C# Socket編程

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using System;using System.IO;using System.Net;using System.Net.Sockets;using System.Text;namespace ConsoleApplication2{    public class Program    {        public static void Main(string[] args)        {            //取得預儲存的檔案名稱             string fileName = "index.html";            //遠程主機             string hostName = "www.baidu.com";            //連接埠             int port = 80;            //得到主機資訊             IPHostEntry ipInfo = Dns.GetHostByName(hostName);            //取得IPAddress[]             IPAddress[] ipAddr = ipInfo.AddressList;            //得到ip             IPAddress ip = ipAddr[0];            //組合出遠程終結點             IPEndPoint hostEP = new IPEndPoint(ip, port);            //建立Socket 執行個體             Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);            try            {                //嘗試串連                 socket.Connect(hostEP);            }            catch (Exception se)            {                Console.WriteLine(se.Message);            }            //發送給遠程主機的請求內容串             string sendStr = "GET / HTTP/1.1\r\nHost: " + hostName +            "\r\nConnection: Close\r\n\r\n";            //建立bytes位元組數組以轉換髮送串             byte[] bytesSendStr = new byte[1024];            //將發送內容字串轉換成位元組byte數組             bytesSendStr = Encoding.ASCII.GetBytes(sendStr);            try            {                //向主機發送請求                 socket.Send(bytesSendStr, bytesSendStr.Length, 0);            }            catch (Exception ce)            {                Console.WriteLine(ce.Message);            }            //聲明接收返回內容的字串             string recvStr = "";            //聲明位元組數組，一次接收資料的長度為1024位元組             byte[] recvBytes = new byte[1024];            //返回實際接收內容的位元組數             int bytes = 0;            //迴圈讀取，直到接收完所有資料             while (true)            {                bytes = socket.Receive(recvBytes, recvBytes.Length, 0);                //讀取完成後退出迴圈                 if (bytes <= 0)                    break;                //將讀取的位元組數轉換為字串                 recvStr += Encoding.ASCII.GetString(recvBytes, 0, bytes);            }            //將所讀取的字串轉換為位元組數組             byte[] content = Encoding.ASCII.GetBytes(recvStr);            try            {                //建立檔案流對象執行個體                 FileStream fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite);                //寫入檔案                 fs.Write(content, 0, content.Length);            }            catch (Exception fe)            {                Console.WriteLine(fe.Message);            }            //禁用Socket             socket.Shutdown(SocketShutdown.Both);            //關閉Socket             socket.Close();        }    }}

 

C# Socket編程