class Protocol::HTTP::Response

def self.[](status, headers = nil, body = nil, protocol = nil)
	body = Body::Buffered.wrap(body)
	headers = ::Protocol::HTTP::Headers[headers]
	
	self.new(nil, status, headers, body, protocol)
end

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

def bad_request?
	@status == 400
end

def continue?
	@status == 100
end

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

def hijack?
	false
end

def initialize(version = nil, status = 200, headers = Headers.new, body = nil, protocol = nil)
	@version = version
	@status = status
	@headers = headers
	@body = body
	@protocol = protocol
end

def not_modified?
	@status == 304
end

def partial?
	@status == 206
end

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

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

def server_failure?
	@status == 500
end

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

def to_ary
	return @status, @headers, @body
end

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