C#用SOCKET發送HTTP請求小例

1.    
2. 調用處代碼
3.      private void button1_Click(object sender, EventArgs e)
4.         {
5.             string urlStr = this.textUrl.Text ;
7.             if (urlStr == null || "".Equals(urlStr))
8.             {
9.                 MessageBox.Show( "必須填寫要防問的地址！");
10.                 return;
11.             }
13.             int port = 80;
15.             try
16.             {
17.                 port = Convert.ToInt32(this.textPort.Text);
18.             }
19.             catch
20.             {
21.                 MessageBox.Show( "請填寫正確的連接埠");
22.             }
24.             //可以為空白
25.             string path = "/"+this.textFile.Text;
27.             this.textBox1.Text = "";
28.             this.conn.StartAccess(urlStr, port, path, this.textBox1);
29.         }

 

1. using System;
2. using System.Collections.Generic;
3. using System.Linq;
4. using System.Text;
5. using System.Net;
6. using System.Net.Sockets;
7. using System.Windows.Forms;
9. namespace WindowsFormsApplication3
10. {
11.     class MyConnection
12.     {
13.         public void StartAccess( string urlStr ,int port , string path , TextBox list )
14.         {
15.             byte[] data = new byte[1024];
16.             IPHostEntry gist = Dns.GetHostByName( urlStr );
18.             //得到所訪問的網址的IP地址
19.             IPAddress ip = gist.AddressList[0];
20.             IPEndPoint ipEnd = new IPEndPoint(ip, port);
22.             //使用tcp協議 stream類型 （IPV4）
23.             Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
25.             try
26.             {
27.                 socket.Connect(ipEnd);
28.             }
29.             catch (SocketException e)
30.             {
31.                 MessageBox.Show("與訪問的伺服器串連異常!");
32.                 Console.Write(e.ToString());
33.                 return;
34.             }
35.             //這裡請求的相對位址，如果訪問直接www.baidu.com則不需要,可以為空白.
37.             StringBuilder buf = new StringBuilder();
38.             buf.Append("GET ").Append(path).Append(" HTTP/1.0/r/n");
39.             buf.Append("Content-Type: application/x-www-form-urlencoded/r/n");
40.             buf.Append("/r/n");
41.             byte[] ms = System.Text.UTF8Encoding.UTF8.GetBytes(buf.ToString());
43.             //發送
44.             socket.Send(ms);
47.             int recv =0;
48.            
49.             do
50.             {
51.                 recv = socket.Receive(data);
52.                 //如果請求的頁面meta中指定了頁面的encoding為gb2312則需要使用對應的Encoding來對位元組進行轉換
53.                 //list.Text += (Encoding.UTF8.GetString(data, 0, recv));
54.                 list.Text += (Encoding.Default.GetString(data, 0, recv));
56.             } while (recv != 0);
58.             //禁用上次的發送和接受
59.             socket.Shutdown( SocketShutdown.Both );
60.             socket.Close();
61.         }
62.     }
63. }