Unquoted data URIs are valid

[tcrxt]

This issue is explained at http://stackoverflow.com/q/15481088/2657549

#something {
    background: url(data:image/png;base64,ABCDEF);
}

with a correct base64 encoding of an image instead of ABCDEF is valid according to http://www.w3.org/TR/CSS21/syndata.html#uri but throws an error when going through the validator:

 Value Error : background url(data:image/png;base64,ABCDEF) is an incorrect URL url(data:image/png;base64,ABCDEF) 

Is that a bug?

[ylafon]

The issue is on the URL parsing. I basically need to write a custom one for data:

[ylafon]

I am closing this issue for now, there may be another one to ensure the validity of the URL, but it is a CSS checker, not a URL one...

[sideshowbarker]

You might be able to just Galimatias, the Java-based URL-parsing library the Nu HTML Checker uses.

[ylafon]

Thanks @sideshowbarker the URL handling in the CSS validator needs a major rewrite (that is not the only part...), so such a library would be much welcomed.