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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