Question

我要做的是通过其他凭据（模拟）连接到SharePoint列表并打印其项目。

我正在使用this code进行模拟，并且几乎完美无缺，直到执行 clientContext.ExecuteQuery() 。我发现在此命令期间，模拟已过期（实际上这是我需要冒充的关键命令）。

我怎么能克服它？

CredentialsController.Impersonator imp = null;
imp = new CredentialsController.Impersonator("myUsername", "myDomain", "myPassword");

CamlQuery camlQuery = new CamlQuery();
camlQuery.ViewXml = query;
listItemCollection = selectedList.GetItems(camlQuery);
clientContext.Load(listItemCollection);
clientContext.ExecuteQuery(); // ****This line cancels the impersonation****

imp.UndoImpersonation();

注：
要运行下面的代码，您需要：

添加对两个dll的引用（可以下载from here）：

Microsoft.SharePoint.Client.dll
Microsoft.SharePoint.Client.Runtime.dll
确保使用.NET 3.5（目前不高）
在以下行中插入实际值

string siteUrl =“ https://SP_Server.com/sites/some_site/ ”;; string listID =“ 3c84e774-86c4-4b45-8a0a-437526e8728f ”;;
imp = new CredentialsController.Impersonator（“ myUsername ”，“ myDomain ”，“ myPassword ”）;

Console.WriteLine（oListItem [ “的标题”]的ToString（））;

（我在Win 7 64位上使用VS2010终极版）

这是完整的代码：

using System;
using System.Collections.Generic;
using System.Security.Principal;
using System.ComponentModel;
using System.Runtime.InteropServices;
using Microsoft.SharePoint.Client;

namespace WhereAmILoggedIn
{
    class SharePointGetter
    {
        static void Main()
        {
            string siteUrl = "https://SP_Server/sites/some_site/";
            string query = "<View></View>";
            string listID = "3c84e774-86c4-4b45-8a0a-437526e8728f";

            CredentialsController.Impersonator imp = null;
            imp = new CredentialsController.Impersonator("myUsername", "myDomain", "myPassword");

            ListItemCollection listItemCollection;
            try
            {
                Microsoft.SharePoint.Client.ClientContext clientContext = new ClientContext(siteUrl);
                Microsoft.SharePoint.Client.List selectedList = clientContext.Web.Lists.GetById(new Guid(listID));

                CamlQuery camlQuery = new CamlQuery();
                camlQuery.ViewXml = query;
                listItemCollection = selectedList.GetItems(camlQuery);
                clientContext.Load(listItemCollection);

                Console.WriteLine(Convert.ToString(WindowsIdentity.GetCurrent().Name)); //************ Before
                clientContext.ExecuteQuery();
                Console.WriteLine(Convert.ToString(WindowsIdentity.GetCurrent().Name)); //************ After
            }
            catch (Exception)
            {
                throw new Exception("Access denied", new Exception("Are you missing permissions?"));
            }


            foreach (ListItem oListItem in listItemCollection)
            {
                Console.WriteLine(oListItem["Title"].ToString());
            }

            if (imp != null)
                imp.UndoImpersonation();
        }
    }

    class CredentialsController
    {
        public enum LogonType
        {
            LOGON32_LOGON_INTERACTIVE = 2,
            LOGON32_LOGON_NETWORK = 3,
            LOGON32_LOGON_BATCH = 4,
            LOGON32_LOGON_SERVICE = 5,
            LOGON32_LOGON_UNLOCK = 7,
            LOGON32_LOGON_NETWORK_CLEARTEXT = 8, // Win2K or higher
            LOGON32_LOGON_NEW_CREDENTIALS = 9 // Win2K or higher
        };

        public enum LogonProvider
        {
            LOGON32_PROVIDER_DEFAULT = 0,
            LOGON32_PROVIDER_WINNT35 = 1,
            LOGON32_PROVIDER_WINNT40 = 2,
            LOGON32_PROVIDER_WINNT50 = 3
        };

        public enum ImpersonationLevel
        {
            SecurityAnonymous = 0,
            SecurityIdentification = 1,
            SecurityImpersonation = 2,
            SecurityDelegation = 3
        }

        class Win32NativeMethods
        {
            [DllImport("advapi32.dll", SetLastError = true)]
            public static extern int LogonUser(string lpszUserName,
                 string lpszDomain,
                 string lpszPassword,
                 int dwLogonType,
                 int dwLogonProvider,
                 ref IntPtr phToken);

            [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
            public static extern int DuplicateToken(IntPtr hToken,
                  int impersonationLevel,
                  ref IntPtr hNewToken);

            [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
            public static extern bool RevertToSelf();

            [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
            public static extern bool CloseHandle(IntPtr handle);
        }


        public class Impersonator : IDisposable
        {
            private WindowsImpersonationContext _wic;


            public Impersonator(string userName, string domainName, string password, LogonType logonType, LogonProvider logonProvider)
            {
                Impersonate(userName, domainName, password, logonType, logonProvider);
            }

            public Impersonator(string userName, string domainName, string password)
            {
                Impersonate(userName, domainName, password, LogonType.LOGON32_LOGON_INTERACTIVE, LogonProvider.LOGON32_PROVIDER_DEFAULT);
            }

            public Impersonator()
            { }

            public void Dispose()
            {
                UndoImpersonation();
            }

            public void Impersonate(string userName, string domainName, string password)
            {
                Impersonate(userName, domainName, password, LogonType.LOGON32_LOGON_INTERACTIVE, LogonProvider.LOGON32_PROVIDER_DEFAULT);
            }

            public void Impersonate(string userName, string domainName, string password, LogonType logonType, LogonProvider logonProvider)
            {
                UndoImpersonation();

                IntPtr logonToken = IntPtr.Zero;
                IntPtr logonTokenDuplicate = IntPtr.Zero;
                try
                {
                    // revert to the application pool identity, saving the identity of the current requestor
                    _wic = WindowsIdentity.Impersonate(IntPtr.Zero);

                    // do logon & impersonate
                    if (Win32NativeMethods.LogonUser(userName,
                        domainName,
                        password,
                        (int)logonType,
                        (int)logonProvider,
                        ref logonToken) != 0)
                    {
                        if (Win32NativeMethods.DuplicateToken(logonToken, (int)ImpersonationLevel.SecurityImpersonation, ref logonTokenDuplicate) != 0)
                        {
                            var wi = new WindowsIdentity(logonTokenDuplicate);
                            wi.Impersonate(); // discard the returned identity context (which is the context of the application pool)
                        }
                        else
                            throw new Win32Exception(Marshal.GetLastWin32Error());
                    }
                    else
                        throw new Win32Exception(Marshal.GetLastWin32Error());
                }
                finally
                {
                    if (logonToken != IntPtr.Zero)
                        Win32NativeMethods.CloseHandle(logonToken);

                    if (logonTokenDuplicate != IntPtr.Zero)
                        Win32NativeMethods.CloseHandle(logonTokenDuplicate);
                }
            }

            /// Stops impersonation.
            public void UndoImpersonation()
            {
                // restore saved requestor identity
                if (_wic != null)
                    _wic.Undo();
                _wic = null;
            }
        }
    }
}

C＃为什么在执行Microsoft.SharePoint.Client.ClientContext.ExecuteQuery（）时模拟已过期

0 个答案: