Chris@441: require 'iconv'
Chris@441: 
Chris@441: module Redmine
Chris@441:   module CodesetUtil
Chris@441: 
Chris@441:     def self.replace_invalid_utf8(str)
Chris@441:       return str if str.nil?
Chris@441:       if str.respond_to?(:force_encoding)
Chris@441:         str.force_encoding('UTF-8')
Chris@441:         if ! str.valid_encoding?
Chris@441:           str = str.encode("US-ASCII", :invalid => :replace,
Chris@441:                 :undef => :replace, :replace => '?').encode("UTF-8")
Chris@441:         end
Chris@441:       else
Chris@441:         ic = Iconv.new('UTF-8', 'UTF-8')
Chris@441:         txtar = ""
Chris@441:         begin
Chris@441:           txtar += ic.iconv(str)
Chris@441:         rescue Iconv::IllegalSequence
Chris@441:           txtar += $!.success
Chris@441:           str = '?' + $!.failed[1,$!.failed.length]
Chris@441:           retry
Chris@441:         rescue
Chris@441:           txtar += $!.success
Chris@441:         end
Chris@441:         str = txtar
Chris@441:       end
Chris@441:       str
Chris@441:     end
Chris@441:   end
Chris@441: end