禁用/删除'?ReturnUrl ='来自url的netcore 2

时间:2018-04-02 10:06:20

标签: c# asp.net-core asp.net-core-2.0

我正试图找到一种方法来防止我的aspnetcore应用程序添加"?ReturnUrl ="到URL。有谁知道如何使用某种中间件。

我尝试过如下操作,但它没有任何效果:

public class RequestHandlerMiddleware
{
    private readonly RequestDelegate _next;

    public RequestHandlerMiddleware(RequestDelegate next)
    {
        _next = next;
    }

    public async Task Invoke(HttpContext context)
    {
        if(context.Request.QueryString.HasValue && context.Request.QueryString.Value.Contains("?ReturnUrl="))
        {
            context.Request.QueryString = new QueryString(string.Empty);
        }
        await _next.Invoke(context);
    }
}

public static class RequestHandlerMiddlewareExtension
{
    public static IApplicationBuilder UseRequestHandlerMiddleware(this IApplicationBuilder builder)
    {
        return builder.UseMiddleware<RequestHandlerMiddleware>();
    }
}

startup.cs注册:

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }
    else
    {
        app.UseExceptionHandler("/error");
    }

    app.UseDefaultFiles();
    app.UseStaticFiles();

    app.UseAuthentication();
    app.UseRequestHandlerMiddleware();

    app.UseMvc(routes =>
    {
        routes.MapRoute(
            name: "default",
            template: "{controller}/{action=Index}/{id?}");
    });
}

最后,我还尝试了一些(调整过的)旧文章中关于.NET框架here (on stackoverflow)同样问题的方法,但也失败了

修改:我没有使用除标准之外的任何其他AuthorizationAttribute / Handler&#39; [授权]属性。只有:

services.AddAuthorization();

编辑2:我完全忘记了我也在应用程序的其他位置注册了部分启动项,因为它是共享的:

    public static IServiceCollection Load(IServiceCollection services, IConfiguration config)
    {

        services.AddDbContext<SqlContext>(options =>
        {
            options.UseSqlServer(config.GetConnectionString("DefaultConnection"));
        });

        services.AddIdentity<User, Role>(options =>
        {
            options.Lockout = new LockoutOptions
            {
                AllowedForNewUsers = true,
                DefaultLockoutTimeSpan = TimeSpan.FromMinutes(30),
                MaxFailedAccessAttempts = 5
            };
        })
        .AddEntityFrameworkStores<SqlContext>()
        .AddDefaultTokenProviders()
        .AddUserStore<UserStore<User, Role, SqlContext, Guid>>()
        .AddRoleStore<RoleStore<Role, SqlContext, Guid>>()
        .AddUserManager<ApplicationUserManager>();

        services.Configure<IdentityOptions>(options =>
        {
            options.Password.RequireDigit = false;
            options.Password.RequiredLength = 5;
            options.Password.RequireLowercase = true;
            options.Password.RequireUppercase = false;
            options.Password.RequireNonAlphanumeric = true;

        });

        services.ConfigureApplicationCookie(options =>
        options.Events = new CookieAuthenticationEvents
        {
            OnRedirectToLogin = ctx =>
            {
                if (ctx.Request.Path.StartsWithSegments("/api") &&
                    ctx.Response.StatusCode == (int)HttpStatusCode.OK)
                {
                    ctx.Response.StatusCode = (int)HttpStatusCode.Unauthorized;
                }
                else if (ctx.Response.StatusCode == (int)HttpStatusCode.Forbidden)
                {
                    ctx.Response.StatusCode = (int)HttpStatusCode.Forbidden;
                }
                else
                {
                    ctx.Response.Redirect(ctx.RedirectUri);
                }
                return Task.FromResult(0);
            }
        });
        return services;
   }

1 个答案:

答案 0 :(得分:0)

首先想到的是:

[HttpGet]
public IActionResult LogIn()
{
    if (!string.IsNullOrEmpty(Request.QueryString.Value))
        return RedirectToAction("Login");
    return View();
}

这将从URL中删除QueryString部分,以便&#34; ReturnUrl&#34;不会长时间停留在用户地址栏上并拒绝任何QueryString。

更好的解决方法是创建自己的AuthorizeAttribute版本,该版本不会将ReturnUrl放在QueryString中,但似乎有新的基于策略的授权方法,customizing AuthorizeAttribute is discouraged

也可以使用基于策略的方法并创建自定义AuthorizationHandler

(我会在尝试后立即发布更新)