Fix for the twitter gem that allows Tweets with * in them

twitter_asterisk_fix.rb

require "uri"

# The encoder method of the http gem needs to be overriden because of the twitter gem.
# Without that, there's an incompatibility between the simple_oauth gem which encodes asterisks and the http one which does not.
# Cf. https://github.com/httprb/form_data/issues/22 and https://github.com/sferik/twitter/issues/6# 77
# I added a check to see if this method has been called from inside the twitter gem, so that other libraries can still use the default behavior
HTTP::FormData::Urlencoded.encoder = lambda do |enum, enc = nil|
  call_regex = Regexp.new(
    'gems/twitter-\d+.\d+.\d+/lib/twitter/rest/request.rb:\d+:in `public_send\'')
  if caller.any? call_regex
    unescaped_chars = /[^a-z0-9\-\.\_\~]/i
    enum.map do |k, v|
      if v.nil?
        ::URI::DEFAULT_PARSER.escape(k.to_s, unescaped_chars)
      elsif v.respond_to?(:to_ary)
        v.to_ary.map do |w|
          str = ::URI::DEFAULT_PARSER.escape(k.to_s, unescaped_chars)
          unless w.nil?
            str << '='
            str << ::URI::DEFAULT_PARSER.escape(w.to_s, unescaped_chars)
          end
        end.join('&')
      else
        str = ::URI::DEFAULT_PARSER.escape(k.to_s, unescaped_chars)
        str << '='
        str << ::URI::DEFAULT_PARSER.escape(v.to_s, unescaped_chars)
      end
    end.join('&')
  else
    ::URI.encode_www_form(enum, enc)
  end
end