What methods can you use to transfer data to cloud infrastructure?

Data transfer to cloud infrastructure can be carried out in several ways:

1. HTTP/HTTPS requests — sending data via the cloud provider's REST API using standard HTTP clients.
2. Cloud provider SDKs — using official libraries (e.g., AWS SDK, Google Cloud SDK) for programmatic data upload.
3. CLI tools — command-line utilities provided by cloud services (e.g., aws cli, gcloud) for transferring files and data.
4. File transfer protocols — such as SFTP, SCP, if the cloud infrastructure supports SSH access.
5. Message queues and streaming — using services like Kafka, RabbitMQ, or cloud queues for streaming data transfer.

Example of uploading a file to AWS S3 using Go SDK:

import (
    "context"
    "fmt"
    "os"

    "github.com/aws/aws-sdk-go-v2/config"
    "github.com/aws/aws-sdk-go-v2/service/s3"
    "github.com/aws/aws-sdk-go-v2/service/s3/types"
)

func uploadFile(bucket, key, filename string) error {
    cfg, err := config.LoadDefaultConfig(context.TODO())
    if err != nil {
        return err
    }
    client := s3.NewFromConfig(cfg)

    file, err := os.Open(filename)
    if err != nil {
        return err
    }
    defer file.Close()

    _, err = client.PutObject(context.TODO(), &s3.PutObjectInput{
        Bucket: &bucket,
        Key:    &key,
        Body:   file,
        ACL:    types.ObjectCannedACLPrivate,
    })
    return err
}