node.js - 使用 xvfb headless : false 运行 Puppeteer

Question

我在 headless Ubuntu 16.04 AWS EC2 实例中运行 Puppeteer，并希望通过 xfvb 使用虚拟显示器运行它。每当我尝试运行它时，我都会继续收到错误消息:

/home/ubuntu/node_modules/xvfb/index.js:84
throw new Error('Could not start Xvfb.');    
Error: Could not start Xvfb.
at Xvfb.startSync (/home/ubuntu/node_modules/xvfb/index.js:84:17)
at Object.<anonymous> (/home/ubuntu/puppeteer-works.js:39:6)
at Module._compile (internal/modules/cjs/loader.js:689:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
at Module.load (internal/modules/cjs/loader.js:599:32)
at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
at Function.Module._load (internal/modules/cjs/loader.js:530:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:742:12)
at startup (internal/bootstrap/node.js:266:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:596:3)

我的代码如下:

const puppeteer = require('puppeteer');
const fs = require("fs");
const Xvfb = require('xvfb');
var xvfb = new Xvfb();

var text = fs.readFileSync("proxy.txt").toString('utf-8');
const textByLine = text.split(" ");


const preparePageForTests = async (page) => {
  const userAgent = 'Mozilla/5.0 (X11; Linux x86_64)' +
  'AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.39 
Safari/537.36';
  await page.setUserAgent(userAgent);
  await page.evaluateOnNewDocument(() => {
  Object.defineProperty(navigator, 'webdriver', {
    get: () => false,
  });
});
await page.evaluateOnNewDocument(() => {
  window.chrome = {
    runtime: {},
  };
});
await page.evaluateOnNewDocument(() => {
  const originalQuery = window.navigator.permissions.query;
  return window.navigator.permissions.query = (parameters) => (
    parameters.name === 'notifications' ?
      Promise.resolve({ state: Notification.permission }) :
      originalQuery(parameters)
  );  
});
await page.evaluateOnNewDocument(() => {
  Object.defineProperty(navigator, 'plugins', {
    get: () => [1, 2, 3, 4, 5],
  });  
});
}

xvfb.startSync();

(async () => {
  const browser = await puppeteer.launch({
    args: ['--no-sandbox', '--proxy-server='+textByLine[0]],
    headless: true, });
  const page = await browser.newPage();
  page.authenticate({
      username: textByLine[1],
      password: textByLine[2]
  });
  await preparePageForTests(page);

  const testUrl ="https://publicindex.sccourts.org/abbeville/publicindex/";
  await page.goto(testUrl);
  const html = await page.content();
  await page.screenshot({path: 'result.png'});
  await browser.close()
  console.log(html)

})();
xvfb.stopSync();

感谢任何帮助，我对 node.js 还是很陌生，所以我提前为任何格式错误道歉。由于它主要是代码，我不允许发布它，所以我添加了这个额外的句子。

Answer 1

您似乎正在尝试使用 Xvfb Node 模块。虽然其他答案肯定有效，但这是一个在 nodejs 中完全有效的片段

const puppeteer = require('puppeteer')
const Xvfb = require('xvfb');

(async () => {
    var xvfb = new Xvfb({
        silent: true,
        xvfb_args: ["-screen", "0", '1280x720x24', "-ac"],
    });
    xvfb.start((err)=>{if (err) console.error(err)})
    const browser = await puppeteer.launch({
        headless: false,
        defaultViewport: null, //otherwise it defaults to 800x600
        args: ['--no-sandbox', '--start-fullscreen', '--display='+xvfb._display]
        });
    const page = await browser.newPage();
    await page.goto(`https://wikipedia.org`,{waitUntil: 'networkidle2'});
    await page.screenshot({path: 'result.png'});
    await browser.close()
    xvfb.stop();
})()

这在处理 xvfb.start() 中的错误(和可能的竞争条件)方面并不完美，但它应该让你开始，它对我来说非常一致。
编辑:记得先安装 Xvfb: sudo apt-get install xvfb (谢谢，@iamfrank)