Renamed Files Added Connector

Connect.js

@@ -0,0 +1,25 @@
+let socket = new WebSocket("wss://javascript.info/article/websocket/demo/hello");
+
+socket.onopen = function (e) {
+    alert("[open] Connection established");
+    alert("Sending to server");
+    socket.send("My name is John");
+};
+
+socket.onmessage = function (event) {
+    alert(`[message] Data received from server: ${event.data}`);
+};
+
+socket.onclose = function (event) {
+    if (event.wasClean) {
+        alert(`[close] Connection closed cleanly, code=${event.code} reason=${event.reason}`);
+    } else {
+        // e.g. server process killed or network down
+        // event.code is usually 1006 in this case
+        alert('[close] Connection died');
+    }
+};
+
+socket.onerror = function (error) {
+    alert(`[error] ${error.message}`);
+};

HtmlPage.html

@@ -40,13 +40,13 @@
         <input type="submit" value="Go!">
     </form>
 
-
-    <table class="table">
     <th>Bezeichnung</th>
     <th>Kaufort</th>
     <th>Anz</th>
     <th>E-Preis</th>
     <th>G-Preis</th>
+    <table class="table">
+
         <script type="text/javascript">
             //var mydata = JSON.parse(stadtbezirk);
             var sumpreis = 0;

JavaScript.js

@@ -1 +0,0 @@
-

Server.js

@@ -0,0 +1,36 @@
+
+const http = require('http');
+const ws = require('ws');
+
+const wss = new ws.Server({ noServer: true });
+
+function accept(req, res) {
+    // all incoming requests must be websockets
+    if (!req.headers.upgrade || req.headers.upgrade.toLowerCase() != 'websocket') {
+        res.end();
+        return;
+    }
+
+    // can be Connection: keep-alive, Upgrade
+    if (!req.headers.connection.match(/\bupgrade\b/i)) {
+        res.end();
+        return;
+    }
+
+    wss.handleUpgrade(req, req.socket, Buffer.alloc(0), onConnect);
+}
+
+function onConnect(ws) {
+    ws.on('message', function (message) {
+        let name = message.match(/([\p{Alpha}\p{M}\p{Nd}\p{Pc}\p{Join_C}]+)$/gu) || "Guest";
+        ws.send(`Hello from server, ${name}!`);
+
+        setTimeout(() => ws.close(1000, "Bye!"), 50000);
+    });
+}
+
+if (!module.parent) {
+    http.createServer(accept).listen(8080);
+} else {
+    exports.accept = accept;
+}