C#用WebBrowser与WIN API辅助模拟获取网站完整Cookie

来源：互联网发布：linux sqlite 编辑：程序博客网时间：2024/06/05 06:39

网上找到的可以完整获取Cookie的方法,转载一下希望能帮助更多人. 亲测可用

在Winform中使用WebBrowser控件获取网站的Cookie有时候是不完整的，默认调用Document.Cookie也取不到Cookie，其中就是因为有些网站对于关键Cookie做了保护，为Cookie加上了HttpOnly的属性，HttpOnly可以防止cookie被“读取”，这时我们就需要利用WIN API用来辅助获取网站的完整Cookie了。

using System;using System.ComponentModel;using System.Net;using System.Runtime.InteropServices;using System.Security;using System.Security.Permissions;using System.Text;namespace Freecms{    internal sealed class NativeMethods    {        #region enums             public enum ErrorFlags        {            ERROR_INSUFFICIENT_BUFFER = 122,            ERROR_INVALID_PARAMETER = 87,            ERROR_NO_MORE_ITEMS = 259        }        public enum InternetFlags        {            INTERNET_COOKIE_HTTPONLY = 8192, //Requires IE 8 or higher                 INTERNET_COOKIE_THIRD_PARTY = 131072,            INTERNET_FLAG_RESTRICTED_ZONE = 16        }        #endregion        #region DLL Imports             [SuppressUnmanagedCodeSecurity, SecurityCritical, DllImport("wininet.dll", EntryPoint = "InternetGetCookieExW", CharSet = CharSet.Unicode, SetLastError = true, ExactSpelling = true)]        internal static extern bool InternetGetCookieEx([In] string Url, [In] string cookieName, [Out] StringBuilder cookieData, [In, Out] ref uint pchCookieData, uint flags, IntPtr reserved);        #endregion    }    /// <SUMMARY></SUMMARY>         /// 取得WebBrowser的完整Cookie。         /// 因为默认的webBrowser1.Document.Cookie取不到HttpOnly的Cookie         ///          public class FullWebBrowserCookie    {        [SecurityCritical]        public static string GetCookieInternal(Uri uri, bool throwIfNoCookie)        {            uint pchCookieData = 0;            string url = UriToString(uri);            uint flag = (uint)NativeMethods.InternetFlags.INTERNET_COOKIE_HTTPONLY;            //Gets the size of the string builder                 if (NativeMethods.InternetGetCookieEx(url, null, null, ref pchCookieData, flag, IntPtr.Zero))            {                pchCookieData++;                StringBuilder cookieData = new StringBuilder((int)pchCookieData);                //Read the cookie                     if (NativeMethods.InternetGetCookieEx(url, null, cookieData, ref pchCookieData, flag, IntPtr.Zero))                {                    DemandWebPermission(uri);                    return cookieData.ToString();                }            }            int lastErrorCode = Marshal.GetLastWin32Error();            if (throwIfNoCookie || (lastErrorCode != (int)NativeMethods.ErrorFlags.ERROR_NO_MORE_ITEMS))            {                throw new Win32Exception(lastErrorCode);            }            return null;        }        private static void DemandWebPermission(Uri uri)        {            string uriString = UriToString(uri);            if (uri.IsFile)            {                string localPath = uri.LocalPath;                new FileIOPermission(FileIOPermissionAccess.Read, localPath).Demand();            }            else            {                new WebPermission(NetworkAccess.Connect, uriString).Demand();            }        }        private static string UriToString(Uri uri)        {            if (uri == null)            {                throw new ArgumentNullException("uri");            }            UriComponents components = (uri.IsAbsoluteUri ? UriComponents.AbsoluteUri : UriComponents.SerializationInfoString);            return new StringBuilder(uri.GetComponents(components, UriFormat.SafeUnescaped), 2083).ToString();        }    }}

调用方法(webBrowser1.Url为webBrowser1控件登陆后包含cookie信息的Url)：

string pCookie=Freecms.FullWebBrowserCookie.GetCookieInternal(webBrowser1.Url, false);

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