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#![feature(try_trait_v2)]
#![feature(exclusive_range_pattern)]
pub mod config;
pub mod error;
pub mod files;
pub mod proxy;
use crate::{
config::{Config, HostConfig},
files::serve_files,
proxy::proxy_request,
};
use anyhow::{anyhow, bail, Context, Result};
use error::ServiceError;
use http_body_util::{combinators::BoxBody, BodyExt};
use hyper::{
body::Incoming,
header::{CONTENT_TYPE, HOST, SERVER},
http::HeaderValue,
server::conn::http1,
service::service_fn,
Request, Response, StatusCode,
};
use log::{debug, error, info, warn};
use std::{fs::File, io::BufReader, net::SocketAddr, path::Path, sync::Arc};
use tokio::{
io::{AsyncRead, AsyncWrite},
net::TcpListener,
signal::ctrl_c,
};
use tokio_rustls::TlsAcceptor;
#[tokio::main]
async fn main() -> anyhow::Result<()> {
env_logger::init_from_env("LOG");
let config_path = std::env::args().skip(1).next().ok_or(anyhow!(
"first argument is expected to be the configuration file"
))?;
let config = Arc::new(Config::load(&config_path)?);
let config2 = config.clone();
tokio::spawn(async move {
if let Err(e) = serve_http(config).await {
error!("{e}")
}
});
tokio::spawn(async move {
if let Err(e) = serve_https(config2).await {
error!("{e}")
}
});
ctrl_c().await.unwrap();
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}");
let config = config.clone();
tokio::spawn(async move { serve_stream(config, stream, addr).await });
}
}
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 = Arc::new(TlsAcceptor::from(tls_config));
info!("serving https");
loop {
let (stream, addr) = listener.accept().await.context("accepting connection")?;
let config = config.clone();
let tls_acceptor = tls_acceptor.clone();
tokio::task::spawn(async move {
debug!("connection from {addr}");
match tls_acceptor.accept(stream).await {
Ok(stream) => serve_stream(config, stream, addr).await,
Err(e) => warn!("error accepting tls: {e}"),
};
});
}
}
pub async fn serve_stream<T: AsyncRead + AsyncWrite + Unpin + Send + 'static>(
config: Arc<Config>,
stream: T,
addr: SocketAddr,
) {
let conn = http1::Builder::new()
.serve_connection(
stream,
service_fn(move |req| {
let config = config.clone();
async move {
match service(config, req, addr).await {
Ok(r) => Ok(r),
Err(ServiceError::Hyper(e)) => Err(e),
Err(error) => Ok({
let mut resp =
Response::new(format!("gnix encountered an issue: {error}"));
*resp.status_mut() = StatusCode::BAD_REQUEST;
resp.headers_mut()
.insert(CONTENT_TYPE, HeaderValue::from_static("text/plain"));
resp
}
.map(|b| b.map_err(|e| match e {}).boxed())),
}
}
}),
)
.with_upgrades();
if let Err(err) = conn.await {
warn!("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>,
req: Request<Incoming>,
addr: SocketAddr,
) -> Result<hyper::Response<BoxBody<bytes::Bytes, ServiceError>>, ServiceError> {
debug!("{addr} ~> {:?} {}", req.headers().get(HOST), req.uri());
let route = config
.hosts
.get(remove_port(
&req.headers()
.get(HOST)
.and_then(|e| e.to_str().ok())
.map(String::from)
.unwrap_or(String::from("")),
))
.ok_or(ServiceError::NoHost)?;
let mut resp = match route {
HostConfig::Backend { backend } => proxy_request(req, addr, backend).await,
HostConfig::Files { files } => serve_files(req, files).await,
}?;
let server_header = resp.headers().get(SERVER).cloned();
resp.headers_mut().insert(
SERVER,
HeaderValue::from_str(&if let Some(o) = server_header {
format!("{} via gnix", o.to_str().ok().unwrap_or("invalid"))
} else {
format!("gnix")
})
.unwrap(),
);
return Ok(resp);
}
pub fn remove_port(s: &str) -> &str {
s.split_once(":").map(|(s, _)| s).unwrap_or(s)
}
|
