问NancyFx和Windows身份验证

EN

namespace Blah.App.Security
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Security.Principal;
    using System.Web;

    using Nancy;

    public static class SecurityExtensions
    {
        public static string CurrentUser
        {
            get
            {
                return GetIdentity().Identity.Name;
            }
        }

        public static bool HasRoles(params string[] roles)
        {
            if (HttpContext.Current != null && HttpContext.Current.Request.IsLocal)
            {
                return true;
            }

            var identity = GetIdentity();

            return !roles.Any(role => !identity.IsInRole(role));
        }

        public static void RequiresWindowsAuthentication(this NancyModule module)
        {
            if (HttpContext.Current != null && HttpContext.Current.Request.IsLocal)
            {
                return;
            }

            module.Before.AddItemToEndOfPipeline(
                new PipelineItem<Func<NancyContext, Response>>(
                    "RequiresWindowsAuthentication",
                    ctx =>
                        {
                            var identity = GetIdentity();

                            if (identity == null || !identity.Identity.IsAuthenticated)
                            {
                                return HttpStatusCode.Forbidden;
                            }

                            return null;
                        }));
        }

        public static void RequiresWindowsRoles(this NancyModule module, params string[] roles)
        {
            if (HttpContext.Current != null && HttpContext.Current.Request.IsLocal)
            {
                return;
            }

            module.RequiresWindowsAuthentication();

            module.Before.AddItemToEndOfPipeline(new PipelineItem<Func<NancyContext, Response>>("RequiresWindowsRoles", GetCheckRolesFunction(roles)));
        }

        private static Func<NancyContext, Response> GetCheckRolesFunction(IEnumerable<string> roles)
        {
            return ctx =>
                {
                    var identity = GetIdentity();

                    if (roles.Any(role => !identity.IsInRole(role)))
                    {
                        return HttpStatusCode.Forbidden;
                    }

                    return null;
                };
        }

        private static IPrincipal GetIdentity()
        {
            if (System.Web.HttpContext.Current != null)
            {
                return System.Web.HttpContext.Current.User;
            }

            return new WindowsPrincipal(WindowsIdentity.GetCurrent());
        }

        public static Func<NancyContext, Response> RequireGroupForEdit(string group)
        {
            return ctx =>
                {
                    if (ctx.Request.Method == "GET")
                    {
                        return null;
                    }

                    return HasRoles(group) ? null : (Response)HttpStatusCode.Forbidden;
                };
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Principal;
using System.Web;
using Nancy;
using Nancy.Security;

namespace YourNamespace
{
    /// <summary>
    /// Extensions for Nancy that implement Windows Authentication.
    /// </summary>
    public static class WindowsAuthenticationExtensions
    {
        private class WindowsUserIdentity : IUserIdentity
        {
            private string _userName;

            public WindowsUserIdentity(string userName)
            {
                _userName = userName;
            }

            #region IUserIdentity

            IEnumerable<string> IUserIdentity.Claims
            {
                get { throw new NotImplementedException(); }
            }

            string IUserIdentity.UserName
            {
                get { return _userName; }
            }

            #endregion
        }

        #region Methods

        /// <summary>
        /// Forces the NancyModule to require a user to be Windows authenticated. Non-authenticated
        /// users will be sent HTTP 401 Unauthorized.
        /// </summary>
        /// <param name="module"></param>
        public static void RequiresWindowsAuthentication(this NancyModule module)
        {
            if (HttpContext.Current == null) 
                throw new InvalidOperationException("An HttpContext is required. Ensure that this application is running under IIS.");

            module.Before.AddItemToEndOfPipeline(
                new PipelineItem<Func<NancyContext, Response>>(
                    "RequiresWindowsAuthentication",
                    context =>
                    {
                        var principal = GetPrincipal();

                        if (principal == null || !principal.Identity.IsAuthenticated)
                        {
                            return HttpStatusCode.Unauthorized;
                        }

                        context.CurrentUser = new WindowsUserIdentity(principal.Identity.Name);

                        return null;
                    }));
        }

        private static IPrincipal GetPrincipal()
        {
            if (HttpContext.Current != null)
            {
                return HttpContext.Current.User;
            }

            return new WindowsPrincipal(WindowsIdentity.GetCurrent());
        }

        #endregion

    }
}

public class YourModule : NancyModule
{
    public YourModule()
    {
        this.RequiresWindowsAuthentication();

        Get["/"] = parameters =>
            {
                //...
            };
    }