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|
//! An HTTP+TLS server based on `hyper` and `async-native-tls`.
//!
//! Run with:
//!
//! ```
//! cargo run --example hyper-server
//! ```
//!
//! Open in the browser any of these addresses:
//!
//! - http://localhost:8000/
//! - https://localhost:8001/ (accept the security prompt in the browser)
//!
//! Refer to `README.md` to see how to the TLS certificate was generated.
use std::net::{TcpListener, TcpStream};
use std::pin::Pin;
use std::sync::Arc;
use std::task::{Context, Poll};
use anyhow::Result;
use async_native_tls::{Identity, TlsAcceptor, TlsStream};
use http_body_util::Full;
use hyper::body::Incoming;
use hyper::service::service_fn;
use hyper::{Request, Response};
use macro_rules_attribute::apply;
use smol::{future, io, prelude::*, Async, Executor};
use smol_hyper::rt::{FuturesIo, SmolTimer};
use smol_macros::main;
/// Serves a request and returns a response.
async fn serve(req: Request<Incoming>) -> Result<Response<Full<&'static [u8]>>> {
println!("Serving {}", req.uri());
Ok(Response::new(Full::new("Hello from hyper!".as_bytes())))
}
/// Handle a new client.
async fn handle_client(client: Async<TcpStream>, tls: Option<TlsAcceptor>) -> Result<()> {
// Wrap it in TLS if necessary.
let client = match &tls {
None => SmolStream::Plain(client),
Some(tls) => {
// In case of HTTPS, establish a secure TLS connection.
SmolStream::Tls(tls.accept(client).await?)
}
};
// Build the server.
hyper::server::conn::http1::Builder::new()
.timer(SmolTimer::new())
.serve_connection(FuturesIo::new(client), service_fn(serve))
.await?;
Ok(())
}
/// Listens for incoming connections and serves them.
async fn listen(
ex: &Arc<Executor<'static>>,
listener: Async<TcpListener>,
tls: Option<TlsAcceptor>,
) -> Result<()> {
// Format the full host address.
let host = &match tls {
None => format!("http://{}", listener.get_ref().local_addr()?),
Some(_) => format!("https://{}", listener.get_ref().local_addr()?),
};
println!("Listening on {}", host);
loop {
// Wait for a new client.
let (client, _) = listener.accept().await?;
// Spawn a task to handle this connection.
ex.spawn({
let tls = tls.clone();
async move {
if let Err(e) = handle_client(client, tls).await {
println!("Error while handling client: {}", e);
}
}
})
.detach();
}
}
#[apply(main!)]
async fn main(ex: &Arc<Executor<'static>>) -> Result<()> {
// Initialize TLS with the local certificate, private key, and password.
let identity = Identity::from_pkcs12(include_bytes!("identity.pfx"), "password")?;
let tls = TlsAcceptor::from(native_tls::TlsAcceptor::new(identity)?);
// Start HTTP and HTTPS servers.
let http = listen(
ex,
Async::<TcpListener>::bind(([127, 0, 0, 1], 8000))?,
None,
);
let https = listen(
ex,
Async::<TcpListener>::bind(([127, 0, 0, 1], 8001))?,
Some(tls),
);
future::try_zip(http, https).await?;
Ok(())
}
/// A TCP or TCP+TLS connection.
enum SmolStream {
/// A plain TCP connection.
Plain(Async<TcpStream>),
/// A TCP connection secured by TLS.
Tls(TlsStream<Async<TcpStream>>),
}
impl AsyncRead for SmolStream {
fn poll_read(
mut self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &mut [u8],
) -> Poll<io::Result<usize>> {
match &mut *self {
Self::Plain(s) => Pin::new(s).poll_read(cx, buf),
Self::Tls(s) => Pin::new(s).poll_read(cx, buf),
}
}
}
impl AsyncWrite for SmolStream {
fn poll_write(
mut self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &[u8],
) -> Poll<io::Result<usize>> {
match &mut *self {
Self::Plain(s) => Pin::new(s).poll_write(cx, buf),
Self::Tls(s) => Pin::new(s).poll_write(cx, buf),
}
}
fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
match &mut *self {
Self::Plain(s) => Pin::new(s).poll_close(cx),
Self::Tls(s) => Pin::new(s).poll_close(cx),
}
}
fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
match &mut *self {
Self::Plain(s) => Pin::new(s).poll_close(cx),
Self::Tls(s) => Pin::new(s).poll_close(cx),
}
}
}
|
