Get an Amazon S3 object from a Multi-Region Access Point by using an AWS SDK

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Get an Amazon S3 object from a Multi-Region Access Point by using an AWS SDK - Amazon Simple Storage Service

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The following code example shows how to get an object from a Multi-Region Access Point.

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SDK for Kotlin

Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository.

Configure the S3 client to use the Asymmetric Sigv4 (Sigv4a) signing algorithm.


        suspend fun createS3Client(): S3Client {
            // Configure your S3Client to use the Asymmetric SigV4 (SigV4a) signing algorithm.
            val sigV4aScheme = SigV4AsymmetricAuthScheme(DefaultAwsSigner)
            val s3 = S3Client.fromEnvironment {
                authSchemes = listOf(sigV4aScheme)
            }
            return s3
        }

Use the Multi-Region Access Point ARN instead of a bucket name to retrieve the object.


    suspend fun getObjectFromMrap(
        s3: S3Client,
        mrapArn: String,
        keyName: String,
    ): String? {
        val request = GetObjectRequest {
            bucket = mrapArn // Use the ARN instead of the bucket name for object operations.
            key = keyName
        }

        var stringObj: String? = null
        s3.getObject(request) { resp ->
            stringObj = resp.body?.decodeToString()
            if (stringObj != null) {
                println("Successfully read $keyName from $mrapArn")
            }
        }
        return stringObj
    }

For more information, see AWS SDK for Kotlin developer guide.
For API details, see GetObject in AWS SDK for Kotlin API reference.

For a complete list of AWS SDK developer guides and code examples, see Developing with Amazon S3 using the AWS SDKs. This topic also includes information about getting started and details about previous SDK versions.