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Classic298
72fdf238a8
Swap the JSON encoder/decoder used across the backend from stdlib json to orjson when ENABLE_ORJSON is set — HTTP request bodies, JSONResponse bodies, upstream provider responses, SSE chunks, and socket.io/Redis payloads. The flag defaults to off, in which case the app uses stdlib json and engineio's codec verbatim, so default behaviour is unchanged. - json_codec exports JSONCodec (stdlib json or the orjson codec) and SOCKETIO_JSON (engineio's codec or the orjson codec); call sites import JSONCodec and stay implementation-agnostic - apply_orjson_http_json() is a no-op when the flag is off, leaving starlette's Request.json / JSONResponse.render untouched - the orjson codec falls back to the stdlib for inputs orjson rejects (non-str dict keys, ints beyond 64 bits, NaN literals) - orjson is imported only when the flag is on - FastAPI(default_response_class=...) is deliberately not used: an explicit default disables the Pydantic direct-to-bytes fast path for response_model routes