Nancy之Forms authentication的简单使用
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 Nancy 2 Install-Package Nancy.Hosting.Aspnet 3 Install-Package Nancy.Authentication.Forms 4 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 SystemUser 2 { 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.Modules 10 { 11 public class HomeModule : NancyModule 12 { 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>
login.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 FormsAuthenticationConfiguration 18 { 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 NancyDemoForFormsauthentication 11 { 12 public class UserMapper : IUserMapper 13 { 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 else 25 { 26 return new UserIdentity 27 { 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