class Escape::PercentEncoded

#split_html_form decodes percent-encoded string as application/x-www-form-urlencoded defined by HTML specification.

It recognizes “&” and “;” as a separator of key-value pairs.

If it find is not valid as application/x-www-form-urlencoded, Escape::InvalidHTMLForm exception is raised.

Escape::PercentEncoded.new("a=b&c=d")
#=> [[#<Escape::PercentEncoded: a>, #<Escape::PercentEncoded: b>],
     [#<Escape::PercentEncoded: c>, #<Escape::PercentEncoded: d>]]

Escape::PercentEncoded.new("a=b;c=d").split_html_form
#=> [[#<Escape::PercentEncoded: a>, #<Escape::PercentEncoded: b>],
     [#<Escape::PercentEncoded: c>, #<Escape::PercentEncoded: d>]]

Escape::PercentEncoded.new("%3D=%3F").split_html_form
#=> [[#<Escape::PercentEncoded: %3D>, #<Escape::PercentEncoded: %3F>]]

# File escape.rb, line 152
def split_html_form
  assoc = []
  @str.split(/[&;]/, -1).each {|s|
    raise InvalidHTMLForm, "invalid: #{@str}" unless /=/ =~ s
    k = $`
    v = $'
    k.gsub!(/\+/, ' ')
    v.gsub!(/\+/, ' ')
    assoc << [PercentEncoded.new_no_dup(k), PercentEncoded.new_no_dup(v)]
  }
  assoc
end