lemmy/server/src/main.rs

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extern crate lemmy_server;
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#[macro_use]
extern crate diesel_migrations;
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use actix::prelude::*;
use actix_files::NamedFile;
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use actix_web::*;
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use actix_web_actors::ws;
use lemmy_server::apub;
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use lemmy_server::db::establish_connection;
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use lemmy_server::feeds;
use lemmy_server::nodeinfo;
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use lemmy_server::settings::Settings;
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use lemmy_server::webfinger;
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use lemmy_server::websocket::server::*;
use std::env;
use std::time::{Duration, Instant};
embed_migrations!();
/// How often heartbeat pings are sent
const HEARTBEAT_INTERVAL: Duration = Duration::from_secs(5);
/// How long before lack of client response causes a timeout
const CLIENT_TIMEOUT: Duration = Duration::from_secs(10);
/// Entry point for our route
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fn chat_route(
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req: HttpRequest,
stream: web::Payload,
chat_server: web::Data<Addr<ChatServer>>,
) -> Result<HttpResponse, Error> {
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ws::start(
WSSession {
cs_addr: chat_server.get_ref().to_owned(),
id: 0,
hb: Instant::now(),
ip: req
.connection_info()
.remote()
.unwrap_or("127.0.0.1:12345")
.split(":")
.next()
.unwrap_or("127.0.0.1")
.to_string(),
},
&req,
stream,
)
}
struct WSSession {
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cs_addr: Addr<ChatServer>,
/// unique session id
id: usize,
ip: String,
/// Client must send ping at least once per 10 seconds (CLIENT_TIMEOUT),
/// otherwise we drop connection.
hb: Instant,
}
impl Actor for WSSession {
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type Context = ws::WebsocketContext<Self>;
/// Method is called on actor start.
/// We register ws session with ChatServer
fn started(&mut self, ctx: &mut Self::Context) {
// we'll start heartbeat process on session start.
self.hb(ctx);
// register self in chat server. `AsyncContext::wait` register
// future within context, but context waits until this future resolves
// before processing any other events.
// across all routes within application
let addr = ctx.address();
self
.cs_addr
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.send(Connect {
addr: addr.recipient(),
ip: self.ip.to_owned(),
})
.into_actor(self)
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.then(|res, act, ctx| {
match res {
Ok(res) => act.id = res,
// something is wrong with chat server
_ => ctx.stop(),
}
fut::ok(())
})
.wait(ctx);
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}
fn stopping(&mut self, _ctx: &mut Self::Context) -> Running {
// notify chat server
self.cs_addr.do_send(Disconnect {
id: self.id,
ip: self.ip.to_owned(),
});
Running::Stop
}
}
/// Handle messages from chat server, we simply send it to peer websocket
/// These are room messages, IE sent to others in the room
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) {
// println!("id: {} msg: {}", self.id, msg.0);
ctx.text(msg.0);
}
}
/// WebSocket message handler
impl StreamHandler<ws::Message, ws::ProtocolError> for WSSession {
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fn handle(&mut self, msg: ws::Message, ctx: &mut Self::Context) {
// println!("WEBSOCKET MESSAGE: {:?} from id: {}", msg, self.id);
match msg {
ws::Message::Ping(msg) => {
self.hb = Instant::now();
ctx.pong(&msg);
}
ws::Message::Pong(_) => {
self.hb = Instant::now();
}
ws::Message::Text(text) => {
let m = text.trim().to_owned();
println!("WEBSOCKET MESSAGE: {:?} from id: {}", &m, self.id);
self
.cs_addr
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.send(StandardMessage {
id: self.id,
msg: m,
})
.into_actor(self)
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.then(|res, _, ctx| {
match res {
Ok(res) => ctx.text(res),
Err(e) => {
eprintln!("{}", &e);
}
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}
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fut::ok(())
})
.wait(ctx);
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}
ws::Message::Binary(_bin) => println!("Unexpected binary"),
ws::Message::Close(_) => {
ctx.stop();
}
_ => {}
}
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}
}
impl WSSession {
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/// helper method that sends ping to client every second.
///
/// also this method checks heartbeats from client
fn hb(&self, ctx: &mut ws::WebsocketContext<Self>) {
ctx.run_interval(HEARTBEAT_INTERVAL, |act, ctx| {
// check client heartbeats
if Instant::now().duration_since(act.hb) > CLIENT_TIMEOUT {
// heartbeat timed out
println!("Websocket Client heartbeat failed, disconnecting!");
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// notify chat server
act.cs_addr.do_send(Disconnect {
id: act.id,
ip: act.ip.to_owned(),
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});
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// stop actor
ctx.stop();
// don't try to send a ping
return;
}
ctx.ping("");
});
}
}
fn main() {
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let _ = env_logger::init();
let sys = actix::System::new("lemmy");
// Run the migrations from code
let conn = establish_connection();
embedded_migrations::run(&conn).unwrap();
// Start chat server actor in separate thread
let server = ChatServer::default().start();
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let settings = Settings::get();
// Create Http server with websocket support
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HttpServer::new(move || {
let app = App::new()
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.data(server.clone())
// Front end routes
.service(actix_files::Files::new("/static", front_end_dir()))
.route("/", web::get().to(index))
.route(
"/home/type/{type}/sort/{sort}/page/{page}",
web::get().to(index),
)
.route("/login", web::get().to(index))
.route("/create_post", web::get().to(index))
.route("/create_community", web::get().to(index))
.route("/communities/page/{page}", web::get().to(index))
.route("/communities", web::get().to(index))
.route("/post/{id}/comment/{id2}", web::get().to(index))
.route("/post/{id}", web::get().to(index))
.route("/c/{name}/sort/{sort}/page/{page}", web::get().to(index))
.route("/c/{name}", web::get().to(index))
.route("/community/{id}", web::get().to(index))
.route(
"/u/{username}/view/{view}/sort/{sort}/page/{page}",
web::get().to(index),
)
.route("/u/{username}", web::get().to(index))
.route("/user/{id}", web::get().to(index))
.route("/inbox", web::get().to(index))
.route("/modlog/community/{community_id}", web::get().to(index))
.route("/modlog", web::get().to(index))
.route("/setup", web::get().to(index))
.route(
"/search/q/{q}/type/{type}/sort/{sort}/page/{page}",
web::get().to(index),
)
.route("/search", web::get().to(index))
.route("/sponsors", web::get().to(index))
.route("/password_change/{token}", web::get().to(index))
// Websocket
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.service(web::resource("/api/v1/ws").to(chat_route))
// NodeInfo
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.route("/nodeinfo/2.0.json", web::get().to(nodeinfo::node_info))
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.route(
"/.well-known/nodeinfo",
web::get().to(nodeinfo::node_info_well_known),
)
// RSS
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.route("/feeds/{type}/{name}.xml", web::get().to(feeds::get_feed))
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.route("/feeds/all.xml", web::get().to(feeds::get_all_feed))
// Federation
.route(
"/federation/c/{community_name}",
web::get().to(apub::community::get_apub_community),
)
.route(
"/federation/c/{community_name}/followers",
web::get().to(apub::community::get_apub_community_followers),
)
.route(
"/federation/u/{user_name}",
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web::get().to(apub::user::get_apub_user))
.route("/feeds/all.xml", web::get().to(feeds::get_all_feed));
// Federation
if Settings::get().federation_enabled {
app.route(
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".well-known/webfinger",
web::get().to(webfinger::get_webfinger_response),
)
} else {
app
}
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})
.bind((settings.bind, settings.port))
.unwrap()
.start();
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println!("Started http server at {}:{}", settings.bind, settings.port);
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let _ = sys.run();
}
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fn index() -> Result<NamedFile, actix_web::error::Error> {
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Ok(NamedFile::open(front_end_dir() + "/index.html")?)
}
fn front_end_dir() -> String {
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env::var("LEMMY_FRONT_END_DIR").unwrap_or("../ui/dist".to_string())
}