hyper_websocket_lite/
lib.rs1#![warn(missing_docs)]
2#![warn(rust_2018_idioms)]
3
4use std::future::Future;
7
8use hyper::header::{self, HeaderValue};
9use hyper::upgrade::Upgraded;
10use hyper::{Body, Request, Response, StatusCode};
11use tokio::task;
12use tokio_util::codec::{Decoder, Framed};
13use websocket_codec::{ClientRequest, MessageCodec};
14
15pub use websocket_codec::Result;
16
17pub type AsyncClient = Framed<Upgraded, MessageCodec>;
19
20pub async fn server_upgrade<OnClient, F>(req: Request<Body>, on_client: OnClient) -> Result<Response<Body>>
22where
23 OnClient: FnOnce(AsyncClient) -> F + Send + 'static,
24 F: Future<Output = ()> + Send,
25{
26 let mut res = Response::new(Body::empty());
27
28 let ws_accept = if let Ok(req) = ClientRequest::parse(|name| {
29 let h = req.headers().get(name)?;
30 h.to_str().ok()
31 }) {
32 req.ws_accept()
33 } else {
34 *res.status_mut() = StatusCode::BAD_REQUEST;
35 return Ok(res);
36 };
37
38 task::spawn(async move {
39 match hyper::upgrade::on(req).await {
40 Ok(upgraded) => {
41 let client = MessageCodec::server().framed(upgraded);
42 on_client(client).await;
43 }
44 Err(e) => eprintln!("upgrade error: {}", e),
45 }
46 });
47
48 *res.status_mut() = StatusCode::SWITCHING_PROTOCOLS;
49
50 let headers = res.headers_mut();
51 headers.insert(header::UPGRADE, HeaderValue::from_static("websocket"));
52 headers.insert(header::CONNECTION, HeaderValue::from_static("Upgrade"));
53 headers.insert(header::SEC_WEBSOCKET_ACCEPT, HeaderValue::from_str(&ws_accept).unwrap());
54 Ok(res)
55}