Marshmallow: fields.Url ValidationError parsing internationalized domain name

[sansculotte]

Description

The perfectly valid urls in the test case below are resolved correctly by most contemporary browsers (and – curiously – wget, but not curl), but do not pass marshmallows Url field validation. Which i think they should, because they do show up in real world data.

I'm not sure how to best approach the problem.

Test Case

"""Tests for marshmallow.validate"""
import pytest

from marshmallow import validate


@pytest.mark.parametrize(
    "valid_url",
    [
        "http://www.kunstkontor-nürnberg.de",
        "http://💩.la",
    ],
)
def test_url_absolute_valid(valid_url):
    validator = validate.URL(relative=False)
    assert validator(valid_url) == valid_url

[deckar01]

We may want to consider using urllib.

https://docs.python.org/3/library/urllib.parse.html#module-urllib.parse