Add span for Django SimpleTemplateResponse rendering (#1818)

sentry_sdk/consts.py

@@ -71,6 +71,7 @@ class OP:
     SUBPROCESS_COMMUNICATE = "subprocess.communicate"
     TEMPLATE_RENDER = "template.render"
     VIEW_RENDER = "view.render"
+    VIEW_RESPONSE_RENDER = "view.response.render"
     WEBSOCKET_SERVER = "websocket.server"
 
 

sentry_sdk/integrations/django/views.py

@@ -23,9 +23,19 @@ def patch_views():
     # type: () -> None
 
     from django.core.handlers.base import BaseHandler
+    from django.template.response import SimpleTemplateResponse
     from sentry_sdk.integrations.django import DjangoIntegration
 
     old_make_view_atomic = BaseHandler.make_view_atomic
+    old_render = SimpleTemplateResponse.render
+
+    def sentry_patched_render(self):
+        # type: (SimpleTemplateResponse) -> Any
+        hub = Hub.current
+        with hub.start_span(
+            op=OP.VIEW_RESPONSE_RENDER, description="serialize response"
+        ):
+            return old_render(self)
 
     @_functools.wraps(old_make_view_atomic)
     def sentry_patched_make_view_atomic(self, *args, **kwargs):
@@ -54,6 +64,7 @@ def sentry_patched_make_view_atomic(self, *args, **kwargs):
 
         return sentry_wrapped_callback
 
+    SimpleTemplateResponse.render = sentry_patched_render
     BaseHandler.make_view_atomic = sentry_patched_make_view_atomic
 
 

tests/integrations/django/myapp/urls.py

@@ -80,6 +80,9 @@ def path(path, *args, **kwargs):
         )
     )
     urlpatterns.append(path("rest-hello", views.rest_hello, name="rest_hello"))
+    urlpatterns.append(
+        path("rest-json-response", views.rest_json_response, name="rest_json_response")
+    )
     urlpatterns.append(
         path(
             "rest-permission-denied-exc",

tests/integrations/django/myapp/views.py

@@ -11,6 +11,7 @@
 
 try:
     from rest_framework.decorators import api_view
+    from rest_framework.response import Response
 
     @api_view(["POST"])
     def rest_framework_exc(request):
@@ -29,6 +30,10 @@ def rest_hello(request):
     def rest_permission_denied_exc(request):
         raise PermissionDenied("bye")
 
+    @api_view(["GET"])
+    def rest_json_response(request):
+        return Response(dict(ok=True))
+
 except ImportError:
     pass
 

tests/integrations/django/test_basic.py

@@ -300,6 +300,25 @@ def test_sql_dict_query_params(sentry_init, capture_events):
     assert crumb["data"]["db.params"] == {"my_foo": 10}
 
 
+@pytest.mark.forked
+@pytest_mark_django_db_decorator()
+def test_response_trace(sentry_init, client, capture_events, render_span_tree):
+    pytest.importorskip("rest_framework")
+    sentry_init(
+        integrations=[DjangoIntegration()],
+        traces_sample_rate=1.0,
+    )
+
+    events = capture_events()
+    content, status, headers = client.get(reverse("rest_json_response"))
+    assert status == "200 OK"
+
+    assert (
+        '- op="view.response.render": description="serialize response"'
+        in render_span_tree(events[0])
+    )
+
+
 @pytest.mark.parametrize(
     "query",
     [