1.权限控制使用controller和 action来实现，权限方式有很多种，最近开发项目使用控制控制器方式实现代码如下
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/// <summary>/// 用户权限控制/// </summary>public class UserAuthorize : AuthorizeAttribute{ /// <summary> /// 授权失败时呈现的视图 /// </summary> public string AuthorizationFailView { get; set; } /// <summary> /// 请求授权时执行 /// </summary> /// <param name="filterContext">上下文</param> public override void OnAuthorization(AuthorizationContext filterContext) { // 获取url请求里的 controller 和 action string controllerName = filterContext.RouteData.Values["controller"].ToString(); string actionName = filterContext.RouteData.Values["action"].ToString(); // 获取用户信息 UserLoginBaseInfo _userLoginInfo = filterContext.HttpContext.Session[Property.UerLoginSession] as UserLoginBaseInfo; //根据请求过来的controller和action去查询可以被哪些角色操作: 这是查询数据库 roleid使用 1,2,3,4格式 RoleWithControllerAction roleWithControllerAction = SampleData.roleWithControllerAndAction.FirstOrDefault(r => r.ControllerName.ToLower() == controllerName.ToLower() && r.ActionName.ToLower() == actionName.ToLower() && r.RoleIds.contails("3")); // 有值处理 if (roleWithControllerAction != null) { //有权限操作当前控制器和Action的角色id this.Roles = roleWithControllerAction.RoleIds; } else { //请求失败输出空结果 filterContext.Result = new EmptyResult(); //打出提示文字 HttpContext.Current.Response.Write("对不起,你没有权限操作!"); } base.OnAuthorization(filterContext); } /// <summary> /// 自定义授权检查（返回False则授权失败） /// </summary> protected override bool AuthorizeCore(HttpContextBase httpContext) { //if (httpContext.User.Identity.IsAuthenticated) //{ // string userName = httpContext.User.Identity.Name; //当前登录用户的用户名 // User user = SampleData.users.Find(u => u.UserName == userName); //当前登录用户对象 // if (user != null) // { // Role role = SampleData.roles.Find(r => r.Id == user.RoleId); //当前登录用户的角色 // foreach (string roleid in Roles.Split(',')) // { // if (role.Id.ToString() == roleid) // return true; // } // return false; // } // else // return false; //} //else // return false; //进入HandleUnauthorizedRequest return true; } /// <summary> /// 处理授权失败的HTTP请求 /// </summary> protected override void HandleUnauthorizedRequest(AuthorizationContext filterContext) { if (string.IsNullOrWhiteSpace(AuthorizationFailView)) AuthorizationFailView = "error"; filterContext.Result = new ViewResult { ViewName = AuthorizationFailView }; }} |
二.单点登录方式使用application方式来实现
1.用户登录成功后记录当前信息
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/// <summary>/// 限制一个用户只能登陆一次/// </summary>/// <returns></returns>private void GetOnline(){ string UserID = "1"; Hashtable SingleOnline = (Hashtable)System.Web.HttpContext.Current.Application[Property.Online]; if (SingleOnline == null) SingleOnline = new Hashtable(); IDictionaryEnumerator idE = SingleOnline.GetEnumerator(); string strKey = string.Empty; while (idE.MoveNext()) { if (idE.Value != null && idE.Value.ToString().Equals(UserID)) { //already login strKey = idE.Key.ToString(); //当前用户已存在移除、 SingleOnline.Remove(strKey); System.Web.HttpContext.Current.Application.Lock(); System.Web.HttpContext.Current.Application[Property.Online] = SingleOnline; System.Web.HttpContext.Current.Application.UnLock(); break; } } //SessionID if (!SingleOnline.ContainsKey(Session.SessionID)) { SingleOnline[Session.SessionID] = UserID; System.Web.HttpContext.Current.Application.Lock(); System.Web.HttpContext.Current.Application[Property.Online] = SingleOnline; System.Web.HttpContext.Current.Application.UnLock(); }} |
2.使用ActionFilter来实现单点登录，每次点击控制器都去查询过滤是否在其它地方登录
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/// <summary> /// 用户基础信息过滤器 /// </summary> public class LoginActionFilter : ActionFilterAttribute { /// <summary> /// 初始化地址 /// </summary> public const string Url = "~/Login/Index?error="; /// <summary> /// 该方法会在action方法执行之前调用 /// </summary> /// <param name="filterContext">上下文</param> public override void OnActionExecuting(ActionExecutingContext filterContext) { // 获取上一级url // var url1 = filterContext.HttpContext.Request.UrlReferrer; UserLoginBaseInfo _userLogin = filterContext.HttpContext.Session[Property.UerLoginSession] as UserLoginBaseInfo; // 用户是否登陆 if (_userLogin == null) { filterContext.Result = new RedirectResult(Url + "登陆时间过期,请重新登陆!&url=" + filterContext.HttpContext.Request.RawUrl); } else { filterContext.HttpContext.Session.Timeout = 30; } //判断是否在其它地方登录 Hashtable singleOnline = (Hashtable)System.Web.HttpContext.Current.Application[Property.Online]; // 判断当前SessionID是否存在 if (singleOnline != null && !singleOnline.ContainsKey(HttpContext.Current.Session.SessionID)) filterContext.Result = new RedirectResult(Url + "你的帐号已在别处登陆，你被强迫下线!"); base.OnActionExecuting(filterContext); } /// <summary> /// 执行后 /// </summary> /// <param name="filterContext"></param> public override void OnResultExecuting(ResultExecutingContext filterContext) { //记录操作日志，写进操作日志中 var controllerName = filterContext.RouteData.Values["controller"]; var actionName = filterContext.RouteData.Values["action"]; base.OnResultExecuting(filterContext); } |
3.用户正常退出或则非正常退出处理当前用户信息销毁Session
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/// <summary>/// Session销毁/// </summary>protected void Session_End(){ Hashtable SingleOnline = (Hashtable)Application[Property.Online]; if (SingleOnline != null && SingleOnline[Session.SessionID] != null) { SingleOnline.Remove(Session.SessionID); Application.Lock(); Application[Property.Online] = SingleOnline; Application.UnLock(); } Session.Abandon();} |
以上所述是小编给大家介绍的Asp.net mvc 权限过滤和单点登录（禁止重复登录），希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的！
原文链接：http://www.cnblogs.com/louby/archive/2016/12/08/6145810.html
