docs(examples): update proxy example to async/await

examples_disabled/proxy.rs

@@ -1,44 +0,0 @@
-#![deny(warnings)]
-extern crate hyper;
-extern crate pretty_env_logger;
-
-use hyper::{Client, Server};
-use hyper::service::service_fn;
-use hyper::rt::{self, Future};
-use std::net::SocketAddr;
-
-fn main() {
-    pretty_env_logger::init();
-
-    let in_addr = ([127, 0, 0, 1], 3001).into();
-    let out_addr: SocketAddr = ([127, 0, 0, 1], 3000).into();
-
-    let client_main = Client::new();
-
-    let out_addr_clone = out_addr.clone();
-    // new_service is run for each connection, creating a 'service'
-    // to handle requests for that specific connection.
-    let new_service = move || {
-        let client = client_main.clone();
-        // This is the `Service` that will handle the connection.
-        // `service_fn_ok` is a helper to convert a function that
-        // returns a Response into a `Service`.
-        service_fn(move |mut req| {
-            let uri_string = format!("http://{}/{}",
-                out_addr_clone,
-                req.uri().path_and_query().map(|x| x.as_str()).unwrap_or(""));
-            let uri = uri_string.parse().unwrap();
-            *req.uri_mut() = uri;
-            client.request(req)
-        })
-    };
-
-    let server = Server::bind(&in_addr)
-        .serve(new_service)
-        .map_err(|e| eprintln!("server error: {}", e));
-
-    println!("Listening on http://{}", in_addr);
-    println!("Proxying on http://{}", out_addr);
-
-    rt::run(server);
-}