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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html lang="en">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title>echoclient.html Example File | Qt WebSockets 5.5</title>
  <link rel="stylesheet" type="text/css" href="style/offline.css" />
</head>
<body>
<div class="header" id="qtdocheader">
    <div class="main">
    <div class="main-rounded">
        <div class="navigationbar">
        <ul>
<li>Qt 5.5</li>
<li><a href="qtwebsockets-index.html">Qt WebSockets</a></li>
<li><a href="qtwebsockets-echoserver-example.html">Echo Server Example</a></li>
<li>echoclient.html Example File</li>
<li id="buildversion">Qt 5.5.1 Reference Documentation</li>
    </ul>
    </div>
</div>
<div class="content">
<div class="line">
<div class="content mainContent">
<div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div>
<h1 class="title">echoclient.html Example File</h1>
<span class="subtitle">echoserver/echoclient.html</span>
<!-- $$$echoserver/echoclient.html-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">&lt;html&gt;
    &lt;head&gt;
        &lt;title&gt;WebSocket Echo Client&lt;/title&gt;
    &lt;/head&gt;
    &lt;body&gt;
        &lt;h1&gt;WebSocket Echo Client&lt;/h1&gt;
        &lt;p&gt;
            &lt;button onClick=&quot;initWebSocket();&quot;&gt;Connect&lt;/button&gt;
            &lt;button onClick=&quot;stopWebSocket();&quot;&gt;Disconnect&lt;/button&gt;
            &lt;button onClick=&quot;checkSocket();&quot;&gt;State&lt;/button&gt;
        &lt;/p&gt;
        &lt;p&gt;
            &lt;textarea id=&quot;debugTextArea&quot; style=&quot;width:400px;height:200px;&quot;&gt;&lt;/textarea&gt;
        &lt;/p&gt;
        &lt;p&gt;
            &lt;input type=&quot;text&quot; id=&quot;inputText&quot; onkeydown=&quot;if(event.keyCode==13)sendMessage();&quot;/&gt;
            &lt;button onClick=&quot;sendMessage();&quot;&gt;Send&lt;/button&gt;
        &lt;/p&gt;

        &lt;script type=&quot;text/javascript&quot;&gt;
            var debugTextArea = document.getElementById(&quot;debugTextArea&quot;);
            function debug(message) {
                debugTextArea.value += message + &quot;\n&quot;;
                debugTextArea.scrollTop = debugTextArea.scrollHeight;
            }

            function sendMessage() {
                var msg = document.getElementById(&quot;inputText&quot;).value;
                if ( websocket != null )
                {
                    document.getElementById(&quot;inputText&quot;).value = &quot;&quot;;
                    websocket.send( msg );
                    console.log( &quot;string sent :&quot;, '&quot;'+msg+'&quot;' );
                }
            }

            var wsUri = &quot;ws://localhost:1234&quot;;
            var websocket = null;

            function initWebSocket() {
                try {
                    if (typeof MozWebSocket == 'function')
                        WebSocket = MozWebSocket;
                    if ( websocket &amp;&amp; websocket.readyState == 1 )
                        websocket.close();
                    websocket = new WebSocket( wsUri );
                    websocket.onopen = function (evt) {
                        debug(&quot;CONNECTED&quot;);
                    };
                    websocket.onclose = function (evt) {
                        debug(&quot;DISCONNECTED&quot;);
                    };
                    websocket.onmessage = function (evt) {
                        console.log( &quot;Message received :&quot;, evt.data );
                        debug( evt.data );
                    };
                    websocket.onerror = function (evt) {
                        debug('ERROR: ' + evt.data);
                    };
                } catch (exception) {
                    debug('ERROR: ' + exception);
                }
            }

            function stopWebSocket() {
                if (websocket)
                    websocket.close();
            }

            function checkSocket() {
                if (websocket != null) {
                    var stateStr;
                    switch (websocket.readyState) {
                        case 0: {
                            stateStr = &quot;CONNECTING&quot;;
                            break;
                        }
                        case 1: {
                            stateStr = &quot;OPEN&quot;;
                            break;
                        }
                        case 2: {
                            stateStr = &quot;CLOSING&quot;;
                            break;
                        }
                        case 3: {
                            stateStr = &quot;CLOSED&quot;;
                            break;
                        }
                        default: {
                            stateStr = &quot;UNKNOW&quot;;
                            break;
                        }
                    }
                    debug(&quot;WebSocket state = &quot; + websocket.readyState + &quot; ( &quot; + stateStr + &quot; )&quot;);
                } else {
                    debug(&quot;WebSocket is null&quot;);
                }
            }
        &lt;/script&gt;
    &lt;/body&gt;
&lt;/html&gt;</pre>
</div>
<!-- @@@echoserver/echoclient.html -->
        </div>
       </div>
   </div>
   </div>
</div>
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   <p>
   <acronym title="Copyright">&copy;</acronym> 2015 The Qt Company Ltd.
   Documentation contributions included herein are the copyrights of
   their respective owners.<br>    The documentation provided herein is licensed under the terms of the    <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation    License version 1.3</a> as published by the Free Software Foundation.<br>    Qt and respective logos are trademarks of The Qt Company Ltd.     in Finland and/or other countries worldwide. All other trademarks are property
   of their respective owners. </p>
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</html>