wip: http backend with callbacks

..currently all callbacks are executed non-async for testing
..they may be bugs with async downloads not correctly being waited for
..there may be problems with binding changing variables correctly

statekeeper.py

@@ -7,14 +7,16 @@ def add_to_download_queue(url, path):
 
 def add_to_task_queue(task):
     '''Add a callback to background execution queue'''
+    print("Executing tasks", task)
     task()
 
 def _download(url, path):
 
-    response = requests.get(url + path, stream=True)
+    response = requests.get(url + "?path=" + path, stream=True)
 
     # Check if the request was successful
     if response.status_code == 200:
+
         # Save the file locally
         local_filename = os.path.join("./cache", path)
 
@@ -22,4 +24,8 @@ def _download(url, path):
             for chunk in response.iter_content(chunk_size=8192):  # Download in chunks
                 f.write(chunk)
 
-        print(f"File downloaded successfully as {local_filename}")
+        print(f"File downloaded successfully as {local_filename}")
+    
+    else:
+
+        raise AssertionError("Non-200 Response for:", url, path, response.status_code, response.text)