Gt06ProtocolDecoder.java 文件源码

private void sendPhotoRequest(Channel channel, int pictureId) {
    if (channel != null) {
        ChannelBuffer photo = photos.get(pictureId);
        ChannelBuffer response = ChannelBuffers.dynamicBuffer();
        response.writeShort(0x7878); // header
        response.writeByte(15); // size
        response.writeByte(MSG_X1_PHOTO_DATA);
        response.writeInt(pictureId);
        response.writeInt(photo.writerIndex());
        response.writeShort(Math.min(photo.writableBytes(), 1024));
        response.writeShort(++serverIndex);
        response.writeShort(Checksum.crc16(Checksum.CRC16_X25,
                response.toByteBuffer(2, response.writerIndex() - 2)));
        response.writeByte('\r'); response.writeByte('\n'); // ending
        channel.write(response);
    }
}