dzura/server/src/main.rs

use std::net::SocketAddr;

use bus::Bus;

mod util;
mod app;
mod system;
mod protocol;
mod manager;

use app::App;
use hyper::body::Bytes;
use hyper_util::rt::TokioIo;
use system::{cache::WebCache, net::Stream};

#[derive(Clone)]
struct HttpServiceArgs {
    bus:Bus<protocol::QRPacket>,
    cache:WebCache,
}

async fn service_http(mut request:hyper::Request<hyper::body::Incoming>, args:HttpServiceArgs) -> Result<hyper::Response<http_body_util::Full<Bytes>>, std::convert::Infallible>
// Serve cached files and upgrade websocket connections.
//
{
    use hyper::{Response, body::Bytes, header::{CONTENT_TYPE, CACHE_CONTROL}};
    use http_body_util::Full;

    println!("Serving: {}", request.uri().path());

    if hyper_tungstenite::is_upgrade_request(&request) {
        if let Ok((response, websocket)) = hyper_tungstenite::upgrade(&mut request, None) {
            tokio::task::spawn(async move {
                match websocket.await {
                    Ok(websocket) => manager::handle_ws(websocket, args).await,
                    Err(_) => Err(()),
                }.ok()
            });

            Ok(response)
        } else {
            Ok(Response::builder()
                .status(401)
                .body(Full::new(Bytes::new()))
                    .unwrap())
        }
    } else {
        match request.uri().path() {
            "/" => Ok(Response::builder()
                .header(CONTENT_TYPE, "text/html")
                .header(CACHE_CONTROL, "no-cache")
                .body(Full::new(Bytes::from(args.cache.fetch("/.html").unwrap().data))).unwrap()),

            _ => match args.cache.fetch(request.uri().path()) {
                Some(data) => Ok(Response::builder()
                    .header(CONTENT_TYPE, &data.mime)
                    .header(CACHE_CONTROL, "no-cache")
                    .body(Full::new(Bytes::from(data.data))).unwrap()),
                None => Ok(Response::builder()
                    .status(404)
                    .body(Full::new(Bytes::new())).unwrap())
            }
        }
    }
}

async fn handle_http(stream:system::net::tls::TlsStream, addr:SocketAddr, args:HttpServiceArgs) -> Result<(),()>
// Hand off socket connection to Hyper server.
//
{
    use hyper::server::conn::http1;
    use hyper::service::service_fn;

    println!("Connection from {}", addr.to_string());

    let io = TokioIo::new(stream.to_stream());

    let conn = http1::Builder::new()
        .serve_connection(io, service_fn(move |req| {
            service_http(req, args.clone())
        }));
    
    conn.with_upgrades().await.ok();
    Ok(())
}


#[tokio::main(flavor = "multi_thread", worker_threads = 12)]
async fn main()
{
    use system::net::{
        Server,
        tls::*,
    };

    // Initialize application data.
    let app;
    if let Ok(result) = App::init() {
        app = result;
    } else {
        println!("fatal: failed to initialize server.");
        return;
    }

    // Initialize central bus and data serivce.
    let b_main :Bus<protocol::QRPacket> = Bus::new_as(bus::Mode::Transmitter);
    match b_main.connect() {
        Ok(bus) => {
            tokio::spawn(async move {
                manager::thread_system(app, bus).await;
            });
        }
        Err(_) => {
            println!("fatal: failed to initialize bus.");
            return;
        }
    }


    // Initialize HTTPS service.
    match b_main.connect() {
        Ok(bus) => {
            let cache = WebCache::new();
            cache.cache_file("text/html", "/.html", "www/.html").ok();
            cache.cache_whitespace_minimize("/.html").ok();
            cache.cache_file_group("text/css", "/.css", &[
                "www/css/main.css",
                "www/css/util.css",
                "www/css/ui.css",
                "www/css/form.css",
                "www/css/game.css",
            ]).ok();
            cache.cache_file_group("text/javascript", "/.js", &[
                "www/js/const.js",
                "www/js/util.js",
                "www/js/game_asset.js",
                "www/js/game.js",
                "www/js/interface.js",
                "www/js/ui.js",
                "www/js/scene.js",
                "www/js/system.js",
                "www/js/main.js",
            ]).ok();
            cache.cache_file("image/png", "/favicon.png", "www/asset/favicon.png").ok();

            let asset_path = std::path::Path::new("www/asset");
            for asset in [
                "promote.svg",

                "omen_dawn.svg",
                "dragon_dawn.svg",
                "castle_dawn.svg",
                "tower_dawn.svg",
                "lance_dawn.svg",
                "knight_dawn.svg",
                "militia_dawn.svg",

                "omen_dusk.svg",
                "dragon_dusk.svg",
                "castle_dusk.svg",
                "tower_dusk.svg",
                "lance_dusk.svg",
                "knight_dusk.svg",
                "militia_dusk.svg",
            ] {
                if cache.cache_file("image/svg+xml", &format!("/asset/{}", asset), asset_path.join(asset)).is_err() {
                    println!("error: failed to load: {}", asset);
                }
            }

            let mut server = TlsServer::new();
            if server.add_cert("omen.kirisame.com", "cert/fullchain.pem", "cert/privkey.pem").await.is_ok() {
                println!("Loaded cert file.");
            }
            match server.bind("0.0.0.0:38612").await {
                Ok(_) => {
                    println!("Listener bind successful.");
                    tokio::spawn(async move {
                        while server.accept(handle_http, HttpServiceArgs {
                            bus:bus.connect().unwrap(),
                            cache:cache.clone(),
                        }).await.is_ok() { }
                    });
                }
                Err(_) => {
                    println!("error: failed to bind port 38612.");
                }
            }
        }
        Err(_) => {
            println!("error: failed to initialize HTTPS service.");
        }
    }

    loop { tokio::time::sleep(tokio::time::Duration::from_secs(10)).await; }
}