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docs(examples): update echo example with functionality from the guide

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Update the echo example based on the functionality explained in the
Hyper guide: https://hyper.rs/guides/server/echo

Closes #1528
This commit is contained in:
Josh Leeb-du Toit
2018-06-06 04:38:59 +10:00
committed by Sean McArthur
parent e5118d7eea
commit 924c6da25b
1 changed files with 42 additions and 26 deletions
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64
examples/echo.rs
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@@ -1,41 +1,57 @@
#![deny(warnings)] extern crate futures;
extern crate hyper; extern crate hyper;
extern crate pretty_env_logger;
use futures::future;
use hyper::rt::{Future, Stream};
use hyper::service::service_fn;
use hyper::{Body, Method, Request, Response, Server, StatusCode}; use hyper::{Body, Method, Request, Response, Server, StatusCode};
use hyper::service::service_fn_ok;
use hyper::rt::Future;
static INDEX: &'static [u8] = b"Try POST /echo"; type BoxFut = Box<Future<Item = Response<Body>, Error = hyper::Error> + Send>;
fn echo(req: Request<Body>) -> BoxFut {
let mut response = Response::new(Body::empty());
// Using service_fn_ok, we can convert this function into a `Service`.
fn echo(req: Request<Body>) -> Response<Body> {
match (req.method(), req.uri().path()) { match (req.method(), req.uri().path()) {
(&Method::GET, "/") | (&Method::POST, "/") => { (&Method::GET, "/") => {
Response::new(INDEX.into()) *response.body_mut() = Body::from("Try POSTing data to /echo");
}, }
(&Method::POST, "/echo") => { (&Method::POST, "/echo") => {
Response::new(req.into_body()) *response.body_mut() = req.into_body();
},
_ => {
let mut res = Response::new(Body::empty());
*res.status_mut() = StatusCode::NOT_FOUND;
res
} }
} (&Method::POST, "/echo/uppercase") => {
} let mapping = req.into_body().map(|chunk| {
chunk
.iter()
.map(|byte| byte.to_ascii_uppercase())
.collect::<Vec<u8>>()
});
*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::<Vec<u8>>();
*response.body_mut() = Body::from(body);
response
});
return Box::new(reversed);
}
_ => {
*response.status_mut() = StatusCode::NOT_FOUND;
}
};
Box::new(future::ok(response))
}
fn main() { fn main() {
pretty_env_logger::init(); let addr = ([127, 0, 0, 1], 3000).into();
let addr = ([127, 0, 0, 1], 1337).into();
let server = Server::bind(&addr) let server = Server::bind(&addr)
.serve(|| service_fn_ok(echo)) .serve(|| service_fn(echo))
.map_err(|e| eprintln!("server error: {}", e)); .map_err(|e| eprintln!("server error: {}", e));
println!("Listening on http://{}", addr); println!("The magic happens on port {}", addr.port());
hyper::rt::run(server); hyper::rt::run(server);
} }