ASP核心3.1MVC中特定路由的自定义中间件(或授权)

public class AuthorizationMiddleware : IMiddleware
{
    public async Task InvokeAsync(HttpContext context, RequestDelegate next)
    {
        // 检查当前请求的路由信息
        var route = context.GetRouteData();
        var controller = route.Values["controller"]?.ToString();
        var action = route.Values["action"]?.ToString();

        // 根据路由信息进行授权判断
        if (controller == "Admin" && action == "Index")
        {
            // 执行授权逻辑
            if (!context.User.Identity.IsAuthenticated)
            {
                // 未授权，重定向到登录页面
                context.Response.Redirect("/Account/Login");
                return;
            }
            // 已授权，继续传递请求
            await next(context);
        }
        else
        {
            // 对于其他路由，直接传递请求
            await next(context);
        }
    }
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    // ...

    app.UseMiddleware<AuthorizationMiddleware>();

    // ...
}