1 files changed, 43 insertions, 0 deletions
diff --git a/oslo_middleware/catch_errors.py b/oslo_middleware/catch_errors.py
new file mode 100644
index 0000000..89b4bd9
--- /dev/null
+++ b/oslo_middleware/catch_errors.py
@@ -0,0 +1,43 @@
+# Copyright (c) 2013 NEC Corporation
+# All Rights Reserved.
+#
+#    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.
+
+import logging
+
+import webob.dec
+import webob.exc
+
+from oslo_middleware import base
+from oslo_middleware.i18n import _LE
+
+
+LOG = logging.getLogger(__name__)
+
+
+class CatchErrors(base.Middleware):
+    """Middleware that provides high-level error handling.
+
+    It catches all exceptions from subsequent applications in WSGI pipeline
+    to hide internal errors from API response.
+    """
+
+    @webob.dec.wsgify
+    def __call__(self, req):
+        try:
+            response = req.get_response(self.application)
+        except Exception:
+            LOG.exception(_LE('An error occurred during '
+                              'processing the request: %s'))
+            response = webob.exc.HTTPInternalServerError()
+        return response