mirror of https://github.com/stjepang/smol
93 lines
2.8 KiB
Rust
93 lines
2.8 KiB
Rust
//! A simple HTTP+TLS server based on `async-native-tls`.
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//!
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//! Run with:
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//!
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//! ```
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//! cargo run --example simple-server
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//! ```
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//!
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//! Open in the browser any of these addresses:
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//!
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//! - http://localhost:8000/
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//! - https://localhost:8001/ (accept the security prompt in the browser)
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//!
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//! Refer to `README.md` to see how to the TLS certificate was generated.
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use std::net::{TcpListener, TcpStream};
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use anyhow::Result;
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use async_native_tls::{Identity, TlsAcceptor};
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use smol::{future, prelude::*, Async};
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const RESPONSE: &[u8] = br#"
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HTTP/1.1 200 OK
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Content-Type: text/html
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Content-Length: 47
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<!DOCTYPE html><html><body>Hello!</body></html>
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"#;
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/// Reads a request from the client and sends it a response.
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async fn serve(mut stream: Async<TcpStream>, tls: Option<TlsAcceptor>) -> Result<()> {
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match tls {
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None => {
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println!("Serving http://{}", stream.get_ref().local_addr()?);
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stream.write_all(RESPONSE).await?;
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}
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Some(tls) => {
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println!("Serving https://{}", stream.get_ref().local_addr()?);
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// In case of HTTPS, establish a secure TLS connection first.
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match tls.accept(stream).await {
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Ok(mut stream) => {
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stream.write_all(RESPONSE).await?;
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stream.flush().await?;
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stream.close().await?;
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}
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Err(err) => println!("Failed to establish secure TLS connection: {:#?}", err),
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}
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}
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}
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Ok(())
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}
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/// Listens for incoming connections and serves them.
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async fn listen(listener: Async<TcpListener>, tls: Option<TlsAcceptor>) -> Result<()> {
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// Display the full host address.
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match &tls {
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None => println!("Listening on http://{}", listener.get_ref().local_addr()?),
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Some(_) => println!("Listening on https://{}", listener.get_ref().local_addr()?),
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}
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loop {
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// Accept the next connection.
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let (stream, _) = listener.accept().await?;
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let tls = tls.clone();
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// Spawn a background task serving this connection.
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smol::spawn(async move {
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if let Err(err) = serve(stream, tls).await {
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println!("Connection error: {:#?}", err);
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}
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})
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.detach();
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}
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}
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fn main() -> Result<()> {
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// Initialize TLS with the local certificate, private key, and password.
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let identity = Identity::from_pkcs12(include_bytes!("identity.pfx"), "password")?;
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let tls = TlsAcceptor::from(native_tls::TlsAcceptor::new(identity)?);
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// Start HTTP and HTTPS servers.
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smol::block_on(async {
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let http = listen(Async::<TcpListener>::bind(([127, 0, 0, 1], 8000))?, None);
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let https = listen(
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Async::<TcpListener>::bind(([127, 0, 0, 1], 8001))?,
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Some(tls),
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);
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future::try_zip(http, https).await?;
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Ok(())
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})
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}
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