Ensure the compatibility of retrieving the Google Drive home page with Selenium using the "check_and_gen.py" script on Ubuntu 20.04 with the Chromium/Canonical Snap distribution

[marin-m]

Hello,

This pull request fixes two bugs:

1. When running the "check_and_gen.py" script on Ubuntu 20.04 with Chromium 101 installed from the standard Ubuntu Snap package, the script was crashing at the Fetching Drive homepage... step with the following error message:

selenium.common.exceptions.WebDriverException: Message: unknown error: DevToolsActivePort file doesn't exist 

It was due to the fact that when using the Chromium binary located at /snap/bin/chromium, the /tmp directory is made available at a different place, which causes incompatibility with Selenium.

This was fixed by changing the executable names at which a valid Chromedriver binary can be found, adding chromium.chromedriver in addition to chromedriver which was already checked for, as this solves the issue as explained here: https://stackoverflow.com/questions/64992087/webdriverexception-unknown-error-devtoolsactiveport-file-doesnt-exist-while-t

2. After solving the first issue, the concerned step of fetching the Google Drive home page was still not succeeding due to another error:

selenium.common.exceptions.TimeoutException: Message: timeout: Timed out receiving message from renderer: 298,708

This was due because the Google Drive home page was never really finishing to load. After disabling the headless mode within the config.py file and looking at the web console, I could understand that it was because an HTTP request was being cyclically emitted towards the https://www.gstatic.com/images/icons/material/system/1x/broken_image_grey600_18dp.png image (with Selenium returning a fake 403 response every time); I could then observe the unfiltering PNG images in the drive_interceptor function would solve the issue and have the page load succeed almost immediately.

After applying these two changes, the check_and_gen.py script gets to work on my setup.

Regards,

[mxrch]

Thanks a lot !