Interface HttpRequest

Optional request body (already serialised).

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

Always "manual": a transport must NOT follow redirects. GENESIS credentials are custom headers (username, password), which fetch forwards to another origin on a redirect (it strips only Authorization); the engine answers a 3xx itself (as an error naming the canonical host). A fetch transport passes it on: fetch(req.url, { method, headers, body, redirect: req.redirect, signal: req.signal }).

Aborted when the engine's overall deadline (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.

Timeout for the whole request, response body included, in milliseconds.

Fully-qualified absolute URL.