Expand description
Streaming HTTP response bodies (feature #70).
A normal umbral handler returns a fully-buffered String / Html /
Json. That’s fine for a page, but a 200 MB CSV export or a file
download shouldn’t sit in memory all at once. StreamingResponse
sends the body chunk-by-chunk from an async Stream, so memory stays
flat regardless of payload size and the client starts receiving bytes
before the last row is generated.
Pairs with AppBuilder::compression:
a streamed body is gzip/brotli-compressed on the fly by the same layer,
so ?format=csv over a million rows streams and compresses without
buffering.
Structs§
- Streaming
Response - A response whose body is produced incrementally from an async stream.