UI does not load with scandinavian characters in URL parameters

Vaadin 6 / 7 / 8
1

UI does not load (progress indication keeps scrolling) if there are Scandinavian characters in URL parameters.

These are working:
http://demo.vaadin.com/sampler/?param=_%20_
http://demo.vaadin.com/sampler/?param=_%20_#addons/directory

These are not:
http://demo.vaadin.com/sampler/?param=_�_
http://demo.vaadin.com/sampler/?param=_�_#addons/directory

Is there a workaround?

Thanks beforehand!

2

Firefox seems to throw a JavaScript URIException somewhere because the encoding of “ä” in that URI is ISO 8859-1, not UTF-8. I’m not sure where exactly, and I can’t seem to reproduce the problem with a smaller test case, but anyway a workaround is to use UTF-8;
param=%C3%A4
 or indeed
param=ä
 seem to both work fine.