.Net Core 權限驗證與受權（AuthorizeFilter、ActionFilterAttribute）

在.Net Core 中使用AuthorizeFilter或者ActionFilterAttribute來實現登陸權限驗證和受權

1、AuthorizeFilter

新建受權類AllowAnonymous繼承AuthorizeFilter，IAllowAnonymousFilter

public class AllowAnonymous : AuthorizeFilter, IAllowAnonymousFilter { }

 

新建攔截類繼承AuthorizeFilter

public class LoginAuthorzation : AuthorizeFilter { }

 

在攔截類里加入處理請求的方法

/// <summary>
        /// 請求驗證，當前驗證部分不要拋出異常，ExceptionFilter不會處理 /// </summary>
        /// <param name="context">請求內容信息</param>
        public override async Task OnAuthorizationAsync(AuthorizationFilterContext context) { if (IsHaveAllow(context.Filters)) { return; } //解析url // {/ Home / Index}
            var url = context.HttpContext.Request.Path.Value; if (string.IsNullOrWhiteSpace(url)) { return; } var list = url.Split("/"); if (list.Length<=0||url=="/") { return; } var controllerName = list[1].ToString().Trim(); var actionName = list[2].ToString().Trim(); //驗證
            var flag=PowerIsTrue.IsHavePower(controllerName, actionName); if (flag.Item1!=0) { context.Result = new RedirectResult("/Home/Index"); } } //判斷是否不須要權限

public static bool IsHaveAllow(IList<IFilterMetadata> filers) { for (int i = 0; i < filers.Count; i++) { if (filers[i] is IAllowAnonymousFilter) { return true; } } return false; } 

 

新建一個業務邏輯判斷的類

public static (int,string) IsHavePower(string controllerName,string actionName) { return (0,"經過"); }

 

在Startup註冊  

services.AddMvc(options => { options.Filters.Add<LoginAuthorzation>(); // 添加身份驗證過濾器
 }

 

context.HttpContext.Request.Path.Value   獲取請求過來的url

 

2、ActionFilterAttribute

        建立權限判斷類繼承ActionFilterAttribute

public class ActionFilterAttributeLogin: ActionFilterAttribute { public override void OnActionExecuting(ActionExecutingContext filterContext) { var isDefined = false; var controllerActionDescriptor = filterContext.ActionDescriptor as ControllerActionDescriptor; if (controllerActionDescriptor != null) { isDefined = controllerActionDescriptor.MethodInfo.GetCustomAttributes(inherit: true) .Any(a => a.GetType().Equals(typeof(NoPermissionRequiredAttribute))); } if (isDefined) return; if (string.IsNullOrWhiteSpace(filterContext.HttpContext.Request.Query["LoginInfo"].ToString())) { var item = new ContentResult(); item.Content = "沒得權限"; filterContext.Result = new RedirectResult("/Account/Login"); } base.OnActionExecuting(filterContext); } public class NoPermissionRequiredAttribute : ActionFilterAttribute { public override void OnActionExecuting(ActionExecutingContext filterContext) { base.OnActionExecuting(filterContext); } } }

 

在Startup註冊

services.AddMvc(options => { options.Filters.Add<ActionFilterAttributeLogin>(); // 添加身份驗證過濾器 -- 菜單操做權限
 }

 

filterContext.ActionDescriptor as ControllerActionDescriptor    獲取請求進來的控制器與方法

controllerActionDescriptor.MethodInfo.GetCustomAttributes(inherit: true)

.Any(a => a.GetType().Equals(typeof(NoPermissionRequiredAttribute)))      判斷請求的控制器和方法有沒有加上NoPermissionRequiredAttribute（不須要權限）

 

string.IsNullOrWhiteSpace(filterContext.HttpContext.Request.Query["LoginInfo"].ToString())     判斷請求頭是否有標識

 

 

---

 

　　歡迎你們掃描下方二維碼，和我一塊兒學習更多的知識😊