IUrlHistoryStg2 :: ClearHistory（）无法通过服务运行吗？ [英] IUrlHistoryStg2::ClearHistory() does not work from a service?

问题描述

IUrlHistoryStg2 :: ClearHistory（）方法被记录为按用户。

The IUrlHistoryStg2::ClearHistory() method is documented as Per-User.

http://msdn.microsoft.com/zh-cn/library/aa767715（VS.85）.aspx

从以SYSTEM帐户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，但对ClearHistory（）的调用始终返回0表示成功，但不会清除用户的历史记录。

When calling it from a service running under the SYSTEM account, I am unable to target particular logged-on users. I have successfully impersonated the users via WindowsIdentity.Impersonate() but the call to ClearHistory() always returns 0 for success but does not clear the history of the user.

这在XP和Win7上都适用，因此似乎不是会话隔离问题。

This applies on both XP and Win7 so appears to be not a session isolation issue.

也许是因为它是COM，所以有人在查看调用方的Process令牌，而不是其调用方

Perhaps because it is COM, something is looking at the Process token of the caller rather than its Thread token when impersonating?

我感到困惑的是，为什么模拟用户并不能简单地导致这种方法的成功？

I am confused why impersonating the user does not simply lead to success of this method?

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();
    }
}

推荐答案

如果服务或应用程序冒充用户，则系统不会加载用户的个人资料。尝试先致电 LoadUserProfile 。

If a service or an application impersonates a user, the system does not load the user's profile. Try call LoadUserProfile first.

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