extern crate futures; extern crate hyper; use futures::future; use hyper::rt::{Future, Stream}; use hyper::service::service_fn; use hyper::{Body, Method, Request, Response, Server, StatusCode}; type BoxFut = Box, Error = hyper::Error> + Send>; fn echo(req: Request) -> BoxFut { let mut response = Response::new(Body::empty()); match (req.method(), req.uri().path()) { (&Method::GET, "/") => { *response.body_mut() = Body::from("Try POSTing data to /echo"); } (&Method::POST, "/echo") => { *response.body_mut() = req.into_body(); } (&Method::POST, "/echo/uppercase") => { let mapping = req.into_body().map(|chunk| { chunk .iter() .map(|byte| byte.to_ascii_uppercase()) .collect::>() }); *response.body_mut() = Body::wrap_stream(mapping); } (&Method::POST, "/echo/reversed") => { let reversed = req.into_body().concat2().map(move |chunk| { let body = chunk.iter().rev().cloned().collect::>(); *response.body_mut() = Body::from(body); response }); return Box::new(reversed); } _ => { *response.status_mut() = StatusCode::NOT_FOUND; } }; Box::new(future::ok(response)) } fn main() { let addr = ([127, 0, 0, 1], 3000).into(); let server = Server::bind(&addr) .serve(|| service_fn(echo)) .map_err(|e| eprintln!("server error: {}", e)); println!("The magic happens on port {}", addr.port()); hyper::rt::run(server); }