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

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

My access key id and secret key are can be used.
Therefore I give up using TransferUtility Class and chosing another Class named PutObjectRequest to upload my files
attontion: PutObjectRequest’s Property Key,it's directory name and file name must equal to local files' directory name and file name.
codes here:

        String s3Path = "987977/Baby.db";
        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("Creat bucket");
        }
        string localPath = @"E:\telerikFile\987977\Baby.db";
        PutObjectRequest obj = new PutObjectRequest();
        var fileStream = new FileStream(localPath, FileMode.Open, FileAccess.Read);
  //      obj.FilePath= @"E:\telerikFile\987977\Baby.db";
        obj.InputStream = fileStream;
        obj.BucketName = bucketName;
        obj.Key = s3Path;
       // obj.ContentBody = "This is sample content...";
        obj.CannedACL = S3CannedACL.PublicRead;
        Console.WriteLine("uploading");
        // default to set public right  
        s3Client.PutObject(obj);

Answer 3

In Asp.Net this error can be fixed by adding this line to Web.config:

<add key="AWSRegion" value="us-east-1" />

Worked for me for AWSSDK.SimpleEmail v3.3

Answer 4

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>();

Answer 5

If you are using TransferUtility() try this:

var credentials = new BasicAWSCredentials(accessKeyID, secretKey);

var S3Client = new AmazonS3Client(credentials, RegionEndpoint.USEast1);

this._transferUtility = new TransferUtility(S3Client);