class Async::HTTP::Response

def self.[](status, headers = {}, body = [])
	body = Body::Buffered.wrap(body)
	
	self.new(nil, status, nil, headers, body)
end

def self.for_exception(exception)
	Async::HTTP::Response[500, {'content-type' => 'text/plain'}, ["#{exception.class}: #{exception.message}"]]
end

def bad_request?
	status == 400
end

def continue?
	status == 100
end

def failure?
	status >= 400 && status < 600
end

def initialize(version = nil, status = 200, reason = nil, headers = [], body = nil)
	@version = version
	@status = status
	@reason = reason
	@headers = headers
	@body = body
end

def preserve_method?
	status == 307 || status == 308
end

def redirection?
	status >= 300 && status < 400
end

def success?
	status >= 200 && status < 300
end

def to_s
	"#{@status} #{@reason} #{@version}"
end