Question

我在编写PowerPivot要使用的安全WCF数据服务时遇到了一些麻烦。该服务运行正常，我可以毫不费力地使用PowerPivot中的数据。

我的问题是，当我在PowerPivot中输入数据Feed的用户ID和密码时（在数据Feed高级设置中），我似乎无法从WCF服务内部获取任何访问权限。我想使用用户ID和密码来对数据库进行身份验证，但我需要先了解它们。：）

有没有关于如何专门为PowerPivot编写安全WCF数据服务的好例子？

非常感谢。

Answer 1

我正在努力做同样的事情，经过一些研究发现这篇博文让我感动：

http://pfelix.wordpress.com/2011/04/21/wcf-web-api-self-hosting-https-and-http-basic-authentication/

简而言之，您需要做一些工作才能让Principal流向服务调用。

Answer 2

MSDN上有完整的可下载样本

使用PowerPivot客户端基本身份验证的WCF数据服务

https://code.msdn.microsoft.com/office/WCF-Data-Service-with-547e9341

更新

好的，现在我已经使用了链接中的代码（我在发布时正在研究）我知道它有用，所以这里是代码示例：

步骤1：编写HTTP处理程序以处理所有请求并执行身份验证（或发出401质询）。

namespace WebHostBasicAuth.Modules
{
    public class BasicAuthHttpModule : IHttpModule
    {
        private const string Realm = "My Realm";

        public void Init(HttpApplication context)
        {
            // Register event handlers
            context.AuthenticateRequest += OnApplicationAuthenticateRequest;
            context.EndRequest += OnApplicationEndRequest;
        }

        private static void SetPrincipal(IPrincipal principal)
        {
            Thread.CurrentPrincipal = principal;
            if (HttpContext.Current != null)
            {
                HttpContext.Current.User = principal;
            }
        }

        // TODO: Here is where you would validate the username and password.
        private static bool CheckPassword(string username, string password)
        {
            return username == "user" && password == "password";
        }

        private static void AuthenticateUser(string credentials)
        {
            try
            {
                var encoding = Encoding.GetEncoding("iso-8859-1");
                credentials = encoding.GetString(Convert.FromBase64String(credentials));

                int separator = credentials.IndexOf(':');
                string name = credentials.Substring(0, separator);
                string password = credentials.Substring(separator + 1);

                if (CheckPassword(name, password))
                {
                    var identity = new GenericIdentity(name);
                    SetPrincipal(new GenericPrincipal(identity, null));
                }
                else
                {
                    // Invalid username or password.
                    HttpContext.Current.Response.StatusCode = 401;
                }
            }
            catch (FormatException)
            {
                // Credentials were not formatted correctly.
                HttpContext.Current.Response.StatusCode = 401;
            }
        }

        private static void OnApplicationAuthenticateRequest(object sender, EventArgs e)
        {
            var request = HttpContext.Current.Request;
            var authHeader = request.Headers["Authorization"];
            if (authHeader != null)
            {
                var authHeaderVal = AuthenticationHeaderValue.Parse(authHeader);

                // RFC 2617 sec 1.2, "scheme" name is case-insensitive
                if (authHeaderVal.Scheme.Equals("basic",
                        StringComparison.OrdinalIgnoreCase) &&
                    authHeaderVal.Parameter != null)
                {
                    AuthenticateUser(authHeaderVal.Parameter);
                }
            }
        }

        // If the request was unauthorized, add the WWW-Authenticate header 
        // to the response.
        private static void OnApplicationEndRequest(object sender, EventArgs e)
        {
            var response = HttpContext.Current.Response;
            if (response.StatusCode == 401)
            {
                response.Headers.Add("WWW-Authenticate",
                    string.Format("Basic realm=\"{0}\"", Realm));
            }
        }

        public void Dispose() 
        {
        }
    }
}

步骤2：通过web.config配置新的处理程序。

  <system.webServer>
    <modules>
      <add name="BasicAuthHttpModule" 
        type="WebHostBasicAuth.Modules.BasicAuthHttpModule, YourAssemblyName"/>
    </modules>
  ...

对Excel PowerPivot很重要

请参阅此错误：PowerPivot not sending Authorization header in Basic Authentication to OData Svc

为Excel PowerPivot编写安全的WCF数据服务

2 个答案: