CODEWITHSUNDEEP
.netamazon-web-servicesamazon-s3
Jared
Jared

Reputation: 145

How do I force the AWS .NET SDK to utilize the us-east-1 regional endpoint for S3 rather than the legacy global endpoint?

When utilizing the .Net AWS SDK for S3, I've noticed that by default when talking to a bucket in us-east-1, that it is utilizing the legacy global endpoint BUCKETNAME.s3.amazonaws.com rather then the regional endpoint BUCKETNAME.s3.us-east-1.amazonaws.com.

How do I force the SDK to utilize the regional endpoint?

Example .Net 6 code:

using Amazon;
using Amazon.Runtime;
using Amazon.S3;

AmazonS3Config config = new Amazon.S3.AmazonS3Config();
config.RegionEndpoint = RegionEndpoint.GetBySystemName("us-east-1");

Console.WriteLine($"S3 Client Service URL: {config.DetermineServiceURL()}");

S3 Client Service URL: https://s3.amazonaws.com/

Upvotes: 1

Views: 715

Answers (3)

Ermiya Eskandary
Ermiya Eskandary

Reputation: 23602

To send the us-east-1 S3 requests to the regional endpoint, set the USEast1RegionalEndpointValue property on the AmazonS3Config object to S3UsEast1RegionalEndpointValue.Regional.

This will force the routing of us-east-1 S3 requests to the regional endpoint instead of the legacy global endpoint.

using Amazon;
using Amazon.Runtime;
using Amazon.S3;

AmazonS3Config config = new AmazonS3Config
{
    USEast1RegionalEndpointValue = S3UsEast1RegionalEndpointValue.Regional,
    RegionEndpoint = RegionEndpoint.USEast1
};

Console.WriteLine($"S3 Client Service URL: {config.DetermineServiceURL()}");

S3 Client Service URL: https://s3.us-east-1.amazonaws.com/

GetPreSignedURL example for the us-east-1 region using the regional endpoint:

var bucketName = "your-bucket-name";

var amazonS3Config = new AmazonS3Config
{
    RegionEndpoint = RegionEndpoint.USEast1,
    USEast1RegionalEndpointValue = S3UsEast1RegionalEndpointValue.Regional
};

using var s3Client = new AmazonS3Client(amazonS3Config);

var objectKey = "your-object-key";

var request = new GetPreSignedUrlRequest
{
    BucketName = bucketName,
    Key = objectKey,
    Expires = DateTime.UtcNow.AddHours(1),
};

var preSignedUrl = s3Client.GetPreSignedURL(request);

Console.WriteLine("Pre-signed URL: " + preSignedUrl);

Pre-signed URL: https://your-bucket-name.s3.us-east-1.amazonaws.com/your-object-key?AWSAccessKeyId=xxx&Expires=xxx&Signature=xxx

Upvotes: 1

Irene Governale
Irene Governale

Reputation: 1

You can do this more easily if you simply pass the appropriate region to the S3 client object's constructor. For example:

_s3Client = new AmazonS3Client(RegionEndpoint.USEast1);

Upvotes: 0

Jared
Jared

Reputation: 145

You'll need to tell the client to explicitly utilize the regional endpoint rather than the legacy global endpoint which is the default.

config.USEast1RegionalEndpointValue = S3UsEast1RegionalEndpointValue.Regional;

By modifying the code with this change:

using Amazon;
using Amazon.Runtime;
using Amazon.S3;

AmazonS3Config config = new Amazon.S3.AmazonS3Config();
config.RegionEndpoint = RegionEndpoint.GetBySystemName("us-east-1");

config.USEast1RegionalEndpointValue = S3UsEast1RegionalEndpointValue.Regional;

Console.WriteLine($"S3 Client Service URL: {config.DetermineServiceURL()}");

You now get the regional endpoint service url:

S3 Client Service URL: https://s3.us-east-1.amazonaws.com/

Upvotes: 1

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