEN_RE.sub(r'\1: <removed>', req.as_text())
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LOG.exception(_LE('An error occurred during '
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'processing the request: %s'), req_str)
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response = webob.exc.HTTPInternalServerError()
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return response
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