.net MVC使用IPrincipal进行Form登录即权限验证，供大家参考，具体内容如下
1.在MVC项目中添加用户类，可以根据实际项目需求添加必要属性
public class UserData {
/// <summary> /// ID /// </summary> public int UserId {
get;
set;
}
/// <summary> /// 用户名 /// </summary> public string UserName {
get;
set;
}
/// <summary> /// 角色ID列表 /// </summary> public List<int> Roles {
get;
set;
}
}
2.添加类Principal实现IPrincipal接口
public class Principal : IPrincipal {
public IIdentity Identity {
get;
private set;
}
public UserData Account {
get;
set;
}
/// <summary> /// 构造函数 /// </summary> /// <param name="ticket"></param> /// <param name="account"></param> public Principal(FormsAuthenticationTicket ticket, UserData account) {
if (ticket == null) throw new ArgumentNullException("ticket");
if (account == null) throw new ArgumentNullException("UserData");
this.Identity = new FormsIdentity(ticket);
this.Account = account;
}
public bool IsInRole(string role) {
if (string.IsNullOrEmpty(role)) return true;
if (this.Account == null || this.Account.Roles == null) return false;
return role.Split(',').Any(q => Account.Roles.Contains(int.Parse(q)));
}
}
IPrincipal接口有对象Identity已经需要实现验证角色方法IsInRole()。在我们的实现类中添加了"用户信息(UserData)"属性Account。
构造函数中进行了初始化，第一个对象为Form验证的票据对象，下面ticket会携带用户信息一起保存进cookie中。
3.创建存储cookie和读取cookie的类
/// <summary> /// 写入cookie和读取cookie /// </summary> public class HttpFormsAuthentication {
//将用户信息通过ticket加密保存到cookie public static void SetAuthenticationCoolie(UserData account, int rememberDay = 0) {
if (account == null) throw new ArgumentNullException("account");
//序列化account对象 string accountJson = JsonConvert.SerializeObject(account);
//创建用户票据 var ticket = new FormsAuthenticationTicket(1, account.UserName, DateTime.Now, DateTime.Now.AddDays(rememberDay), false, accountJson);
//加密 string encryptAccount = FormsAuthentication.Encrypt(ticket);
//创建cookie var cookie = new HttpCookie(FormsAuthentication.FormsCookieName, encryptAccount) {
HttpOnly = true, Secure = FormsAuthentication.RequireSSL, Domain = FormsAuthentication.CookieDomain, Path = FormsAuthentication.FormsCookiePath }
;
if (rememberDay > 0) cookie.Expires = DateTime.Now.AddDays(rememberDay);
//写入Cookie HttpContext.Current.Response.Cookies.Remove(cookie.Name);
HttpContext.Current.Response.Cookies.Add(cookie);
}
//获取cookie并解析出用户信息 public static Principal TryParsePrincipal(HttpContext context) {
if (context == null) throw new ArgumentNullException("context");
HttpRequest request = context.Request;
HttpCookie cookie = request.Cookies[FormsAuthentication.FormsCookieName];
if (cookie == null || string.IsNullOrEmpty(cookie.Value)) {
return null;
}
//解密coolie值 FormsAuthenticationTicket ticket = FormsAuthentication.Decrypt(cookie.Value);
UserData account = JsonConvert.DeserializeObject<UserData>(ticket.UserData);
return new Principal(ticket, account);
}
}
存储cookie时将用户信息序列化后的字符串accountJson由ticket其携带加密后保存入cookie中，具体的accountJson被赋值给FormsAuthenticationTicket的UserData属性。
可看到解析时将ticket.UserData反序列化后得到了原始的用户信息对象，然后生成Principal对象。
解析cookie得到Principal对象的方法TryParsePrincipal，下面会在发起请求时用到，而返回的Principal对象被赋值给HttpContext.User。
4.在Global.asax中注册Application_PostAuthenticateRequest事件，保证权限验证前将cookie中的用户信息取出赋值给User
protected void Application_PostAuthenticateRequest(object sender, System.EventArgs e) {
HttpContext.Current.User = HttpFormsAuthentication.TryParsePrincipal(HttpContext.Current);
}
5.集成AuthorizeAttribute特性类并重写AuthorizeCore，HandleUnauthorizedRequest方法
public class FormAuthorizeAttribute : AuthorizeAttribute {
/// <summary> /// 先进入此方法，此方法中会调用 AuthorizeCore 验证逻辑，验证不通过会调用 HandleUnauthorizedRequest 方法 /// </summary> /// <param name="filterContext"></param> public override void OnAuthorization(AuthorizationContext filterContext) {
base.OnAuthorization(filterContext);
}
/// <summary> /// 权限验证 /// </summary> /// <param name="httpContext"></param> /// <returns></returns> protected override bool AuthorizeCore(HttpContextBase httpContext) {
var user = httpContext.User as Principal;
if (user != null) return user.IsInRole(base.Roles);
return false;
}
protected override void HandleUnauthorizedRequest(AuthorizationContext filterContext) {
//验证不通过，直接跳转到相应页面，注意：如果不是哟娜那个以下跳转，则会继续执行Action方法 filterContext.Result = new RedirectResult("~/Login/Index");
}
}
AuthorizeCore与HandleUnauthorizedRequest方法均是在方法OnAuthorization中调用，AuthorizeCore验证不通过才会调用HandleUnauthorizedRequest方法。
将验证代码在AuthorizeCore中实现，验证不通过的逻辑在HandleUnauthorizedRequest方法中实现。
6.添加LoginController实现登录逻辑
namespace MVCAuthorizeTest.Controllers{
public class LoginController : Controller {
[AllowAnonymous] // GET: Login public ActionResult Index(string returnUrl) {
ViewBag.ReturnUrl = returnUrl;
return View();
}
[HttpPost] [AllowAnonymous] public ActionResult Index(string name, string password, bool rememberMe, string returnUrl) {
var account = new UserData() {
UserName = name, UserId = 110, Roles = new List<int>() {
1, 2, 3 }
}
;
HttpFormsAuthentication.SetAuthenticationCoolie(account, rememberMe ? 7 : 0);
if (Url.IsLocalUrl(returnUrl) && returnUrl.Length > 1 && returnUrl.StartsWith("/") && !returnUrl.StartsWith("//") && !returnUrl.StartsWith("/\")) {
return Redirect(returnUrl);
}
else {
return RedirectToAction("Index", "Home");
}
}
// POST: /Account/LogOff [HttpPost] public ActionResult LogOff() {
System.Web.Security.FormsAuthentication.SignOut();
return RedirectToAction("Index", "Home");
}
}
}
7.对需要验证的controller或action添加特性标签
[FormAuthorize(Roles = "1,2")] public class HomeController : Controller {
[FormAuthorize] public ActionResult Index() {
return View();
}
}
如图
8.在添加FilterConfig中添加全局注册filter，减少每个action分别设置。如果有不需要验证的页面，添加[AllowAnonymous]特性即可
public class FilterConfig {
public static void RegisterGlobalFilters(GlobalFilterCollection filters) {
filters.Add(new HandleErrorAttribute());
//全局注册filter filters.Add(new FormAuthorizeAttribute());
}
}
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脚本之家。
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