Root cause: upstream_request_filter was inserting x-forwarded-proto with
a raw headers.insert() call (via DerefMut) which only updates base.headers
but NOT the CaseMap. header_to_h1_wire zips CaseMap with base.headers, so
headers added without a CaseMap entry are silently dropped on the wire.
Fix: use insert_header() which keeps both maps in sync.
Also adds:
- src/lib.rs + [lib] section: exposes SunbeamProxy/RouteConfig/AcmeRoutes
to integration tests without re-declaring modules in main.rs
- tests/e2e.rs: real end-to-end test — starts a SunbeamProxy over plain
HTTP, routes it to a TCP echo backend, and asserts x-forwarded-proto: http
is present in the upstream request headers
- Updated unit tests to verify header_to_h1_wire round-trip (not just that
HeaderMap::insert works in isolation)
Signed-off-by: Sienna Meridian Satterwhite <sienna@sunbeam.pt>
