# HG changeset patch
# User Sverre Rabbelier <srabbelier@gmail.com>
# Date 1252710324 -7200
# Node ID 6c8ba67289a655d2ccd13c57c6380cbabcf24689
# Parent  c9a723492dd5fe775781b7c1cc3cd9dad0492eec
Add ExceptionHandlerMiddleware

Based on the existing view decorator.

diff -r c9a723492dd5 -r 6c8ba67289a6 app/soc/middleware/exception_handler.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/soc/middleware/exception_handler.py	Sat Sep 12 01:05:24 2009 +0200
@@ -0,0 +1,58 @@
+#!/usr/bin/python2.5
+#
+# Copyright 2009 the Melange authors.
+#
+# 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.
+
+"""Middleware to handle exceptions.
+"""
+
+__authors__ = [
+  '"Sverre Rabbelier" <sverre@rabbelier.nl>',
+  ]
+
+
+import logging
+
+from google.appengine.runtime import DeadlineExceededError
+from google.appengine.runtime.apiproxy_errors import CapabilityDisabledError
+
+from django import http
+
+from soc.views.helper import responses
+from soc.views import out_of_band
+
+
+class ExceptionHandlerMiddleware(object):
+  """Middleware class to handle exceptions..
+  """
+
+  def process_exception(self, request, exception):
+    template = None
+    context = responses.getUniversalContext(request)
+
+    if isinstance(exception, DeadlineExceededError):
+      template = 'soc/deadline_exceeded.html'
+    if isinstance(exception, MemoryError):
+      template = 'soc/memory_error.html'
+    if isinstance(exception, AssertionError):
+      template = 'soc/assertion_error.html'
+    if isinstance(exception, out_of_band.Error):
+      return responses.errorResponse(error, request)
+
+    if template:
+      logging.exception(exception)
+      return responses.respond(request, template, context=context)
+
+    # let Django handle it
+    return None