Can't fetch external style from KML

Describe the bug Unable to fetch external KML style from <styleUrl>. It may detect a wrong baseUri, can’t fetch style and then display default style.

To Reproduce Steps to reproduce the behavior:

1. Read a KML file that contains external style (exemple with <styleUrl>http://www.gdacs.org/styles/kmlstyle.kml#TC_Line</styleUrl>)
2. Try again with a kml viewer like http://kmlviewer.nsspot.net/
3. See error

Bug :

Expected behavior Expected style :

[hlehmann]

Thanks for your quick answers, so there is two issues here :

1. readFeatures() is synchronous for now, so it can’t load styles from external sources. The solution I see is to first check every external sourceUrl and load them before to execute readFeatures().
2. gdacs is not respecting CORS protocol causing issues with images but that’s not linked to openlayers, {crossOrigin: null} could be a solution.

[mike-000]

You could use new KML({crossOrigin: null}) to allow cross origin icons without CORS if you can tolerate imprecise hit detection and tainted canvas.