从 WebBrowser 获取完整的 cookie 列表

如何解决从 WebBrowser 获取完整的 cookie 列表

我正在尝试在 C# WebBrowser 控件中获取请求后存储的完整 cookie 列表。代码如下：

using System;
using System.Runtime.InteropServices;
using System.Text;

namespace WindowsFormsApplication1
{
    public class ExtractHttpOnlyCookie
    {
        [DllImport("wininet.dll",CharSet = CharSet.Auto,SetLastError = true)]
        static extern bool InternetGetCookieEx(string pchURL,string pchCookieName,StringBuilder pchCookieData,ref uint pcchCookieData,int dwFlags,IntPtr lpReserved);
        const int INTERNET_COOKIE_HTTPONLY = 0x00002000;

        public static string GetGlobalCookies(string url)
        {
            uint datasize = 100000;
            StringBuilder data = new StringBuilder((int)datasize);

            if (InternetGetCookieEx(url,null,data,ref datasize,INTERNET_COOKIE_HTTPONLY,IntPtr.Zero) && data.Length > 0)
                return data.ToString();
            else
                return null;
        }

    }
}

这不起作用。与 Fiddler 的输出相比，缺少许多 cookie。还有其他方法吗？我检查了 WebBrowser 上的每个属性和方法，但没有任何用处。您提供的任何信息将不胜感激。谢谢。

附录

我认为页面上的 JS 可能会在页面加载后添加更多 cookie。这是相当复杂的脚本，所以我还没有分析它。但是我注入了一个函数来运行 document.cookie 并且输出与 wininet.dll 返回的相同。那么情况可能并非如此？如果有帮助，可以提供页面内容和 cookie 数据。

解决方法

根据@Jimi 的建议，这里有一些获取缓存信息的代码。请注意，它会获取所有内容，如果您想要来自特定站点的 cookie 或缓存条目，则必须过滤该列表。

public class ExtractHttpOnlyCookie
{
    [DllImport("wininet.dll",CharSet = CharSet.Auto,SetLastError = true)]
    static extern bool InternetGetCookieEx(string pchURL,string pchCookieName,StringBuilder pchCookieData,ref uint pcchCookieData,int dwFlags,IntPtr lpReserved);

    [DllImport("wininet.dll",SetLastError = true)]
    public static extern bool InternetGetCookie(string url,string cookieName,StringBuilder cookieData,ref int size);

    [DllImport("wininet.dll",SetLastError = true,EntryPoint = "FindFirstUrlCacheEntryA",CallingConvention = CallingConvention.StdCall)]
    public static extern IntPtr FindFirstUrlCacheEntry([MarshalAs(UnmanagedType.LPTStr)] string lpszUrlSearchPattern,IntPtr lpFirstCacheEntryInfo,ref int lpdwFirstCacheEntryInfoBufferSize);

    [DllImport("wininet.dll",CharSet = CharSet.Auto)]
    public static extern bool FindNextUrlCacheEntry(IntPtr hEnumHandle,IntPtr lpNextCacheEntryInfo,ref int lpdwNextCacheEntryInfoBufferSize);

    [DllImport("wininet.dll")]
    public static extern bool FindCloseUrlCache(IntPtr hEnumHandle);

    const int INTERNET_COOKIE_HTTPONLY = 0x00002000;
    const int INTERNET_COOKIE_THIRD_PARTY = 0x10;
    const int INTERNET_FLAG_RESTRICTED_ZONE = 0x00020000;
    const int ERROR_INSUFFICIENT_BUFFER = 0x7A;
    const int ERROR_NO_MORE_ITEMS = 0x103;

    [StructLayout(LayoutKind.Sequential,CharSet = CharSet.Auto)]
    public struct INTERNET_CACHE_ENTRY_INFO
    {
        public int dwStructSize;
        [MarshalAs(UnmanagedType.LPTStr)] public String lpszSourceUrlName;
        [MarshalAs(UnmanagedType.LPTStr)] public String lpszLocalFileName;
        public int CacheEntryType;
        public int dwUseCount;
        public int dwHitRate;
        public int dwSizeLow;
        public int dwSizeHigh;
        public System.Runtime.InteropServices.ComTypes.FILETIME LastModifiedTime;
        public System.Runtime.InteropServices.ComTypes.FILETIME ExpireTime;
        public System.Runtime.InteropServices.ComTypes.FILETIME LastAccessTime;
        public System.Runtime.InteropServices.ComTypes.FILETIME LastSyncTime;
        public IntPtr lpHeaderInfo;
        public int dwHeaderInfoSize;
        public IntPtr lpszFileExtension;
        public int dwExemptDelta;
    }

    public static string GetGlobalCookies(string url)
    {
        //uint datasize = 100000;
        //StringBuilder data = new StringBuilder((int)datasize);

        //if (InternetGetCookieEx(url,null,data,ref datasize,INTERNET_COOKIE_HTTPONLY,IntPtr.Zero) && data.Length > 0)
        //    return data.ToString();
        //else
        //    return null;

        int bufferSize = 0;
        FindFirstUrlCacheEntry("cookie:",IntPtr.Zero,ref bufferSize);
        int lastBufferSize = bufferSize;
        IntPtr bufferHandle = Marshal.AllocHGlobal(lastBufferSize);
        IntPtr handle = FindFirstUrlCacheEntry("cookie:",bufferHandle,ref bufferSize);
        bool continueFlag = true;
        List<INTERNET_CACHE_ENTRY_INFO> cacheItemList = new List<INTERNET_CACHE_ENTRY_INFO>();
        INTERNET_CACHE_ENTRY_INFO cacheItem;
        Type itemType = typeof(INTERNET_CACHE_ENTRY_INFO);

        while (continueFlag)
        {
            cacheItem = (INTERNET_CACHE_ENTRY_INFO)Marshal.PtrToStructure(bufferHandle,itemType);
            cacheItemList.Add(cacheItem);

            bufferSize = lastBufferSize;
            continueFlag = FindNextUrlCacheEntry(handle,ref bufferSize);

            if (Marshal.GetLastWin32Error() == ERROR_NO_MORE_ITEMS)
                break;

            if (bufferSize > lastBufferSize)
            {
                lastBufferSize = bufferSize;
                bufferHandle = Marshal.ReAllocHGlobal(bufferHandle,(IntPtr)lastBufferSize);
                continueFlag = true;
            }
        }

        FindCloseUrlCache(handle);
        Marshal.FreeHGlobal(bufferHandle);

        return "";//put output here
    }

}