module Puma::Util

def escape(s, encoding = Encoding::UTF_8) 

def escape(s, encoding = Encoding::UTF_8)
  URI.encode_www_form_component(s, encoding)
end

def escape(s, encoding = nil) 

def escape(s, encoding = nil)
  URI.encode_www_form_component(s, encoding)
end

def parse_query(qs, d = nil, &unescaper)

parameter (which defaults to '&;').
cookies by changing the characters used in the second
and ';' characters. You can also use this to parse
Parses a query string by breaking it up at the '&'
Stolen from Mongrel, with some small modifications: 
def parse_query(qs, d = nil, &unescaper)
  unescaper ||= method(:unescape)
  params = {}
  (qs || '').split(d ? /[#{d}] */n : DEFAULT_SEP).each do |p|
    next if p.empty?
    k, v = p.split('=', 2).map(&unescaper)
    if cur = params[k]
      if cur.class == Array
        params[k] << v
      else
        params[k] = [cur, v]
      end
    else
      params[k] = v
    end
  end
  params
end

def pipe 

def pipe
  IO.pipe
end

def purge_interrupt_queue

Additional context: https://github.com/puma/puma/pull/1345
which currently effects some older versions of Ruby: 2.2.7 2.2.8 2.2.9 2.2.10 2.3.4 2.4.1
An instance method on Thread has been provided to address https://bugs.ruby-lang.org/issues/13632, 
def purge_interrupt_queue
  Thread.current.purge_interrupt_queue if Thread.current.respond_to? :purge_interrupt_queue
end

def unescape(s, encoding = Encoding::UTF_8) 

def unescape(s, encoding = Encoding::UTF_8)
  URI.decode_www_form_component(s, encoding)
end

def unescape(s, encoding = nil) 

def unescape(s, encoding = nil)
  URI.decode_www_form_component(s, encoding)
end