Method: Web.unescape_html

Defined in:

lib/web.rb

.unescape_html(string) ⇒ Object Also known as: unescapeHTML

Unescape a string that has been HTML-escaped

Web::unescape_html("Usage: foo "bar" <baz>")
   # => "Usage: foo \"bar\" <baz>"

(from cgi.rb)

# File 'lib/web.rb', line 245

def Web::unescape_html(string)
  return nil unless string
  string.gsub(/&(.*?);/n) do
    match = $1.dup
    case match
    when /\Aamp\z/ni           then '&'
    when /\Aquot\z/ni          then '"'
    when /\Agt\z/ni            then '>'
    when /\Alt\z/ni            then '<'
    when /\A#0*(\d+)\z/n       then
      if Integer($1) < 256
        Integer($1).chr
      else
        if Integer($1) < 65536 and ($KCODE[0] == ?u or $KCODE[0] == ?U)
          [Integer($1)].pack("U")
        else
          "&##{$1};"
        end
      end
    when /\A#x([0-9a-f]+)\z/ni then
      if $1.hex < 256
        $1.hex.chr
      else
        if $1.hex < 65536 and ($KCODE[0] == ?u or $KCODE[0] == ?U)
          [$1.hex].pack("U")
        else
          "&#x#{$1};"
        end
      end
    else
      "&#{match};"
    end
  end
end