Asp.Net:没有合适的AuthenticationMiddleware构造函数

Question

我目前正在尝试编写AuthenticationMiddleware.看到这个答案.应用程序构建没有错误,但当我执行时,dnx web我收到以下错误:

无法找到"Namespace.BasicAuthenticationMiddleware"类型的合适构造函数.确保类型是具体的,并且构造函数接受所有参数.

在Microsoft.Extensions.Internal.ActivatorUtilities.CreateInstance(IServiceProvider provider,Type instanceType,Object []参数)

在Microsoft.AspNet.Builder.UseMiddlewareExtensions.<> c__DisplayClass2_0.b__0(RequestDelegate next)

在Microsoft.AspNet.Builder.Internal.ApplicationBuilder.Build()

在Microsoft.AspNet.Hosting.Internal.HostingEngine.BuildApplication()

失败:Microsoft.AspNet.Hosting.Internal.HostingEngine [7]

我确信我使用的构造函数签名在某种程度上是错误的,但我无法为此找到合适的文档,因为似乎有几十个已弃用的文档.

这是AuthenticationMiddleware:

public class BasicAuthenticationMiddleware : AuthenticationMiddleware<BasicAuthOptions>
{
    public BasicAuthenticationMiddleware(
        RequestDelegate next, 
        BasicAuthOptions options, 
        ILoggerFactory loggerFactory, 
        IUrlEncoder urlEncoder)
        : base(next, options, loggerFactory, urlEncoder) {}

    protected override AuthenticationHandler<BasicAuthOptions> CreateHandler()
    {
        return new BasicAuthenticationHandler();
    }
}

BasicAuthOptions:

public class BasicAuthOptions : AuthenticationOptions {
    public const string Scheme = "BasicAuth";
    public BasicAuthOptions()
    {
        AuthenticationScheme = Scheme;
        AutomaticAuthenticate = true;
    }
}

BasicAuthenticationExtensions

public static class BasicAuthenticationExtensions
{
    public static void UseBasicAuthentication(this IApplicationBuilder builder) {
        builder.UseMiddleware<BasicAuthenticationMiddleware>(new ConfigureOptions<BasicAuthOptions>(o => new BasicAuthOptions()));
    }
}

Startup.cs:

public class Startup
{
    public Startup(IHostingEnvironment env)
    {
        // Set up configuration sources.
        var builder = new ConfigurationBuilder()
            .AddJsonFile("appsettings.json")
            .AddEnvironmentVariables();
        Configuration = builder.Build();
    }

    public IConfigurationRoot Configuration { get; set; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        // Add framework services.
        services.AddMvc();

        services.AddAuthorization(options => {
            options.AddPolicy(BasicAuthOptions.Scheme, policy => policy.Requirements.Add(new BasicAuthRequirement()));
        });
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
    {
        loggerFactory.AddConsole(Configuration.GetSection("Logging"));
        loggerFactory.AddDebug();

        app.UseIISPlatformHandler();

        app.UseStaticFiles();

        app.UseBasicAuthentication();

        app.UseMvc();
    }

    // Entry point for the application.
    public static void Main(string[] args) => Microsoft.AspNet.Hosting.WebApplication.Run<Startup>(args);
}

Answer 1

您的UseBasicAuthentication扩展程序尝试注入ConfigureOptions您的中间件不作为参数的实例.

只需按顺序流动选项实例:

public static class BasicAuthenticationExtensions {
    public static void UseBasicAuthentication(this IApplicationBuilder builder) {
        builder.UseMiddleware<BasicAuthenticationMiddleware>(new BasicAuthOptions());
    }
}