94 lines
2.4 KiB
Rust
94 lines
2.4 KiB
Rust
#[macro_use]
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extern crate log;
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use anyhow::{Context, Result};
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use future::ready;
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use futures::prelude::*;
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use futures::try_join;
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use net::{server::greet, ClientMessage, ServerMessage};
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use serde_json::{from_str, to_string};
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use std::net::ToSocketAddrs;
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use stream::FuturesUnordered;
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use structopt::StructOpt;
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use warp::{serve, ws, ws::Ws, Filter};
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use ws::{Message, WebSocket};
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pub mod net;
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#[derive(StructOpt)]
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/// Server for base2020 lockstep protocol for multiplayer games.
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struct Args {
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/// The socket address to listen for connections on;
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/// can be a hostname to bind to multiple hosts at once,
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/// such as to listen on both IPv4 & IPv6.
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listen: String,
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}
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#[tokio::main]
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async fn main() -> Result<()> {
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env_logger::init();
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let args = Args::from_args();
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// dispatch websockets
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let socket_handler = ws().map(|upgrade: Ws| {
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upgrade.on_upgrade(|ws| {
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async {
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if let Err(error) = handle_socket(ws).await {
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warn!("Websocket connection lost: {:#}", error);
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}
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}
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})
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});
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let addrs = args
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.listen
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.to_socket_addrs()
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.context("Couldn't parse the listen address")?;
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let servers = FuturesUnordered::new();
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for addr in addrs {
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let (_, server) = serve(socket_handler).try_bind_ephemeral(addr)?;
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servers.push(server);
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}
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servers.for_each(|_| async {}).await;
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Ok(())
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}
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async fn handle_socket(websocket: WebSocket) -> Result<()> {
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let (sink, source) = websocket.split();
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let mut sink = sink.with(|msg: ServerMessage| {
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ready(
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to_string(&msg)
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.context("JSON encoding shouldn't fail")
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.map(|json| Message::text(json)),
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)
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});
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greet(&mut sink).await?;
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let mut source = source.map_err(Into::into).try_filter_map(|msg| {
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ready(match msg.to_str() {
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Ok(json) => from_str::<ClientMessage>(json)
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.context("Parsing JSON")
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.map(Some),
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Err(()) => {
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debug!("Non-text message");
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Ok(None)
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}
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})
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});
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let input_task = async {
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loop {
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match source.next().await {
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Some(Ok(msg)) => debug!("Client message: {:?}", &msg),
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Some(Err(error)) => return Err(error),
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None => break Ok(()),
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}
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}
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};
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try_join!(input_task).map(|((),)| ())
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}
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