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Demo.html
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84 lines (73 loc) · 2.38 KB
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style type="text/css">
#container {
width: max-content;
margin: 0 auto;
height: auto;
text-align: center;
}
/* #myImage {
transform: rotate(270deg);
} */
</style>
</head>
<body>
<div id="container">
<img id="myImage" src="" onclick="imgRotate()">
</div>
</body>
<script>
let myImage = document.getElementById("myImage")
let rotate = 0
let websocket = new WebSocket("ws://192.168.2.129:9001/live")
websocket.binaryType = 'arraybuffer';
websocket.addEventListener('open', function () {
console.log("连接服务成功")
})
websocket.addEventListener('message', function (e) {
var bytes = new Uint8Array(e.data)
var base64Image = 'data:image/jpg;base64,' + encode(bytes)
var img = new Image()
img.src = base64Image
img.onload = function () {
myImage.src = img.src
myImage.width = img.width
}
})
function imgRotate() {
rotate = (rotate + 90) % 360
console.log("rotate = " + rotate)
myImage.style.transform = "rotate(" + rotate + "deg)"
}
// public method for encoding an Uint8Array to base64
function encode(input) {
var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
var output = "";
var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
var i = 0;
while (i < input.length) {
chr1 = input[i++];
chr2 = i < input.length ? input[i++] : Number.NaN; // Not sure if the index
chr3 = i < input.length ? input[i++] : Number.NaN; // checks are needed here
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) {
enc3 = enc4 = 64;
} else if (isNaN(chr3)) {
enc4 = 64;
}
output += keyStr.charAt(enc1) + keyStr.charAt(enc2) +
keyStr.charAt(enc3) + keyStr.charAt(enc4);
}
return output;
}
</script>
</html>