compute-1.amazonaws.com return none

[Kuzuto]

Hi,
I made a test on the hostname "ec2-100-24-188-149.compute-1.amazonaws.com" , and was expecting it to return amazonaws.com.
But I'm getting None as return.

    def test_amazonaws(self):
        self.assertEqual(self.psl.privatesuffix("ec2-100-24-188-149.compute-1.amazonaws.com"), "amazonaws.com")

'amazonaws.com' != None
Expected :None
Actual :'amazonaws.com'

If I remove the first ec2-... I'm getting correct result:

    def test_amazonaws(self):
        self.assertEqual(self.psl.privatesuffix("compute-1.amazonaws.com"), "amazonaws.com")

PASSED [100%]
Process finished with exit code 0

In https://publicsuffix.org/list/public_suffix_list.dat I can see *.compute-1.amazonaws.com.
Should the first not match ?

[ko-zu]

Assume you used the current PSL untouched, None should be correct for the first test.

psl.privatesuffix("compute-1.amazonaws.com") == "amazonaws.com" because "compute-1.amazonaws.com" and "amazonaws.com" are not a public suffix, but still, "ec2-aaa-aaa-aaa-aaa.compute-1.amazonaws.com" is a public suffix since the PSL declared that "*.compute-1.amazonaws.com" is a wildcard public suffix.

psl.privatesuffix("ec2-aaa-aaa-aaa-aaa.compute-1.amazonaws.com") == psl.privatesuffix("com") == None, which means the argument has no private part on top of the public suffix.

Such a company-owned public suffix declaration can be ignored with PublicSuffixList(only_icann=True) option.

[Kuzuto]

Make sense.. thank you.