注册多个 Amazon S3 客户端

Question

这是我为多个 S3 客户端制作的两个接口：

public interface IAmazonS3First : IAmazonS3
{

}

public interface IAmazonS3Second : IAmazonS3
{

}

在 Program.cs 中，我添加了以下 sdetup 来设置依赖注入：

var awsOption = configuration.GetAWSOptions();
    awsOption.Credentials = new BasicAWSCredentials(configuration["FirstAccessKey"], configuration["FirstSecretKey"]);
    services.AddAWSService<IAmazonS3First>(awsOption);


   awsOption = configuration.GetAWSOptions();
        awsOption.Credentials = new BasicAWSCredentials(configuration["SecondAccessKey"], configuration["SecondSecretKey"]);
        services.AddAWSService<IAmazonS3Second>(awsOption);

在目标类中，我想利用这两个客户端并设置了以下代码：

    private readonly IAmazonS3First _s3FirstClient;
    private readonly IAmazonS3Second _s3SecondClient;


    public MyService(IAmazonS3First s3FirstClient, IAmazonS3Second s3SecondClient)
    {
        _s3FirstClient = s3FirstClient;
        _s3SecondClient = s3SecondClient;

问题：当我调用该服务时，出现以下错误：

An unhandled exception has occurred while executing the request.
      System.NullReferenceException: Object reference not set to an instance of an object.
         at Amazon.Extensions.NETCore.Setup.ClientFactory.CreateConfig(Type serviceInterfaceType, AWSOptions options)
         at Amazon.Extensions.NETCore.Setup.ClientFactory.CreateServiceClient(ILogger logger, Type serviceInterfaceType, AWSOptions options)
         at Amazon.Extensions.NETCore.Setup.ClientFactory.CreateServiceClient(IServiceProvider provider)

你能分享一下我在添加注射时做错了什么吗？

我的目标是使用两个不同的 Amazon S3 客户端（两组不同的 AWS 访问密钥/秘密密钥）

Answer 1

GetAWSOptions() 方法用于设置包含一些选项的部分（来自您的配置）。

https://docs.aws.amazon.com/sdk-for-net/v3/developer-guide/net-dg-config-netcore.html

{
  "service1": {
    "Profile": "default",
    "Region": "us-west-2"
  },
  "service2": {
    "Profile": "default",
    "ServiceURL": "URL"
  }
}

You can then get the options for a specific service by using the entry in the JSON file. For example, to get the settings for service1 use the following.

var options = Configuration.GetAWSOptions("service1");

不带参数使用时，默认为 DEFAULT_CONFIG_SECTION = "AWS"。 您的配置中有“AWS”部分吗？

喜欢

{
  "AWS": {
    "Profile": "local-test-profile",
    "Region": "us-west-2"
  },
  "SupportEmail": "[email protected]"
}