OAI: Switch to background task for disconnect checks

Waiting for request disconnect takes some extra time and allows
generation chunks to pile up, resulting in large payloads being sent
at once not making up a smooth stream.

Use the polling method in non-streaming requests by creating a background
task and then check if the task is done, signifying that the request
has been disconnected.

Signed-off-by: kingbri <bdashore3@proton.me>

endpoints/OAI/utils/chat_completion.py

@@ -15,6 +15,7 @@ from common.networking import (
     get_generator_error,
     handle_request_disconnect,
     handle_request_error,
+    request_disconnect_loop,
 )
 from common.utils import unwrap
 from endpoints.OAI.types.chat_completion import (
@@ -204,10 +205,13 @@ async def stream_generate_chat_completion(
         new_generation = model.container.generate_gen(
             prompt, abort_event, **data.to_gen_params()
         )
+        # Create a background task to avoid blocking the loop
+        disconnect_task = asyncio.create_task(request_disconnect_loop(request))
+
         async for generation in new_generation:
             # Sometimes this fires, and sometimes a CancelledError will fire
             # Keep both implementations in to avoid the headache
-            if await request.is_disconnected():
+            if disconnect_task.done():
                 abort_event.set()
                 handle_request_disconnect("Completion generation cancelled by user.")