.NET 2.0 Framework 快速傳輸檔案的方法

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.IO;

namespace TestSendFile
{
    class Program
    {
        static void Main(string[] args)
        {
            if (args.Length == 0)
            {
                ShowHelp();
                return;
            }
            switch (args[0])
            {
                case "server":
                    Socket serversocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                    IPEndPoint serverip = new IPEndPoint(IPAddress.Any, 9888);
                    serversocket.Bind(serverip);
                    serversocket.Listen(10); // max 10 pending connection.
                    Console.WriteLine("press Ctrl-C to stop");
                    while(true)
                    {
                        Socket newconnection = serversocket.Accept();
                        DateTime beginreceive = DateTime.Now;
                        // receive file then close.
                        string filename = Guid.NewGuid().ToString() + ".dat";
                        Console.WriteLine("Begin receiving " + filename);
                        using (FileStream fs = new FileStream(filename, FileMode.Create))
                        {
                            byte[] buffer = new byte[4096];
                            while (true)
                            {
                                int readbytes = newconnection.Receive(buffer);
                                if (readbytes == 0)
                                    break;
                                fs.Write(buffer, 0, readbytes);
                            }
                            newconnection.Close();
                            Console.WriteLine(filename + " transfered , cost " + (DateTime.Now - beginreceive).ToString());
                        }
                    }
                case "client":
                    IPHostEntry hostInfo = Dns.GetHostEntry(args[1]);
                    IPAddress hostip = null;
                    foreach (IPAddress ips in hostInfo.AddressList)
                    {
                        if (ips.AddressFamily == AddressFamily.InterNetwork)
                        {
                            hostip = ips;
                            break;
                        }
                    }
                    IPEndPoint host = new IPEndPoint(hostip, 9888);
                    Socket clientsocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                    clientsocket.Connect(host);
                    clientsocket.SendFile(args[2]);
                    clientsocket.Close();
                    break;
            }
        }

        static void ShowHelp()
        {
            Console.WriteLine("TestSendFile server");
            Console.WriteLine("TestSendFile client [servername] [send filename]");
        }
    }
}