socket文件下载

古城微笑少年丶 2022-07-29 10:38 118阅读 0赞

贴下主要源码，具体有优化socket部分，没做异常处理，此码只为测试。

/// <summary>
            /// stream转byte[]
            /// </summary>
            static byte[] StreamToBytes(Stream stream)
            {
                byte[] bytes = new byte[stream.Length];
                stream.Read(bytes, 0, bytes.Length);
                //设置当前流的位置为流的开始
                stream.Seek(0, SeekOrigin.Begin);
                return bytes;
            }
            /// <summary>
            /// byte[]转Stream
            /// </summary>
            static Stream BytesToStream(byte[] bytes)
            {
                Stream stream = new MemoryStream(bytes);
                return stream;
            }
    
            /// <summary>
            /// GZipStream压缩字符串
            /// </summary>
            static Stream GZipCompress(string str)
            {
                MemoryStream msReturn;
                byte[] buffer = Encoding.UTF8.GetBytes(str);
    
                using (MemoryStream msTemp = new MemoryStream())
                {
                    using (GZipStream gz = new GZipStream(msTemp, CompressionMode.Compress, true))
                    {
                        gz.Write(buffer, 0, buffer.Length);
                        gz.Close();
    
                        msReturn = new MemoryStream(msTemp.GetBuffer(), 0, (int)msTemp.Length);
                    }
                }
    
                return msReturn;
            }
    
            class resultmodel
            {
                public int code { get; set; }
                public bool success { get; set; }
                public string msg { get; set; }
                public object data { get; set; }
            }

socket部分：

static void loadfile()
            {
                //本机的loopback网络地址，即127.0.0.1
                IPAddress address = IPAddress.Loopback;
                //创建可以访问的端点，49152表示端口号，如果设置为0，表示使用一个空闲的端口号
                IPEndPoint endPoint = new IPEndPoint(address, 49152);
                //创建socket，使用IPv4地址，传输控制协议TCP，双向、可靠、基于链接的字节流
                Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                //将socket绑定到端点上
                socket.Bind(endPoint);
    
                //设置链接队列的长度
                socket.Listen(10);
                Console.WriteLine("开始监监听，端口号：{0}", endPoint.Port);
    
                bool tag = false;
                while (!tag)
                {
                    //开始监听，这个方法会阻塞线程的执行，直到接收到一个客户端的链接请求
                    Socket client = socket.Accept();
                    Console.WriteLine(client.RemoteEndPoint);
    
                    byte[] buffer = new byte[4096];
                    //接收数据
                    int length = client.Receive(buffer, 4096, SocketFlags.None);
                    //将请求的数据翻译为UTF-8
                    string requestString = Encoding.UTF8.GetString(buffer, 0, length);
                    Console.WriteLine(requestString);
    
                    //回应的消息
                    var data = new resultmodel { code = 100, success = true, msg = "请求成功" };
                    var responseString = JsonConvert.SerializeObject(data);
    
                    //GZip压缩
                    var stream = GZipCompress(responseString);
                    //发送内容到客户端
                    client.Send(StreamToBytes(stream)); //客户端会下载一个文件
                    client.Close();
    
                    //if (Console.KeyAvailable)
                    //    break; //退出循环
                    tag = true;
                }
    
                //关闭监听
                socket.Close();
                Console.ReadKey();
            }