Refs #26601 -- Improved backwards-compatibility of DEP 5 middleware exception handling.

tests/middleware_exceptions/middleware.py

@@ -1,10 +1,58 @@
 from __future__ import unicode_literals
 
-from django.http import HttpResponse
-from django.utils.deprecation import MiddlewareMixin
+from django.http import Http404, HttpResponse
+from django.template import engines
+
+log = []
 
 
-class ProcessExceptionMiddleware(MiddlewareMixin):
+class BaseMiddleware(object):
+    def __init__(self, get_response):
+        self.get_response = get_response
 
+    def __call__(self, request):
+        return self.get_response(request)
+
+
+class ProcessExceptionMiddleware(BaseMiddleware):
     def process_exception(self, request, exception):
         return HttpResponse('Exception caught')
+
+
+class ProcessExceptionLogMiddleware(BaseMiddleware):
+    def process_exception(self, request, exception):
+        log.append('process-exception')
+
+
+class ProcessExceptionExcMiddleware(BaseMiddleware):
+    def process_exception(self, request, exception):
+        raise Exception('from process-exception')
+
+
+class ProcessViewMiddleware(BaseMiddleware):
+    def process_view(self, request, view_func, view_args, view_kwargs):
+        return HttpResponse('Processed view %s' % view_func.__name__)
+
+
+class ProcessViewNoneMiddleware(BaseMiddleware):
+    def process_view(self, request, view_func, view_args, view_kwargs):
+        log.append('processed view %s' % view_func.__name__)
+        return None
+
+
+class TemplateResponseMiddleware(BaseMiddleware):
+    def process_template_response(self, request, response):
+        response.template_name = engines['django'].from_string('template-response middleware')
+        return response
+
+
+class LogMiddleware(BaseMiddleware):
+    def __call__(self, request):
+        response = self.get_response(request)
+        log.append((response.status_code, response.content))
+        return response
+
+
+class NotFoundMiddleware(BaseMiddleware):
+    def __call__(self, request):
+        raise Http404('not found')