详解.Net Core 权限验证与授权(AuthorizeFilter、ActionFilterAttribute)
在.net core 中使用authorizefilter或者actionfilterattribute来实现登录权限验证和授权
一、authorizefilter
新建授权类allowanonymous继承authorizefilter,iallowanonymousfilter
public class allowanonymous : authorizefilter, iallowanonymousfilter { }
新建拦截类继承authorizefilter
public class loginauthorzation : authorizefilter { }
在拦截类里加入处理请求的方法
/// <summary> /// 请求验证,当前验证部分不要抛出异常,exceptionfilter不会处理 /// </summary> /// <param name="context">请求内容信息</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(); //验证 var flag=poweristrue.ishavepower(controllername, actionname); if (flag.item1!=0) { context.result = new redirectresult("/home/index"); } } //判断是否不需要权限 public static bool ishaveallow(ilist<ifiltermetadata> filers) { for (int i = 0; i < filers.count; i++) { if (filers[i] is iallowanonymousfilter) { return true; } } return false; }
新建一个业务逻辑判断的类
public static (int,string) ishavepower(string controllername,string actionname) { return (0,"通过"); }
在startup注册
services.addmvc(options => { options.filters.add<loginauthorzation>(); // 添加身份验证过滤器 }
context.httpcontext.request.path.value 获取请求过来的url
二、actionfilterattribute
创建权限判断类继承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 = "没得权限"; filtercontext.result = new redirectresult("/account/login"); } base.onactionexecuting(filtercontext); } public class nopermissionrequiredattribute : actionfilterattribute { public override void onactionexecuting(actionexecutingcontext filtercontext) { base.onactionexecuting(filtercontext); } } }
在startup注册
services.addmvc(options => { options.filters.add<actionfilterattributelogin>(); // 添加身份验证过滤器 -- 菜单操作权限 }
filtercontext.actiondescriptor as controlleractiondescriptor 获取请求进来的控制器与方法
controlleractiondescriptor.methodinfo.getcustomattributes(inherit: true )
.any(a => a.gettype().equals( typeof (nopermissionrequiredattribute))) 判断请求的控制器和方法有没有加上nopermissionrequiredattribute(不需要权限)
string.isnullorwhitespace(filtercontext.httpcontext.request.query["logininfo"].tostring()) 判断请求头是否有标识
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