1 files changed, 69 insertions, 0 deletions
diff --git a/src/rpc_server.rs b/src/rpc_server.rs
new file mode 100644
index 00000000..55c7482b
--- /dev/null
+++ b/src/rpc_server.rs
@@ -0,0 +1,69 @@
+use std::net::SocketAddr;
+use std::sync::Arc;
+
+use bytes::IntoBuf;
+use hyper::service::{make_service_fn, service_fn};
+use hyper::server::conn::AddrStream;
+use hyper::{Body, Method, Request, Response, Server, StatusCode};
+use futures::future::Future;
+
+use crate::error::Error;
+use crate::proto::Message;
+use crate::membership::System;
+
+fn err_to_msg(x: Result<Message, Error>) -> Message {
+	match x {
+		Err(e) => Message::Error(format!("{}", e)),
+		Ok(msg) => msg,
+	}
+}
+
+async fn handler(sys: Arc<System>, req: Request<Body>, addr: SocketAddr) -> Result<Response<Body>, Error> {
+	if req.method() != &Method::POST {
+		let mut bad_request = Response::default();
+		*bad_request.status_mut() = StatusCode::BAD_REQUEST;
+		return Ok(bad_request);
+	}
+
+	let whole_body = hyper::body::to_bytes(req.into_body()).await?;
+	let msg = rmp_serde::decode::from_read::<_, Message>(whole_body.into_buf())?;
+
+	eprintln!("RPC from {}: {:?}", addr, msg);
+
+	let resp = err_to_msg(match &msg {
+		Message::Ping(ping) => sys.handle_ping(&addr, ping).await,
+		Message::PullStatus => sys.handle_pull_status().await,
+		Message::PullConfig => sys.handle_pull_config().await,
+		Message::AdvertiseNodesUp(adv) => sys.handle_advertise_nodes_up(adv).await,
+		Message::AdvertiseConfig(adv) => sys.handle_advertise_config(adv).await,
+
+		_ => Ok(Message::Error(format!("Unexpected message: {:?}", msg))),
+	});
+
+	Ok(Response::new(Body::from(
+		rmp_serde::encode::to_vec_named(&resp)?
+        )))
+}
+
+
+pub async fn run_rpc_server(sys: Arc<System>, shutdown_signal: impl Future<Output=()>) -> Result<(), hyper::Error> {
+    let bind_addr = ([0, 0, 0, 0], sys.config.rpc_port).into();
+
+    let service = make_service_fn(|conn: &AddrStream| {
+		let client_addr = conn.remote_addr();
+		let sys = sys.clone();
+		async move {
+			Ok::<_, Error>(service_fn(move |req: Request<Body>| {
+				let sys = sys.clone();
+				handler(sys, req, client_addr)
+			}))
+		}
+	});
+
+    let server = Server::bind(&bind_addr).serve(service) ;
+
+	let graceful = server.with_graceful_shutdown(shutdown_signal);
+    println!("RPC server listening on http://{}", bind_addr);
+
+	graceful.await
+}