add http proxy example

.travis.yml

@@ -55,6 +55,7 @@ script:
     if [[ "$TRAVIS_RUST_VERSION" == "stable" ]]; then
       cd examples/basics && cargo check && cd ../..
       cd examples/hello-world && cargo check && cd ../..
+      cd examples/http-proxy && cargo check && cd ../..
       cd examples/multipart && cargo check && cd ../..
       cd examples/json && cargo check && cd ../..
       cd examples/juniper && cargo check && cd ../..

Cargo.toml

@@ -106,6 +106,7 @@ members = [
   "examples/r2d2",
   "examples/json",
   "examples/hello-world",
+  "examples/http-proxy",
   "examples/multipart",
   "examples/state",
   "examples/redis-session",

examples/http-proxy/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "http-proxy"
+version = "0.1.0"
+authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
+workspace = "../.."
+
+[dependencies]
+env_logger = "0.5"
+futures = "0.1"
+actix = "0.5"
+actix-web = { path = "../../", features=["alpn"] }

examples/http-proxy/src/main.rs

@@ -0,0 +1,47 @@
+extern crate actix;
+extern crate actix_web;
+extern crate futures;
+extern crate env_logger;
+
+use actix_web::*;
+use futures::Future;
+use futures::future::{ok, err, Either};
+
+
+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(|e| error::Error::from(error::ErrorInternalServerError(e)))
+        .then(|result| match result {
+            Ok(resp) => {
+                Either::A(resp.body().from_err().and_then(|body| {
+                    match httpcodes::HttpOk.build().body(body) {
+                        Ok(resp) => ok(resp),
+                        Err(e) => err(e.into()),
+                    }
+                }))
+            },
+            Err(e) => {
+                Either::B(err(error::Error::from(e)))
+            }
+        })
+        .responder()
+}
+
+fn main() {
+    ::std::env::set_var("RUST_LOG", "actix_web=info");
+    let _ = env_logger::init();
+    let sys = actix::System::new("ws-example");
+
+    let _addr = HttpServer::new(
+        || Application::new()
+            // enable logger
+            .middleware(middleware::Logger::default())
+            .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();
+}