chore: import upstream snapshot with attribution

python/sglang/srt/utils/json_response.py

@@ -0,0 +1,30 @@
+"""Utilities for JSON serialization in HTTP responses."""
+
+from typing import Any
+
+import orjson
+from fastapi.responses import Response
+
+# Keep response serialization behavior consistent across endpoints:
+# - Support non-string dictionary keys used in some metadata payloads.
+# - Support numpy scalars/arrays without pre-conversion.
+ORJSON_RESPONSE_OPTIONS = orjson.OPT_NON_STR_KEYS | orjson.OPT_SERIALIZE_NUMPY
+
+
+def dumps_json(content: Any) -> bytes:
+    """Serialize content to JSON bytes using SGLang's ORJSON options."""
+    return orjson.dumps(content, option=ORJSON_RESPONSE_OPTIONS)
+
+
+class SGLangORJSONResponse(Response):
+    """ORJSON response with SGLang-specific serialization options."""
+
+    media_type = "application/json"
+
+    def render(self, content: Any) -> bytes:
+        return dumps_json(content)
+
+
+def orjson_response(content: Any, status_code: int = 200) -> Response:
+    """Create a JSON response with stable ORJSON serialization options."""
+    return SGLangORJSONResponse(content=content, status_code=status_code)