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Nancy之Forms authentication的简单使用_html/css_WEB-ITnose

WBOYOriginal: 2016-06-21 08:56:571216browse

一、前言

想必大家或多或少都听过微软推出的ASP.NET Identity技术，可以简单的认为就是一种授权的实现

很巧的是，Nancy中也有与之相类似的技术Authentication，这两者之间都用到了一些相通的安全技术

(我没有去看ASP.NET Identity的内部实现，是从它的简单用法中判断的)

正式开始介绍之前先推荐几篇ASP.NET Identity的好文章

r01cn 的 ASP.NET Identity系列教程（目录）

腾飞（Jesse）的 MVC5 - ASP.NET Identity登录原理 - Claims-based认证和OWIN

好了，下面还是用demo的形式来介绍怎么简单使用Forms authentication吧

二、简单使用

1)、新建一个空的asp.net项目

2)、通过NuGet安装相应的包

1       Install-Package Nancy2 　    Install-Package Nancy.Hosting.Aspnet3       Install-Package Nancy.Authentication.Forms4       Install-Package Dapper

由于用到了数据库访问，所以还安装了Dapper

3)、建立数据表

 1 CREATE TABLE [dbo].[SystemUser]( 2     [SystemUserId] [uniqueidentifier] NOT NULL, 3     [SystemUserName] [nvarchar](50) NOT NULL, 4     [SystemUserPassword] [nvarchar](50) NOT NULL, 5  CONSTRAINT [PK_SystemUser] PRIMARY KEY CLUSTERED  6 ( 7     [SystemUserId] ASC 8 )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 9 ) ON [PRIMARY]10 GO

同时像表中插入两条数据

1 INSERT INTO [dbo].[SystemUser]([SystemUserId],[SystemUserName],[SystemUserPassword])2 VALUES(newid(),'catcher','123')3 INSERT INTO [dbo].[SystemUser]([SystemUserId],[SystemUserName],[SystemUserPassword])4 VALUES(newid(),'admin','123')

注：由于是演示，所以密码没有进行加密处理

4)、建立相应的文件夹

Models用于存放模型

Modules用于存放相应的操作

Views用于存放视图

5)、编写模型 SystemUser.cs

1     public class SystemUser2     {3         public Guid SystemUserId { get; set; }4         public string SystemUserName { get; set; }5         public string SystemUserPassword { get; set; }6     }

6)、编写HomeModule.cs

 1 using Dapper; 2 using Nancy; 3 using Nancy.Authentication.Forms; 4 using Nancy.ModelBinding; 5 using NancyDemoForFormsauthentication.Models; 6 using System.Data; 7 using System.Data.SqlClient; 8 using System.Linq; 9 namespace NancyDemoForFormsauthentication.Modules10 {11     public class HomeModule : NancyModule12     {13         public HomeModule()14         {15             Get["/"] = _ =>16             {17                 return View["index"];18             };19             Get["/login"] = _ =>20             {21                 return View["login"];22             };23             Post["/login"] = _ =>24             {25                 var loginUser = this.Bind<SystemUser>();26                 SystemUser user = GetValidUser(loginUser.SystemUserName, loginUser.SystemUserPassword);27                 if (user == null)28                 {29                     return Response.AsText("出错了", "text/html;charset=UTF-8");30                 }31                 return this.LoginAndRedirect(user.SystemUserId, fallbackRedirectUrl: "/secure");32             };33         }34         private readonly string sqlconnection =35                "Data Source=127.0.0.1;Initial Catalog=NancyDemo;User Id=sa;Password=dream_time1314;";36         private SqlConnection OpenConnection()37         {38             SqlConnection connection = new SqlConnection(sqlconnection);39             connection.Open();40             return connection;41         }42         private SystemUser GetValidUser(string name, string pwd)43         {44             using (IDbConnection conn = OpenConnection())45             {46                 const string query = "select * from SystemUser where SystemUserName=@SystemUserName and SystemUserPassword=@SystemUserPassword";47                 return conn.Query<SystemUser>(query, new { SystemUserName = name, SystemUserPassword = pwd }).SingleOrDefault();48             }49         }50     }51 }

其中，登录的post方法中用到了 LoginAndRedirect 这个静态方法

这个方法位于ModuleExtensions.cs中，返回值是Response类型的

1         public static Response LoginAndRedirect(this INancyModule module, Guid userIdentifier, DateTime? cookieExpiry = null, string fallbackRedirectUrl = "/")2         {3             return FormsAuthentication.UserLoggedInRedirectResponse(module.Context, userIdentifier, cookieExpiry, fallbackRedirectUrl);4         }

看方法名都能知道这个是用来干什么的！

还有Response.AsText后面的第二个参数可以让中文不乱码！！

7)、编写相应的视图

index.html

 1 <!DOCTYPE html> 2 <html> 3 <head> 4     <title></title> 5     <meta charset="utf-8" /> 6 </head> 7 <body> 8     <h2>Nancy之基于Forms authentication的简单使用</h2> 9     <p>访问需要权限的页面</p>10     <a href="/secure">secure</a>11 </body>12 </html>

 1 <!DOCTYPE html> 2 <html> 3 <head> 4     <title></title> 5     <meta charset="utf-8" /> 6 </head> 7 <body> 8     <form method="post" action="/login"> 9         <label>姓名：</label><input type="text" name="SystemUserName" /><br />10         <label>密码：</label><input type="password" name="SystemUserPassword" /><br />11         <input type="submit" />12     </form>13 </body>14 </html>

8)、编写SecureModule.cs

 1 using Nancy; 2 using Nancy.Security; 3  4 namespace NancyDemoForFormsauthentication.Modules 5 { 6     public class SecureModule : NancyModule 7     { 8         public SecureModule() 9         {10             this.RequiresAuthentication();11             Get["/secure"] = _ =>12             {13                 return "Hello ," + this.Context.CurrentUser.UserName;14             };15         }16     }17 }

其中

1 this.RequiresAuthentication();

这句是关键！！表明需要验证才能通过。位于Nancy.Security这个命名空间

通过验证访问后会打印出当前的用户名称。

9)、编写Bootstraper.cs

 1 using Nancy; 2 using Nancy.Authentication.Forms; 3 using Nancy.TinyIoc; 4 using Nancy.Bootstrapper; 5 namespace NancyDemoForFormsauthentication 6 { 7     public class Bootstrapper : DefaultNancyBootstrapper 8     { 9         protected override void ConfigureRequestContainer(TinyIoCContainer container, NancyContext context)10         {11             base.ConfigureRequestContainer(container, context);12             container.Register<IUserMapper, UserMapper>();13         }14         protected override void RequestStartup(TinyIoCContainer container, IPipelines pipelines, NancyContext context)15         {16             base.RequestStartup(container, pipelines, context);17             var formsAuthConfiguration = new FormsAuthenticationConfiguration18             {19                 RedirectUrl = "~/login",20                 UserMapper = container.Resolve<IUserMapper>(),21             };22             FormsAuthentication.Enable(pipelines, formsAuthConfiguration);23         }24     }25 }

这里是至关重要的一步！！！

要在RequestStartup中启用我们的FormsAuthentication！！

同时我们还要配置FormsAuthenticationConfiguration

注册了UserMapper，所以我们接下来就是实现UserMapper

10)、编写UserMapper.cs

 1 using Dapper; 2 using Nancy; 3 using Nancy.Authentication.Forms; 4 using Nancy.Security; 5 using NancyDemoForFormsauthentication.Models; 6 using System; 7 using System.Data; 8 using System.Data.SqlClient; 9 using System.Linq;10 namespace NancyDemoForFormsauthentication11 {12     public class UserMapper : IUserMapper13     {14         public IUserIdentity GetUserFromIdentifier(Guid identifier, NancyContext context)15         {16             using (IDbConnection conn = OpenConnection())17             {18                 const string query = "select * from SystemUser where SystemUserId=@SystemUserId";19                 var user = conn.Query<SystemUser>(query, new { SystemUserId = identifier }).SingleOrDefault();20                 if (user == null)21                 {22                     return null;23                 }24                 else25                 {26                     return new UserIdentity27                     {28                         UserName = user.SystemUserName,29                         Claims = new[] { "SystemUser"}30                     };31                 }32             }33         }34         private readonly string sqlconnection =35                 "Data Source=127.0.0.1;Initial Catalog=NancyDemo;User Id=sa;Password=dream_time1314;";36         private SqlConnection OpenConnection()37         {38             SqlConnection connection = new SqlConnection(sqlconnection);39             connection.Open();40             return connection;41         }42     }43 }

UserMapper必须要实现IUserMapper这个接口！同时返回一个实现IUserIdentity接口的对象。

11)、编写UserIdentity.cs

 1 using Nancy.Security; 2 using System.Collections.Generic; 3 namespace NancyDemoForFormsauthentication 4 { 5     public class UserIdentity : IUserIdentity 6     { 7         public string UserName { get; set; } 8         public IEnumerable<string> Claims { get; set; } 9     }10 }

到这里所有的工作都已经做完了，下面就是看看效果了

我们点击 secure链接，发现自动跳转到登录界面了！！

我们输入用户名和密码

登录成功，并返回到secure页面了！

当我们输入错误的用户名和密码时

最后是本次示例代码：

https://github.com/hwqdt/Demos/tree/master/src/NancyDemoForFormsauthentication

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