bug(flask): Transactions missing body (#1034)

* Add test that ensreus transaction includes body data even if no exception was raised

* Removed weakref to request that was being gc before it was passed to event_processor

* fix: Formatting

* Linting fixes

Co-authored-by: sentry-bot <markus+ghbot@sentry.io>

Author: ahmedetefy

sentry_sdk/integrations/flask.py

@@ -1,7 +1,5 @@
 from __future__ import absolute_import
 
-import weakref
-
 from sentry_sdk.hub import Hub, _should_send_default_pii
 from sentry_sdk.utils import capture_internal_exceptions, event_from_exception
 from sentry_sdk.integrations import Integration, DidNotEnable
@@ -113,10 +111,7 @@ def _request_started(sender, **kwargs):
         except Exception:
             pass
 
-        weak_request = weakref.ref(request)
-        evt_processor = _make_request_event_processor(
-            app, weak_request, integration  # type: ignore
-        )
+        evt_processor = _make_request_event_processor(app, request, integration)
         scope.add_event_processor(evt_processor)
 
 
@@ -157,11 +152,11 @@ def size_of_file(self, file):
         return file.content_length
 
 
-def _make_request_event_processor(app, weak_request, integration):
+def _make_request_event_processor(app, request, integration):
     # type: (Flask, Callable[[], Request], FlaskIntegration) -> EventProcessor
+
     def inner(event, hint):
         # type: (Dict[str, Any], Dict[str, Any]) -> Dict[str, Any]
-        request = weak_request()
 
         # if the request is gone we are fine not logging the data from
         # it.  This might happen if the processor is pushed away to

tests/integrations/flask/test_flask.py

@@ -332,6 +332,39 @@ def index():
     assert len(event["request"]["data"]["foo"]) == 512
 
 
+def test_flask_formdata_request_appear_transaction_body(
+    sentry_init, capture_events, app
+):
+    """
+    Test that ensures that transaction request data contains body, even if no exception was raised
+    """
+    sentry_init(integrations=[flask_sentry.FlaskIntegration()], traces_sample_rate=1.0)
+
+    data = {"username": "sentry-user", "age": "26"}
+
+    @app.route("/", methods=["POST"])
+    def index():
+        assert request.form["username"] == data["username"]
+        assert request.form["age"] == data["age"]
+        assert not request.get_data()
+        assert not request.get_json()
+        set_tag("view", "yes")
+        capture_message("hi")
+        return "ok"
+
+    events = capture_events()
+
+    client = app.test_client()
+    response = client.post("/", data=data)
+    assert response.status_code == 200
+
+    event, transaction_event = events
+
+    assert "request" in transaction_event
+    assert "data" in transaction_event["request"]
+    assert transaction_event["request"]["data"] == data
+
+
 @pytest.mark.parametrize("input_char", [u"a", b"a"])
 def test_flask_too_large_raw_request(sentry_init, input_char, capture_events, app):
     sentry_init(integrations=[flask_sentry.FlaskIntegration()], request_bodies="small")