Add support for Raspberry PI

[viktor-morin]

WebDriverManager.Net don't have any webdriver which support the Raspberry PI architecture.
However, to run it natively on Raspberry PI, following Firefox driver can be used:

get https://github.com/mozilla/geckodriver/releases/download/v0.33.0/geckodriver-v0.33.0-linux-aarch64.tar.gz
Make it executable chmod +x /usr/local/bin/geckodriver

Specify the path when creating the driver:
new FirefoxDriver(path, options);

Would be nice if WebDriverManager.Net would support Raspberry PI, at least for once browser.

[rosolko]

This library does not support exact devices directly. Instead, it works with the operating system and browsers. As for provided example, it's definitely linux with aarch64 architecture with firefox, and this case is supported by library.

[viktor-morin]

Running following code on Windows works:

var options = new FirefoxOptions();
options.AddArgument("-headless");

var path = new DriverManager()
    .SetUpDriver(new FirefoxConfig());

return new FirefoxDriver(path, options);

Using the recommended image (Raspberry PI OS 64-bit port of Debian Bookworm), and it gives following error:

Unhandled exception. System.ComponentModel.Win32Exception (8): An error occurred trying to start process '/temp/Firefox/0.36.0/X64/geckodriver' with working directory '/temp'. Exec format error at System.Diagnostics.Process.ForkAndExecProcess(ProcessStartInfo startInfo, String resolvedFilename, String[] argv, String[] envp, String cwd, Boolean setCredentials, UInt32 userId, UInt32 groupId, UInt32[] groups, Int32& stdinFd, Int32& stdoutFd, Int32& stderrFd, Boolean usesTerminal, Boolean throwOnNoExec)

[rosolko]

As far as I can see manager downloaded the driver binary and error is not related to manager but related to binary. So the question is - will this binary (even downloaded directly from github releases) work on raspberry pi (not on windows) without manager at all?

[viktor-morin]

Checking the driver, it's seems to be exactly the same one. The one I downloaded manually, that works:
geckodriver 0.33.0 (a80e5fd61076 2023-04-02 18:31 +0000)

And the one WebDriver is downloading for me:
geckodriver 0.33.0 (a80e5fd61076 2023-04-02 18:31 +0000)

I'm manually setting it to an executable (have done this for both files) : chmod +x geckodriver

---

If I start it manually it seems to work:

xx@raspberrypi:/temp/Firefox/0.36.0/X64 $ geckodriver
1743920983827   geckodriver     INFO    Listening on 127.0.0.1:4444

[rosolko]

Then if it start and work manually then library works well - I mean, download driver for browser.
Because the library has no effect on future work with binary.
Correct me if I missunderstood you or wrong.

[viktor-morin]

Then if it start and work manually then library works well - I mean, download driver for browser. Because the library has no effect on future work with binary. Correct me if I missunderstood you or wrong.

The library seems to download the correct file, but for some reason it don't work when the file is downloaded through WebDriver compared to when it's downloaded manually. I guess it may be out of scope for WebDriver's point of view. However, this mean it's still not possible to just use WebDriver on Raspberry Pi architecture without manually interfere.