高性能TcpServer - 4.文件通道(处理：文件分包，支持断点续传)

高性能tcpserver - 1.网络通信协议

高性能tcpserver - 2.创建高性能socket服务器socketasynceventargs的实现(iocp)

高性能tcpserver - 3.命令通道(处理：掉包，粘包，垃圾包)

高性能tcpserver - 4.文件通道(处理：文件分包，支持断点续传)

高性能tcpserver - 5.客户端管理

高性能tcpserver - 6.代码下载

 

应用场景：

升级程序

流程：终端->查询服务器版本比较->升级程序(获取包数，获取各包数据)->数据拼装生成文件->最后更新服务器上该设备的版本信息

分包代码段：

        static dictionary<int, string> readfile(string path)

        {

            dictionary<int, string> dicfiledata = new dictionary<int, string>();

            filestream fs = new filestream(path, filemode.open);

            binaryreader binreader = new binaryreader(fs);

            int bagindex = 1;

            int dataindex = 0;

            byte[] bbuffer = new byte[fs.length];

            int bagsize = 235;// 一包数据大小

            byte[] temp = new byte[bagsize];

            binreader.read(bbuffer, 0, (int)fs.length);

 

            for (int i = 0; i < bbuffer.length; i++)

            {

                if ((bagsize - 1) == dataindex || (bbuffer.length - 1) == i)

                {

                    if ((bbuffer.length - 1) == i) temp[dataindex++] = bbuffer[i];

                    string data = ccommonfunc.tohexstring(temp, dataindex, false);

                    dicfiledata.add(bagindex, data);

                    bagindex++;

                    dataindex = 0;

                    temp = new byte[bagsize];

                }

                temp[dataindex++] = bbuffer[i];

            }

            binreader.close();

            fs.close();

 

            return dicfiledata;

        }

测试：