Fixed HttpClient session not being closed

pylib/anki/httpclient.py

@@ -28,6 +28,20 @@ class HttpClient:
         self.progress_hook = progress_hook
         self.session = requests.Session()
 
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *args):
+        self.close()
+
+    def close(self):
+        if self.session:
+            self.session.close()
+            self.session = None
+
+    def __del__(self):
+        self.close()
+
     def post(self, url: str, data: Any, headers: Optional[Dict[str, str]]) -> Response:
         data = _MonitoringFile(
             data, hook=self.progress_hook

qt/aqt/editor.py

@@ -803,6 +803,7 @@ to a cloze type first, via Edit>Change Note Type."""
             local = False
         # fetch it into a temporary folder
         self.mw.progress.start(immediate=not local, parent=self.parentWindow)
+        r = None
         ct = None
         error_msg: Optional[str] = None
         try:
@@ -825,6 +826,8 @@ to a cloze type first, via Edit>Change Note Type."""
             error_msg = _("An error occurred while opening %s") % e
             return
         finally:
+            if r:
+                r.close()
             self.mw.progress.finish()
             if error_msg:
                 showWarning(error_msg)