c# - 如何将应用程序服务注入(inject) AuthenticationHandler

Question

我有一个自定义 AuthenticationHandler<>依赖于应用服务的实现。有没有办法解决 AuthenticationHandler 的依赖关系？从简单的注入(inject)器？或者可能是跨线注册，以便可以从 IServiceCollection 解析应用程序服务。 ?

为简单起见，示例实现如下所示:

public class AuthHandler : AuthenticationHandler<AuthenticationSchemeOptions>
{
    private readonly ITokenDecryptor tokenDecryptor;

    public SecurityTokenAuthHandler(ITokenDecryptor tokenDecryptor,
        IOptionsMonitor<AuthenticationSchemeOptions> options, 
        ILoggerFactory logger, UrlEncoder encoder, ISystemClock clock) :
        base(options, logger, encoder, clock) =>
        this.tokenDecryptor = tokenDecryptor;

    protected override async Task<AuthenticateResult> HandleAuthenticateAsync() =>
        return tokenDecryptor.Decrypt(this);
}

...

services.AddAuthentication("Scheme")
    .AddScheme<AuthenticationSchemeOptions, AuthHandler>("Scheme", options => { });

目前的解决方案是手动跨线应用服务，不太方便:

services.AddTransient(provider => container.GetInstance<ITokenDecryptor>());

Answer 1

我正在使用 .Net 5 和Steven提供的原件从旧的 .net 核心应用程序升级后，我不再为我工作。我不得不:

public void ConfigureServices(IServiceCollection services)
{
    // ...

    services.AddAuthentication("MyScheme")
        .AddScheme<ApiKeyOptions, ApiKeyAuthenticationHandler>("MyScheme", o => { });

    var authHandlerDescriptor = services
        .First(s => s.ImplementationType == typeof(ApiKeyAuthenticationHandler));

    services.Remove(authHandlerDescriptor);

    services.AddTransient(c => container.GetInstance<ApiKeyAuthenticationHandler>());
}