How to download file with puppeteer using headless: true?

Question

I\'ve been running the following code in order to download a csv file from the website http://niftyindices.com/resources/holiday-calendar:

Answer 1

I needed to download a file from behind a login, which was being handled by Puppeteer. targetcreated was not being triggered. In the end I downloaded with request, after copying the cookies over from the Puppeteer instance.

In this case, I'm streaming the file through, but you could just as easily save it.

    res.writeHead(200, {
        "Content-Type": 'application/octet-stream',
        "Content-Disposition": `attachment; filename=secretfile.jpg`
    });
    let cookies = await page.cookies();
    let jar = request.jar();
    for (let cookie of cookies) {
        jar.setCookie(`${cookie.name}=${cookie.value}`, "http://secretsite.com");
    }
    try {
        var response = await request({ url: "http://secretsite.com/secretfile.jpg", jar }).pipe(res);
    } catch(err) {
        console.trace(err);
        return res.send({ status: "error", message: err });
    }