0c8ee93d7f
This removes the `tcp` feature from hyper's `Cargo.toml`, and the code it enabled: - `HttpConnector` - `GaiResolver` - `AddrStream` And parts of `Client` and `Server` that used those types. Alternatives will be available in the `hyper-util` crate. Closes #2856 Co-authored-by: MrGunflame <mrgunflame@protonmail.com>
124 lines
3.9 KiB
Rust
124 lines
3.9 KiB
Rust
#![deny(warnings)]
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use std::net::SocketAddr;
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use hyper::client::conn::Builder;
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use hyper::server::conn::Http;
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use hyper::service::service_fn;
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use hyper::upgrade::Upgraded;
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use hyper::{Body, Method, Request, Response};
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use tokio::net::{TcpListener, TcpStream};
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// To try this example:
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// 1. cargo run --example http_proxy
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// 2. config http_proxy in command line
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// $ export http_proxy=http://127.0.0.1:8100
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// $ export https_proxy=http://127.0.0.1:8100
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// 3. send requests
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// $ curl -i https://www.some_domain.com/
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#[tokio::main]
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async fn main() -> Result<(), Box<dyn std::error::Error>> {
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let addr = SocketAddr::from(([127, 0, 0, 1], 8100));
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let listener = TcpListener::bind(addr).await?;
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println!("Listening on http://{}", addr);
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loop {
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let (stream, _) = listener.accept().await?;
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tokio::task::spawn(async move {
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if let Err(err) = Http::new()
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.http1_preserve_header_case(true)
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.http1_title_case_headers(true)
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.serve_connection(stream, service_fn(proxy))
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.await
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{
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println!("Failed to serve connection: {:?}", err);
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}
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});
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}
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}
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async fn proxy(req: Request<Body>) -> Result<Response<Body>, hyper::Error> {
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println!("req: {:?}", req);
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if Method::CONNECT == req.method() {
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// Received an HTTP request like:
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// ```
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// CONNECT www.domain.com:443 HTTP/1.1
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// Host: www.domain.com:443
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// Proxy-Connection: Keep-Alive
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// ```
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//
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// When HTTP method is CONNECT we should return an empty body
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// then we can eventually upgrade the connection and talk a new protocol.
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//
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// Note: only after client received an empty body with STATUS_OK can the
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// connection be upgraded, so we can't return a response inside
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// `on_upgrade` future.
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if let Some(addr) = host_addr(req.uri()) {
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tokio::task::spawn(async move {
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match hyper::upgrade::on(req).await {
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Ok(upgraded) => {
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if let Err(e) = tunnel(upgraded, addr).await {
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eprintln!("server io error: {}", e);
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};
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}
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Err(e) => eprintln!("upgrade error: {}", e),
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}
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});
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Ok(Response::new(Body::empty()))
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} else {
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eprintln!("CONNECT host is not socket addr: {:?}", req.uri());
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let mut resp = Response::new(Body::from("CONNECT must be to a socket address"));
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*resp.status_mut() = http::StatusCode::BAD_REQUEST;
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Ok(resp)
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}
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} else {
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let host = req.uri().host().expect("uri has no host");
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let port = req.uri().port_u16().unwrap_or(80);
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let addr = format!("{}:{}", host, port);
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let stream = TcpStream::connect(addr).await.unwrap();
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let (mut sender, conn) = Builder::new()
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.http1_preserve_header_case(true)
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.http1_title_case_headers(true)
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.handshake(stream)
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.await?;
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tokio::task::spawn(async move {
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if let Err(err) = conn.await {
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println!("Connection failed: {:?}", err);
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}
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});
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sender.send_request(req).await
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}
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}
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fn host_addr(uri: &http::Uri) -> Option<String> {
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uri.authority().and_then(|auth| Some(auth.to_string()))
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}
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// Create a TCP connection to host:port, build a tunnel between the connection and
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// the upgraded connection
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async fn tunnel(mut upgraded: Upgraded, addr: String) -> std::io::Result<()> {
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// Connect to remote server
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let mut server = TcpStream::connect(addr).await?;
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// Proxying data
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let (from_client, from_server) =
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tokio::io::copy_bidirectional(&mut upgraded, &mut server).await?;
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// Print message when done
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println!(
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"client wrote {} bytes and received {} bytes",
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from_client, from_server
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);
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Ok(())
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}
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