OAI: Add cancellation with inline load

When the request is cancelled, cancel the load task. In addition,
when checking if a model container exists, also check if the model
is fully loaded.

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

endpoints/OAI/router.py

@@ -55,7 +55,14 @@ async def completion_request(
     """
 
     if data.model:
-        await load_inline_model(data.model, request)
+        inline_load_task = asyncio.create_task(load_inline_model(data.model, request))
+
+        await run_with_request_disconnect(
+            request,
+            inline_load_task,
+            disconnect_message=f"Model switch for generation {request.state.id} "
+            + "cancelled by user.",
+        )
     else:
         await check_model_container()
 

endpoints/OAI/utils/completion.py

@@ -112,8 +112,12 @@ async def _stream_collector(
 async def load_inline_model(model_name: str, request: Request):
     """Load a model from the data.model parameter"""
 
-    # Return if the model container already exists
-    if model.container and model.container.model_dir.name == model_name:
+    # Return if the model container already exists and the model is fully loaded
+    if (
+        model.container
+        and model.container.model_dir.name == model_name
+        and model.container.model_loaded
+    ):
         return
 
     # Inline model loading isn't enabled or the user isn't an admin