UTF-8 characters mangled in HTTP Basic Auth username -> 5 years later

Question

I was reading the following topic UTF-8 characters mangled in HTTP Basic Auth username because I'm experiencing the same problem in Rails.

Since the topic is from 2009, is there a solution after 5 years?

Kind regards

EDIT: If this is considered unorthodox to ask a question in this way -> I am very sorry.

Answer 1

There is a solution proposal in http://greenbytes.de/tech/webdav/draft-ietf-httpauth-basicauth-enc-02.html, but AFAIK it hasn't been implemented by user agents and servers yet.