Interface HttpRequest

Optional request body (already serialised).

Hard cap on the response body size in bytes; the request aborts if exceeded.

Always "manual" from the engine: a transport must not follow redirects but return the 3xx as it came (fetch(url, { redirect: req.redirect })). The engine follows them itself and decides per hop where credentials may go; a response whose url shows the transport went to another origin is rejected.

Aborted when the engine's time limit (timeoutMs) passes. A transport should stop the request then (fetch(url, { signal })); the engine rejects at the deadline either way, and enforces maxResponseBytes on the body it gets back, so neither limit depends on the transport.

Per-request timeout in milliseconds, whole response included.

Fully-qualified absolute URL.