Created
January 6, 2019 20:18
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Google Cloud Function
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const puppeteer = require('puppeteer'); | |
let page; | |
async function getBrowserPage() { | |
// Launch headless Chrome. Turn off sandbox so Chrome can run under root. | |
const browser = await puppeteer.launch({args: [ | |
'--no-sandbox' | |
]}); | |
return browser.newPage(); | |
} | |
exports.screenshot_example = async (req, res) => { | |
if (!page) { | |
page = await getBrowserPage(); | |
} | |
function scrapeForConsoleMessage(message) { | |
return new Promise(function consoleListener(resolve, err) { | |
page.on('console', msg => { | |
// Turn on debugging with &debug in the request URL | |
// All unity output is then logged in stackdriver | |
if (req.query.debug) console.log(msg.text()); | |
if (msg.text() === message) { | |
page.removeListener('console', consoleListener); | |
resolve(); | |
} | |
}); | |
}) | |
} | |
url = `https://storage.googleapis.com/public_website/examples/unity-serverless/build/index.html` + | |
`?r=${req.query.r || 0}&g=${req.query.g || 0}&b=${req.query.b || 0}` | |
var scraper = scrapeForConsoleMessage('Screenshotter: capture now'); | |
console.log(`Fetching ${url}`); | |
page.setViewport({ | |
width: 960, | |
height: 600 | |
}); | |
page.goto(url); | |
await scraper; | |
console.log("Cloud function: Screenshotting") | |
const gameContainerDOM = await page.$('#gameContainer'); | |
const imageBuffer = await gameContainerDOM.screenshot(); | |
res.set('Content-Type', 'image/png'); | |
res.send(imageBuffer); | |
}; |
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