use std::{
convert::Infallible, future::Future, io, net, sync::mpsc as std_mpsc, thread, time::Duration,
};
use hpx::Body;
use tokio::{io::AsyncReadExt, net::TcpStream, runtime, sync::oneshot};
pub struct Server {
addr: net::SocketAddr,
panic_rx: std_mpsc::Receiver<()>,
events_rx: std_mpsc::Receiver<Event>,
shutdown_tx: Option<oneshot::Sender<()>>,
}
#[non_exhaustive]
pub enum Event {
ConnectionClosed,
}
impl Server {
pub fn addr(&self) -> net::SocketAddr {
self.addr
}
#[allow(unused)]
pub fn events(&mut self) -> Vec<Event> {
let mut events = Vec::new();
while let Ok(event) = self.events_rx.try_recv() {
events.push(event);
}
events
}
}
impl Drop for Server {
fn drop(&mut self) {
if let Some(tx) = self.shutdown_tx.take() {
let _ = tx.send(());
}
if !::std::thread::panicking() {
self.panic_rx
.recv_timeout(Duration::from_secs(3))
.expect("test server should not panic");
}
}
}
#[allow(unused)]
pub fn http<F, Fut>(func: F) -> Server
where
F: Fn(http::Request<hyper::body::Incoming>) -> Fut + Clone + Send + 'static,
Fut: Future<Output = http::Response<Body>> + Send + 'static,
{
let infall = move |req| {
let fut = func(req);
async move { Ok::<_, Infallible>(fut.await) }
};
http_with_config(infall, |_builder| {})
}
type Builder = hyper_util::server::conn::auto::Builder<hyper_util::rt::TokioExecutor>;
pub fn http_with_config<F1, Fut, E, F2, Bu>(func: F1, apply_config: F2) -> Server
where
F1: Fn(http::Request<hyper::body::Incoming>) -> Fut + Clone + Send + 'static,
Fut: Future<Output = Result<http::Response<Body>, E>> + Send + 'static,
E: Into<Box<dyn std::error::Error + Send + Sync>>,
F2: FnOnce(&mut Builder) -> Bu + Send + 'static,
{
let test_name = thread::current().name().unwrap_or("<unknown>").to_string();
thread::spawn(move || {
let rt = runtime::Builder::new_current_thread()
.enable_all()
.build()
.expect("new rt");
let listener = rt.block_on(async move {
tokio::net::TcpListener::bind(&std::net::SocketAddr::from(([127, 0, 0, 1], 0)))
.await
.unwrap()
});
let addr = listener.local_addr().unwrap();
let (shutdown_tx, mut shutdown_rx) = oneshot::channel();
let (panic_tx, panic_rx) = std_mpsc::channel();
let (events_tx, events_rx) = std_mpsc::channel();
let tname = format!(
"test({test_name})-support-server",
);
thread::Builder::new()
.name(tname)
.spawn(move || {
rt.block_on(async move {
let mut builder =
hyper_util::server::conn::auto::Builder::new(hyper_util::rt::TokioExecutor::new());
apply_config(&mut builder);
loop {
tokio::select! {
_ = &mut shutdown_rx => {
break;
}
accepted = listener.accept() => {
let (io, _) = accepted.expect("accepted");
let func = func.clone();
let svc = hyper::service::service_fn(func);
let builder = builder.clone();
let events_tx = events_tx.clone();
tokio::spawn(async move {
let _ = builder.serve_connection_with_upgrades(hyper_util::rt::TokioIo::new(io), svc).await;
let _ = events_tx.send(Event::ConnectionClosed);
});
}
}
}
let _ = panic_tx.send(());
});
})
.expect("thread spawn");
Server {
addr,
panic_rx,
events_rx,
shutdown_tx: Some(shutdown_tx),
}
})
.join()
.unwrap()
}
#[allow(unused)]
pub fn low_level_with_response<F>(do_response: F) -> Server
where
for<'c> F: Fn(&'c [u8], &'c mut TcpStream) -> Box<dyn Future<Output = ()> + Send + 'c>
+ Clone
+ Send
+ 'static,
{
let test_name = thread::current().name().unwrap_or("<unknown>").to_string();
thread::spawn(move || {
let rt = runtime::Builder::new_current_thread()
.enable_all()
.build()
.expect("new rt");
let listener = rt.block_on(async move {
tokio::net::TcpListener::bind(&std::net::SocketAddr::from(([127, 0, 0, 1], 0)))
.await
.unwrap()
});
let addr = listener.local_addr().unwrap();
let (shutdown_tx, mut shutdown_rx) = oneshot::channel();
let (panic_tx, panic_rx) = std_mpsc::channel();
let (events_tx, events_rx) = std_mpsc::channel();
let tname = format!("test({test_name})-support-server",);
thread::Builder::new()
.name(tname)
.spawn(move || {
rt.block_on(async move {
loop {
tokio::select! {
_ = &mut shutdown_rx => {
break;
}
accepted = listener.accept() => {
let (io, _) = accepted.expect("accepted");
let do_response = do_response.clone();
let events_tx = events_tx.clone();
tokio::spawn(async move {
low_level_server_client(io, do_response).await;
let _ = events_tx.send(Event::ConnectionClosed);
});
}
}
}
let _ = panic_tx.send(());
});
})
.expect("thread spawn");
Server {
addr,
panic_rx,
events_rx,
shutdown_tx: Some(shutdown_tx),
}
})
.join()
.unwrap()
}
#[allow(unused)]
async fn low_level_server_client<F>(mut client_socket: TcpStream, do_response: F)
where
for<'c> F: Fn(&'c [u8], &'c mut TcpStream) -> Box<dyn Future<Output = ()> + Send + 'c>,
{
loop {
let request = low_level_read_http_request(&mut client_socket)
.await
.expect("read_http_request failed");
if request.is_empty() {
break;
}
Box::into_pin(do_response(&request, &mut client_socket)).await;
}
}
#[allow(unused)]
async fn low_level_read_http_request(client_socket: &mut TcpStream) -> io::Result<Vec<u8>> {
let mut buf = Vec::new();
loop {
let mut temp_buffer = [0; 1024];
let n = client_socket.read(&mut temp_buffer).await?;
if n == 0 {
break;
}
buf.extend_from_slice(&temp_buffer[..n]);
if let Some(pos) = buf.windows(4).position(|window| window == b"\r\n\r\n") {
return Ok(buf.drain(..pos + 4).collect());
}
}
Ok(buf)
}