Improve empty choices handling in streaming chunks (#131)

Author: PeterDaveHello

app/openai_ops.py

@@ -319,9 +319,12 @@ def consume_openai_stream_to_write_reply(
             spent_seconds = time.time() - start_time
             if timeout_seconds < spent_seconds:
                 raise TimeoutError()
-            # Some versions of the Azure OpenAI API return an empty choices array in the first chunk
-            if context.get("OPENAI_API_TYPE") == "azure" and not chunk.choices:
+            # Streaming may emit control/usage/keep-alive chunks without choices,
+            # so guard before indexing
+            if not chunk.choices:
+                logging.debug("Stream chunk missing choices; skipping")
                 continue
+
             item = chunk.choices[0].model_dump()
             if item.get("finish_reason") is not None:
                 finish_reason = item.get("finish_reason")