History panel: Do not crash when receiving invalid JSON

debug_toolbar/panels/history/panel.py

@@ -49,7 +49,10 @@ def generate_stats(self, request, response):
                 and request.body
                 and request.META.get("CONTENT_TYPE") == "application/json"
             ):
-                data = json.loads(request.body)
+                try:
+                    data = json.loads(request.body)
+                except ValueError:
+                    pass
         except RawPostDataException:
             # It is not guaranteed that we may read the request data (again).
             data = None

docs/changes.rst

@@ -5,6 +5,12 @@ unreleased
 ----------
 
 * Moved CI to GitHub Actions: https://github.com/jazzband/django-debug-toolbar/actions
+* Stopped crashing when ``request.GET`` and ``request.POST`` are
+  dictionaries instead of ``QueryDict`` instances. This isn't a valid
+  use of Django but django-debug-toolbar shouldn't crash anyway.
+* Fixed a crash in the history panel when sending a  JSON POST request
+  with invalid JSON.
+
 
 3.2a1 (2020-10-19)
 ------------------

tests/panels/test_history.py

@@ -30,7 +30,8 @@ def test_post(self):
     def test_post_json(self):
         for data, expected_stats_data in (
             ({"foo": "bar"}, {"foo": "bar"}),
-            ("", {}),
+            ("", {}),  # Empty JSON
+            ("'", {}),  # Invalid JSON
         ):
             with self.subTest(data=data):
                 self.request = rf.post(