No RegionEndpoint or ServiceURL configured

Question

I am writing code to upload files to AWS S3 and receiving this exception:

AmazonClientException: No RegionEndpoint or ServiceURL configured

My code:

Console.WriteLine("ready to upload");
AWSCredentials credentials;
credentials = new BasicAWSCredentials(accessKeyID.Trim(), secretKey.Trim());
AmazonS3Client s3Client = new AmazonS3Client(accessKeyID.Trim(), secretKey.Trim(), Amazon.RegionEndpoint.USEast1);
Console.WriteLine("Successful verification");
Console.WriteLine("Check if the bucket exists");
if (!CheckBucketExists(s3Client, bucketName))
{
    s3Client.PutBucket(bucketName);
    Console.WriteLine("create bucket");
}
TransferUtility utility = new TransferUtility();
Console.WriteLine("Upload  Directory......");
//exception here
utility.UploadDirectory(@"E:\telerikFile\13ginabdfglil.com", bucketName);

The exception:

Amazon.Runtime.AmazonClientException: No RegionEndpoint or ServiceURL configured
  Amazon.Runtime.ClientConfig.Validate()
  Amazon.S3.AmazonS3Config.Validate()
  Amazon.Runtime.AmazonServiceClient..ctor(AWSCredentials credentials, ClientConfig config)
  Amazon.S3.AmazonS3Client..ctor()
  Amazon.S3.Transfer.TransferUtility..ctor()
  Telerik2Amazon.Program.UploadFile()

What should I do?

Answer 1

The short answer to error...

Amazon.Runtime.AmazonClientException: No RegionEndpoint or ServiceURL configured

...in my case was to specify a region when constructing the client object (for me it was AmazonSimpleEmailServiceClient).

Assuming you're using BasicAWSCredentials then try this:

var credentials = new BasicAWSCredentials(accessKeyID, secretKey);

new AmazonS3Client(credentials, RegionEndpoint.USEast1);

//                              ^^^^^^^^^^^^^^^^^^^^^^  add this

Answer 2

First of all, you shouldn't hardcode aws credentials.

I had a similar error. Turned out it was due to changes in .Net Core:

One of the biggest changes in .NET Core is the removal of ConfigurationManager and the standard app.config and web.config files

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

For quick and dirty approach you can create credintial profile file on your machine see https://docs.aws.amazon.com/sdk-for-java/v1/developer-guide/setup-credentials.html

e.g. C:\Users\<USERNAME>\.aws\credentials on Windows

[default]
aws_access_key_id = your_access_key_id
aws_secret_access_key = your_secret_access_key

then in your code you can just do something like:

var dbClient = new AmazonDynamoDBClient(new StoredProfileAWSCredentials(), 
                     RegionEndpoint.USEast1);

A more involved way is: https://docs.aws.amazon.com/sdk-for-net/v3/developer-guide/net-dg-config-netcore.html#net-core-configuration-builder

public Startup(IHostingEnvironment env)
{
    var builder = new ConfigurationBuilder()
        .SetBasePath(env.ContentRootPath)
        .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
        .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
        .AddEnvironmentVariables();
    Configuration = builder.Build();
}

appsettings.Development.json

{
  "AWS": {
    "Profile": "local-test-profile",
    "Region": "us-west-2"
  }
}


var options = Configuration.GetAWSOptions();
IAmazonS3 client = options.CreateServiceClient<IAmazonS3>();