Connect to S3 bucket without giving region name - amazon-web-services

Question

I need to download objects from S3 bucket and I have below information to access the S3 bucket.
Access Key, Secret Key and Bucket End point. There is no region name.
I was using minio package to access the bucket and was able to access it using below code :
public void getS3BucketObject() throws IOException, NoSuchAlgorithmException,
InvalidKeyException, ServerException, InsufficientDataException, InternalException, InvalidResponseException,
XmlParserException, ErrorResponseException {
//creating minioClient to access S3 bucket
minioClient =
MinioClient.builder()
.endpoint(s3BucketEndpoint)
.credentials(s3BucketAccessKey, s3BucketSecretKey)
.build();
//check for bucket existance
boolean found =
minioClient.bucketExists(BucketExistsArgs.builder().bucket(s3BucketName).build());
if (!found) {
System.out.println("Bucket doesn't exist ");
} else {
System.out.println("Bucket exists ");
}
}
But, I do need to use AWS SDK instead of minio but I am not sure as I don't have region information and not sure how to pass endpoint in the configuration setting, though I tried below.
final BasicAWSCredentials credentials = new BasicAWSCredentials(s3BucketAccessKey, s3BucketSecretKey);
final AmazonS3 s3client = AmazonS3ClientBuilder.standard()
.withCredentials(new AWSStaticCredentialsProvider(credentials));
boolean found = s3client.doesBucketExistV2(s3BucketName);
if (found){
System.out.println("The bucket is available ");
}else {
System.out.println("The bucket doesn't exist");
}

Answer 1

Have you tried using withRegion(AWS_S3_REGION) option while creating s3client using builder?
AmazonS3 s3client = AmazonS3ClientBuilder.standard()
.withRegion("us-east-1")
.build();
Ref. https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/s3/AmazonS3ClientBuilder.html
AmazonS3ClientBuilder.defaultClient() fails to account for region?