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112
server/main.js
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112
server/main.js
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import http from "http";
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import path from "path";
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import fs, { openSync } from "fs";
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import Log from "../common/log.js";
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import { init as initWS } from "./ws.js";
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var PORT = 3000;
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var mime_types = {
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'html': 'text/html',
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'css': 'text/css',
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'js': 'application/javascript',
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'png': 'image/png',
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'jpg': 'image/jpg',
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'gif': 'image/gif',
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};
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process.argv.forEach((arg, index) => {
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if (index < 2) return;
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if (!arg.startsWith('-')) return;
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switch (arg.substring(1)) {
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case "port":
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if (process.argv.length < index + 2) {
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Log.error("FATAL: -port was supplied with no arguments.");
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exit(1);
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}
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var val = process.argv[index + 1];
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if (val.startsWith('-')) {
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Log.error("FATAL: -port was supplied with no arguments.");
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exit(1);
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}
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var port = Number(val);
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if (isNaN(port)) {
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Log.error("FATAL: -port was supplied with invalid arguments.");
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exit(1);
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}
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PORT = port;
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break;
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}
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});
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const server = http.createServer(async (req, res) => {
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var code = await new Promise((resolve) => {
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if (req.method !== "GET") {
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res.writeHead(501, {
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"Content-Type": "text/plain",
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"Server": "ari's awesome server"
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});
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res.end("Not Implemented");
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return resolve(501);
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}
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// find the file
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var filepath = path.join("client", req.url);
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if (req.url.startsWith("/common/")) {
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filepath = path.join("common", req.url.slice(8));
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}
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if (filepath.endsWith('/') || filepath.endsWith('\\')) {
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filepath = path.join(filepath, "index.html");
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}
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if (!fs.existsSync(filepath)) {
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res.writeHead(404, {
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"Content-Type": "text/plain",
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"Server": "ari's awesome server"
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});
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res.end("Not Found");
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return resolve(404);
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}
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try {
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var ext = path.extname(filepath).slice(1);
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var mime_type = mime_types[ext] || "application/octet-stream";
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const stream = fs.createReadStream(filepath);
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res.writeHead(200, {
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"Content-Type": mime_type,
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"Server": "ari's awesome server"
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});
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stream.pipe(res);
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return resolve(200);
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stream.on("open", () => {
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res.writeHead(200, {
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"Content-Type": mime_type,
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"Server": "ari's awesome server"
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});
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stream.pipe(res);
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res.end();
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return resolve(200);
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});
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stream.on("error", error => {
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throw error;
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});
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} catch (error) {
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Log.error(error);
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res.writeHead(500, {
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"Content-Type": "text/plain",
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"Server": "ari's awesome server"
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});
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res.end("Internal Server Error");
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return resolve(500);
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}
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});
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Log.info(`${code} - ${req.method} ${req.url}`);
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});
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initWS(server);
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server.on("listening", () => {
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Log.info("server listening on port " + PORT);
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});
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server.listen(PORT, "0.0.0.0")
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231
server/ws.js
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231
server/ws.js
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@ -0,0 +1,231 @@
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import { WebSocketServer } from "ws";
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import Log from "../common/log.js";
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import { WORLD_SIZE } from "../common/world.js";
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import Player from "../common/player.js";
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import Prop from "../common/prop.js";
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const TICK_RATE = 30;
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var clients = [];
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var props = {
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1: new Prop("the silly",
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WORLD_SIZE / 2, WORLD_SIZE / 2,
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"#ff00ff", "/img/ball.png")
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};
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var last_update = 0.0;
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var ticks = 0;
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var wss;
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export function init(http_server) {
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wss = new WebSocketServer({ server: http_server });
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wss.on("connection", (socket) => {
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clients.push(socket);
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socket.on("error", error => {
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Log.warn("Websocket connection closed due to error: " + error);
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if (socket.player) {
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broadcast({
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type: "leave",
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id: socket.id,
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});
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}
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clients = clients.filter(s => s != socket);
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});
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socket.on("close", () => {
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if (socket.player) {
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Log.info(socket.player.name + " left the game.");
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broadcast({
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type: "leave",
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id: socket.id,
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});
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}
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clients = clients.filter(s => s != socket);
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});
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socket.on("message", msg => {
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try {
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const data = JSON.parse(msg);
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if (!data.type)
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throw new Error("Type not specified");
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switch (data.type) {
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case "join":
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if (!data.name)
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throw new Error("Name cannot be null");
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var player_name = data.name.slice(0, 32);
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player_name = player_name.replaceAll('<', '<');
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player_name = player_name.replaceAll('>', '>');
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player_name = player_name.trim();
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socket.id = generateID();
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socket.player = new Player(
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data.name.slice(0, 32),
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WORLD_SIZE / 2,
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WORLD_SIZE / 2,
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randomColour()
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);
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Log.info(socket.player.name + " joined the game.");
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var lobby_players = {};
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clients.forEach(client => {
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if (!client.player) return;
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lobby_players[client.id] = {
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name: client.player.name,
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x: client.player.x,
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y: client.player.y,
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col: client.player.colour,
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};
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});
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var lobby_props = {};
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Object.keys(props).forEach(id => {
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const prop = props[id];
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lobby_props[id] = {
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name: prop.name,
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x: prop.x,
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y: prop.y,
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col: prop.colour,
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sprite: prop.sprite,
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}
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});
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socket.send(JSON.stringify({
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type: "welcome",
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id: socket.id,
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tick: ticks,
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players: lobby_players,
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props: lobby_props,
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}));
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clients.forEach(s => {
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if (s.id == socket.id) return;
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// send player joined event
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s.send(JSON.stringify({
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type: "join",
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id: socket.id,
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name: socket.player.name,
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x: socket.player.x,
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y: socket.player.y,
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col: socket.player.colour,
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}));
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});
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break;
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case "update":
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if (!socket.player)
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throw new Error("Player does not exist");
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if (data.x === undefined || data.y === undefined)
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throw new Error("Movement vector not provided");
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if (data.tick === undefined)
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throw new Error("User tick not provided");
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socket.player.tick = data.tick;
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socket.player.in_x = Math.min(1.0, data.x);
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socket.player.in_y = Math.min(1.0, data.y);
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break;
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case "chat":
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if (data.msg === undefined)
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throw new Error("Attempted chat with no message");
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Log.info('<' + socket.player.name + '> ' + data.msg)
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data.msg = data.msg.replaceAll("<", "<")
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data.msg = data.msg.replaceAll(">", ">")
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data.msg = data.msg.replaceAll("\n", "");
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data.msg = data.msg.trim();
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if (data.msg == "") return;
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clients.forEach(client => {
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client.send(JSON.stringify({
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type: "chat",
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player: socket.id,
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msg: data.msg,
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}));
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});
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break;
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default:
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throw new Error("Invalid message type");
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}
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} catch (error) {
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if (socket.player) {
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Log.warn("Received invalid packet from " + socket.player.id + ": " + error);
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socket.send(JSON.stringify({
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type: "kick",
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reason: "Received invalid packet",
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}));
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} else {
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Log.warn("Received invalid packet: " + error);
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}
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socket.close();
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}
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});
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});
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update();
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}
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function update() {
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var delta = (performance.now() - last_update) / 1000;
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// update players
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var frame_players = {};
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clients.forEach(client => {
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if (!client.player) return;
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client.player.update(delta);
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client.player.x = Math.max(Math.min(client.player.x, WORLD_SIZE), 0);
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client.player.y = Math.max(Math.min(client.player.y, WORLD_SIZE), 0);
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frame_players[client.id] = {
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x: client.player.x,
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y: client.player.y,
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};
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});
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// god help me this code is awful
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// really leaning on this just being a tech demo here
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var prop_players = [];
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clients.forEach(client => {
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if (client.player) prop_players.push(client.player);
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});
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var frame_props = {};
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Object.keys(props).forEach(id => {
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const prop = props[id];
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prop.update(delta, prop_players);
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frame_props[id] = {
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x: prop.x,
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y: prop.y,
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}
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});
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// send update to players
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clients.forEach(client => {
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if (!client.player) return;
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client.send(JSON.stringify({
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type: "update",
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tick: client.player.tick,
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players: frame_players,
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props: frame_props,
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}));
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})
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last_update = performance.now();
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ticks++;
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setTimeout(update, 1000 / TICK_RATE);
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}
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function broadcast(data) {
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clients.forEach(socket => {
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socket.send(JSON.stringify(data));
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});
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}
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function generateID() {
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// five random digits followed by five digits from the end of unix timestamp
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return (10000 + Math.floor(Math.random() * 90000)).toString() + (new Date() % 100000).toString();
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}
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function randomColour() {
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var res = "#";
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for (var i = 0; i < 6; i++)
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res += "0123456789abcdef"[Math.floor(Math.random() * 16)];
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return res;
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}
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