NewFlushHandler is factory method to create flush handler.

NewGifFlushHandler create a new gif flush handler.

NewImageFlusherHandler create a new image flusher handler.

BaseFlushHandler is a basic flush handler that define some basic opration.

GifFlushHandler extends from BaseFlushHandler, and responsible for flushing the gif frames to remote client.

ImageFlushHandler extends the BaseFlushHandler and responsible for flush the ASCII image to remote client.

FlushHandler define the basic oprations that flush image to remote server.