如何在.Net Core中DI注冊FirebaseApp？

Question

我應該如何在 Net core 中注冊 FirebaseApp 實例？ 作為 singleton 之類的

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

或類似的范圍

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

還是第三種選擇？

Answer 1

因此，在 .net 6 中的構建器之后，我只需使用以下命令對其進行實例化：

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，您不需要將其注入到類的構造函數中。

您只需調用實例並加載其他 firebase 模塊，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);
....