class Frame

parameter　length　Integer

The length of the payload, or nil if the header has not been read yet.

parameter　mask　Boolean | String

An optional 4-byte string which is used to mask the payload.

def initialize(finished = true, payload = nil, flags: 0, opcode: self.class::OPCODE, mask: false)
	if mask == true
		mask = SecureRandom.bytes(4)
	end
	
	@finished = finished
	@flags = flags
	@opcode = opcode
	@mask = mask
	@length = payload&.bytesize
	@payload = payload
end

returns　Boolean

if the frame contains data.

def data?
	false
end