卡斯帕使用PhantomJS，而幻影本身無法登錄谷歌帳戶登錄。它似乎使用了phantomjs中不支持的任何ES6功能，它以靜默方式失敗。
也許你可以有更多的運氣與beta phantomjs 2.5。 無論如何，phantomjs不贊成使用無鉻鍍鉻。正如幻影維護者維塔利Slobodin https://groups.google.com/forum/#!topic/phantomjs/9aI5d-LDuNE
說，好消息是，你可以在無頭模式啓動鉻：/opt/google/chrome/chrome --headless --disable-gpu --repl，做任何你想要的。
可以在節點與--remote-debugging-port=9224更換--repl來控制它在任何遠程代碼，就像一個程序... 有庫來控制它像phantomjs。 高級別（如幻影）：https://github.com/GoogleChrome/puppeteer 下級擁有更多的控制：https://github.com/cyrus-and/chrome-remote-interface#clientdomainmethodparams-callback
目前我沒有運氣的木偶但鉻遠程接口，我能夠在谷歌帳戶登錄。
const CDP = require('chrome-remote-interface');
const argv = require('minimist')(process.argv.slice(2));
const file = require('fs');
// CLI Args
const url = argv.url || 'https://accounts.google.com';
const format = argv.format === 'jpeg' ? 'jpeg' : 'png';
const viewportWidth = argv.viewportWidth || 1440;
const viewportHeight = argv.viewportHeight || 900;
let delay = argv.delay || 0;
const userAgent = argv.userAgent;
const fullPage = argv.full;
// Start the Chrome Debugging Protocol
CDP(async function(client) {
// Extract used DevTools domains.
const {DOM, Emulation, Network, Page, Runtime} = client;
// Enable events on domains we are interested in.
await Page.enable();
await DOM.enable();
await Network.enable();
// If user agent override was specified, pass to Network domain
if (userAgent) {
await Network.setUserAgentOverride({userAgent});
}
// Set up viewport resolution, etc.
const deviceMetrics = {
width: viewportWidth,
height: viewportHeight,
deviceScaleFactor: 0,
mobile: false,
fitWindow: false,
};
await Emulation.setDeviceMetricsOverride(deviceMetrics);
await Emulation.setVisibleSize({width: viewportWidth, height: viewportHeight});
// Navigate to target page
await Page.navigate({url});
// Wait for page load event to take screenshot
Page.loadEventFired(async() => {
// If the `full` CLI option was passed, we need to measure the height of
// the rendered page and use Emulation.setVisibleSize
if (fullPage) {
const {root: {nodeId: documentNodeId}} = await DOM.getDocument();
const {nodeId: bodyNodeId} = await DOM.querySelector({
selector: 'body',
nodeId: documentNodeId,
});
const {model: {height}} = await DOM.getBoxModel({nodeId: bodyNodeId});
await Emulation.setVisibleSize({width: viewportWidth, height: height});
// This forceViewport call ensures that content outside the viewport is
// rendered, otherwise it shows up as grey. Possibly a bug?
await Emulation.forceViewport({x: 0, y: 0, scale: 1});
}
let expr="document.querySelector('input[type=email]').value='[email protected]';";
expr+="document.querySelectorAll('div[role=button]')[0].click();";
setTimeout
let x=await Runtime.evaluate({expression: expr});
console.log('******' + JSON.stringify(x));
setTimeout(async function(){
expr="document.querySelector('input[type=password]').value='YOUR_PASSWORD';";
expr+="document.querySelectorAll('div[role=button]')[1].click()";
x=await Runtime.evaluate({expression: expr});
console.log('******' + JSON.stringify(x));
x=await (async function() {
let expr="document.querySelector('input[type=password]')";
return Runtime.evaluate({expression: expr});
})()
console.log('**' + JSON.stringify(x));
}, 2000);
delay=5000
setTimeout(async function() {
const screenshot = await Page.captureScreenshot({format});
const buffer = new Buffer(screenshot.data, 'base64');
file.writeFile('output.png', buffer, 'base64', function(err) {
if (err) {
console.error(err);
} else {
console.log('Screenshot saved');
}
client.close();
});
}, delay);
});
}).on('error', err => {
console.error('Cannot connect to browser:', err);
});
參考文獻： https://medium.com/@dschnr/using-headless-chrome-as-an-automated-screenshot-tool-4b07dffba79a
https://github.com/GoogleChrome/puppeteer/blob/master/docs/api.md#browserwsendpoint
https://developers.google.com/web/updates/2017/04/headless-chrome