验证流程
一、用户登录
1、验证表单:ModelState.IsValid
2、验证用户名和密码:通过查询数据库验证
3、如果用户名和密码正确,则在客户端保存Cookie以保存用户登录状态:SetAuthCookie
1):从数据库中查出用户名和一些必要的信息,并把额外信息保存到UserData中
2):把用户名和UserData保存到 FormsAuthenticationTicket 票据中
3):对票据进行加密 Encrypt
4):将加密后的票据保存到Cookie发送到客户端
4、跳转到登录前的页面
5、如果登录失败,返回当前视图
二、验证登录
1、在Global中注册PostAuthenticateRequest事件函数,用于解析客户端发过来的Cookie数据
1):通过 HttpContext.Current.User.Identity 判断用户是否登录(FormsIdentity,IsAuthenticated,AuthenticationType)
2):从HttpContext 的Request的Cookie中解析出Value,解密得到 FormsAuthenticationTicket 得到UserData
2、角色验证
1):在Action加入 Authorize特性,可以进行角色验证
2):在 HttpContext.Current.User 的 IsInRole 方法进行角色认证(需要重写)
一、用户登录
1、设置web.config
设置重定向登录页面
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< system.web >
< authentication mode = "Forms" >
< forms name = "loginName" loginUrl = "/UserInfo/login" cookieless = "UseCookies" path = "/" protection = "All" timeout = "30" ></ forms >
</ authentication >
</ system.web >
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注释掉
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< modules >
<!--<remove name="FormsAuthentication" />-->
</ modules >
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2、登陆的验证中控制器
控制器中加“[Authorize]”修饰的方法拒绝匿名。
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public class UserInfoController : Controller //控制器
{
//身份验证过滤器
[Authorize]
public ActionResult Index()
{
return View();
}
}
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控制器中登录
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/// <summary>
/// 用户登录
/// </summary>
/// <returns></returns>
public ActionResult login()
{
return View();
}
[HttpPost]
public ActionResult login(loginModels login) {
if (ModelState.IsValid)
{
var model = db.Admininfo.FirstOrDefault(a => a.AdminAccount == login.AdminAccount && a.AdminPwd == login.AdminPwd);
if (model != null )
{
//存入票据(用户登录的时候去存信息,如果有信息直接去登录)
var dtoModel = new Users
{
id = model.id,
AdminPwd = model.AdminPwd,
AdminAccount=model.AdminAccount
};
//调用
SetAuthCookie(dtoModel);
//获取登录地址
var returnUrl = Request[ "ReturnUrl" ];
//判断登录地址是不是空值
if (! string .IsNullOrWhiteSpace(returnUrl))
{
return Redirect(returnUrl);
}
else
{
//return RedirectiToAction
return Redirect( "/Home/index" );
}
}
else
{
ModelState.AddModelError( "" , "账号密码不对" );
return View(login);
}
}
else
{
ModelState.AddModelError( "" , "输入的信息有误" );
return View(login);
}
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对登录账号进行cookie
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/// <summary>
/// 对登录账号进行cookie
/// </summary>
/// <param name="model"></param>
public void SetAuthCookie(Users loginModel) {
//1、将对象转换成json
var userdata = loginModel.ToJson();
//2、创建票据FormsAuthenticationTicket
FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(2, "loginUser" ,DateTime.Now,DateTime.Now.AddDays(1), false , userdata);
//对票据进行加密
var tickeEncrypt = FormsAuthentication.Encrypt(ticket);
//创建Cookie,定义
HttpCookie cookie = new HttpCookie(FormsAuthentication.FormsCookieName, tickeEncrypt);
cookie.HttpOnly = true ;
cookie.Secure = FormsAuthentication.RequireSSL;
cookie.Domain = FormsAuthentication.CookieDomain;
cookie.Path = FormsAuthentication.FormsCookiePath;
cookie.Expires = DateTime.Now.Add(FormsAuthentication.Timeout);
//先移除cookie,在添加cookie
Response.Cookies.Remove(FormsAuthentication.FormsCookieName);
Response.Cookies.Add(cookie);
}
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3、Models中添加模型文件
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public class loginModels
{
/// <summary>
/// 账号
/// </summary>
[DisplayName( "账号" )]
[Required(ErrorMessage = "账号不能为空" )]
public string AdminAccount { get ; set ; }
/// <summary>
/// 密码
/// </summary>
[DisplayName( "密码" )]
[Required(ErrorMessage = "密码不能为空" )]
public string AdminPwd { get ; set ; }
}
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4、Views中 Login 代码:
@using (Html.BeginForm("Login", "Account", new { ReturnUrl = ViewBag.ReturnUrl }, FormMethod.Post, new { @class = "form-horizontal", role = "form" }))
5、Global设置
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protected void Application_AuthenticateRequest( object sender, EventArgs e)
{
//1、通过sender获取http请求
// HttpApplication app = new HttpApplication();//实例化
HttpApplication app = sender as HttpApplication;
//2、拿到http上下文
HttpContext context = app.Context;
//3、根据FormsAuthe,来获取cookie
var cookie = context.Request.Cookies[FormsAuthentication.FormsCookieName];
if (cookie != null )
{
//获取cookie的值
var ticket = FormsAuthentication.Decrypt(cookie.Value);
if (! string .IsNullOrWhiteSpace(ticket.UserData))
{
//把一个字符串类别变成实体模型
var model = ticket.UserData.ToObject<AdmininfoViewModel>();
//var acount = model.AdminAccount; //获取账号
context.User = new MyFormsPrincipal<AdmininfoViewModel>(ticket, model);
//MyFormsPrincipal.Identity = new FormsIdentity(ticket);
// MyFormsPrincipal.userdata;
}
}
}
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6、退出登录
控制器中
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/// <summary>
/// 退出登录
/// </summary>
public ActionResult loginout()
{
//删除票据
FormsAuthentication.SignOut();
//清除cookie
Response.Cookies[FormsAuthentication.FormsCookieName].Expires = DateTime.Now.AddDays(-1);
Response.Cookies.Remove(FormsAuthentication.FormsCookieName);
return RedirectToAction( "Index" , "Home" );
}
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View跳转链接
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@Html.ActionLink( "安全退出" , "loginout" , "Users" )
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以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:http://www.jianshu.com/p/d188bb8814f8