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<!DOCTYPE html>
<html>
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<head>
    <title>Speedtest</title>
    <style type="text/css">
        html,
        body {
            margin: 0;
            padding: 0;
            border: none;
            text-align: center;
        }

        div.test {
            display: inline-block;
            margin: 1em;
            font-size: 2vw;
            min-width: 20vw;
            text-align: center;
        }

        div.testName,
        div.meterUnit {
            font-size: 1em;
        }

        div.meter {
            font-size: 1.5em;
            line-height: 1.5em;
            height: 2em !important;
        }

        .flash {
            animation: flash 0.6s linear infinite;
        }

        @keyframes flash {
            0% { opacity: 0.6; }
            50% { opacity: 1; }
        }

        a {
            display: inline-block;
            border: 0.15em solid #000000;
            padding: 0.3em 0.5em;
            margin: 0.6em;
            color: #000000;
            text-decoration: none;
        }

        #ip {
            margin: 0.8em 0;
            font-size: 1.2em;
        }

        @media all and (max-width: 50em) {
            div.test {
                font-size: 2em;
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            }
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        }
    </style>
    <script type="text/javascript">
        var w = null
        function runTest() {
            document.getElementById('startBtn').style.display = 'none'
            document.getElementById('testArea').style.display = ''
            document.getElementById('abortBtn').style.display = ''
            w = new Worker('speedtest_worker.min.js')
            var interval = setInterval(function () { w.postMessage('status') }, 100)
            w.onmessage = function (event) {
                var data = event.data.split(';')
                var status = Number(data[0])
                var dl = document.getElementById('download')
                var ul = document.getElementById('upload')
                var ping = document.getElementById('ping')
                var ip = document.getElementById('ip')
                var jitter = document.getElementById('jitter')
                dl.className = status === 1 ? 'flash' : ''
                ping.className = status === 2 ? 'flash' : ''
                jitter.className = ul.className = status === 3 ? 'flash' : ''
                if (status >= 4) {
                    clearInterval(interval)
                    document.getElementById('abortBtn').style.display = 'none'
                    document.getElementById('startBtn').style.display = ''
                    w = null
                }
                if (status === 5) {
                    document.getElementById('testArea').style.display = 'none'
                }
                dl.textContent = data[1]
                ul.textContent = data[2]
                ping.textContent = data[3]
                jitter.textContent = data[5]
                ip.textContent = data[4]
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            }
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            w.postMessage('start')
        }
        function abortTest() {
            if (w) w.postMessage('abort')
        }
    </script>
</head>

<body>
    <h1>Speedtest</h1>
    <div id="testArea" style="display:none">
        <div id="ip">Please wait...</div>
        <div class="test">
            <div class="testName">Download</div>
            <div class="meter">&nbsp;<span id="download"></span>&nbsp;</div>
            <div class="meterUnit">Mbit/s</div>
        </div>
        <div class="test">
            <div class="testName">Upload</div>
            <div class="meter">&nbsp;<span id="upload"></span>&nbsp;</div>
            <div class="meterUnit">Mbit/s</div>
        </div>
        <div class="test">
            <div class="testName">Latency</div>
            <div class="meter">&nbsp;<span id="ping"></span>&nbsp;</div>
            <div class="meterUnit">ms</div>
        </div>
        <div class="test">
            <div class="testName">Jitter</div>
            <div class="meter">&nbsp;<span id="jitter"></span>&nbsp;</div>
            <div class="meterUnit">ms</div>
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        </div>
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        <br/>
        <a href="javascript:abortTest()" id="abortBtn">Abort</a>
    </div>
    <a href="javascript:runTest()" id="startBtn">Run speedtest</a>
</body>
</html>