Add protobuf support

examples/protobuf/src/main.rs

@@ -0,0 +1,50 @@
+extern crate actix;
+extern crate actix_web;
+extern crate bytes;
+extern crate futures;
+extern crate env_logger;
+extern crate prost;
+#[macro_use] 
+extern crate prost_derive;
+
+use actix_web::*;
+use futures::Future;
+
+
+#[derive(Clone, Debug, PartialEq, Message)]
+pub struct MyObj {
+    #[prost(int32, tag="1")]
+    pub number: i32,
+    #[prost(string, tag="2")]
+    pub name: String,
+}
+
+
+/// This handler uses `HttpRequest::json()` for loading serde json object.
+fn index(req: HttpRequest) -> Box<Future<Item=HttpResponse, Error=Error>> {
+    req.protobuf()
+        .from_err()  // convert all errors into `Error`
+        .and_then(|val: MyObj| {
+            println!("model: {:?}", val);
+            Ok(httpcodes::HTTPOk.build().protobuf(val)?)  // <- send response
+        })
+        .responder()
+}
+
+
+fn main() {
+    ::std::env::set_var("RUST_LOG", "actix_web=info");
+    let _ = env_logger::init();
+    let sys = actix::System::new("protobuf-example");
+
+    let addr = HttpServer::new(|| {
+        Application::new()
+            .middleware(middleware::Logger::default())
+            .resource("/", |r| r.method(Method::POST).f(index))})
+        .bind("127.0.0.1:8080").unwrap()
+        .shutdown_timeout(1)
+        .start();
+
+    println!("Started http server: 127.0.0.1:8080");
+    let _ = sys.run();
+}