From ec52dfd5fa9b3c9c205fb62c0f051d642639942f Mon Sep 17 00:00:00 2001
From: Andrew Weiss <wvvwwvw@gmail.com>
Date: Thu, 14 Jun 2018 12:12:21 -0700
Subject: [PATCH] Django middlewares that differentiate between 404 and other
 exceptions

---
 rollbar/contrib/django/middleware.py | 43 ++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/rollbar/contrib/django/middleware.py b/rollbar/contrib/django/middleware.py
index 9816d168..199cc3a8 100644
--- a/rollbar/contrib/django/middleware.py
+++ b/rollbar/contrib/django/middleware.py
@@ -105,6 +105,49 @@ def new_get_traceback_data(exception_reporter):
     debug.ExceptionReporter.get_traceback_data = new_get_traceback_data
 
 
+def _should_ignore_404(url):
+    url_patterns = getattr(settings, 'ROLLBAR', {}).get('ignorable_404_urls', ())
+    return any(p.search(url) for p in url_patterns)
+
+
+class RollbarNotifierMiddlewareOnly404(MiddlewareMixin):
+    def get_extra_data(self, request, exc):
+        return
+
+    def get_payload_data(self, request, exc):
+        return
+
+    def process_response(self, request, response):
+        if response.status_code != 404:
+            return response
+
+        if _should_ignore_404(request.get_full_path()):
+            return response
+
+        try:
+            if hasattr(request, '_rollbar_notifier_original_http404_exc_info'):
+                exc_type, exc_value, exc_traceback = request._rollbar_notifier_original_http404_exc_info
+                raise exc_type, exc_value, exc_traceback
+            else:
+                raise Http404()
+        except Exception as exc:
+            rollbar.report_exc_info(
+                sys.exc_info(),
+                request,
+                extra_data=self.get_extra_data(request, exc),
+                payload_data=self.get_payload_data(request, exc),
+            )
+        return response
+
+
+class RollbarNotifierMiddlewareExcluding404(RollbarNotifierMiddleware):
+    def process_exception(self, request, exc):
+        if isinstance(exc, Http404):
+            request._rollbar_notifier_original_http404_exc_info = sys.exc_info()
+        else:
+            super(RollbarNotifierMiddlewareExcluding404, self).process_exception(request, exc)
+
+
 class RollbarNotifierMiddleware(MiddlewareMixin):
     def __init__(self, get_response=None):
         super(RollbarNotifierMiddleware, self).__init__(get_response)