Nancy之Forms验证
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Nancy之Forms验证
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授权几乎是所以系统都不可或缺的部分,在Nancy中怎么授权呢?我们这篇博文来说一下Nancy的Forms授权。
首先在NuGet上安装Nancy.Authentication.Forms
Nancy的Forms验证得实现IUserMapper接口,用户类实现IUserIdentity接口(为了方便,我把DB的User,Model的User全合成一个User)
User.cs
using Nancy.Security; using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;namespace TestSelfHostWeb {public class User : IUserIdentity{public User(){}public User(string userName){UserName = userName;}/// <summary>/// 实现接口的成员/// </summary>public string UserName{get;set;}public string Password{get;set;}public string Role{get;set;}/// <summary>/// 这个是Nancy授权中必须的/// </summary>public Guid GUID{get;set;}/// <summary>/// 实现接口的成员/// </summary>public IEnumerable<string> Claims{get;set;}} }UserMapper.cs
using Nancy.Authentication.Forms; using System; using System.Collections.Generic; using System.Linq; using Nancy; using Nancy.Security;namespace TestSelfHostWeb {class UserMapper : IUserMapper{//这个用户集合可以来自数据库static List<User> _users;static UserMapper(){//初始化验用户数据_users = new List<User>();_users.Add(new User() { UserName = "aaa", Password = "111111", GUID = new Guid("33e67c06-ed6e-4bd7-a5b0-60ee0fea890c"), Role = "admin" });_users.Add(new User() { UserName = "bbb", Password = "222222", GUID = new Guid("fba4be7d-25af-416e-a641-a33174f435d1"), Role = "user" });}/// <summary>/// 实现接口的成员,获取用户的角色,以便验证授权/// </summary>/// <param name="identifier"></param>/// <param name="context"></param>/// <returns></returns>public IUserIdentity GetUserFromIdentifier(Guid identifier, NancyContext context){var user = _users.FirstOrDefault(u => u.GUID == identifier);return user == null? null: new User(user.UserName) { Claims = new string[] { user.Role } };}/// <summary>/// 验证用户,验证成功返回用户的GUID,这是规定/// </summary>/// <param name="userName"></param>/// <param name="password"></param>/// <returns></returns>public static Guid? ValidateUser(string userName, string password){var user = _users.FirstOrDefault(u => u.UserName == userName && u.Password == password);if (user == null){return null;}return user.GUID;}} }Bootstrapper.cs
using Nancy; using Nancy.Bootstrapper; using Nancy.TinyIoc; using Nancy.Authentication.Forms;namespace TestSelfHostWeb {public class Bootstrapper : DefaultNancyBootstrapper{protected override void RequestStartup(TinyIoCContainer container, IPipelines pipelines, NancyContext context){base.RequestStartup(container, pipelines, context);//验证配置文件var formsAuthConfiguration = new FormsAuthenticationConfiguration(){RedirectUrl = "~/login",//无验证跳转的路由UserMapper = container.Resolve<IUserMapper>()//用户对应的Mapper};//开启验证FormsAuthentication.Enable(pipelines, formsAuthConfiguration);}} }
Login.cs
using Nancy; using Nancy.Authentication.Forms; using Nancy.ModelBinding; using System;namespace TestSelfHostWeb.Modules {public class LoginModule : NancyModule{public LoginModule(){Get["/login"] = parameters =>{//用户名和密码验证失败的标识ViewBag["error"] = Request.Query.error;return View["login"];};Post["/login"] = parameters =>{var user = this.Bind<User>();var guid= UserMapper.ValidateUser(user.UserName, user.Password);if (guid == null){//按用户名密码查询不到时作的标识return this.LogoutAndRedirect("~/login?error=true");}DateTime? expiry = null;//登录后跳转页面,必需用户的GUIDreturn this.LoginAndRedirect(guid.Value, expiry);};}} }login.cshtml
@inherits Nancy.ViewEngines.Razor.NancyRazorViewBase<TestSelfHostWeb.User> <!DOCTYPE html> <html lang="en"> <head><meta charset="utf-8" /><title>Login</title><style type="text/css">body {text-align: center;}</style> </head> <body><form action="\Login" method="post">UserName:<input id="UserName" name="UserName" type="text" />Password:<input id="Password" name="Password" type="password" /><input type="submit" value="Login" />@if (ViewBag["error"]){<font color="red">check username or password please</font>}</form> </body> </html>Index.cs
using Nancy; using Nancy.Security;namespace TestSelfHostWeb.Modules {public class IndexModule : NancyModule{public IndexModule(){//开启全局验证this.RequiresAuthentication();Get["/"] = parameters =>{//开启角色验证,只有该角色可以访问本路由this.RequiresClaims("admin");return View["index"];};}} }Index.cshtml同上篇的indexx.cshtml
到了test的时刻了
启动host(注意以管理员身份运行)
访问网站的主页,如下图,会跳转到登记页,这是因为index.cs的IndexModule中开启了this.RequiresAuthentication()验证,为什么会跳转到login路由中呢,是因为Bootstrapper中formAuthConfiguration中的RedirectUrl设置。
如果用户名或密码错误 ,会得到提示:
如果用户名密码正确:
如果不具备权限的人(UserName:bbb,Passowrd:222222)登录,会报403错误(这个不太友下,下篇博客解决)
这样就能轻量级的按解色来授权我们的系统了。
总结
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