gistfile1.txt

# AWS-CLI example to add custom-metadata to an existing object using the zero-copy API
aws --endpoint-url $ENDPOINT s3api copy-object --bucket $BUCKET --copy-source $BUCKET/$KEY --key $KEY --metadata '{"custom-thing":"123456"}' --metadata-directive REPLACE

# Golang code to get the contents of an object, very similar to Boto3
input := &s3.GetObjectInput{Bucket: bucketname, Key: &k}
result, err := input_svc.GetObject(input)

# Boto3 reference for CopyObject, which is a zero-copy operation on FlashBlade
https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/s3.html#S3.Client.copy_object

# Golang code that puts object and adds key to Kafka topic to alert downstream consumers
            put_cfg := &s3.PutObjectInput{
                Body:   bytes.NewReader(val_blob),
                Bucket: &offloadBucket,
                Key:    key,
            }
            _, err := offload_svc.PutObject(put_cfg)
            reportAWSError(err)
            path := "s3://" + offloadBucket + "/" + *key
            val_blob = []byte(path)

            if stagingTopic != "" {
                _ = kafkaProducer.Produce(&kafka.Message{
                    TopicPartition: kafka.TopicPartition{Topic: &stagingTopic, Partition: kafka.PartitionAny},
                    Value:          val_blob,
                }, delivery_chan)