Add test.html

examples/websocket-server/README.md

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+See detailed tutorial at https://mongoose.ws/tutorials/websocket-server/

examples/websocket-server/test.html

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+<!DOCTYPE html>
+<html lang="en">
+  <body>
+    <h1>Websocket test client</h1>
+    <input id="url" type="text" placeholder="Type URL" value="ws://localhost:8000/websocket" style="width:20em;" /> 
+    <button id="connect">connect</button>
+    <div style="height: 0.3em;">&nbsp;</div>
+    <input id="message" type="text" placeholder="Type message" style="width: 20em;" /> 
+    <button id="send">send message</button>
+    <div style="margin-top: 1em;">Event log:</div>
+    <div id="log" style="background: #eee; height: 10em; padding: 0.5em;"><div>
+  </body>
+  <script>
+    var ws, E = function(id) { return document.getElementById(id); };
+    var url = E('url'), connect = E('connect'), message = E('message'), send = E('send'), log = E('log');
+    var enable = function(en) { message.disabled = send.disabled = !en; url.disabled = en; connect.innerHTML = en ? 'disconnect' : 'connect'; };
+    enable(false)
+    connect.onclick = function() {
+      if (ws) { ws.close(); return; }
+      ws = new WebSocket(url.value);
+      if (!ws) return;
+      ws.onopen = function() { log.innerHTML += 'CONNECTION OPENED<br/>'; }
+      ws.onmessage = function(ev) { log.innerHTML += 'RECEIVED: ' + ev.data + '<br/>'; }
+      ws.onerror = function(ev) { log.innerHTML += 'ERROR: ' + ev + '<br/>'; }
+      ws.onclose = function() { log.innerHTML += 'CONNECTION CLOSED<br/>'; enable(false); ws = null; }
+      enable(true);
+    };
+    send.onclick = function() {
+      if (!ws) return;
+      log.innerHTML += 'SENT: ' + message.value + '<br/>';
+      ws.send(message.value);
+    }
+  </script>
+</html>