解析需要HttpClient和字符串的服务

就我个人而言,我只想创建一个特殊的类型来容纳字符串:

class MyService(HttpClient client, MyServiceSettings settings)
{
    // use MyServiceSettings.Whatever
}

class MyServiceSettings
{
    public string Whatever { get; set; }
}

通过以下注册(添加 Microsoft.Extensions.Http 以获得访问权限 AddHttpClient ):

serviceCollection.AddSingleton(new MyServiceSettings { ... } ); // register correct value
serviceCollection.AddHttpClient<MyService>(httpClient => ...); // will register MyService as transient

或者,您可以研究工厂方法:

serviceCollection.AddHttpClient("someName", httpClient => ...);
serviceCollection.AddTransient(sp =>
    new MyService(
        sp.GetRequiredService<IHttpClientFactory>().CreateClient("someName"), 
        "{getYourString}"));

实际上,该字符串在应用程序生存期内是静态的,它来自args,并包含每个对该实例的请求所使用的users令牌

在某些情况下,您只需设置 HttpClient 本身,例如,如果令牌作为标头传递,则可以执行以下操作:

serviceCollection.AddHttpClient<MyService>(httpClient =>
{
    httpClient.DefaultRequestHeaders.Add("tokenHeaderName", "tokenValFromArgs");
});