【前端】js通過canvas獲取瀏覽器的唯一指紋可以當做唯一標識
<!DOCTYPE html>
<html><head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width" /> <title>JS Bin</title> </head> <body> <script src="https://cdn.bootcss.com/blueimp-md5/2.10.0/js/md5.min.js"></script> <script>
var getCanvasFp = function (options) {options = options ? options : {};var result = []// Very simple now, need to make it more complex (geo shapes etc)var canvas = document.createElement('canvas')canvas.width = 2000canvas.height = 200canvas.style.display = 'inline'var ctx = canvas.getContext('2d')// detect browser support of canvas winding// http://blogs.adobe.com/webplatform/2013/01/30/winding-rules-in-canvas/// https://github.com/Modernizr/Modernizr/blob/master/feature-detects/canvas/winding.jsctx.rect(0, 0, 10, 10)ctx.rect(2, 2, 6, 6)result.push('canvas winding:' + ((ctx.isPointInPath(5, 5, 'evenodd') === false) ? 'yes' : 'no'))ctx.textBaseline = 'alphabetic'ctx.fillStyle = '#f60'ctx.fillRect(125, 1, 62, 20)ctx.fillStyle = '#069'// https://github.com/Valve/fingerprintjs2/issues/66if (options.dontUseFakeFontInCanvas) {ctx.font = '11pt Arial'} else {ctx.font = '11pt no-real-font-123'}ctx.fillText('Cwm fjordbank glyphs vext quiz, \ud83d\ude03', 2, 15)ctx.fillStyle = 'rgba(102, 204, 0, 0.2)'ctx.font = '18pt Arial'ctx.fillText('Cwm fjordbank glyphs vext quiz, \ud83d\ude03', 4, 45)// canvas blending// http://blogs.adobe.com/webplatform/2013/01/28/blending-features-in-canvas/// http://jsfiddle.net/NDYV8/16/ctx.globalCompositeOperation = 'multiply'ctx.fillStyle = 'rgb(255,0,255)'ctx.beginPath()ctx.arc(50, 50, 50, 0, Math.PI * 2, true)ctx.closePath()ctx.fill()ctx.fillStyle = 'rgb(0,255,255)'ctx.beginPath()ctx.arc(100, 50, 50, 0, Math.PI * 2, true)ctx.closePath()ctx.fill()ctx.fillStyle = 'rgb(255,255,0)'ctx.beginPath()ctx.arc(75, 100, 50, 0, Math.PI * 2, true)ctx.closePath()ctx.fill()ctx.fillStyle = 'rgb(255,0,255)'// canvas winding// http://blogs.adobe.com/webplatform/2013/01/30/winding-rules-in-canvas/// http://jsfiddle.net/NDYV8/19/ctx.arc(75, 75, 75, 0, Math.PI * 2, true)ctx.arc(75, 75, 25, 0, Math.PI * 2, true)ctx.fill('evenodd')if (canvas.toDataURL) { result.push('canvas fp:' + canvas.toDataURL()) }return result}let fingerPrintRawData = getCanvasFp()[1];
let fingerPrintHash = md5(fingerPrintRawData);
document.write("瀏覽器指紋 ： " + fingerPrintHash);
</script> </body>
</html>
canvas指紋(帆布指紋)_夏天然后的博客-CSDN博客
)
![跳躍游戲[中等]](http://pic.xiahunao.cn/跳躍游戲[中等])
)
