class Async::HTTP::Body::ZStream

def self.encoding_name(window_size)
	if window_size <= -8
		return 'deflate'
	elsif window_size >= 16
		return 'gzip'
	else
		return 'compress'
	end
end

def initialize(body, stream)
	super(body)
	
	@stream = stream
	
	@input_size = 0
	@output_size = 0
end

def inspect
	"#{super} | \#<#{self.class} #{(ratio*100).round(2)}%>"
end

def ratio
	@output_size.to_f / @input_size.to_f
end

def stop(error)
	# There are two ways for the stream to be closed. Either #read returns nil or #stop is called.
	@stream.close unless @stream.closed?
	
	super
end