284 lines
8.3 KiB
Rust
284 lines
8.3 KiB
Rust
extern crate lemmy_server;
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#[macro_use] extern crate diesel_migrations;
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use std::time::{Instant, Duration};
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use std::env;
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use lemmy_server::actix::*;
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use lemmy_server::actix_web::server::HttpServer;
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use lemmy_server::actix_web::{ws, App, Error, HttpRequest, HttpResponse, fs::NamedFile, fs};
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use lemmy_server::websocket::server::*;
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use lemmy_server::establish_connection;
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embed_migrations!();
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/// How often heartbeat pings are sent
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const HEARTBEAT_INTERVAL: Duration = Duration::from_secs(5);
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/// How long before lack of client response causes a timeout
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const CLIENT_TIMEOUT: Duration = Duration::from_secs(10);
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/// This is our websocket route state, this state is shared with all route
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/// instances via `HttpContext::state()`
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struct WsChatSessionState {
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addr: Addr<ChatServer>,
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}
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/// Entry point for our route
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fn chat_route(req: &HttpRequest<WsChatSessionState>) -> Result<HttpResponse, Error> {
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ws::start(
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req,
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WSSession {
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id: 0,
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hb: Instant::now(),
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ip: req.connection_info().remote().unwrap_or("127.0.0.1:12345").split(":").next().unwrap_or("127.0.0.1").to_string()
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},
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)
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}
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struct WSSession {
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/// unique session id
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id: usize,
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ip: String,
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/// Client must send ping at least once per 10 seconds (CLIENT_TIMEOUT),
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/// otherwise we drop connection.
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hb: Instant
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}
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impl Actor for WSSession {
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type Context = ws::WebsocketContext<Self, WsChatSessionState>;
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/// Method is called on actor start.
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/// We register ws session with ChatServer
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fn started(&mut self, ctx: &mut Self::Context) {
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// we'll start heartbeat process on session start.
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self.hb(ctx);
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// register self in chat server. `AsyncContext::wait` register
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// future within context, but context waits until this future resolves
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// before processing any other events.
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// HttpContext::state() is instance of WsChatSessionState, state is shared
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// across all routes within application
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let addr = ctx.address();
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ctx.state()
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.addr
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.send(Connect {
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addr: addr.recipient(),
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ip: self.ip.to_owned(),
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})
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.into_actor(self)
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.then(|res, act, ctx| {
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match res {
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Ok(res) => act.id = res,
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// something is wrong with chat server
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_ => ctx.stop(),
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}
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fut::ok(())
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})
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.wait(ctx);
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}
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fn stopping(&mut self, ctx: &mut Self::Context) -> Running {
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// notify chat server
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ctx.state().addr.do_send(Disconnect {
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id: self.id,
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ip: self.ip.to_owned(),
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});
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Running::Stop
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}
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}
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/// Handle messages from chat server, we simply send it to peer websocket
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/// These are room messages, IE sent to others in the room
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impl Handler<WSMessage> for WSSession {
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type Result = ();
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fn handle(&mut self, msg: WSMessage, ctx: &mut Self::Context) {
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// println!("id: {} msg: {}", self.id, msg.0);
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ctx.text(msg.0);
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}
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}
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/// WebSocket message handler
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impl StreamHandler<ws::Message, ws::ProtocolError> for WSSession {
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fn handle(&mut self, msg: ws::Message, ctx: &mut Self::Context) {
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// println!("WEBSOCKET MESSAGE: {:?} from id: {}", msg, self.id);
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match msg {
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ws::Message::Ping(msg) => {
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self.hb = Instant::now();
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ctx.pong(&msg);
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}
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ws::Message::Pong(_) => {
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self.hb = Instant::now();
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}
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ws::Message::Text(text) => {
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let m = text.trim().to_owned();
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ctx.state()
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.addr
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.send(StandardMessage {
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id: self.id,
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msg: m,
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})
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.into_actor(self)
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.then(|res, _, ctx| {
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match res {
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Ok(res) => ctx.text(res),
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Err(e) => {
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eprintln!("{}", &e);
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// ctx.text(e);
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}
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}
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// Ok(res) => ctx.text(res),
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// // something is wrong with chat server
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// _ => ctx.stop(),
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fut::ok(())
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})
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.wait(ctx);
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// we check for /sss type of messages
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// if m.starts_with('/') {
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// let v: Vec<&str> = m.splitn(2, ' ').collect();
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// match v[0] {
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// "/list" => {
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// // Send ListRooms message to chat server and wait for
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// // response
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// println!("List rooms");
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// ctx.state()
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// .addr
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// .send(ListRooms)
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// .into_actor(self)
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// .then(|res, _, ctx| {
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// match res {
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// Ok(rooms) => {
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// for room in rooms {
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// ctx.text(room);
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// }
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// }
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// _ => println!("Something is wrong"),
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// }
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// fut::ok(())
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// })
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// .wait(ctx)
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// .wait(ctx) pauses all events in context,
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// so actor wont receive any new messages until it get list
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// of rooms back
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// }
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// "/join" => {
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// if v.len() == 2 {
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// self.room = v[1].to_owned();
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// ctx.state().addr.do_send(Join {
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// id: self.id,
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// name: self.room.clone(),
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// });
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// ctx.text("joined");
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// } else {
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// ctx.text("!!! room name is required");
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// }
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// }
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// "/name" => {
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// if v.len() == 2 {
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// self.name = Some(v[1].to_owned());
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// } else {
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// ctx.text("!!! name is required");
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// }
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// }
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// _ => ctx.text(format!("!!! unknown command: {:?}", m)),
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// }
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// } else {
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// let msg = if let Some(ref name) = self.name {
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// format!("{}: {}", name, m)
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// } else {
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// m.to_owned()
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// };
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// send message to chat server
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// ctx.state().addr.do_send(ClientMessage {
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// id: self.id,
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// msg: msg,
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// room: self.room.clone(),
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// })
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// }
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}
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ws::Message::Binary(_bin) => println!("Unexpected binary"),
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ws::Message::Close(_) => {
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ctx.stop();
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},
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}
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}
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}
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impl WSSession {
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/// helper method that sends ping to client every second.
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///
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/// also this method checks heartbeats from client
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fn hb(&self, ctx: &mut ws::WebsocketContext<Self, WsChatSessionState>) {
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ctx.run_interval(HEARTBEAT_INTERVAL, |act, ctx| {
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// check client heartbeats
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if Instant::now().duration_since(act.hb) > CLIENT_TIMEOUT {
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// heartbeat timed out
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println!("Websocket Client heartbeat failed, disconnecting!");
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// notify chat server
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ctx.state()
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.addr
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.do_send(Disconnect { id: act.id, ip: act.ip.to_owned() });
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// stop actor
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ctx.stop();
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// don't try to send a ping
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return;
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}
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ctx.ping("");
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});
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}
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}
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fn main() {
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let _ = env_logger::init();
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let sys = actix::System::new("lemmy");
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// Run the migrations from code
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let conn = establish_connection();
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embedded_migrations::run(&conn).unwrap();
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// Start chat server actor in separate thread
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let server = Arbiter::start(|_| ChatServer::default());
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// Create Http server with websocket support
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HttpServer::new(move || {
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// Websocket sessions state
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let state = WsChatSessionState {
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addr: server.clone(),
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};
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App::with_state(state)
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// redirect to websocket.html
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// .resource("/", |r| r.method(http::Method::GET).f(|_| {
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// HttpResponse::Found()
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// .header("LOCATION", "/static/websocket.html")
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// .finish()
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// }))
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.resource("/service/ws", |r| r.route().f(chat_route))
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// static resources
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.resource("/", |r| r.route().f(index))
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.handler(
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"/static",
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fs::StaticFiles::new(front_end_dir()).unwrap()
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)
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.finish()
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}).bind("0.0.0.0:8536")
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.unwrap()
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.start();
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println!("Started http server: 0.0.0.0:8536");
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let _ = sys.run();
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}
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fn index(_req: &HttpRequest<WsChatSessionState>) -> Result<NamedFile, actix_web::error::Error> {
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Ok(NamedFile::open(front_end_dir() + "/index.html")?)
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}
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fn front_end_dir() -> String {
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env::var("LEMMY_FRONT_END_DIR").unwrap_or("../ui/dist".to_string())
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}
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