await page.evaluateOnNewDocument(() => {
const mainFunction = HTMLCanvasElement.prototype.toDataURL;
HTMLCanvasElement.prototype.toDataURL = function (type) {
// check if this is a fingerprint attempt
if (type === 'image/png' && this.width === 209 && this.height === 25) {
// return fake fingerprint
return 'data:image/png;base64,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';
}
// otherwise, just use the main function
return mainFunction.apply(this, arguments);
};
因此,您的完整代码应如下所示:
const puppeteer = require('puppeteer');
(async () => {
const browser = await puppeteer.launch({ headless: false });
const page = await browser.newPage();
await page.evaluateOnNewDocument(() => {
const mainFunction = HTMLCanvasElement.prototype.toDataURL;
HTMLCanvasElement.prototype.toDataURL = function (type) {
// check if this is a fingerprint attempt
if (type === 'image/png' && this.width === 209 && this.height === 25) {
// return fake fingerprint
return 'data:image/png;base64,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';
}
// otherwise, just use the main function
return mainFunction.apply(this, arguments);
};
});
await page.goto('https://browserleaks.com/canvas');
})();