CGI::Util#unescape

unescape(string, encoding = @@accept_charset)

# File tmp/rubies/ruby-3.4.1/lib/cgi/util.rb, line 27
def unescape(string, encoding = @@accept_charset)
  str = string.tr('+', ' ')
  str = str.b
  str.gsub!(/((?:%[0-9a-fA-F]{2})+)/) do |m|
    [m.delete('%')].pack('H*')
  end
  str.force_encoding(encoding)
  str.valid_encoding? ? str : str.force_encoding(string.encoding)
end

URL-decode an application/x-www-form-urlencoded string with encoding(optional).

Example

string = CGI.unescape("%27Stop%21%27+said+Fred")
   # => "'Stop!' said Fred"

See also #rfc1123_date #unescape_element #pretty #unescapeElement also in 3.3 · 3.2 · 3.1 · 3.0

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