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|
pub mod config;
use crate::config::Config;
use anyhow::{bail, Context, Result};
use bytes::Bytes;
use http_body_util::{combinators::BoxBody, BodyExt, Empty};
use hyper::{body::Incoming, server::conn::http1, service::service_fn, Method, Request, Response};
use log::{debug, error, info};
use std::{fs::File, io::BufReader, path::Path, sync::Arc};
use tokio::{
io::{AsyncRead, AsyncWrite},
net::{TcpListener, TcpStream},
};
use tokio_rustls::TlsAcceptor;
#[tokio::main]
async fn main() -> anyhow::Result<()> {
env_logger::init_from_env("LOG");
let config = Arc::new(Config::load()?);
tokio::select! {
x = serve_http(config.clone()) => x.context("serving http")?,
x = serve_https(config.clone()) => x.context("serving https")?,
};
Ok(())
}
async fn serve_http(config: Arc<Config>) -> Result<()> {
let http_config = match &config.http {
Some(n) => n,
None => return Ok(()),
};
let listener = TcpListener::bind(http_config.bind).await?;
info!("serving http");
loop {
let (stream, addr) = listener.accept().await.context("accepting connection")?;
debug!("connection from {addr}");
serve_stream(config.clone(), stream)
}
}
async fn serve_https(config: Arc<Config>) -> Result<()> {
let https_config = match &config.https {
Some(n) => n,
None => return Ok(()),
};
let tls_config = {
let certs = load_certs(&https_config.tls_cert)?;
let key = load_private_key(&https_config.tls_key)?;
let mut cfg = rustls::ServerConfig::builder()
.with_safe_defaults()
.with_no_client_auth()
.with_single_cert(certs, key)?;
cfg.alpn_protocols = vec![
// b"h2".to_vec(),
b"http/1.1".to_vec(),
];
Arc::new(cfg)
};
let listener = TcpListener::bind(https_config.bind).await?;
let tls_acceptor = TlsAcceptor::from(tls_config);
info!("serving https");
loop {
let (stream, addr) = listener.accept().await.context("accepting connection")?;
debug!("connection from {addr}");
let stream = tls_acceptor.accept(stream).await.context("accepting tls")?;
serve_stream(config.clone(), stream)
}
}
pub fn serve_stream<T: AsyncRead + AsyncWrite + Unpin + Send + 'static>(
config: Arc<Config>,
stream: T,
) {
tokio::task::spawn(async move {
if let Err(err) = http1::Builder::new()
.serve_connection(stream, service_fn(move |req| service(config.clone(), req)))
.await
{
error!("{:?}", err);
}
});
}
fn load_certs(path: &Path) -> anyhow::Result<Vec<rustls::Certificate>> {
let mut reader = BufReader::new(File::open(path).context("reading tls certs")?);
let certs = rustls_pemfile::certs(&mut reader).context("parsing tls certs")?;
Ok(certs.into_iter().map(rustls::Certificate).collect())
}
fn load_private_key(path: &Path) -> anyhow::Result<rustls::PrivateKey> {
let mut reader = BufReader::new(File::open(path).context("reading tls private key")?);
let keys =
rustls_pemfile::pkcs8_private_keys(&mut reader).context("parsing tls private key")?;
if keys.len() != 1 {
bail!("expected a single private key, found {}", keys.len())
}
Ok(rustls::PrivateKey(keys[0].clone()))
}
async fn service(
config: Arc<Config>,
mut req: Request<Incoming>,
) -> Result<hyper::Response<BoxBody<bytes::Bytes, hyper::Error>>, hyper::Error> {
let uri_string = format!(
"http://127.0.0.1:8080{}",
req.uri()
.path_and_query()
.map(|x| x.as_str())
.unwrap_or("/")
);
let uri = uri_string.parse().unwrap();
*req.uri_mut() = uri;
let host = req.uri().host().expect("uri has no host");
let port = req.uri().port_u16().unwrap_or(80);
let addr = format!("{}:{}", host, port);
let client_stream = TcpStream::connect(addr).await.unwrap();
if req.method() == Method::CONNECT {
Ok(Response::new(empty()))
} else {
let (mut sender, conn) = hyper::client::conn::http1::handshake(client_stream).await?;
tokio::task::spawn(async move {
if let Err(err) = conn.await {
println!("Connection failed: {:?}", err);
}
});
let resp = sender.send_request(req).await?;
Ok(resp.map(|b| b.boxed()))
}
}
fn empty() -> BoxBody<Bytes, hyper::Error> {
Empty::<Bytes>::new()
.map_err(|never| match never {})
.boxed()
}
|
