The parameter of request.getHeader() need to be case insensitive

[namutaka]

According to the javadoc, the parameter is considered case insensitive:
http://docs.oracle.com/javaee/7/api/javax/servlet/http/HttpServletRequest.html#getHeader-java.lang.String-

[seratch]

If I understand correctly, at the current moment, it depends on Servlet container implementations. skinny-micro just returns the value from Servlet API layer. But I agree it might be better to follow the implementation described on the javadoc you pointed.