Public suffix list is misused, yielding incorrect results

I actually discovered this bug when using TldExtract and logged an issue in that repo. I’m posting the problem here as well because this library is (seemingly) actively maintained.

The problem is that the public suffix list is not a list of TLDs.

Repro code:

void Main()
{
    try
    {
        var parser = new DomainParser(new WebTldRuleProvider());
        Console.WriteLine(parser.Parse("https://s3.amazonaws.com"));
    }
    catch (Exception ex)
    {
        Console.WriteLine($"{ex.GetType().Name}: {ex.Message}");
    }
}

Console output:

ParseException: Domain is a TLD according publicsuffix

[tinohager]

Thank you you are welcome to use another project if this one does not meet your needs

[bhood-zorus]

Your library is fundamentally flawed with the assumption that the public suffix list is a list of TLDs. I have provided a laughably trivial example that proves that WebTldRuleProvider is completely unfit for real world use. If you’re okay with that, then I won’t add any further comments to this issue.