addressable_unicode.rb

# encoding: utf-8
require 'addressable/uri'

str = "http://उदाहरण.परीक्षा/मुख्य_पृष्ठ"

puts "original:"
puts "#=> #{str}"
#=> http://उदाहरण.परीक्षा/मुख्य_पृष्ठ

normalized = Addressable::URI.parse(str).normalize

puts "normalized:"
puts "#=> #{normalized.to_s}" 
#=> http://xn--p1b6ci4b4b3a.xn--11b5bs3a9aj6g/%E0%A4%AE%E0%A5%81%E0%A4%96%E0%A5%8D%E0%A4%AF_%E0%A4%AA%E0%A5%83%E0%A4%B7%E0%A5%8D%E0%A4%A0

nicer = normalized.display_uri.to_s

puts "display_uri:"
puts "#=> #{nicer}" 
#=> http://उदाहरण.परीक्षा/%E0%A4%AE%E0%A5%81%E0%A4%96%E0%A5%8D%E0%A4%AF_%E0%A4%AA%E0%A5%83%E0%A4%B7%E0%A5%8D%E0%A4%A0

display_s = Addressable::URI.parse(str).display_uri.to_s
pretty = Addressable::URI.unencode(display_s.force_encoding("ASCII-8BIT"))

puts "unencoded:"
puts "#=> #{pretty}"
#=> http://उदाहरण.परीक्षा/मुख्य_पृष्ठ