2020-04-06 17:55:39 +00:00
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use std::net::SocketAddr;
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use std::sync::Arc;
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2020-04-05 21:33:42 +00:00
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use bytes::IntoBuf;
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use hyper::service::{make_service_fn, service_fn};
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2020-04-06 17:55:39 +00:00
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use hyper::server::conn::AddrStream;
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2020-04-05 21:33:42 +00:00
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use hyper::{Body, Method, Request, Response, Server, StatusCode};
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use futures::future::Future;
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use crate::error::Error;
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use crate::proto::Message;
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2020-04-06 17:55:39 +00:00
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use crate::membership::System;
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fn err_to_msg(x: Result<Message, Error>) -> Message {
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match x {
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Err(e) => Message::Error(format!("{}", e)),
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Ok(msg) => msg,
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}
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}
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async fn handler(sys: Arc<System>, req: Request<Body>, addr: SocketAddr) -> Result<Response<Body>, Error> {
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2020-04-05 21:33:42 +00:00
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if req.method() != &Method::POST {
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let mut bad_request = Response::default();
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*bad_request.status_mut() = StatusCode::BAD_REQUEST;
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return Ok(bad_request);
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}
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let whole_body = hyper::body::to_bytes(req.into_body()).await?;
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2020-04-06 17:55:39 +00:00
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let msg = rmp_serde::decode::from_read::<_, Message>(whole_body.into_buf())?;
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eprintln!("RPC from {}: {:?}", addr, msg);
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let resp = err_to_msg(match &msg {
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2020-04-06 19:02:15 +00:00
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Message::Ping(ping) => sys.handle_ping(&addr, ping).await,
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2020-04-06 20:27:51 +00:00
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Message::PullStatus => sys.handle_pull_status().await,
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Message::PullConfig => sys.handle_pull_config().await,
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Message::AdvertiseNodesUp(adv) => sys.handle_advertise_nodes_up(adv).await,
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Message::AdvertiseConfig(adv) => sys.handle_advertise_config(adv).await,
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2020-04-06 17:55:39 +00:00
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_ => Ok(Message::Error(format!("Unexpected message: {:?}", msg))),
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});
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2020-04-05 21:33:42 +00:00
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Ok(Response::new(Body::from(
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rmp_serde::encode::to_vec_named(&resp)?
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)))
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}
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2020-04-06 17:55:39 +00:00
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pub async fn run_rpc_server(sys: Arc<System>, shutdown_signal: impl Future<Output=()>) -> Result<(), hyper::Error> {
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let bind_addr = ([0, 0, 0, 0], sys.config.rpc_port).into();
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2020-04-05 21:33:42 +00:00
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2020-04-06 17:55:39 +00:00
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let service = make_service_fn(|conn: &AddrStream| {
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let client_addr = conn.remote_addr();
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let sys = sys.clone();
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async move {
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Ok::<_, Error>(service_fn(move |req: Request<Body>| {
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let sys = sys.clone();
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handler(sys, req, client_addr)
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}))
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}
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});
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2020-04-05 21:33:42 +00:00
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2020-04-06 17:55:39 +00:00
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let server = Server::bind(&bind_addr).serve(service) ;
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2020-04-05 21:33:42 +00:00
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let graceful = server.with_graceful_shutdown(shutdown_signal);
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2020-04-06 17:55:39 +00:00
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println!("RPC server listening on http://{}", bind_addr);
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2020-04-05 21:33:42 +00:00
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graceful.await
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}
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