{"id":10224,"date":"2021-11-19T10:41:57","date_gmt":"2021-11-19T02:41:57","guid":{"rendered":"https:\/\/www.lalimao.com\/?p=3123"},"modified":"2021-11-19T10:41:57","modified_gmt":"2021-11-19T02:41:57","slug":"%e6%b5%8f%e8%a7%88%e5%99%a8%e6%8c%87%e7%ba%b9%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f%e5%a6%82%e4%bd%95%e9%98%b2%e6%ad%a2%e8%a2%ab%e7%94%9f%e6%88%90%e6%b5%8f%e8%a7%88%e5%99%a8%e6%8c%87%e7%ba%b9%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.lalimao.com\/news\/10224.html","title":{"rendered":"\u6d4f\u89c8\u5668\u6307\u7eb9\u662f\u4ec0\u4e48\uff1f\u5982\u4f55\u9632\u6b62\u88ab\u751f\u6210\u6d4f\u89c8\u5668\u6307\u7eb9\uff1f"},"content":{"rendered":"\n<h6 class=\"wp-block-heading\">\u4ec0\u4e48\u662f\u6d4f\u89c8\u5668\u6307\u7eb9<\/h6>\n\n\n\n<p>\u6d4f\u89c8\u5668\u6307\u7eb9\u53ef\u4ee5\u901a\u8fc7\u6d4f\u89c8\u5668\u5bf9\u7f51\u7ad9\u53ef\u89c1\u7684\u914d\u7f6e\u3001\u8bbe\u7f6e\u4fe1\u606f\uff0c\u6765\u8ddf\u8e2a Web 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header\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{  \"headers\": {    \n    \"Accept\": \"text\/html,application\/xhtml+xml,application\/xml;q=0.9,image\/webp,image\/apng,*\/*;q=0.8,application\/signed-exchange;v=b3\",     \n    \"Accept-Encoding\": \"gzip, deflate, br\",     \n    \"Accept-Language\": \"zh-CN,zh;q=0.9,en;q=0.8\",     \n    \"Host\": \"httpbin.org\",     \n    \"Sec-Fetch-Mode\": \"navigate\",     \n    \"Sec-Fetch-Site\": \"none\",     \n    \"Sec-Fetch-User\": \"?1\",     \n    \"Upgrade-Insecure-Requests\": \"1\",     \n    \"User-Agent\": \"Mozilla\/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/77.0.3865.90 Safari\/537.36\"\n  }}<\/code><\/pre>\n\n\n\n<p>\u9664\u4e86 http \u4e2d\u62ff\u5230\u7684\u6307\u7eb9\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u6765\u83b7\u5f97\u6d4f\u89c8\u5668\u7684\u7279\u5f81\u4fe1\u606f\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u6bcf\u4e2a\u6d4f\u89c8\u5668\u7684UA<\/li><li>\u6d4f\u89c8\u5668\u53d1\u9001\u7684 HTTP ACCEPT \u6807\u5934<\/li><li>\u6d4f\u89c8\u5668\u4e2d\u5b89\u88c5\u7684\u6d4f\u89c8\u5668\u6269\u5c55\/\u63d2\u4ef6\uff0c\u4f8b\u5982 Quicktime\uff0cFlash\uff0cJava \u6216 Acrobat\uff0c\u4ee5\u53ca\u8fd9\u4e9b\u63d2\u4ef6\u7684\u7248\u672c<\/li><li>\u8ba1\u7b97\u673a\u4e0a\u5b89\u88c5\u7684\u5b57\u4f53\u3002<\/li><li>\u6d4f\u89c8\u5668\u662f\u5426\u6267\u884c JavaScript \u811a\u672c<\/li><li>\u6d4f\u89c8\u5668\u662f\u5426\u80fd\u79cd\u4e0b\u5404\u79cd cookie \u548c \u201csuper cookies\u201d<\/li><li>\u662f\u5426\u6d4f\u89c8\u5668\u8bbe\u7f6e\u4e3a\u201cDo Not Track\u201d<\/li><li>\u7cfb\u7edf\u5e73\u53f0\uff08\u4f8b\u5982 Win32\u3001Linux x86\uff09<\/li><li>\u7cfb\u7edf\u8bed\u8a00\uff08\u4f8b\u5982 cn\u3001en-US\uff09<\/li><li>\u6d4f\u89c8\u5668\u662f\u5426\u652f\u6301\u89e6\u6478\u5c4f<\/li><\/ul>\n\n\n\n<p>\u62ff\u5230\u8fd9\u4e9b\u503c\u540e\u53ef\u4ee5\u8fdb\u884c\u4e00\u4e9b\u8fd0\u7b97\uff0c\u5f97\u5230\u6d4f\u89c8\u5668\u6307\u7eb9\u5177\u4f53\u7684\u4fe1\u606f\u71b5\u4ee5\u53ca\u6d4f\u89c8\u5668\u7684 uuid\u3002<\/p>\n\n\n\n<p>\u8fd9\u4e9b\u4fe1\u606f\u5c31\u7c7b\u4f3c\u4eba\u7c7b\u7684\u4f53\u91cd\u3001\u8eab\u9ad8\u3001\u80a4\u8272\u4e00\u6837\uff0c\u6709\u5f88\u5927\u7684\u91cd\u590d\u6982\u7387\uff0c\u53ea\u80fd\u4f5c\u4e3a\u8f85\u52a9\u8bc6\u522b\uff0c\u6240\u4ee5\u6211\u4eec\u9700\u8981\u66f4\u7cbe\u786e\u7684\u6307\u7eb9\u6765\u5224\u65ad\u552f\u4e00\u6027\u3002<\/p>\n\n\n\n<p><strong>\u9ad8\u7ea7\u6307\u7eb9<\/strong><\/p>\n\n\n\n<p>\u666e\u901a\u6307\u7eb9\u662f\u4e0d\u591f\u533a\u5206\u72ec\u7279\u7684\u4e2a\u4eba\uff0c\u8fd9\u65f6\u5c31\u9700\u8981\u9ad8\u7ea7\u6307\u7eb9\uff0c\u5c06\u8303\u56f4\u8fdb\u4e00\u6b65\u7f29\u5c0f\uff0c\u751a\u81f3\u751f\u6210\u4e00\u4e2a\u72ec\u4e00\u65e0\u4e8c\u7684\u8de8\u6d4f\u89c8\u5668\u8eab\u4efd\u3002<\/p>\n\n\n\n<p>\u7528\u4e8e\u751f\u4ea7\u6307\u7eb9\u7684\u5404\u4e2a\u4fe1\u606f\uff0c\u6709\u6743\u91cd\u5927\u5c0f\u4e4b\u5206\uff0c\u4fe1\u606f\u71b5\u5927\u7684\u5c06\u62e5\u6709\u8f83\u5927\u7684\u6743\u91cd\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.lalimao.com\/wp-content\/uploads\/2021\/11\/image-13.png\" alt=\"\" class=\"wp-image-3124\"\/><\/figure>\n\n\n\n<p>\u5404\u4fe1\u606f\u7279\u5f81\u6743\u91cd\u503c<\/p>\n\n\n\n<p>\u5728\u8bba\u6587\u300aCross-Browser Fingerprinting via OS and Hardware Level Features [http:\/\/yinzhicao.org\/Tracking&#8230;]\u300b\u4e2d\u66f4\u662f\u8be6\u7ec6\u7814\u7a76\u4e86\u5404\u4e2a\u6307\u6807\u7684\u4fe1\u606f\u71b5\u548c\u7a33\u5b9a\u6027\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.lalimao.com\/wp-content\/uploads\/2021\/11\/image-14.png\" alt=\"\" class=\"wp-image-3125\"\/><\/figure>\n\n\n\n<p>\u4ece\u8be5\u8bba\u6587\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c<strong>\u65f6\u533a\u3001\u5c4f\u5e55\u5206\u8fa8\u7387\u548c\u8272\u6df1\u3001Canvas\u3001webGL<\/strong> \u7684\u4fe1\u606f\u71b5\u5728\u8de8\u6d4f\u89c8\u5668\u6307\u7eb9\u4e0a\u7684\u6743\u91cd\u662f\u6bd4\u8f83\u5927\u7684\u3002\u4e0b\u9762\u6211\u4eec\u5c31\u6765\u770b\u770b\u8fd9\u4e9b\u9ad8\u7ea7\u6307\u7eb9\u90fd\u5305\u542b\u4e86\u4e9b\u4ec0\u4e48\u4fe1\u606f\u3002<\/p>\n\n\n\n<p><strong>Canvas \u6307\u7eb9<\/strong><\/p>\n\n\n\n<p>Canvas \u662f HTML5 \u4e2d\u7684\u52a8\u6001\u7ed8\u56fe\u6807\u7b7e\uff0c\u4e5f\u53ef\u4ee5\u7528\u5b83\u751f\u6210\u56fe\u7247\u6216\u8005\u5904\u7406\u56fe\u7247\u3002\u5373\u4fbf\u4f7f\u7528 Canvas \u7ed8\u5236\u76f8\u540c\u7684\u5143\u7d20\uff0c\u4f46\u662f\u7531\u4e8e\u7cfb\u7edf\u7684\u5dee\u522b\uff0c\u5b57\u4f53\u6e32\u67d3\u5f15\u64ce\u4e0d\u540c\uff0c\u5bf9\u6297\u952f\u9f7f\u3001\u6b21\u50cf\u7d20\u6e32\u67d3\u7b49\u7b97\u6cd5\u4e5f\u4e0d\u540c\uff0cCanvas \u5c06\u540c\u6837\u7684\u6587\u5b57\u8f6c\u6210\u56fe\u7247\uff0c\u5f97\u5230\u7684\u7ed3\u679c\u4e5f\u662f\u4e0d\u540c\u7684\u3002<\/p>\n\n\n\n<p>\u5b9e\u73b0\u4ee3\u7801\u5927\u81f4\u4e3a\uff1a\u5728\u753b\u5e03\u4e0a\u6e32\u67d3\u4e00\u4e9b\u6587\u5b57\uff0c\u518d\u7528 toDataURL \u8f6c\u6362\u51fa\u6765\uff0c\u5373\u4fbf\u5f00\u542f\u4e86\u9690\u79c1\u6a21\u5f0f\u4e00\u6837\u53ef\u4ee5\u62ff\u5230\u76f8\u540c\u7684\u503c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>function getCanvasFingerprint () {    \n    var canvas = document.createElement('canvas');    \n    var context = canvas.getContext(\"2d\");    \n    context.font = \"18pt Arial\";    \n    context.textBaseline = \"top\";    \n    context.fillText(\"Hello, user.\", 2, 2);    \n    return canvas.toDataURL(\"image\/jpeg\");\n}\ngetCanvasFingerprint()<\/code><\/pre>\n\n\n\n<p>\u6d41\u7a0b\u5f88\u7b80\u5355\uff0c\u6e32\u67d3\u6587\u5b57\uff0ctoDataURL \u662f\u5c06\u6574\u4e2a Canvas \u7684\u5185\u5bb9\u5bfc\u51fa\uff0c\u5f97\u5230\u503c\u3002<\/p>\n\n\n\n<p><strong>WebGL \u6307\u7eb9<\/strong><\/p>\n\n\n\n<p>WebGL\uff08Web\u56fe\u5f62\u5e93\uff09\u662f\u4e00\u4e2a JavaScript API\uff0c\u53ef\u5728\u4efb\u4f55\u517c\u5bb9\u7684 Web \u6d4f\u89c8\u5668\u4e2d\u6e32\u67d3\u9ad8\u6027\u80fd\u7684\u4ea4\u4e92\u5f0f 3D \u548c 2D \u56fe\u5f62\uff0c\u800c\u65e0\u9700\u4f7f\u7528\u63d2\u4ef6\u3002WebGL \u901a\u8fc7\u5f15\u5165\u4e00\u4e2a\u4e0e OpenGL ES 2.0 \u975e\u5e38\u4e00\u81f4\u7684 API \u6765\u505a\u5230\u8fd9\u4e00\u70b9\uff0c\u8be5 API \u53ef\u4ee5\u5728 HTML5 \u5143\u7d20\u4e2d\u4f7f\u7528\u3002\u8fd9\u79cd\u4e00\u81f4\u6027\u4f7f API \u53ef\u4ee5\u5229\u7528\u7528\u6237\u8bbe\u5907\u63d0\u4f9b\u7684\u786c\u4ef6\u56fe\u5f62\u52a0\u901f\u3002\u7f51\u7ad9\u53ef\u4ee5\u5229\u7528 WebGL \u6765\u8bc6\u522b\u8bbe\u5907\u6307\u7eb9\uff0c\u4e00\u822c\u53ef\u4ee5\u7528\u4e24\u79cd\u65b9\u5f0f\u6765\u505a\u5230\u6307\u7eb9\u751f\u4ea7\uff1a<\/p>\n\n\n\n<p>WebGL \u62a5\u544a\u2014\u2014\u5b8c\u6574\u7684 WebGL \u6d4f\u89c8\u5668\u62a5\u544a\u8868\u662f\u53ef\u83b7\u53d6\u3001\u53ef\u88ab\u68c0\u6d4b\u7684\u3002\u5728\u4e00\u4e9b\u60c5\u51b5\u4e0b\uff0c\u5b83\u4f1a\u88ab\u8f6c\u6362\u6210\u4e3a\u54c8\u5e0c\u503c\u4ee5\u4fbf\u66f4\u5feb\u5730\u8fdb\u884c\u5206\u6790\u3002<\/p>\n\n\n\n<p>WebGL \u56fe\u50cf \u2014\u2014\u6e32\u67d3\u548c\u8f6c\u6362\u4e3a\u54c8\u5e0c\u503c\u7684\u9690\u85cf 3D \u56fe\u50cf\u3002\u7531\u4e8e\u6700\u7ec8\u7ed3\u679c\u53d6\u51b3\u4e8e\u8fdb\u884c\u8ba1\u7b97\u7684\u786c\u4ef6\u8bbe\u5907\uff0c\u56e0\u6b64\u6b64\u65b9\u6cd5\u4f1a\u4e3a\u8bbe\u5907\u53ca\u5176\u9a71\u52a8\u7a0b\u5e8f\u7684\u4e0d\u540c\u7ec4\u5408\u751f\u6210\u552f\u4e00\u503c\u3002\u8fd9\u79cd\u65b9\u5f0f\u4e3a\u4e0d\u540c\u7684\u8bbe\u5907\u7ec4\u5408\u548c\u9a71\u52a8\u7a0b\u5e8f\u751f\u6210\u4e86\u552f\u4e00\u503c\u3002<\/p>\n\n\n\n<p>\u53ef\u4ee5\u901a\u8fc7 Browserleaks test \u68c0\u6d4b\u7f51\u7ad9\u6765\u67e5\u770b\u7f51\u7ad9\u53ef\u4ee5\u901a\u8fc7\u8be5 API \u83b7\u53d6\u54ea\u4e9b\u4fe1\u606f\u3002<\/p>\n\n\n\n<p>\u4ea7\u751fWebGL\u6307\u7eb9\u539f\u7406\u662f\u9996\u5148\u9700\u8981\u7528\u7740\u8272\u5668\uff08shaders\uff09\u7ed8\u5236\u4e00\u4e2a\u68af\u5ea6\u5bf9\u8c61\uff0c\u5e76\u5c06\u8fd9\u4e2a\u56fe\u7247\u8f6c\u6362\u4e3aBase64\u5b57\u7b26\u4e32\u3002\u7136\u540e\u679a\u4e3eWebGL\u6240\u6709\u7684\u62d3\u5c55\u548c\u529f\u80fd\uff0c\u5e76\u5c06\u4ed6\u4eec\u6dfb\u52a0\u5230Base64\u5b57\u7b26\u4e32\u4e0a\uff0c\u4ece\u800c\u4ea7\u751f\u4e00\u4e2a\u5de8\u5927\u7684\u5b57\u7b26\u4e32\uff0c\u8fd9\u4e2a\u5b57\u7b26\u4e32\u5728\u6bcf\u53f0\u8bbe\u5907\u4e0a\u53ef\u80fd\u662f\u975e\u5e38\u72ec\u7279\u7684\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982fingerprint2js\u5e93\u7684 WebGL \u6307\u7eb9\u751f\u4ea7\u65b9\u5f0f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u90e8\u5206\u4ee3\u7801 \ngl = getWebglCanvas()    \nif (!gl) { return null }    \nvar result = &#91;]    \nvar vShaderTemplate = 'attribute vec2 attrVertex;varying vec2 varyinTexCoordinate;uniform vec2 uniformOffset;void main(){varyinTexCoordinate=attrVertex+uniformOffset;gl_Position=vec4(attrVertex,0,1);}'\nvar fShaderTemplate = 'precision mediump float;varying vec2 varyinTexCoordinate;void main() {gl_FragColor=vec4(varyinTexCoordinate,0,1);}'\nvar vertexPosBuffer = gl.createBuffer()    \ngl.bindBuffer(gl.ARRAY_BUFFER, vertexPosBuffer)    \nvar vertices = new Float32Array(&#91;-0.2, -0.9, 0, 0.4, -0.26, 0, 0, 0.732134444, 0])\n\/\/ \u521b\u5efa\u5e76\u521d\u59cb\u5316\u4e86Buffer\u5bf9\u8c61\u7684\u6570\u636e\u5b58\u50a8\u533a\u3002\ngl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW) \nvertexPosBuffer.itemSize = 3\nvertexPosBuffer.numItems = 3\n\/\/ \u521b\u5efa\u548c\u521d\u59cb\u5316\u4e00\u4e2aWebGLProgram\u5bf9\u8c61\u3002\nvar program = gl.createProgram()\n\/\/ \u521b\u5efa\u7740\u8272\u5668\u5bf9\u8c61\nvar vshader = gl.createShader(gl.VERTEX_SHADER)\n\/\/ \u4e0b\u4e24\u884c\u914d\u7f6e\u7740\u8272\u5668 \ngl.shaderSource(vshader, vShaderTemplate)  \/\/ \u8bbe\u7f6e\u7740\u8272\u5668\u4ee3\u7801 \ngl.compileShader(vshader) \/\/ \u7f16\u8bd1\u4e00\u4e2a\u7740\u8272\u5668\uff0c\u4ee5\u4fbf\u88abWebGLProgram\u5bf9\u8c61\u6240\u4f7f\u7528\n\nvar fshader = gl.createShader(gl.FRAGMENT_SHADER)   \ngl.shaderSource(fshader, fShaderTemplate)    \ngl.compileShader(fshader)    \n\/\/ \u6dfb\u52a0\u9884\u5148\u5b9a\u4e49\u597d\u7684\u9876\u70b9\u7740\u8272\u5668\u548c\u7247\u6bb5\u7740\u8272\u5668 \ngl.attachShader(program, vshader)\ngl.attachShader(program, fshader) \n\/\/ \u94fe\u63a5WebGLProgram\u5bf9\u8c61 \ngl.linkProgram(program)\n\/\/ \u5b9a\u4e49\u597d\u7684WebGLProgram\u5bf9\u8c61\u6dfb\u52a0\u5230\u5f53\u524d\u7684\u6e32\u67d3\u72b6\u6001 \ngl.useProgram(program)    \nprogram.vertexPosAttrib = gl.getAttribLocation(program, 'attrVertex')    \nprogram.offsetUniform = gl.getUniformLocation(program, 'uniformOffset')                           gl.enableVertexAttribArray(program.vertexPosArray)    \ngl.vertexAttribPointer(program.vertexPosAttrib, vertexPosBuffer.itemSize, gl.FLOAT, !1, 0, 0)    \ngl.uniform2f(program.offsetUniform, 1, 1)\n\/\/ \u4ece\u5411\u91cf\u6570\u7ec4\u4e2d\u7ed8\u5236\u56fe\u5143 \ngl.drawArrays(gl.TRIANGLE_STRIP, 0, vertexPosBuffer.numItems)    \ntry {        \n    result.push(gl.canvas.toDataURL())    \n} catch (e) {        \n    \/* .toDataURL may be absent or broken (blocked by extension) *\/\n}<\/code><\/pre>\n\n\n\n<h6 class=\"wp-block-heading\">\u5982\u4f55\u9632\u6b62\u88ab\u751f\u6210\u201c\u7528\u6237\u6307\u7eb9\u201d<\/h6>\n\n\n\n<p>\u6587\u7ae0\u5f00\u5934\u4e5f\u63d0\u5230\u4e86\uff0c\u5f88\u591a\u4eba\u5bf9\u6d4f\u89c8\u5668\u8fd9\u9879\u6280\u672f\u662f\u53c8\u7231\u53c8\u6068\u3002\u56e0\u4e3a\u4e00\u5927\u5806\u7f51\u7ad9\u4f7f\u7528\u5404\u79cd\u6280\u672f\u6765\u201c\u751f\u6210\u201d\u7528\u6237\u6307\u7eb9\uff0c\u4ee5\u4fbf\u7ed9\u7f51\u7ad9\u7528\u6237\u5e26\u6765\u66f4\u7cbe\u51c6\u7684\u63a8\u8350\u548c\u7b26\u5408\u7528\u6237\u7684\u6d4f\u89c8\u4e60\u60ef\u3002\u800c\u7528\u6237\u5728\u4eab\u53d7\u6280\u672f\u5e26\u6765\u4fbf\u5229\u7684\u540c\u65f6\uff0c\u4e5f\u4e0d\u514d\u4f1a\u6709\u201c\u9690\u79c1\u6cc4\u9732\u201d\u7684\u7126\u8e81\u548c\u4e0d\u5b89\u611f\u3002<strong>\u90a3\u4e48\u6211\u4eec\u5982\u4f55\u9632\u6b62\u88ab\u751f\u6210\u201c\u7528\u6237\u6307\u7eb9\u201d\u5462\uff1f<\/strong><\/p>\n\n\n\n<p><strong>\u6df7\u6dc6 Canvas \u6307\u7eb9<\/strong><\/p>\n\n\n\n<p>\u6211\u4eec\u5df2\u7ecf\u4e86\u89e3\u4e86\u662f\u5982\u4f55\u83b7\u53d6 canvas \u6307\u7eb9\u7684\uff0c\u90a3\u4e48\u5e94\u8be5\u5982\u4f55\u9632\u8303\u88ab\u6076\u610f\u83b7\u53d6\u5462\uff1f\u60f3\u6df7\u6dc6 Canvas \u6307\u7eb9\uff0c\u53ea\u9700\u8981\u5728 toDataURL \u5f97\u5230\u7684\u7ed3\u679c\u4e0a\u505a\u624b\u811a\u5c31\u53ef\u4ee5\u3002<\/p>\n\n\n\n<p><strong>toDataURL()<\/strong> \u5c06\u6574\u4e2acanvas\u7684\u5185\u5bb9\u5bfc\u51fa\uff0c\u6211\u4eec\u9700\u8981\u5c06 Canvas \u4e2d\u7684\u90e8\u5206\u5185\u5bb9\u4fee\u6539\uff0c\u8fd9\u4e2a\u65f6\u5019\u53ef\u4ee5\u901a\u8fc7 <strong>getImageData()<\/strong> \u590d\u5236\u753b\u5e03\u4e0a\u6307\u5b9a\u77e9\u5f62\u7684\u50cf\u7d20\u6570\u636e\uff0c\u7136\u540e\u901a\u8fc7 <strong>putImageData()<\/strong>\u5c06\u56fe\u50cf\u6570\u636e\u653e\u56de\uff0c\u7136\u540e\u518d\u4f7f\u7528 <strong>toDataURL()<\/strong> \u5bfc\u51fa\u7684\u56fe\u7247\u5c31\u6709\u4e86\u5dee\u5f02\u3002<\/p>\n\n\n\n<p><strong>CanvasRenderingContext2D.getImageData()<\/strong> \u8fd4\u56de\u4e00\u4e2aImageData\u5bf9\u8c61\uff0c\u7528\u6765\u63cf\u8ff0 Canvas \u533a\u57df\u9690\u542b\u7684\u50cf\u7d20\u6570\u636e\u3002\u8fd9\u4e2a\u533a\u57df\u901a\u8fc7\u77e9\u5f62\u8868\u793a\uff0c\u8d77\u59cb\u70b9\u4e3a(sx, sy)\u3001\u5bbd\u4e3asw\u3001\u9ad8\u4e3ash\u3002<\/p>\n\n\n\n<p>ImageData \u63a5\u53e3\u63cf\u8ff0\u4e86&lt;Canvas&gt;\u5143\u7d20\u7684\u4e00\u4e2a\u9690\u542b\u50cf\u7d20\u6570\u636e\u7684\u533a\u57df\uff0c\u53ef\u4ee5\u7531 ImageData() \u65b9\u6cd5\u6784\u9020\uff0c\u6216\u8005\u7531canvas \u5728\u4e00\u8d77\u7684 CanvasRenderingContext2D \u5bf9\u8c61\u7684\u521b\u5efa\u65b9\u6cd5\uff1acreateImageData() \u548c getImageData()\u3002<\/p>\n\n\n\n<p>ImageData \u5bf9\u8c61\u5b58\u50a8\u7740canvas\u5bf9\u8c61\u771f\u5b9e\u7684\u50cf\u7d20\u6570\u636e\uff0c\u5b83\u5305\u542b\u51e0\u4e2a\u53ea\u8bfb\u5c5e\u6027\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>width \u56fe\u7247\u5bbd\u5ea6\uff0c\u5355\u4f4d\u50cf\u7d20<\/li><li>height \u56fe\u7247\u9ad8\u5ea6\uff0c\u5355\u4f4d\u50cf\u7d20<\/li><li>data<\/li><\/ul>\n\n\n\n<p>Uint8ClampedArray \u7c7b\u578b\u7684\u4e00\u4f4d\u6570\u7ec4\uff0c\u5305\u542b\u7740 RGBA \u7684\u6574\u578b\u6570\u636e\uff0c\u8303\u56f4\u5728 0~255\u3002\u5b83\u53ef\u4ee5\u89c6\u4f5c\u521d\u59cb\u50cf\u7d20\u6570\u636e\uff0c\u6bcf\u4e2a\u50cf\u7d20\u7528 4 \u4e2a 1 bytes \u503c\uff08\u6309\u7167 red\u3001green\u3001blue\u3001alpha \u7684\u987a\u5e8f\uff09\uff0c\u6bcf\u4e2a\u989c\u8272\u503c\u75280~255 \u4e2d\u7684\u6570\u5b57\u4ee3\u8868\u3002\u6bcf\u4e2a\u90e8\u5206\u88ab\u5206\u914d\u5230\u4e00\u4e2a\u6570\u7ec4\u5185\u7684\u8fde\u7eed\u7d22\u5f15\uff0c\u5de6\u4e0a\u89d2\u7b2c\u4e00\u4e2a\u50cf\u7d20\u7684\u7ea2\u8272\u90e8\u5206\uff0c\u4f4d\u4e8e\u6570\u7ec4\u7d22\u5f15\u7684\u7b2c 0 \u4f4d\u3002\u50cf\u7d20\u4ece\u5de6\u5230\u53f3\u4ece\u4e0a\u5230\u4e0b\u88ab\u5904\u7406\uff0c\u904d\u5386\u6574\u4e2a\u6570\u7ec4\u3002<\/p>\n\n\n\n<p>Unit8ClampedArray \u5305\u542b \u9ad8\u5ea6<em>\u5bbd\u5ea6<\/em>4 bytes\u6570\u636e\uff0c\u7d22\u5f15\u503c\u4ece 0 ~ (w<em>h<\/em>4)-1 \u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u8bfb\u53d6\u56fe\u7247\u4e2d\u4f4d\u4e8e\u7b2c 50 \u884c\uff0c200 \u5217\u7684\u50cf\u7d20\u7684\u84dd\u8272\u90e8\u5206\uff0c\u5219\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const blueComponent = imageData&#91;50*(imageData.width * 4) + 200*4 + 2]<\/code><\/pre>\n\n\n\n<p>\u4e0b\u9762\u662f\u5b9e\u73b0\u6df7\u6dc6 Canvas \u6307\u7eb9\u7684\u65b9\u6cd5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const toBlob = HTMLCanvasElement.prototype.toBlob;\nconst toDataURL = HTMLCanvasElement.prototype.toDataURL;\nHTMLCanvasElement.prototype.manipulate = function() {\n  const {width, height} = this;\n  \/\/ \u62ff\u5230\u5728\u8fdb\u884ctoDataURL\u6216\u8005toBlob\u524d\u7684canvas\u6240\u751f\u6210\u7684CanvasRenderingContext2D\n  const context = this.getContext('2d'); \n  const shift = {\n    'r': Math.floor(Math.random() * 10) - 5,\n    'g': Math.floor(Math.random() * 10) - 5,\n    'b': Math.floor(Math.random() * 10) - 5\n  };\n  const matt = context.getImageData(0, 0, width, height);\n  \/\/ \u5bf9getImageData\u751f\u6210\u7684imageData\uff08\u50cf\u7d20\u6e90\u6570\u636e\uff09\u4e2d\u7684\u6bcf\u4e00\u4e2a\u50cf\u7d20\u7684r\u3001g\u3001b\u90e8\u5206\u7684\u503c\u8fdb\u884c\u8fdb\u884c\u968f\u673a\u6539\u53d8\u4ece\u800c\u751f\u6210\u552f\u4e00\u7684\u56fe\u50cf\u3002\n  for (let i = 0; i &lt; height; i += Math.max(1, parseInt(height \/ 10))) {\n    for (let j = 0; j &lt; width; j += Math.max(1, parseInt(width \/ 10))) {\n      const n = ((i * (width * 4)) + (j * 4));\n      matt.data&#91;n + 0] = matt.data&#91;n + 0] + shift.r; \/\/ \u52a0\u4e0a\u968f\u673a\u6270\u52a8\n      matt.data&#91;n + 1] = matt.data&#91;n + 1] + shift.g;\n      matt.data&#91;n + 2] = matt.data&#91;n + 2] + shift.b;\n    }\n  }\n  context.putImageData(matt, 0, 0); \/\/ \u91cd\u65b0\u653e\u56de\u53bb\n\/\/ \u4fee\u6539prototype.toBlob\nObject.defineProperty(HTMLCanvasElement.prototype, 'toBlob', {\n  value: function() {\n    if (script.dataset.active === 'true') {\n      try {\n        this.manipulate(); \/\/ \u5728\u6bcf\u6b21toBlob\u524d\uff0c\u5148\u6df7\u6dc6\u4e0bImageData\n      }\n      catch(e) {\n        console.warn('manipulation failed', e);\n      }\n    }\n    return toBlob.apply(this, arguments);\n  }\n});\n\/\/ \u4fee\u6539prototype. toDataURL\nObject.defineProperty(HTMLCanvasElement.prototype, 'toDataURL', {\n  value: function() {\n    if (script.dataset.active === 'true') {\n      try {\n        this.manipulate(); \/\/ \u5728\u6bcf\u6b21toDataURL\u524d\uff0c\u5148\u6df7\u6dc6\u4e0bImageData\n      }\n      catch(e) {\n        console.warn('manipulation failed', e);\n      }\n    }\n    return toDataURL.apply(this, arguments);\n  }\n});<\/code><\/pre>\n\n\n\n<p><strong>\u6df7\u6dc6\u5176\u4ed6\u6307\u7eb9<\/strong><\/p>\n\n\n\n<p>\u4e0e\u524d\u9762\u6df7\u6dc6canvas\u6307\u7eb9\u6df7\u6dc6\u7684\u601d\u8def\u662f\u4e00\u81f4\u7684\uff0c\u90fd\u662f\u66f4\u6539\u88ab\u83b7\u53d6\u5bf9\u8c61\u7684\u539f\u578b\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p>\u6bd4\u5982\u6df7\u6dc6\u65f6\u533a\uff0c\u5c31\u662f\u66f4\u6539 Date.prototype.getTimezoneOffset \u7684\u8fd4\u56de\u503c\u3002<\/p>\n\n\n\n<p>\u6df7\u6dc6\u5206\u8fa8\u7387\u5219\u662f\u66f4\u6539documentElement.clientHeight documentElement.clientWidth<\/p>\n\n\n\n<p>\u6df7\u6dc6 WebGL \u5219\u8981\u66f4\u6539 WebGLbufferData getParameter\u65b9\u6cd5\u7b49\u7b49\u3002<\/p>\n\n\n\n<p>\u5f53\u7136\uff0c\u6211\u4eec\u4e5f\u6709\u4e00\u4e9b\u7b80\u5355\u7684\u65b9\u6cd5\u6765\u9632\u6b62\u88ab\u751f\u6210\u7528\u6237\u6307\u7eb9\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e9b\u6307\u7eb9\u6d4f\u89c8\u5668\uff08\u62c9\u529b\u732b<strong><a rel=\"noreferrer noopener\" href=\"https:\/\/www.lalimao.com\/\" target=\"_blank\">\u6307\u7eb9\u6d4f\u89c8\u5668<\/a><\/strong>\uff09\u6765\u5b9e\u73b0\u8fd9\u4e2a\u529f\u80fd\u3002\u62c9\u529b\u732b<strong>\u6307\u7eb9<a href=\"https:\/\/www.lalimao.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u9632\u5173\u8054\u6d4f\u89c8\u5668<\/a><\/strong>\u53ef\u4ee5\u968f\u673a\u751f\u6210\u6216\u7528\u6237\u81ea\u5b9a\u4e49\u751f\u6210\u4e00\u4e2a\u65b0\u7684\u6d4f\u89c8\u5668\u6307\u7eb9\uff0c\u4ece\u800c\u63a9\u76d6\u771f\u5b9e\u7684\u6d4f\u89c8\u5668\u6307\u7eb9\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.lalimao.com\/wp-content\/uploads\/2021\/11\/\u62c9\u529b\u732b\u6307\u7eb9\u6d4f\u89c8\u5668\u591a\u8d26\u53f7\u9632\u5173\u8054.jpg\" alt=\"\" class=\"wp-image-2189\"\/><\/figure>\n\n\n\n<p>\u901a\u8fc7\u6a21\u62df\u7535\u8111\u6216\u624b\u673a\u8bbe\u5907\u7684\u8f6f\u786c\u4ef6\u6307\u7eb9\u4fe1\u606f\uff0c\u4f7f\u5f97\u6bcf\u4e2a\u6d4f\u89c8\u5668\u6587\u4ef6\u7684Cookies\u3001\u672c\u5730\u5b58\u50a8\u7b49\u5c06\u88ab\u5b8c\u5168\u9694\u79bb\uff0c\u9632\u6b62\u56e0\u6d4f\u89c8\u5668\u6307\u7eb9\u76f8\u540c\u800c\u7f51\u7edc\u8d26\u53f7\u51fa\u73b0\u5173\u8054\u60c5\u51b5\u3002<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ec0\u4e48\u662f\u6d4f\u89c8\u5668\u6307\u7eb9 \u6d4f\u89c8\u5668\u6307\u7eb9\u53ef\u4ee5\u901a\u8fc7\u6d4f\u89c8\u5668\u5bf9\u7f51\u7ad9\u53ef\u89c1\u7684\u914d\u7f6e\u3001\u8bbe\u7f6e\u4fe1\u606f\uff0c\u6765\u8ddf\u8e2a Web \u6d4f\u89c8\u5668\uff0c\u5b83\u5c31\u50cf\u6211\u4eec\u4eba\u624b\u4e0a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1951,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[68],"tags":[69,10,71],"class_list":["post-10224","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-lalimao-browser","tag-fingerprint-browser","tag-cross-border-e-commerce-browser"],"_links":{"self":[{"href":"https:\/\/www.lalimao.com\/news\/wp-json\/wp\/v2\/posts\/10224","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lalimao.com\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lalimao.com\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lalimao.com\/news\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lalimao.com\/news\/wp-json\/wp\/v2\/comments?post=10224"}],"version-history":[{"count":0,"href":"https:\/\/www.lalimao.com\/news\/wp-json\/wp\/v2\/posts\/10224\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lalimao.com\/news\/wp-json\/"}],"wp:attachment":[{"href":"https:\/\/www.lalimao.com\/news\/wp-json\/wp\/v2\/media?parent=10224"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lalimao.com\/news\/wp-json\/wp\/v2\/categories?post=10224"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lalimao.com\/news\/wp-json\/wp\/v2\/tags?post=10224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}