fix server.close() issue

js/server.js

@@ -23,6 +23,7 @@ const Utils = require("./utils.js");
  */
 function Server(config, callback) {
 	const port = process.env.MM_PORT || config.port;
+	const serverSockets = new Set();
 
 	let server = null;
 	if (config.useHttps) {
@@ -42,6 +43,13 @@ function Server(config, callback) {
 		allowEIO3: true
 	});
 
+	server.on("connection", (socket) => {
+		serverSockets.add(socket);
+		socket.on("close", () => {
+			serverSockets.delete(socket);
+		});
+	});
+
 	Log.log(`Starting server on port ${port} ... `);
 
 	server.listen(port, config.address || "localhost");
@@ -94,6 +102,9 @@ function Server(config, callback) {
 	}
 
 	this.close = function () {
+		for (const socket of serverSockets.values()) {
+			socket.destroy();
+		}
 		server.close();
 	};
 }