2021-12-07 14:20:45 +00:00
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use std::net::SocketAddr;
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2021-12-07 15:37:22 +00:00
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use std::sync::{atomic::Ordering, Arc};
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2021-12-07 14:20:45 +00:00
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use anyhow::Result;
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use log::*;
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use futures::FutureExt;
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use hyper::server::conn::Http;
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use hyper::service::service_fn;
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use hyper::{Body, Request, Response, StatusCode};
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use tokio::net::TcpListener;
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use tokio::sync::watch;
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use tokio_rustls::TlsAcceptor;
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use crate::cert_store::{CertStore, StoreResolver};
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use crate::proxy_config::ProxyConfig;
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use crate::reverse_proxy;
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pub async fn serve_https(
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cert_store: Arc<CertStore>,
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proxy_config: watch::Receiver<Arc<ProxyConfig>>,
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) -> Result<()> {
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let addr = format!("0.0.0.0:1443");
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let mut cfg = rustls::ServerConfig::builder()
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.with_safe_defaults()
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.with_no_client_auth()
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.with_cert_resolver(Arc::new(StoreResolver(cert_store)));
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cfg.alpn_protocols = vec![b"h2".to_vec(), b"http/1.1".to_vec()];
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let tls_cfg = Arc::new(cfg);
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let tls_acceptor = Arc::new(TlsAcceptor::from(tls_cfg));
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println!("Starting to serve on https://{}.", addr);
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let tcp = TcpListener::bind(&addr).await?;
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loop {
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let (socket, remote_addr) = tcp.accept().await?;
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let proxy_config = proxy_config.clone();
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let tls_acceptor = tls_acceptor.clone();
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tokio::spawn(async move {
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match tls_acceptor.accept(socket).await {
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Ok(stream) => {
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debug!("TLS handshake was successfull");
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let http_result = Http::new()
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.serve_connection(
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stream,
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service_fn(move |req: Request<Body>| {
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let proxy_config: Arc<ProxyConfig> = proxy_config.borrow().clone();
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handle(remote_addr, req, proxy_config).map(|res| match res {
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Err(e) => {
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warn!("Handler error: {}", e);
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Response::builder()
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.status(StatusCode::INTERNAL_SERVER_ERROR)
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.body(Body::from(format!("{}", e)))
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.map_err(Into::into)
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}
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x => x,
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})
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}),
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)
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.await;
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if let Err(http_err) = http_result {
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debug!("HTTP error: {}", http_err);
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}
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}
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Err(e) => debug!("Error in TLS connection: {}", e),
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}
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});
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}
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}
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// Custom echo service, handling two different routes and a
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// catch-all 404 responder.
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async fn handle(
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remote_addr: SocketAddr,
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req: Request<Body>,
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proxy_config: Arc<ProxyConfig>,
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) -> Result<Response<Body>, anyhow::Error> {
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let host = if let Some(auth) = req.uri().authority() {
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auth.as_str()
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} else {
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req.headers()
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.get("host")
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.ok_or_else(|| anyhow!("Missing host header"))?
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.to_str()?
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};
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let path = req.uri().path();
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let ent = proxy_config
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.entries
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.iter()
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.filter(|ent| {
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ent.host == host
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&& ent
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.path_prefix
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.as_ref()
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.map(|prefix| path.starts_with(prefix))
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.unwrap_or(true)
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})
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.min_by_key(|ent| {
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(
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ent.priority,
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-(ent
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.path_prefix
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.as_ref()
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.map(|x| x.len() as i32)
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.unwrap_or(0)),
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2021-12-07 15:37:22 +00:00
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ent.calls.load(Ordering::SeqCst),
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2021-12-07 14:20:45 +00:00
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)
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});
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if let Some(proxy_to) = ent {
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2021-12-07 15:37:22 +00:00
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proxy_to.calls.fetch_add(1, Ordering::SeqCst);
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2021-12-07 14:20:45 +00:00
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let to_addr = format!("http://{}", proxy_to.target_addr);
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info!("Proxying {} {} -> {}", host, path, to_addr);
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reverse_proxy::call(remote_addr.ip(), &to_addr, req).await
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} else {
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info!("Proxying {} {} -> NOT FOUND", host, path);
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Ok(Response::builder()
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.status(StatusCode::NOT_FOUND)
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.body(Body::from("No matching proxy entry"))?)
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}
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}
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