class Falcon::Adapters::Input

@returns [Boolean] Whether the body could be rewound.

`rewind` must be called without arguments. It rewinds the input stream back to the beginning. It must not raise Errno::ESPIPE: that is, it may not be a pipe or a socket. Therefore, handler developers must buffer the input data into some rewindable object if the underlying input stream is not rewindable.

Rewind the input stream back to the start.

def rewind
	if @body and @body.respond_to? :rewind
		# If the body is not rewindable, this will fail.
		@body.rewind
		@buffer = nil
		@finished = false
		
		return true
	end
	
	return false
end