68d0cdf2a2
Adds a minimal Http3GetClient (in :quic-interop, NOT :quic — interop-test
surface, not a production HTTP/3 client) that opens the three required
client uni streams (control + QPACK encoder + QPACK decoder per RFC 9114
§6.2.1), sends an empty SETTINGS, and per request opens a bidi stream,
encodes the four pseudo-headers via the existing literal-only QpackEncoder,
FINs, and reassembles HEADERS+DATA frames from the response.
Wires three testcases:
- transfer: GET each REQUESTS URL sequentially, write body to
\$DOWNLOADS/<basename>. status != 200 fails.
- http3: identical to transfer.
- multiplexing: same fetches but issued in parallel via
coroutineScope { async { … } } so request streams genuinely
overlap on the wire (what tshark verifies).
Out-of-scope (deliberate): GOAWAY, PUSH_PROMISE, dynamic QPACK table,
trailers, priority — none are required by these testcases.
Unit-tests round-trip the request encoding through the existing
Http3FrameReader + QpackDecoder so the wire format is verified without
needing a real peer.
https://claude.ai/code/session_01HcvfQq1ttPV9PkRoJb4nyT