actix examples in actix release version

http-proxy/Cargo.toml

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+[package]
+name = "http-proxy"
+version = "0.1.0"
+authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
+
+[dependencies]
+env_logger = "0.5"
+futures = "0.1"
+actix = "0.5"
+actix-web = { version = "^0.5", features=["alpn"] }

http-proxy/src/main.rs

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+extern crate actix;
+extern crate actix_web;
+extern crate futures;
+extern crate env_logger;
+
+use futures::{Future, Stream};
+use actix_web::{
+    client, server, middleware,
+    App, AsyncResponder, Body, HttpRequest, HttpResponse, HttpMessage, Error};
+
+
+/// Stream client request response and then send body to a server response
+fn index(_req: HttpRequest) -> Box<Future<Item=HttpResponse, Error=Error>> {
+    client::ClientRequest::get("https://www.rust-lang.org/en-US/")
+        .finish().unwrap()
+        .send()
+        .map_err(Error::from)   // <- convert SendRequestError to an Error
+        .and_then(
+            |resp| resp.body()         // <- this is MessageBody type, resolves to complete body
+                .from_err()            // <- convert PayloadError to a Error
+                .and_then(|body| {     // <- we got complete body, now send as server response
+                    Ok(HttpResponse::Ok().body(body))
+                }))
+        .responder()
+}
+
+/// streaming client request to a streaming server response
+fn streaming(_req: HttpRequest) -> Box<Future<Item=HttpResponse, Error=Error>> {
+    // send client request
+    client::ClientRequest::get("https://www.rust-lang.org/en-US/")
+        .finish().unwrap()
+        .send()                         // <- connect to host and send request
+        .map_err(Error::from)    // <- convert SendRequestError to an Error
+        .and_then(|resp| {              // <- we received client response
+            Ok(HttpResponse::Ok()
+               // read one chunk from client response and send this chunk to a server response
+               // .from_err() converts PayloadError to a Error
+               .body(Body::Streaming(Box::new(resp.from_err()))))
+        })
+        .responder()
+}
+
+fn main() {
+    ::std::env::set_var("RUST_LOG", "actix_web=info");
+    env_logger::init();
+    let sys = actix::System::new("http-proxy");
+
+    server::new(
+        || App::new()
+            .middleware(middleware::Logger::default())
+            .resource("/streaming", |r| r.f(streaming))
+            .resource("/", |r| r.f(index)))
+        .bind("127.0.0.1:8080").unwrap()
+        .start();
+
+    println!("Started http server: 127.0.0.1:8080");
+    let _ = sys.run();
+}