C#使用SOCKET获取ASPSESSIONID、PHPSESSID等Cookie

1 using System;
 2 using System.Collections.Generic;
 3 using System.Text;
 4 using System.Net;
 5 using System.Net.Sockets;
 6 
 7 namespace EatOrange
 8 {
 9     // 使用SOCKET获取Cookie信息
10     class CookieGet
11     {
12         private Socket socket;
13 
14         public string GetCookie(string strHost, string strGet, string strReferer)
15         {
16             IPEndPoint hostEndPoint;
17             IPAddress[] hostAddresses;
18             StringBuilder stringBuilder = new StringBuilder();
19             byte[] byteSend;
20 
21             // 首先构造HTTP请求头
22             stringBuilder.Append("GET " + strGet + " HTTP/1.1\r\n");
23             stringBuilder.Append("Accept: */*\r\n");
24             stringBuilder.Append("Referer: " + strReferer + "\r\n");
25             stringBuilder.Append("Accept-Language: zh-CN\r\n");
26             stringBuilder.Append("User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:11.0) Gecko/20100101 Firefox/11.0");
27             stringBuilder.Append("Host: " + strHost + "\r\n");
28             stringBuilder.Append("Connection: Keep-Alive\r\n\r\n");
29 
30             byteSend = System.Text.Encoding.ASCII.GetBytes(stringBuilder.ToString());
31 
32             // 利用SOCKET发送HTTP协议
33             int conPort = 80;
34 
35             // 获取DNS服务器信息
36             hostAddresses = Dns.GetHostAddresses(strHost);
37 
38             // 给每个IP发送get请求(因为一个域名可能对应多个IP地址)
39             foreach (IPAddress addr in hostAddresses)
40             {
41                 hostEndPoint = new IPEndPoint(addr, conPort);
42 
43                 socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
44                 socket.Connect(hostEndPoint);
45 
46                 if (socket.Connected)
47                 {
48                     socket.Send(byteSend, byteSend.Length, 0);
49                 }
50             }
51             // 获取服务器的返回信息
52             Byte[] byteReceive = new Byte[1024];
53             Int32 bytes = socket.Receive(byteReceive);
54 
55             string str = Encoding.Default.GetString(byteReceive, 0, bytes);
56 
57             // 获取Cookie信息
58 
59             int pos1, pos2;
60             pos1 = str.IndexOf("Set-Cookie: ") + 12;            // 12 is the length of "Set-Cookie: "
61 
62             if (pos1 == -1)
63                 return "<Error>Not Found</Error>";
64 
65             pos2 = str.IndexOf("\r\n", pos1);
66 
67             return str.Substring(pos1, pos2 - pos1);
68         }
69     }
70 }