如何在.Net Core中DI注册FirebaseApp？

Question

我应该如何在 Net core 中注册 FirebaseApp 实例？ 作为 singleton 之类的

   //startup.cs
   services.AddSingleton<FirebaseApp>(sp =>
   {
       FirebaseApp.Create(new AppOptions
       {
           Credential = GoogleCredential.FromJson(settings)
       });
   });

或类似的范围

   //startup.cs
   services.AddScoped<FirebaseApp>(sp =>
   {
       FirebaseApp.Create(new AppOptions
       {
           Credential = GoogleCredential.FromJson(settings)
       });
   });

还是第三种选择？

Answer 1

因此，在 .net 6 中的构建器之后，我只需使用以下命令对其进行实例化：

var builder = WebApplication.CreateBuilder(args);
// after the builder so that I can get the configurations for google credentials
// check if the instance is already loaded, if not build it up
if(FirebaseApp.DefaultInstance == null)
{
    FirebaseApp.Create(new AppOptions()
    {
        Credential = GoogleCredential.FromJson(AuthConfig.GetGoogleCredentialObject(builder.Configuration).ToString())
    });
}

然后，您不需要将其注入到类的构造函数中。

您只需调用实例并加载其他 firebase 模块，如下所示：

...
// this is a singleton and the props are static so available anytime
var customToken = FirebaseApp.DefaultInstance;

// use the instance from the singleton
await FirebaseAuth.GetAuth(customToken).SetCustomUserClaimsAsync(uid, additionalClaims);
....