pdf

app.get('/pdf', authenticated, async (req, res)=>{
    let browser = await puppeteer.launch();
    try {
        let page = await browser.newPage();
        await page.goto(url.format({
            protocol: 'http:',
            host: '127.0.0.1:3000',
            pathname: '/',
            query: req.query,
        }), {waitUntil: 'networkidle'});
        await page.evaluate(()=>new Promise(resolve=>{
            if (window.tn_onload)
                return resolve();
            window.tn_onload = resolve;
            setTimeout(resolve, 30000);
        }));
        let pdf = await page.pdf({format: 'A4'});
        res.writeHead(200, {
            'Content-Type': 'application/pdf',
            'Content-Disposition': 'attachment; filename=claim.pdf',
            'Content-Length': pdf.length,
        });
        res.end(pdf);
    } finally { browser.close(); }
});