Is there a way to catch switching to download mode?

• Puppeteer version: v0.12.0-alpha
• Platform / OS version: Windows 7 x64
• URLs (if applicable): any with non-openable content type

A stright attempt just throws a timeout (the file is downloaded successfully though):

const puppeteer = require('puppeteer');

(async function main() {
  try {
    const browser = await puppeteer.launch();
    const page = await browser.newPage();

    const response = await page.goto('https://nodejs.org/dist/v8.6.0/node-v8.6.0.tar.gz');

    console.log(response.status);

    await browser.close();
  } catch (err) {
    console.error(err);
  }
})();

Error: Navigation Timeout Exceeded: 30000ms exceeded
    at NavigatorWatcher.waitForNavigation (puppeteer\lib\NavigatorWatcher.js:73:20)
    at <anonymous>

[aslushnikov]

@vsemozhetbyt ah makes sense, thank you for sharing.

[aslushnikov]

This behaves much better now. Chromium aborts navigation to resource if it causes a download. With pptr 1.4.0, this kind of navigation results in ERR:Aborted being thrown; with #299 in place we’ll also get a download event.