IUrlHistoryStg2::ClearHistory() 方法记录为 Per-User。
http://msdn.microsoft.com/en-us/library/aa767715(VS.85).aspx
从 SYSTEM 帐户下运行的服务调用它时,我无法定位特定的登录用户。我已经通过 WindowsIdentity.Impersonate() 成功模拟了用户,但是对 ClearHistory() 的调用总是返回 0 表示成功,但不会清除用户的历史记录。
这适用于 XP 和 Win7,因此似乎不是会话隔离问题。
也许是因为它是 COM,所以在模拟时正在查看调用者的 Process 令牌而不是其 Thread 令牌?
我很困惑为什么冒充用户并不能简单地导致这种方法的成功?
using System;
using System.Runtime.InteropServices;
/**
* wrapper for IUrlHistory
*/
public struct STATURL
{
public static uint SIZEOF_STATURL = (uint)Marshal.SizeOf( typeof(STATURL) );
public uint cbSize;
[MarshalAs(UnmanagedType.LPWStr)] public string pwcsUrl;
[MarshalAs(UnmanagedType.LPWStr)] public string pwcsTitle;
public System.Runtime.InteropServices.ComTypes.FILETIME
ftLastVisited,
ftLastUpdated,
ftExpires;
public uint dwFlags;
}
[ComImport, Guid("3C374A42-BAE4-11CF-BF7D-00AA006946EE"),
InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface IEnumSTATURL
{
[PreserveSig]
uint Next(uint celt, out STATURL rgelt, out uint pceltFetched);
void Skip(uint celt);
void Reset();
void Clone(out IEnumSTATURL ppenum);
void SetFilter(
[MarshalAs(UnmanagedType.LPWStr)] string poszFilter,
uint dwFlags);
}
[ComImport, Guid("AFA0DC11-C313-11d0-831A-00C04FD5AE38"),
InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface IUrlHistoryStg2
{
#region IUrlHistoryStg methods
void AddUrl(
[MarshalAs(UnmanagedType.LPWStr)] string pocsUrl,
[MarshalAs(UnmanagedType.LPWStr)] string pocsTitle,
uint dwFlags);
void DeleteUrl(
[MarshalAs(UnmanagedType.LPWStr)] string pocsUrl,
uint dwFlags);
void QueryUrl(
[MarshalAs(UnmanagedType.LPWStr)] string pocsUrl,
uint dwFlags,
ref STATURL lpSTATURL);
void BindToObject(
[MarshalAs(UnmanagedType.LPWStr)] string pocsUrl,
ref Guid riid,
[MarshalAs(UnmanagedType.IUnknown)] out object ppvOut);
IEnumSTATURL EnumUrls();
#endregion
void AddUrlAndNotify(
[MarshalAs(UnmanagedType.LPWStr)] string pocsUrl,
[MarshalAs(UnmanagedType.LPWStr)] string pocsTitle,
uint dwFlags,
[MarshalAs(UnmanagedType.Bool)] bool fWriteHistory,
[MarshalAs(UnmanagedType.IUnknown)] object /*IOleCommandTarget*/
poctNotify,
[MarshalAs(UnmanagedType.IUnknown)] object punkISFolder);
void ClearHistory();
}
[ComImport, Guid("3C374A40-BAE4-11CF-BF7D-00AA006946EE")]
public class UrlHistory /* : IUrlHistoryStg[2] */ {}
public class test
{
static void Main()
{
IUrlHistoryStg2 stg = (IUrlHistoryStg2) new UrlHistory();
stg.ClearHistory();
}
}