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Google Chrome headless sample code
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| const http = require('http') | |
| const Koa = require('koa') | |
| const CDP = require('chrome-remote-interface') | |
| const PORT = process.argv[2] || 3000 | |
| const ADDRESS = process.argv[3] || '0.0.0.0' | |
| const app = new Koa() | |
| app.use(async (ctx, next) => { | |
| const URL = ctx.request.url.substr(1) | |
| await next() | |
| CDP((client) => { | |
| const { Network, Page, Runtime } = client | |
| Network.requestWillBeSent(params => params.request.url) | |
| Page.loadEventFired(() => { | |
| console.log('Page loaded.') | |
| setTimeout(() => { | |
| Runtime.evaluate({expression: 'document.documentElement.outerHTML'}).then(result => { | |
| console.log('Page evaluate succeeded.') | |
| ctx.body = '<!DOCTYPE html>' + result.result.value | |
| }) | |
| client.close() | |
| }, 3000) | |
| }) | |
| Promise.all([Network.enable(), Page.enable()]) | |
| .then(() => { | |
| return Page.navigate({ url: URL }) | |
| }).catch((err) => { | |
| console.error(err) | |
| client.close() | |
| }) | |
| }).on('error', (err) => { | |
| console.error('CDP ERROR.', err) | |
| ctx.body = '<html></html>' | |
| }) | |
| }) | |
| http.createServer(app.callback()).listen(PORT, ADDRESS, () => { | |
| console.log('Starting prerender server on http://%s:%s', ADDRESS, PORT) | |
| }) |
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