Added cursors/push-ttl endpoint.

app/cursors.py

@@ -76,3 +76,18 @@ async def close_cursor(cursor_id: str) -> None:
 
     await cached_cursor.close()
     del mysql.cached_cursors[cursor_id]
+
+
+@router.post(
+    "push-ttl/{cursor_id}",
+    dependencies=[Depends(get_current_user)],
+    status_code=status.HTTP_200_OK,
+)
+async def cursor_push_ttl(cursor_id: str, new_ttl: int|None=None) -> CachedCursorOut:
+    cached_cursor = mysql.cached_cursors.get(cursor_id, None)
+    if cached_cursor is None:
+        raise CursorNotFound
+    cached_cursor.ttl = new_ttl if new_ttl else cached_cursor.ttl
+    cached_cursor.close_at = cached_cursor.upgrade_close_at()
+    return cached_cursor
+