CssUrlFilter fix

[tomasnikl]

return default css code if absolutizeUrl() failed

[fprochazka]

Can you elaborate please? Or write a test? When does it fail?

[juniwalk]

@fprochazka I have AdminLTE.min.css in webloader with url fixed and it completely destroys the file, it is empty, this fix is needed.

//EDIT: I tested webloader with this code and it works.

[fprochazka]

That's cool, but I need a testcase for it. Either I write it, which might take months till I have time for it, or you guys do it :)

@juniwalk do you think you could please try to isolate the problem and write a test? Are we sure this isn't some regex platform limit problem like those errors with latte/neon ?

[juniwalk]

@fprochazka Well I can try, but I'd have to open new pull since I can't commit to this one, can I?

[fprochazka]

@juniwalk I don't think thats a problem, is it? You can simply cherrypick this commit to your PR.

[juniwalk]

I am probably just looking into details, I will try to look where the problem lies tomorrow.

[juniwalk]

@fprochazka So in AdminLTE.css there is @import url(https://fonts.googleapis.com/css?family=Source+Sans+Pro:300,400,600,700,300italic,400italic,600italic); on first line, if I remove it, the CSS is filtered normally.

// EDIT: If I just add quotes it works too, looks like missing quotes is the bottleneck