webBrowser1.Document.Cookie取不到HttpOnly的Cookie，取Cookie不完整【转】

在做数据采集时，有些网站需要输入验证码，但各网站验证码都不同，不可能有完美的识别验证码的代码，所以我也没去研究，我所采取的方案是：在winform里通过WebBrowser调用网页先手动登录系统，然后再通过webBrowser1.Document.Cookie获取其Cookie，再将其用到HttpWebRequest里用来访问自己需要的页。

一直用的都没有问题，但最近在对一个网站操作时总是不能获取完整Cookie，百思不得其解，使用Fiddler2对比发现，不能获取到的Cookie里最后有一个HttpOnly的标识，顺藤摸瓜发现原来webBrowser1.Document.Cookie里是取不到HttpOnly的Cookie的，也找到解决方法：

  1 using System;   
  2 using System.ComponentModel;   
  3 using System.Net;   
  4 using System.Runtime.InteropServices;   
  5 using System.Security;   
  6 using System.Security.Permissions;   
  7 using System.Text;   
  8   
  9   
 10 internal sealed class NativeMethods   
 11 {  
 12     #region enums   
 13   
 14     public enum ErrorFlags   
 15     {   
 16         ERROR_INSUFFICIENT_BUFFER = 122,   
 17         ERROR_INVALID_PARAMETER = 87,   
 18         ERROR_NO_MORE_ITEMS = 259   
 19     }   
 20   
 21     public enum InternetFlags   
 22     {   
 23         INTERNET_COOKIE_HTTPONLY = 8192, //Requires IE 8 or higher   
 24         INTERNET_COOKIE_THIRD_PARTY = 131072,   
 25         INTERNET_FLAG_RESTRICTED_ZONE = 16   
 26     }  
 27  
 28     #endregion  
 29  
 30     #region DLL Imports   
 31   
 32     [SuppressUnmanagedCodeSecurity, SecurityCritical, DllImport("wininet.dll", EntryPoint = "InternetGetCookieExW", CharSet = CharSet.Unicode, SetLastError = true, ExactSpelling = true)]   
 33     internal static extern bool InternetGetCookieEx([In] string Url, [In] string cookieName, [Out] StringBuilder cookieData, [In, Out] ref uint pchCookieData, uint flags, IntPtr reserved);  
 34  
 35     #endregion   
 36 }   
 37   
 38   
 39 /// <SUMMARY></SUMMARY>   
 40 /// 取得WebBrowser的完整Cookie。   
 41 /// 因为默认的webBrowser1.Document.Cookie取不到HttpOnly的Cookie   
 42 ///    
 43 public class FullWebBrowserCookie   
 44 {   
 45   
 46     [SecurityCritical]   
 47     public static string GetCookieInternal(Uri uri, bool throwIfNoCookie)   
 48     {   
 49         uint pchCookieData = 0;   
 50         string url = UriToString(uri);   
 51         uint flag = (uint)NativeMethods.InternetFlags.INTERNET_COOKIE_HTTPONLY;   
 52   
 53         //Gets the size of the string builder   
 54         if (NativeMethods.InternetGetCookieEx(url, null, null, ref pchCookieData, flag, IntPtr.Zero))   
 55         {   
 56             pchCookieData++;   
 57             StringBuilder cookieData = new StringBuilder((int)pchCookieData);   
 58   
 59             //Read the cookie   
 60             if (NativeMethods.InternetGetCookieEx(url, null, cookieData, ref pchCookieData, flag, IntPtr.Zero))   
 61             {   
 62                 DemandWebPermission(uri);   
 63                 return cookieData.ToString();   
 64             }   
 65         }   
 66   
 67         int lastErrorCode = Marshal.GetLastWin32Error();   
 68   
 69         if (throwIfNoCookie || (lastErrorCode != (int)NativeMethods.ErrorFlags.ERROR_NO_MORE_ITEMS))   
 70         {   
 71             throw new Win32Exception(lastErrorCode);   
 72         }   
 73   
 74         return null;   
 75     }   
 76   
 77     private static void DemandWebPermission(Uri uri)   
 78     {   
 79         string uriString = UriToString(uri);   
 80   
 81         if (uri.IsFile)   
 82         {   
 83             string localPath = uri.LocalPath;   
 84             new FileIOPermission(FileIOPermissionAccess.Read, localPath).Demand();   
 85         }   
 86         else  
 87         {   
 88             new WebPermission(NetworkAccess.Connect, uriString).Demand();   
 89         }   
 90     }   
 91   
 92     private static string UriToString(Uri uri)   
 93     {   
 94         if (uri == null)   
 95         {   
 96             throw new ArgumentNullException("uri");   
 97         }   
 98   
 99         UriComponents components = (uri.IsAbsoluteUri ? UriComponents.AbsoluteUri : UriComponents.SerializationInfoString);   
100         return new StringBuilder(uri.GetComponents(components, UriFormat.SafeUnescaped), 2083).ToString();   
101     }   
102 }

View Code