如何在AddOpenIdConnect事件(OnTokenValiated)中注入服务？

How to inject services in an AddOpenIdConnect event (OnTokenValidated)?(如何在AddOpenIdConnect事件(OnTokenValiated)中注入服务？)

问题描述

我需要编写需要ConfigureServices才能完全执行的业务逻辑。 OnTokenValidated与ConfigureServices本身的位置错误。

AddOpenIdConnect中间件有什么替代方案，以便我可以 Success完全灵活地调用以使用插入的服务？

        services.AddAuthentication(options =>
        {
            options.DefaultScheme = "cookie";
            //...
        })
        .AddOpenIdConnect("oidc", options =>
        {
            options.Authority = "https://localhost:5001";
            /....
            options.Scope.Add("offline_access");

            options.Events.OnTokenValidated = async n =>
            {
                //Need other services which will only 
                //get injected once ConfigureServices method has fully executed.
            };
        }

参考：为什么 https://docs.microsoft.com/en-us/aspnet/core/fundamentals/dependency-injection?view=aspnetcore-5.0#ASP0000

推荐答案

若要解析OnTokenValidated事件处理程序内的服务，可以使用TokenValidatedContext.HttpContext.RequestServices：

Events =
{
    OnTokenValidated = async context =>
    {
        var someService = context.HttpContext.RequestServices.GetRequiredService<ISomeService>();
        var result = await someService.DoSomethingAsync();
        // a custom callback
    }
}

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