2023-03-07 02:02:36 +08:00
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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2024-06-18 20:49:17 +08:00
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>IPV6 Canvas</title>
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2023-03-07 02:02:36 +08:00
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<style>
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2024-06-18 20:49:17 +08:00
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body {
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background-color: lightslategrey;
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}
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#display {
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margin-right: auto;
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margin-left: auto;
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margin-top: 2em;
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display: block;
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border: black 2px;
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}
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.information {
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& {
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position: absolute;
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left: 0;
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right: 0;
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margin-left: auto;
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margin-right: auto;
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color: white;
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background-color: rgb(100, 100, 200);
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/* Collapsed */
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max-width: 10em;
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top: 0;
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opacity: 84%;
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}
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& > :first-child {
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display: none;
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}
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& > :nth-child(2) {
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display: block;
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}
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}
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.information.active {
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& {
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max-width: 30em;
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top: 1em;
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opacity: 80%;
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padding-left: 0.6em;
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padding-right: 0.6em;
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padding-bottom: 0.6em;
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}
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& > :first-child {
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display: block;
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}
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& > :nth-child(2) {
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display: none;
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}
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}
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.dot {
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height: 25px;
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width: 25px;
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background-color: #ff8200;
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border-radius: 50%;
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display: inline-block;
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vertical-align: middle;
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}
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.text-center {
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text-align: center;
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}
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.text-underline {
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text-decoration: underline;
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}
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</style>
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</head>
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<body>
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<div>
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<div class="information active" id="information">
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<div>
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<h2>IPv6 Canvas</h2>
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<div style="overflow-x: auto">
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<b>ping {{.BaseIP}}XXXX:YYYY:11RR:GGBB</b>
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<br>Substitute coordinates and color, then ping. Values are hexadecimal.
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</div>
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<br>Canvas size: {{.CanvasWidth}}x{{.CanvasHeight}}<br>
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Connection status: <span id="connectionStatus" class="dot"></span>
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<span style="float: right">
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<a class="text-underline" onclick="infoHandler()">Collapse</a>
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</span>
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</div>
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<div class="text-center">
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<a class="text-underline" onclick="infoHandler()">Show information</a>
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</div>
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</div>
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<canvas id="display"></canvas>
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</div>
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</body>
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<script>
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const canvas = document.getElementById("display");
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canvas.width = 1024;
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canvas.height = 1024;
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const ctx = canvas.getContext("2d")
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async function resizeCanvas() {
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let desiredSize = document.documentElement.clientWidth - 20;
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if (desiredSize > 1024) {
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desiredSize = 1024
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}
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canvas.style.width = desiredSize.toString() + "px";
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canvas.style.height = desiredSize.toString() + "px";
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// These properties get reset on resize
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ctx.imageSmoothingEnabled = false;
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ctx.mozImageSmoothingEnabled = false;
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ctx.webkitImageSmoothingEnabled = false;
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}
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window.onresize = resizeCanvas;
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resizeCanvas()
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ctx.fillStyle = "#000000";
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ctx.font = "30px Arial";
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ctx.fillText("Please wait...", 0, 200, 170);
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const evtSource = new EventSource("/stream");
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evtSource.addEventListener("u", (event) => {
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let img = new Image();
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img.src = "data:image/png;base64," + event.data;
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img.onload = function () {
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ctx.drawImage(img, 0, 0, 1024, 1024);
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};
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img.onerror = function (error) {
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console.log("Img Onerror:", error);
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};
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});
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evtSource.onerror = (err) => {
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console.log(err)
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document.getElementById("connectionStatus").style.setProperty("background-color", "#d20000")
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};
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evtSource.onopen = () => {
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document.getElementById("connectionStatus").style.setProperty("background-color", "#00a30e")
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};
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function infoHandler() {
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document.getElementById("information").classList.toggle("active");
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window.scrollTo({top: 0})
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}
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</script>
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</html>
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