# hyper-reverse-proxy [![Build Status](https://travis-ci.org/brendanzab/hyper-reverse-proxy.svg?branch=master)](https://travis-ci.org/brendanzab/hyper-reverse-proxy) [![Documentation](https://docs.rs/hyper-reverse-proxy/badge.svg)](https://docs.rs/hyper-reverse-proxy) [![Version](https://img.shields.io/crates/v/hyper-reverse-proxy.svg)](https://crates.io/crates/hyper-reverse-proxy) [![License](https://img.shields.io/crates/l/hyper-reverse-proxy.svg)](https://github.com/brendanzab/hyper-reverse-proxy/blob/master/LICENSE) A simple reverse proxy, to be used with [Hyper]. The implementation ensures that [Hop-by-hop headers] are stripped correctly in both directions, and adds the client's IP address to a comma-space-separated list of forwarding addresses in the `X-Forwarded-For` header. The implementation is based on Go's [`httputil.ReverseProxy`]. [Hyper]: http://hyper.rs/ [Hop-by-hop headers]: http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html [`httputil.ReverseProxy`]: https://golang.org/pkg/net/http/httputil/#ReverseProxy # Example Add these dependencies to your `Cargo.toml` file. ```toml [dependencies] hyper-reverse-proxy = "0.5" hyper = { version = "0.14", features = ["full"] } tokio = { version = "1", features = ["full"] } ``` The following example will set up a reverse proxy listening on `127.0.0.1:13900`, and will proxy these calls: * `"/target/first"` will be proxied to `http://127.0.0.1:13901` * `"/target/second"` will be proxied to `http://127.0.0.1:13902` * All other URLs will be handled by `debug_request` function, that will display request information. ```rust,no_run use hyper::server::conn::AddrStream; use hyper::{Body, Request, Response, Server, StatusCode}; use hyper::service::{service_fn, make_service_fn}; use std::{convert::Infallible, net::SocketAddr}; use std::net::IpAddr; fn debug_request(req: Request) -> Result, Infallible> { let body_str = format!("{:?}", req); Ok(Response::new(Body::from(body_str))) } async fn handle(client_ip: IpAddr, req: Request) -> Result, Infallible> { if req.uri().path().starts_with("/target/first") { // will forward requests to port 13901 match hyper_reverse_proxy::call(client_ip, "http://127.0.0.1:13901", req).await { Ok(response) => {Ok(response)} Err(_error) => {Ok(Response::builder() .status(StatusCode::INTERNAL_SERVER_ERROR) .body(Body::empty()) .unwrap())} } } else if req.uri().path().starts_with("/target/second") { // will forward requests to port 13902 match hyper_reverse_proxy::call(client_ip, "http://127.0.0.1:13902", req).await { Ok(response) => {Ok(response)} Err(_error) => {Ok(Response::builder() .status(StatusCode::INTERNAL_SERVER_ERROR) .body(Body::empty()) .unwrap())} } } else { debug_request(req) } } #[tokio::main] async fn main() { let bind_addr = "127.0.0.1:8000"; let addr:SocketAddr = bind_addr.parse().expect("Could not parse ip:port."); let make_svc = make_service_fn(|conn: &AddrStream| { let remote_addr = conn.remote_addr().ip(); async move { Ok::<_, Infallible>(service_fn(move |req| handle(remote_addr, req))) } }); let server = Server::bind(&addr).serve(make_svc); println!("Running server on {:?}", addr); if let Err(e) = server.await { eprintln!("server error: {}", e); } } ```