mirror of https://github.com/mastodon/flodgatt
113 lines
4.4 KiB
Rust
113 lines
4.4 KiB
Rust
use flodgatt::config;
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use flodgatt::request::{Handler, Subscription};
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use flodgatt::response::{RedisManager, SseStream, WsStream};
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use flodgatt::Error;
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use futures::future::lazy;
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use futures::stream::Stream as _;
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use std::fs;
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use std::net::SocketAddr;
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use std::os::unix::fs::PermissionsExt;
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use std::time::Instant;
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use tokio::net::UnixListener;
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use tokio::sync::mpsc;
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use tokio::timer::Interval;
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use warp::ws::Ws2;
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use warp::Filter;
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fn main() -> Result<(), Error> {
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config::merge_dotenv()?;
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pretty_env_logger::try_init_timed()?;
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let (postgres_cfg, redis_cfg, cfg) = config::from_env(dotenv::vars().collect())?;
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let poll_freq = *redis_cfg.polling_interval;
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let request = Handler::new(&postgres_cfg, *cfg.whitelist_mode)?;
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let shared_manager = RedisManager::try_from(&redis_cfg)?.into_arc();
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// Server Sent Events
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let sse_manager = shared_manager.clone();
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let sse = request
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.sse_subscription()
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.and(warp::sse())
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.map(move |subscription: Subscription, sse: warp::sse::Sse| {
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log::info!("Incoming SSE request for {:?}", subscription.timeline);
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let mut manager = sse_manager.lock().unwrap_or_else(RedisManager::recover);
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let (event_tx, event_rx) = mpsc::channel(10);
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manager.subscribe(&subscription, event_tx);
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let sse_stream = SseStream::new(subscription);
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sse_stream.send_events(sse, event_rx)
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})
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.with(warp::reply::with::header("Connection", "keep-alive"));
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// WebSocket
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let ws_manager = shared_manager.clone();
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let ws = request
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.ws_subscription()
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.and(warp::ws::ws2())
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.map(move |subscription: Subscription, ws: Ws2| {
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log::info!("Incoming websocket request for {:?}", subscription.timeline);
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let mut manager = ws_manager.lock().unwrap_or_else(RedisManager::recover);
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let (event_tx, event_rx) = mpsc::channel(10);
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manager.subscribe(&subscription, event_tx);
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let token = subscription.access_token.clone().unwrap_or_default(); // token sent for security
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let ws_stream = WsStream::new(subscription);
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(
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ws.on_upgrade(move |ws| ws_stream.send_to(ws, event_rx)),
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token,
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)
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})
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.map(|(reply, token)| warp::reply::with_header(reply, "sec-websocket-protocol", token));
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#[cfg(feature = "stub_status")]
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#[rustfmt::skip]
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let status = {
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let (r1, r2, r3) = (shared_manager.clone(), shared_manager.clone(), shared_manager.clone());
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request.health().map(|| "OK")
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.or(request.status()
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.map(move || r1.lock().unwrap_or_else(RedisManager::recover).count()))
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.or(request.status_backpresure()
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.map(move || r2.lock().unwrap_or_else(RedisManager::recover).backpresure()))
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.or(request.status_per_timeline()
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.map(move || r3.lock().unwrap_or_else(RedisManager::recover).list()))
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};
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#[cfg(not(feature = "stub_status"))]
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let status = request.health().map(|| "OK");
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let cors = warp::cors()
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.allow_any_origin()
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.allow_methods(cfg.cors.allowed_methods)
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.allow_headers(cfg.cors.allowed_headers);
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let streaming_server = move || {
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let manager = shared_manager.clone();
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let stream = Interval::new(Instant::now(), poll_freq)
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.map_err(|e| log::error!("{}", e))
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.for_each(move |_| {
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match manager
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.lock()
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.unwrap_or_else(RedisManager::recover)
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.send_msgs()
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{
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Err(e) => Ok(log::error!("{}", e)),
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Ok(_) => Ok(()),
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}
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});
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warp::spawn(lazy(move || stream));
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warp::serve(ws.or(sse).with(cors).or(status).recover(Handler::err))
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};
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if let Some(socket) = &*cfg.unix_socket {
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log::info!("Using Unix socket {}", socket);
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fs::remove_file(socket).unwrap_or_default();
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let incoming = UnixListener::bind(socket)?.incoming();
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fs::set_permissions(socket, PermissionsExt::from_mode(0o666))?;
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tokio::run(lazy(|| streaming_server().serve_incoming(incoming)));
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} else {
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let server_addr = SocketAddr::new(*cfg.address, *cfg.port);
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tokio::run(lazy(move || streaming_server().bind(server_addr)));
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}
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Err(Error::Unrecoverable) // only reached if poll_broadcast encounters an unrecoverable error
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}
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