Initial commit

backend/app/services/sse.py

@@ -0,0 +1,13 @@
+from __future__ import annotations
+
+import json
+from collections.abc import AsyncIterator
+from typing import Any
+
+
+def event(name: str, data: dict[str, Any]) -> bytes:
+    return f"event: {name}\ndata: {json.dumps(data, ensure_ascii=False)}\n\n".encode("utf-8")
+
+
+async def one_event(name: str, data: dict[str, Any]) -> AsyncIterator[bytes]:
+    yield event(name, data)