C# Socket传输大文件
1.基础类TransferFiles，client和server都需要
using System; using System.Collections.Generic; using System.Text; using System.Net; using System.Net.Sockets; using System.Windows.Forms; namespace Server { public class TransferFiles { public static int SendData(Socket s, byte[] data) { int total = 0; int size = data.Length; int dataleft = size; int sent; while (total < size) { sent = s.Send(data, total, dataleft, SocketFlags.None); total += sent; dataleft -= sent; } return total; } public static byte[] ReceiveData(Socket s, int size) { int total = 0; int dataleft = size; byte[] data = new byte[size]; int recv; while (total < size) { recv = s.Receive(data, total, dataleft, SocketFlags.None); if (recv == 0) { data = null; break; } total += recv; dataleft -= recv; } return data; } public static int SendVarData(Socket s, byte[] data) { int total = 0; int size = data.Length; int dataleft = size; int sent; byte[] datasize = new byte[4]; try { datasize = BitConverter.GetBytes(size); sent = s.Send(datasize); while (total < size) { sent = s.Send(data, total, dataleft, SocketFlags.None); total += sent; dataleft -= sent; } return total; } catch { return 3; } } public static byte[] ReceiveVarData(Socket s) { int total = 0; int recv; byte[] datasize = new byte[4]; recv = s.Receive(datasize, 0, 4, SocketFlags.None); int size = BitConverter.ToInt32(datasize, 0); int dataleft = size; byte[] data = new byte[size]; while (total < size) { recv = s.Receive(data, total, dataleft, SocketFlags.None); if (recv == 0) { data = null; break; } total += recv; dataleft -= recv; } return data; } } }
2.Server端
using System; using System.Collections.Generic; using System.Text; using System.Net; using System.Net.Sockets; using System.Threading; using System.IO; using System.Configuration; namespace Server { public static class FileServer { private static Socket serverSocket; public static void Init() { //服务器IP地址 IPAddress ip = IPAddress.Parse(ConfigurationManager.AppSettings["ListenIP"]); int myProt = Convert.ToInt32(ConfigurationManager.AppSettings["ListenFilePort"]); serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); serverSocket.Bind(new IPEndPoint(ip, myProt)); //绑定IP地址：端口 serverSocket.Listen(10); //设定最多10个排队连接请求 Console.WriteLine("启动监听{0}成功", serverSocket.LocalEndPoint.ToString()); //通过Clientsoket发送数据 Thread myThread = new Thread(ListenClientConnect); myThread.Start(); } public static void Exit() { serverSocket.Close(); serverSocket = null; } private static void ListenClientConnect() { while (true) { if (serverSocket != null) { try { Socket clientSocket = serverSocket.Accept(); Thread receiveThread = new Thread(Create); receiveThread.Start(clientSocket); } catch { break; } } } } public static void Create(object clientSocket) { Socket client = clientSocket as Socket; //获得客户端节点对象 IPEndPoint clientep = (IPEndPoint)client.RemoteEndPoint; //获得[文件名] string SendFileName = System.Text.Encoding.Unicode.GetString(TransferFiles.ReceiveVarData(client)); //检查是否使用本地媒体库 if (SocketServer.useLocal) { //关闭套接字 client.Close(); return; } //获得[包的大小] string bagSize = System.Text.Encoding.Unicode.GetString(TransferFiles.ReceiveVarData(client)); //获得[包的总数量] int bagCount = int.Parse(System.Text.Encoding.Unicode.GetString(TransferFiles.ReceiveVarData(client))); //获得[最后一个包的大小] string bagLast = System.Text.Encoding.Unicode.GetString(TransferFiles.ReceiveVarData(client)); string fullPath = Path.Combine(Environment.CurrentDirectory,SendFileName); //创建一个新文件 FileStream MyFileStream = new FileStream(fullPath, FileMode.Create, FileAccess.Write); //已发送包的个数 int SendedCount = 0; while (true) { byte[] data = TransferFiles.ReceiveVarData(client); if (data.Length == 0) { break; } else { SendedCount++; //将接收到的数据包写入到文件流对象 MyFileStream.Write(data, 0, data.Length); //显示已发送包的个数 } } //关闭文件流 MyFileStream.Close(); //关闭套接字 client.Close(); SocketServer.pForm.ShowMessageBox(SendFileName + "接收完毕！"); } } }
3.Client端
using System; using System.Collections.Generic; using System.Text; using System.IO; using System.Net; using System.Net.Sockets; using System.Diagnostics; namespace Client { public static class FileClient { public static bool SendFile(string IP,int Port,string fullPath) { //创建一个文件对象 FileInfo EzoneFile = new FileInfo(fullPath); //打开文件流 FileStream EzoneStream = EzoneFile.OpenRead(); //包的大小 int PacketSize = 10000; //包的数量 int PacketCount = (int)(EzoneStream.Length / ((long)PacketSize)); //最后一个包的大小 int LastDataPacket = (int)(EzoneStream.Length - ((long)(PacketSize * PacketCount))); //指向远程服务端节点 IPEndPoint ipep = new IPEndPoint(IPAddress.Parse(IP), Port); //创建套接字 Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); //连接到发送端 try { client.Connect(ipep); } catch { Debug.WriteLine("连接服务器失败！"); return false; } //获得客户端节点对象 IPEndPoint clientep = (IPEndPoint)client.RemoteEndPoint; //发送[文件名]到客户端 TransferFiles.SendVarData(client, System.Text.Encoding.Unicode.GetBytes(EzoneFile.Name)); //发送[包的大小]到客户端 TransferFiles.SendVarData(client, System.Text.Encoding.Unicode.GetBytes(PacketSize.ToString())); //发送[包的总数量]到客户端 TransferFiles.SendVarData(client, System.Text.Encoding.Unicode.GetBytes(PacketCount.ToString())); //发送[最后一个包的大小]到客户端 TransferFiles.SendVarData(client, System.Text.Encoding.Unicode.GetBytes(LastDataPacket.ToString())); bool isCut = false; //数据包 byte[] data = new byte[PacketSize]; //开始循环发送数据包 for (int i = 0; i < PacketCount; i++) { //从文件流读取数据并填充数据包 EzoneStream.Read(data, 0, data.Length); //发送数据包 if (TransferFiles.SendVarData(client, data) == 3) { isCut = true; return false; break; } } //如果还有多余的数据包，则应该发送完毕！ if (LastDataPacket != 0) { data = new byte[LastDataPacket]; EzoneStream.Read(data, 0, data.Length); TransferFiles.SendVarData(client, data); } //关闭套接字 client.Close(); //关闭文件流 EzoneStream.Close(); if (!isCut) { return true; } return false; } } }
