Description
Version
hyper 0.14.26, h2 0.3.19, http 0.2.9
Platform
Linux 5.15, Ubuntu 22.04
Description
In HTTP/1.1, when transfer-encoding: chunked is set, all the data should be sent at a format of chunk. However, in hyper, if the body part is empty, e.g. Body::empty() or Body::from_static(b""), hyper server doesn't send b"0\r\n\r\n" to the client, causing infitite wait on the client side. When the body contains some bytes, e.g. Body::from_static(b"0"), hyper will send a non-zero size chunk as well as a zero-size last chunk. According to pseudo code from RFC9112 7.1.3, zero size body should be allowed.
I expect hyper sends valid last chunk b"0\r\n\r\n" to the client when the body is empty. Manually sending it is impossible with public API so I have no workaround now.
Source code to reproduce the behavior:
async fn get_302() -> anyhow::Result<Response<Body>> {
let resp_builder = http::response::Builder::new();
let (mut parts, body) = resp_builder
.status(302)
.version(Version::HTTP_11)
.header(header::LOCATION, "127.0.0.1:1234/ok")
.header(header::TRANSFER_ENCODING, "chunked")
.body(Body::empty())
.unwrap().into_parts();
Ok(Response::from_parts(parts, body))
}
async fn run_server() {
let listener = TcpListener::bind("127.0.0.1:1234").await.unwrap();
let service = service_fn(|req| {
get_302()
});
while let (conn, _) = listener.accept().await.unwrap() {
let _ = Http::new().http1_only(true).serve_connection(conn, service).await;
}
}
#[tokio::main]
async fn main() {
run_server().await
}