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|
use std::{
cell::Cell,
convert::Infallible,
task::{Context, Poll},
};
use actix_codec::{AsyncRead, AsyncWrite, Framed};
use actix_http::{
body::{BodySize, BoxBody},
h1,
ws::{self, CloseCode, Frame, Item, Message},
Error, HttpService, Request, Response,
};
use actix_http_test::test_server;
use actix_service::{fn_factory, Service};
use bytes::Bytes;
use derive_more::{Display, Error, From};
use futures_core::future::LocalBoxFuture;
use futures_util::{SinkExt as _, StreamExt as _};
#[derive(Clone)]
struct WsService(Cell<bool>);
impl WsService {
fn new() -> Self {
WsService(Cell::new(false))
}
fn set_polled(&self) {
self.0.set(true);
}
fn was_polled(&self) -> bool {
self.0.get()
}
}
#[derive(Debug, Display, Error, From)]
enum WsServiceError {
#[display(fmt = "HTTP error")]
Http(actix_http::Error),
#[display(fmt = "WS handshake error")]
Ws(actix_http::ws::HandshakeError),
#[display(fmt = "I/O error")]
Io(std::io::Error),
#[display(fmt = "dispatcher error")]
Dispatcher,
}
impl From<WsServiceError> for Response<BoxBody> {
fn from(err: WsServiceError) -> Self {
match err {
WsServiceError::Http(err) => err.into(),
WsServiceError::Ws(err) => err.into(),
WsServiceError::Io(_err) => unreachable!(),
WsServiceError::Dispatcher => {
Response::internal_server_error().set_body(BoxBody::new(format!("{}", err)))
}
}
}
}
impl<T> Service<(Request, Framed<T, h1::Codec>)> for WsService
where
T: AsyncRead + AsyncWrite + Unpin + 'static,
{
type Response = ();
type Error = WsServiceError;
type Future = LocalBoxFuture<'static, Result<Self::Response, Self::Error>>;
fn poll_ready(&self, _: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
self.set_polled();
Poll::Ready(Ok(()))
}
fn call(&self, (req, mut framed): (Request, Framed<T, h1::Codec>)) -> Self::Future {
assert!(self.was_polled());
Box::pin(async move {
let res = ws::handshake(req.head())?.message_body(())?;
framed.send((res, BodySize::None).into()).await?;
let framed = framed.replace_codec(ws::Codec::new());
ws::Dispatcher::with(framed, service)
.await
.map_err(|_| WsServiceError::Dispatcher)?;
Ok(())
})
}
}
async fn service(msg: Frame) -> Result<Message, Error> {
let msg = match msg {
Frame::Ping(msg) => Message::Pong(msg),
Frame::Text(text) => Message::Text(String::from_utf8_lossy(&text).into_owned().into()),
Frame::Binary(bin) => Message::Binary(bin),
Frame::Continuation(item) => Message::Continuation(item),
Frame::Close(reason) => Message::Close(reason),
_ => return Err(ws::ProtocolError::BadOpCode.into()),
};
Ok(msg)
}
#[actix_rt::test]
async fn simple() {
let mut srv = test_server(|| {
HttpService::build()
.upgrade(fn_factory(|| async {
Ok::<_, Infallible>(WsService::new())
}))
.finish(|_| async { Ok::<_, Infallible>(Response::not_found()) })
.tcp()
})
.await;
// client service
let mut framed = srv.ws().await.unwrap();
framed.send(Message::Text("text".into())).await.unwrap();
let item = framed.next().await.unwrap().unwrap();
assert_eq!(item, Frame::Text(Bytes::from_static(b"text")));
framed.send(Message::Binary("text".into())).await.unwrap();
let item = framed.next().await.unwrap().unwrap();
assert_eq!(item, Frame::Binary(Bytes::from_static(&b"text"[..])));
framed.send(Message::Ping("text".into())).await.unwrap();
let item = framed.next().await.unwrap().unwrap();
assert_eq!(item, Frame::Pong("text".to_string().into()));
framed
.send(Message::Continuation(Item::FirstText("text".into())))
.await
.unwrap();
let item = framed.next().await.unwrap().unwrap();
assert_eq!(
item,
Frame::Continuation(Item::FirstText(Bytes::from_static(b"text")))
);
assert!(framed
.send(Message::Continuation(Item::FirstText("text".into())))
.await
.is_err());
assert!(framed
.send(Message::Continuation(Item::FirstBinary("text".into())))
.await
.is_err());
framed
.send(Message::Continuation(Item::Continue("text".into())))
.await
.unwrap();
let item = framed.next().await.unwrap().unwrap();
assert_eq!(
item,
Frame::Continuation(Item::Continue(Bytes::from_static(b"text")))
);
framed
.send(Message::Continuation(Item::Last("text".into())))
.await
.unwrap();
let item = framed.next().await.unwrap().unwrap();
assert_eq!(
item,
Frame::Continuation(Item::Last(Bytes::from_static(b"text")))
);
assert!(framed
.send(Message::Continuation(Item::Continue("text".into())))
.await
.is_err());
assert!(framed
.send(Message::Continuation(Item::Last("text".into())))
.await
.is_err());
framed
.send(Message::Close(Some(CloseCode::Normal.into())))
.await
.unwrap();
let item = framed.next().await.unwrap().unwrap();
assert_eq!(item, Frame::Close(Some(CloseCode::Normal.into())));
}
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