Ada lebih banyak contoh AWS SDK yang tersedia di repo Contoh [SDK AWS Doc](https://github.com/awsdocs/aws-doc-sdk-examples). GitHub 

Terjemahan disediakan oleh mesin penerjemah. Jika konten terjemahan yang diberikan bertentangan dengan versi bahasa Inggris aslinya, utamakan versi bahasa Inggris.

# Contoh Amazon S3 menggunakan SDK for Go V2
<a name="go_2_s3_code_examples"></a>

Contoh kode berikut menunjukkan cara melakukan tindakan dan menerapkan skenario umum dengan menggunakan AWS SDK untuk Go V2 dengan Amazon S3.

*Dasar-dasar* adalah contoh kode yang menunjukkan kepada Anda bagaimana melakukan operasi penting dalam suatu layanan.

*Tindakan* merupakan kutipan kode dari program yang lebih besar dan harus dijalankan dalam konteks. Sementara tindakan menunjukkan cara memanggil fungsi layanan individual, Anda dapat melihat tindakan dalam konteks dalam skenario terkait.

*Skenario* adalah contoh kode yang menunjukkan kepada Anda bagaimana menyelesaikan tugas tertentu dengan memanggil beberapa fungsi dalam layanan atau dikombinasikan dengan yang lain Layanan AWS.

Setiap contoh menyertakan tautan ke kode sumber lengkap, di mana Anda dapat menemukan instruksi tentang cara mengatur dan menjalankan kode dalam konteks.

**Topics**
+ [Memulai](#get_started)
+ [Hal-hal mendasar](#basics)
+ [Tindakan](#actions)
+ [Skenario](#scenarios)
+ [Contoh nirserver](#serverless_examples)

## Memulai
<a name="get_started"></a>

### Halo Amazon S3
<a name="s3_Hello_go_2_topic"></a>

Contoh kode berikut menunjukkan cara memulai menggunakan Amazon S3.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/s3#code-examples). 

```
package main

import (
	"context"
	"errors"
	"fmt"

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

// main uses the AWS SDK for Go V2 to create an Amazon Simple Storage Service
// (Amazon S3) client and list up to 10 buckets in your account.
// This example uses the default settings specified in your shared credentials
// and config files.
func main() {
	ctx := context.Background()
	sdkConfig, err := config.LoadDefaultConfig(ctx)
	if err != nil {
		fmt.Println("Couldn't load default configuration. Have you set up your AWS account?")
		fmt.Println(err)
		return
	}
	s3Client := s3.NewFromConfig(sdkConfig)
	count := 10
	fmt.Printf("Let's list up to %v buckets for your account.\n", count)
	result, err := s3Client.ListBuckets(ctx, &s3.ListBucketsInput{})
	if err != nil {
		var ae smithy.APIError
		if errors.As(err, &ae) && ae.ErrorCode() == "AccessDenied" {
			fmt.Println("You don't have permission to list buckets for this account.")
		} else {
			fmt.Printf("Couldn't list buckets for your account. Here's why: %v\n", err)
		}
		return
	}
	if len(result.Buckets) == 0 {
		fmt.Println("You don't have any buckets!")
	} else {
		if count > len(result.Buckets) {
			count = len(result.Buckets)
		}
		for _, bucket := range result.Buckets[:count] {
			fmt.Printf("\t%v\n", *bucket.Name)
		}
	}
}
```
+  Untuk detail API, lihat [ListBuckets](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.ListBuckets)di *Referensi AWS SDK untuk Go API*. 

## Hal-hal mendasar
<a name="basics"></a>

### Pelajari dasar-dasarnya
<a name="s3_Scenario_GettingStarted_go_2_topic"></a>

Contoh kode berikut ini menunjukkan cara untuk melakukan:
+ Membuat bucket dan mengunggah file ke dalamnya.
+ Mengunduh objek dari bucket.
+ Menyalin objek ke subfolder di bucket.
+ Membuat daftar objek dalam bucket.
+ Menghapus objek bucket dan bucket tersebut.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/s3#code-examples). 
Tentukan struktur yang membungkus tindakan bucket dan objek yang digunakan oleh skenario.  

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"io"
	"log"
	"os"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// BucketBasics encapsulates the Amazon Simple Storage Service (Amazon S3) actions
// used in the examples.
// It contains S3Client, an Amazon S3 service client that is used to perform bucket
// and object actions.
type BucketBasics struct {
	S3Client *s3.Client
}



// ListBuckets lists the buckets in the current account.
func (basics BucketBasics) ListBuckets(ctx context.Context) ([]types.Bucket, error) {
	var err error
	var output *s3.ListBucketsOutput
	var buckets []types.Bucket
	bucketPaginator := s3.NewListBucketsPaginator(basics.S3Client, &s3.ListBucketsInput{})
	for bucketPaginator.HasMorePages() {
		output, err = bucketPaginator.NextPage(ctx)
		if err != nil {
			var apiErr smithy.APIError
			if errors.As(err, &apiErr) && apiErr.ErrorCode() == "AccessDenied" {
				fmt.Println("You don't have permission to list buckets for this account.")
				err = apiErr
			} else {
				log.Printf("Couldn't list buckets for your account. Here's why: %v\n", err)
			}
			break
		} else {
			buckets = append(buckets, output.Buckets...)
		}
	}
	return buckets, err
}



// BucketExists checks whether a bucket exists in the current account.
func (basics BucketBasics) BucketExists(ctx context.Context, bucketName string) (bool, error) {
	_, err := basics.S3Client.HeadBucket(ctx, &s3.HeadBucketInput{
		Bucket: aws.String(bucketName),
	})
	exists := true
	if err != nil {
		var apiError smithy.APIError
		if errors.As(err, &apiError) {
			switch apiError.(type) {
			case *types.NotFound:
				log.Printf("Bucket %v is available.\n", bucketName)
				exists = false
				err = nil
			default:
				log.Printf("Either you don't have access to bucket %v or another error occurred. "+
					"Here's what happened: %v\n", bucketName, err)
			}
		}
	} else {
		log.Printf("Bucket %v exists and you already own it.", bucketName)
	}

	return exists, err
}



// CreateBucket creates a bucket with the specified name in the specified Region.
func (basics BucketBasics) CreateBucket(ctx context.Context, name string, region string) error {
	_, err := basics.S3Client.CreateBucket(ctx, &s3.CreateBucketInput{
		Bucket: aws.String(name),
		CreateBucketConfiguration: &types.CreateBucketConfiguration{
			LocationConstraint: types.BucketLocationConstraint(region),
		},
	})
	if err != nil {
		var owned *types.BucketAlreadyOwnedByYou
		var exists *types.BucketAlreadyExists
		if errors.As(err, &owned) {
			log.Printf("You already own bucket %s.\n", name)
			err = owned
		} else if errors.As(err, &exists) {
			log.Printf("Bucket %s already exists.\n", name)
			err = exists
		}
	} else {
		err = s3.NewBucketExistsWaiter(basics.S3Client).Wait(
			ctx, &s3.HeadBucketInput{Bucket: aws.String(name)}, time.Minute)
		if err != nil {
			log.Printf("Failed attempt to wait for bucket %s to exist.\n", name)
		}
	}
	return err
}



// UploadFile reads from a file and puts the data into an object in a bucket.
func (basics BucketBasics) UploadFile(ctx context.Context, bucketName string, objectKey string, fileName string) error {
	file, err := os.Open(fileName)
	if err != nil {
		log.Printf("Couldn't open file %v to upload. Here's why: %v\n", fileName, err)
	} else {
		defer file.Close()
		_, err = basics.S3Client.PutObject(ctx, &s3.PutObjectInput{
			Bucket: aws.String(bucketName),
			Key:    aws.String(objectKey),
			Body:   file,
		})
		if err != nil {
			var apiErr smithy.APIError
			if errors.As(err, &apiErr) && apiErr.ErrorCode() == "EntityTooLarge" {
				log.Printf("Error while uploading object to %s. The object is too large.\n"+
					"To upload objects larger than 5GB, use the S3 console (160GB max)\n"+
					"or the multipart upload API (5TB max).", bucketName)
			} else {
				log.Printf("Couldn't upload file %v to %v:%v. Here's why: %v\n",
					fileName, bucketName, objectKey, err)
			}
		} else {
			err = s3.NewObjectExistsWaiter(basics.S3Client).Wait(
				ctx, &s3.HeadObjectInput{Bucket: aws.String(bucketName), Key: aws.String(objectKey)}, time.Minute)
			if err != nil {
				log.Printf("Failed attempt to wait for object %s to exist.\n", objectKey)
			}
		}
	}
	return err
}



// UploadLargeObject uses an upload manager to upload data to an object in a bucket.
// The upload manager breaks large data into parts and uploads the parts concurrently.
func (basics BucketBasics) UploadLargeObject(ctx context.Context, bucketName string, objectKey string, largeObject []byte) error {
	largeBuffer := bytes.NewReader(largeObject)
	var partMiBs int64 = 10
	uploader := manager.NewUploader(basics.S3Client, func(u *manager.Uploader) {
		u.PartSize = partMiBs * 1024 * 1024
	})
	_, err := uploader.Upload(ctx, &s3.PutObjectInput{
		Bucket: aws.String(bucketName),
		Key:    aws.String(objectKey),
		Body:   largeBuffer,
	})
	if err != nil {
		var apiErr smithy.APIError
		if errors.As(err, &apiErr) && apiErr.ErrorCode() == "EntityTooLarge" {
			log.Printf("Error while uploading object to %s. The object is too large.\n"+
				"The maximum size for a multipart upload is 5TB.", bucketName)
		} else {
			log.Printf("Couldn't upload large object to %v:%v. Here's why: %v\n",
				bucketName, objectKey, err)
		}
	} else {
		err = s3.NewObjectExistsWaiter(basics.S3Client).Wait(
			ctx, &s3.HeadObjectInput{Bucket: aws.String(bucketName), Key: aws.String(objectKey)}, time.Minute)
		if err != nil {
			log.Printf("Failed attempt to wait for object %s to exist.\n", objectKey)
		}
	}

	return err
}



// DownloadFile gets an object from a bucket and stores it in a local file.
func (basics BucketBasics) DownloadFile(ctx context.Context, bucketName string, objectKey string, fileName string) error {
	result, err := basics.S3Client.GetObject(ctx, &s3.GetObjectInput{
		Bucket: aws.String(bucketName),
		Key:    aws.String(objectKey),
	})
	if err != nil {
		var noKey *types.NoSuchKey
		if errors.As(err, &noKey) {
			log.Printf("Can't get object %s from bucket %s. No such key exists.\n", objectKey, bucketName)
			err = noKey
		} else {
			log.Printf("Couldn't get object %v:%v. Here's why: %v\n", bucketName, objectKey, err)
		}
		return err
	}
	defer result.Body.Close()
	file, err := os.Create(fileName)
	if err != nil {
		log.Printf("Couldn't create file %v. Here's why: %v\n", fileName, err)
		return err
	}
	defer file.Close()
	body, err := io.ReadAll(result.Body)
	if err != nil {
		log.Printf("Couldn't read object body from %v. Here's why: %v\n", objectKey, err)
	}
	_, err = file.Write(body)
	return err
}



// DownloadLargeObject uses a download manager to download an object from a bucket.
// The download manager gets the data in parts and writes them to a buffer until all of
// the data has been downloaded.
func (basics BucketBasics) DownloadLargeObject(ctx context.Context, bucketName string, objectKey string) ([]byte, error) {
	var partMiBs int64 = 10
	downloader := manager.NewDownloader(basics.S3Client, func(d *manager.Downloader) {
		d.PartSize = partMiBs * 1024 * 1024
	})
	buffer := manager.NewWriteAtBuffer([]byte{})
	_, err := downloader.Download(ctx, buffer, &s3.GetObjectInput{
		Bucket: aws.String(bucketName),
		Key:    aws.String(objectKey),
	})
	if err != nil {
		log.Printf("Couldn't download large object from %v:%v. Here's why: %v\n",
			bucketName, objectKey, err)
	}
	return buffer.Bytes(), err
}



// CopyToFolder copies an object in a bucket to a subfolder in the same bucket.
func (basics BucketBasics) CopyToFolder(ctx context.Context, bucketName string, objectKey string, folderName string) error {
	objectDest := fmt.Sprintf("%v/%v", folderName, objectKey)
	_, err := basics.S3Client.CopyObject(ctx, &s3.CopyObjectInput{
		Bucket:     aws.String(bucketName),
		CopySource: aws.String(fmt.Sprintf("%v/%v", bucketName, objectKey)),
		Key:        aws.String(objectDest),
	})
	if err != nil {
		var notActive *types.ObjectNotInActiveTierError
		if errors.As(err, &notActive) {
			log.Printf("Couldn't copy object %s from %s because the object isn't in the active tier.\n",
				objectKey, bucketName)
			err = notActive
		}
	} else {
		err = s3.NewObjectExistsWaiter(basics.S3Client).Wait(
			ctx, &s3.HeadObjectInput{Bucket: aws.String(bucketName), Key: aws.String(objectDest)}, time.Minute)
		if err != nil {
			log.Printf("Failed attempt to wait for object %s to exist.\n", objectDest)
		}
	}
	return err
}



// CopyToBucket copies an object in a bucket to another bucket.
func (basics BucketBasics) CopyToBucket(ctx context.Context, sourceBucket string, destinationBucket string, objectKey string) error {
	_, err := basics.S3Client.CopyObject(ctx, &s3.CopyObjectInput{
		Bucket:     aws.String(destinationBucket),
		CopySource: aws.String(fmt.Sprintf("%v/%v", sourceBucket, objectKey)),
		Key:        aws.String(objectKey),
	})
	if err != nil {
		var notActive *types.ObjectNotInActiveTierError
		if errors.As(err, &notActive) {
			log.Printf("Couldn't copy object %s from %s because the object isn't in the active tier.\n",
				objectKey, sourceBucket)
			err = notActive
		}
	} else {
		err = s3.NewObjectExistsWaiter(basics.S3Client).Wait(
			ctx, &s3.HeadObjectInput{Bucket: aws.String(destinationBucket), Key: aws.String(objectKey)}, time.Minute)
		if err != nil {
			log.Printf("Failed attempt to wait for object %s to exist.\n", objectKey)
		}
	}
	return err
}



// ListObjects lists the objects in a bucket.
func (basics BucketBasics) ListObjects(ctx context.Context, bucketName string) ([]types.Object, error) {
	var err error
	var output *s3.ListObjectsV2Output
	input := &s3.ListObjectsV2Input{
		Bucket: aws.String(bucketName),
	}
	var objects []types.Object
	objectPaginator := s3.NewListObjectsV2Paginator(basics.S3Client, input)
	for objectPaginator.HasMorePages() {
		output, err = objectPaginator.NextPage(ctx)
		if err != nil {
			var noBucket *types.NoSuchBucket
			if errors.As(err, &noBucket) {
				log.Printf("Bucket %s does not exist.\n", bucketName)
				err = noBucket
			}
			break
		} else {
			objects = append(objects, output.Contents...)
		}
	}
	return objects, err
}



// DeleteObjects deletes a list of objects from a bucket.
func (basics BucketBasics) DeleteObjects(ctx context.Context, bucketName string, objectKeys []string) error {
	var objectIds []types.ObjectIdentifier
	for _, key := range objectKeys {
		objectIds = append(objectIds, types.ObjectIdentifier{Key: aws.String(key)})
	}
	output, err := basics.S3Client.DeleteObjects(ctx, &s3.DeleteObjectsInput{
		Bucket: aws.String(bucketName),
		Delete: &types.Delete{Objects: objectIds, Quiet: aws.Bool(true)},
	})
	if err != nil || len(output.Errors) > 0 {
		log.Printf("Error deleting objects from bucket %s.\n", bucketName)
		if err != nil {
			var noBucket *types.NoSuchBucket
			if errors.As(err, &noBucket) {
				log.Printf("Bucket %s does not exist.\n", bucketName)
				err = noBucket
			}
		} else if len(output.Errors) > 0 {
			for _, outErr := range output.Errors {
				log.Printf("%s: %s\n", *outErr.Key, *outErr.Message)
			}
			err = fmt.Errorf("%s", *output.Errors[0].Message)
		}
	} else {
		for _, delObjs := range output.Deleted {
			err = s3.NewObjectNotExistsWaiter(basics.S3Client).Wait(
				ctx, &s3.HeadObjectInput{Bucket: aws.String(bucketName), Key: delObjs.Key}, time.Minute)
			if err != nil {
				log.Printf("Failed attempt to wait for object %s to be deleted.\n", *delObjs.Key)
			} else {
				log.Printf("Deleted %s.\n", *delObjs.Key)
			}
		}
	}
	return err
}



// DeleteBucket deletes a bucket. The bucket must be empty or an error is returned.
func (basics BucketBasics) DeleteBucket(ctx context.Context, bucketName string) error {
	_, err := basics.S3Client.DeleteBucket(ctx, &s3.DeleteBucketInput{
		Bucket: aws.String(bucketName)})
	if err != nil {
		var noBucket *types.NoSuchBucket
		if errors.As(err, &noBucket) {
			log.Printf("Bucket %s does not exist.\n", bucketName)
			err = noBucket
		} else {
			log.Printf("Couldn't delete bucket %v. Here's why: %v\n", bucketName, err)
		}
	} else {
		err = s3.NewBucketNotExistsWaiter(basics.S3Client).Wait(
			ctx, &s3.HeadBucketInput{Bucket: aws.String(bucketName)}, time.Minute)
		if err != nil {
			log.Printf("Failed attempt to wait for bucket %s to be deleted.\n", bucketName)
		} else {
			log.Printf("Deleted %s.\n", bucketName)
		}
	}
	return err
}
```
Jalankan skenario interaktif yang menunjukkan cara bekerja dengan bucket dan objek S3.  

```
import (
	"context"
	"fmt"
	"log"
	"os"
	"strings"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/awsdocs/aws-doc-sdk-examples/gov2/demotools"
	"github.com/awsdocs/aws-doc-sdk-examples/gov2/s3/actions"
)

// RunGetStartedScenario is an interactive example that shows you how to use Amazon
// Simple Storage Service (Amazon S3) to create an S3 bucket and use it to store objects.
//
// 1. Create a bucket.
// 2. Upload a local file to the bucket.
// 3. Download an object to a local file.
// 4. Copy an object to a different folder in the bucket.
// 5. List objects in the bucket.
// 6. Delete all objects in the bucket.
// 7. Delete the bucket.
//
// This example creates an Amazon S3 service client from the specified sdkConfig so that
// you can replace it with a mocked or stubbed config for unit testing.
//
// It uses a questioner from the `demotools` package to get input during the example.
// This package can be found in the ..\..\demotools folder of this repo.
func RunGetStartedScenario(ctx context.Context, sdkConfig aws.Config, questioner demotools.IQuestioner) {
	defer func() {
		if r := recover(); r != nil {
			log.Println("Something went wrong with the demo.")
			_, isMock := questioner.(*demotools.MockQuestioner)
			if isMock || questioner.AskBool("Do you want to see the full error message (y/n)?", "y") {
				log.Println(r)
			}
		}
	}()

	log.Println(strings.Repeat("-", 88))
	log.Println("Welcome to the Amazon S3 getting started demo.")
	log.Println(strings.Repeat("-", 88))

	s3Client := s3.NewFromConfig(sdkConfig)
	bucketBasics := actions.BucketBasics{S3Client: s3Client}

	count := 10
	log.Printf("Let's list up to %v buckets for your account:", count)
	buckets, err := bucketBasics.ListBuckets(ctx)
	if err != nil {
		panic(err)
	}
	if len(buckets) == 0 {
		log.Println("You don't have any buckets!")
	} else {
		if count > len(buckets) {
			count = len(buckets)
		}
		for _, bucket := range buckets[:count] {
			log.Printf("\t%v\n", *bucket.Name)
		}
	}

	bucketName := questioner.Ask("Let's create a bucket. Enter a name for your bucket:",
		demotools.NotEmpty{})
	bucketExists, err := bucketBasics.BucketExists(ctx, bucketName)
	if err != nil {
		panic(err)
	}
	if !bucketExists {
		err = bucketBasics.CreateBucket(ctx, bucketName, sdkConfig.Region)
		if err != nil {
			panic(err)
		} else {
			log.Println("Bucket created.")
		}
	}
	log.Println(strings.Repeat("-", 88))

	fmt.Println("Let's upload a file to your bucket.")
	smallFile := questioner.Ask("Enter the path to a file you want to upload:",
		demotools.NotEmpty{})
	const smallKey = "doc-example-key"
	err = bucketBasics.UploadFile(ctx, bucketName, smallKey, smallFile)
	if err != nil {
		panic(err)
	}
	log.Printf("Uploaded %v as %v.\n", smallFile, smallKey)
	log.Println(strings.Repeat("-", 88))

	log.Printf("Let's download %v to a file.", smallKey)
	downloadFileName := questioner.Ask("Enter a name for the downloaded file:", demotools.NotEmpty{})
	err = bucketBasics.DownloadFile(ctx, bucketName, smallKey, downloadFileName)
	if err != nil {
		panic(err)
	}
	log.Printf("File %v downloaded.", downloadFileName)
	log.Println(strings.Repeat("-", 88))

	log.Printf("Let's copy %v to a folder in the same bucket.", smallKey)
	folderName := questioner.Ask("Enter a folder name: ", demotools.NotEmpty{})
	err = bucketBasics.CopyToFolder(ctx, bucketName, smallKey, folderName)
	if err != nil {
		panic(err)
	}
	log.Printf("Copied %v to %v/%v.\n", smallKey, folderName, smallKey)
	log.Println(strings.Repeat("-", 88))

	log.Println("Let's list the objects in your bucket.")
	questioner.Ask("Press Enter when you're ready.")
	objects, err := bucketBasics.ListObjects(ctx, bucketName)
	if err != nil {
		panic(err)
	}
	log.Printf("Found %v objects.\n", len(objects))
	var objKeys []string
	for _, object := range objects {
		objKeys = append(objKeys, *object.Key)
		log.Printf("\t%v\n", *object.Key)
	}
	log.Println(strings.Repeat("-", 88))

	if questioner.AskBool("Do you want to delete your bucket and all of its "+
		"contents? (y/n)", "y") {
		log.Println("Deleting objects.")
		err = bucketBasics.DeleteObjects(ctx, bucketName, objKeys)
		if err != nil {
			panic(err)
		}
		log.Println("Deleting bucket.")
		err = bucketBasics.DeleteBucket(ctx, bucketName)
		if err != nil {
			panic(err)
		}
		log.Printf("Deleting downloaded file %v.\n", downloadFileName)
		err = os.Remove(downloadFileName)
		if err != nil {
			panic(err)
		}
	} else {
		log.Println("Okay. Don't forget to delete objects from your bucket to avoid charges.")
	}
	log.Println(strings.Repeat("-", 88))

	log.Println("Thanks for watching!")
	log.Println(strings.Repeat("-", 88))
}
```
+ Untuk detail API, lihat topik berikut di *Referensi API AWS SDK untuk Go *.
  + [CopyObject](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.CopyObject)
  + [CreateBucket](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.CreateBucket)
  + [DeleteBucket](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.DeleteBucket)
  + [DeleteObjects](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.DeleteObjects)
  + [GetObject](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.GetObject)
  + [ListObjectsV2](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.ListObjectsV2)
  + [PutObject](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.PutObject)

## Tindakan
<a name="actions"></a>

### `CopyObject`
<a name="s3_CopyObject_go_2_topic"></a>

Contoh kode berikut menunjukkan cara menggunakan`CopyObject`.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/s3#code-examples). 

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"io"
	"log"
	"os"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// BucketBasics encapsulates the Amazon Simple Storage Service (Amazon S3) actions
// used in the examples.
// It contains S3Client, an Amazon S3 service client that is used to perform bucket
// and object actions.
type BucketBasics struct {
	S3Client *s3.Client
}



// CopyToBucket copies an object in a bucket to another bucket.
func (basics BucketBasics) CopyToBucket(ctx context.Context, sourceBucket string, destinationBucket string, objectKey string) error {
	_, err := basics.S3Client.CopyObject(ctx, &s3.CopyObjectInput{
		Bucket:     aws.String(destinationBucket),
		CopySource: aws.String(fmt.Sprintf("%v/%v", sourceBucket, objectKey)),
		Key:        aws.String(objectKey),
	})
	if err != nil {
		var notActive *types.ObjectNotInActiveTierError
		if errors.As(err, &notActive) {
			log.Printf("Couldn't copy object %s from %s because the object isn't in the active tier.\n",
				objectKey, sourceBucket)
			err = notActive
		}
	} else {
		err = s3.NewObjectExistsWaiter(basics.S3Client).Wait(
			ctx, &s3.HeadObjectInput{Bucket: aws.String(destinationBucket), Key: aws.String(objectKey)}, time.Minute)
		if err != nil {
			log.Printf("Failed attempt to wait for object %s to exist.\n", objectKey)
		}
	}
	return err
}
```
+  Untuk detail API, lihat [CopyObject](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.CopyObject)di *Referensi AWS SDK untuk Go API*. 

### `CreateBucket`
<a name="s3_CreateBucket_go_2_topic"></a>

Contoh kode berikut menunjukkan cara menggunakan`CreateBucket`.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/s3#code-examples). 
Buat bucket dengan konfigurasi default.  

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"io"
	"log"
	"os"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// BucketBasics encapsulates the Amazon Simple Storage Service (Amazon S3) actions
// used in the examples.
// It contains S3Client, an Amazon S3 service client that is used to perform bucket
// and object actions.
type BucketBasics struct {
	S3Client *s3.Client
}



// CreateBucket creates a bucket with the specified name in the specified Region.
func (basics BucketBasics) CreateBucket(ctx context.Context, name string, region string) error {
	_, err := basics.S3Client.CreateBucket(ctx, &s3.CreateBucketInput{
		Bucket: aws.String(name),
		CreateBucketConfiguration: &types.CreateBucketConfiguration{
			LocationConstraint: types.BucketLocationConstraint(region),
		},
	})
	if err != nil {
		var owned *types.BucketAlreadyOwnedByYou
		var exists *types.BucketAlreadyExists
		if errors.As(err, &owned) {
			log.Printf("You already own bucket %s.\n", name)
			err = owned
		} else if errors.As(err, &exists) {
			log.Printf("Bucket %s already exists.\n", name)
			err = exists
		}
	} else {
		err = s3.NewBucketExistsWaiter(basics.S3Client).Wait(
			ctx, &s3.HeadBucketInput{Bucket: aws.String(name)}, time.Minute)
		if err != nil {
			log.Printf("Failed attempt to wait for bucket %s to exist.\n", name)
		}
	}
	return err
}
```
Buat ember dengan penguncian objek dan tunggu sampai ada.  

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"log"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// S3Actions wraps S3 service actions.
type S3Actions struct {
	S3Client  *s3.Client
	S3Manager *manager.Uploader
}



// CreateBucketWithLock creates a new S3 bucket with optional object locking enabled
// and waits for the bucket to exist before returning.
func (actor S3Actions) CreateBucketWithLock(ctx context.Context, bucket string, region string, enableObjectLock bool) (string, error) {
	input := &s3.CreateBucketInput{
		Bucket: aws.String(bucket),
		CreateBucketConfiguration: &types.CreateBucketConfiguration{
			LocationConstraint: types.BucketLocationConstraint(region),
		},
	}

	if enableObjectLock {
		input.ObjectLockEnabledForBucket = aws.Bool(true)
	}

	_, err := actor.S3Client.CreateBucket(ctx, input)
	if err != nil {
		var owned *types.BucketAlreadyOwnedByYou
		var exists *types.BucketAlreadyExists
		if errors.As(err, &owned) {
			log.Printf("You already own bucket %s.\n", bucket)
			err = owned
		} else if errors.As(err, &exists) {
			log.Printf("Bucket %s already exists.\n", bucket)
			err = exists
		}
	} else {
		err = s3.NewBucketExistsWaiter(actor.S3Client).Wait(
			ctx, &s3.HeadBucketInput{Bucket: aws.String(bucket)}, time.Minute)
		if err != nil {
			log.Printf("Failed attempt to wait for bucket %s to exist.\n", bucket)
		}
	}

	return bucket, err
}
```
+  Untuk detail API, lihat [CreateBucket](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.CreateBucket)di *Referensi AWS SDK untuk Go API*. 

### `DeleteBucket`
<a name="s3_DeleteBucket_go_2_topic"></a>

Contoh kode berikut menunjukkan cara menggunakan`DeleteBucket`.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/s3#code-examples). 

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"io"
	"log"
	"os"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// BucketBasics encapsulates the Amazon Simple Storage Service (Amazon S3) actions
// used in the examples.
// It contains S3Client, an Amazon S3 service client that is used to perform bucket
// and object actions.
type BucketBasics struct {
	S3Client *s3.Client
}



// DeleteBucket deletes a bucket. The bucket must be empty or an error is returned.
func (basics BucketBasics) DeleteBucket(ctx context.Context, bucketName string) error {
	_, err := basics.S3Client.DeleteBucket(ctx, &s3.DeleteBucketInput{
		Bucket: aws.String(bucketName)})
	if err != nil {
		var noBucket *types.NoSuchBucket
		if errors.As(err, &noBucket) {
			log.Printf("Bucket %s does not exist.\n", bucketName)
			err = noBucket
		} else {
			log.Printf("Couldn't delete bucket %v. Here's why: %v\n", bucketName, err)
		}
	} else {
		err = s3.NewBucketNotExistsWaiter(basics.S3Client).Wait(
			ctx, &s3.HeadBucketInput{Bucket: aws.String(bucketName)}, time.Minute)
		if err != nil {
			log.Printf("Failed attempt to wait for bucket %s to be deleted.\n", bucketName)
		} else {
			log.Printf("Deleted %s.\n", bucketName)
		}
	}
	return err
}
```
+  Untuk detail API, lihat [DeleteBucket](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.DeleteBucket)di *Referensi AWS SDK untuk Go API*. 

### `DeleteObject`
<a name="s3_DeleteObject_go_2_topic"></a>

Contoh kode berikut menunjukkan cara menggunakan`DeleteObject`.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/workflows/s3_object_lock#code-examples). 

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"log"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// S3Actions wraps S3 service actions.
type S3Actions struct {
	S3Client  *s3.Client
	S3Manager *manager.Uploader
}



// DeleteObject deletes an object from a bucket.
func (actor S3Actions) DeleteObject(ctx context.Context, bucket string, key string, versionId string, bypassGovernance bool) (bool, error) {
	deleted := false
	input := &s3.DeleteObjectInput{
		Bucket: aws.String(bucket),
		Key:    aws.String(key),
	}
	if versionId != "" {
		input.VersionId = aws.String(versionId)
	}
	if bypassGovernance {
		input.BypassGovernanceRetention = aws.Bool(true)
	}
	_, err := actor.S3Client.DeleteObject(ctx, input)
	if err != nil {
		var noKey *types.NoSuchKey
		var apiErr *smithy.GenericAPIError
		if errors.As(err, &noKey) {
			log.Printf("Object %s does not exist in %s.\n", key, bucket)
			err = noKey
		} else if errors.As(err, &apiErr) {
			switch apiErr.ErrorCode() {
			case "AccessDenied":
				log.Printf("Access denied: cannot delete object %s from %s.\n", key, bucket)
				err = nil
			case "InvalidArgument":
				if bypassGovernance {
					log.Printf("You cannot specify bypass governance on a bucket without lock enabled.")
					err = nil
				}
			}
		}
	} else {
		err = s3.NewObjectNotExistsWaiter(actor.S3Client).Wait(
			ctx, &s3.HeadObjectInput{Bucket: aws.String(bucket), Key: aws.String(key)}, time.Minute)
		if err != nil {
			log.Printf("Failed attempt to wait for object %s in bucket %s to be deleted.\n", key, bucket)
		} else {
			deleted = true
		}
	}
	return deleted, err
}
```
+  Untuk detail API, lihat [DeleteObject](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.DeleteObject)di *Referensi AWS SDK untuk Go API*. 

### `DeleteObjects`
<a name="s3_DeleteObjects_go_2_topic"></a>

Contoh kode berikut menunjukkan cara menggunakan`DeleteObjects`.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/workflows/s3_object_lock#code-examples). 

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"log"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// S3Actions wraps S3 service actions.
type S3Actions struct {
	S3Client  *s3.Client
	S3Manager *manager.Uploader
}



// DeleteObjects deletes a list of objects from a bucket.
func (actor S3Actions) DeleteObjects(ctx context.Context, bucket string, objects []types.ObjectIdentifier, bypassGovernance bool) error {
	if len(objects) == 0 {
		return nil
	}

	input := s3.DeleteObjectsInput{
		Bucket: aws.String(bucket),
		Delete: &types.Delete{
			Objects: objects,
			Quiet:   aws.Bool(true),
		},
	}
	if bypassGovernance {
		input.BypassGovernanceRetention = aws.Bool(true)
	}
	delOut, err := actor.S3Client.DeleteObjects(ctx, &input)
	if err != nil || len(delOut.Errors) > 0 {
		log.Printf("Error deleting objects from bucket %s.\n", bucket)
		if err != nil {
			var noBucket *types.NoSuchBucket
			if errors.As(err, &noBucket) {
				log.Printf("Bucket %s does not exist.\n", bucket)
				err = noBucket
			}
		} else if len(delOut.Errors) > 0 {
			for _, outErr := range delOut.Errors {
				log.Printf("%s: %s\n", *outErr.Key, *outErr.Message)
			}
			err = fmt.Errorf("%s", *delOut.Errors[0].Message)
		}
	} else {
		for _, delObjs := range delOut.Deleted {
			err = s3.NewObjectNotExistsWaiter(actor.S3Client).Wait(
				ctx, &s3.HeadObjectInput{Bucket: aws.String(bucket), Key: delObjs.Key}, time.Minute)
			if err != nil {
				log.Printf("Failed attempt to wait for object %s to be deleted.\n", *delObjs.Key)
			} else {
				log.Printf("Deleted %s.\n", *delObjs.Key)
			}
		}
	}
	return err
}
```
+  Untuk detail API, lihat [DeleteObjects](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.DeleteObjects)di *Referensi AWS SDK untuk Go API*. 

### `GetObject`
<a name="s3_GetObject_go_2_topic"></a>

Contoh kode berikut menunjukkan cara menggunakan`GetObject`.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/s3#code-examples). 

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"io"
	"log"
	"os"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// BucketBasics encapsulates the Amazon Simple Storage Service (Amazon S3) actions
// used in the examples.
// It contains S3Client, an Amazon S3 service client that is used to perform bucket
// and object actions.
type BucketBasics struct {
	S3Client *s3.Client
}



// DownloadFile gets an object from a bucket and stores it in a local file.
func (basics BucketBasics) DownloadFile(ctx context.Context, bucketName string, objectKey string, fileName string) error {
	result, err := basics.S3Client.GetObject(ctx, &s3.GetObjectInput{
		Bucket: aws.String(bucketName),
		Key:    aws.String(objectKey),
	})
	if err != nil {
		var noKey *types.NoSuchKey
		if errors.As(err, &noKey) {
			log.Printf("Can't get object %s from bucket %s. No such key exists.\n", objectKey, bucketName)
			err = noKey
		} else {
			log.Printf("Couldn't get object %v:%v. Here's why: %v\n", bucketName, objectKey, err)
		}
		return err
	}
	defer result.Body.Close()
	file, err := os.Create(fileName)
	if err != nil {
		log.Printf("Couldn't create file %v. Here's why: %v\n", fileName, err)
		return err
	}
	defer file.Close()
	body, err := io.ReadAll(result.Body)
	if err != nil {
		log.Printf("Couldn't read object body from %v. Here's why: %v\n", objectKey, err)
	}
	_, err = file.Write(body)
	return err
}
```
+  Untuk detail API, lihat [GetObject](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.GetObject)di *Referensi AWS SDK untuk Go API*. 

### `GetObjectLegalHold`
<a name="s3_GetObjectLegalHold_go_2_topic"></a>

Contoh kode berikut menunjukkan cara menggunakan`GetObjectLegalHold`.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/workflows/s3_object_lock#code-examples). 

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"log"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// S3Actions wraps S3 service actions.
type S3Actions struct {
	S3Client  *s3.Client
	S3Manager *manager.Uploader
}



// GetObjectLegalHold retrieves the legal hold status for an S3 object.
func (actor S3Actions) GetObjectLegalHold(ctx context.Context, bucket string, key string, versionId string) (*types.ObjectLockLegalHoldStatus, error) {
	var status *types.ObjectLockLegalHoldStatus
	input := &s3.GetObjectLegalHoldInput{
		Bucket:    aws.String(bucket),
		Key:       aws.String(key),
		VersionId: aws.String(versionId),
	}

	output, err := actor.S3Client.GetObjectLegalHold(ctx, input)
	if err != nil {
		var noSuchKeyErr *types.NoSuchKey
		var apiErr *smithy.GenericAPIError
		if errors.As(err, &noSuchKeyErr) {
			log.Printf("Object %s does not exist in bucket %s.\n", key, bucket)
			err = noSuchKeyErr
		} else if errors.As(err, &apiErr) {
			switch apiErr.ErrorCode() {
			case "NoSuchObjectLockConfiguration":
				log.Printf("Object %s does not have an object lock configuration.\n", key)
				err = nil
			case "InvalidRequest":
				log.Printf("Bucket %s does not have an object lock configuration.\n", bucket)
				err = nil
			}
		}
	} else {
		status = &output.LegalHold.Status
	}

	return status, err
}
```
+  Untuk detail API, lihat [GetObjectLegalHold](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.GetObjectLegalHold)di *Referensi AWS SDK untuk Go API*. 

### `GetObjectLockConfiguration`
<a name="s3_GetObjectLockConfiguration_go_2_topic"></a>

Contoh kode berikut menunjukkan cara menggunakan`GetObjectLockConfiguration`.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/workflows/s3_object_lock#code-examples). 

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"log"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// S3Actions wraps S3 service actions.
type S3Actions struct {
	S3Client  *s3.Client
	S3Manager *manager.Uploader
}



// GetObjectLockConfiguration retrieves the object lock configuration for an S3 bucket.
func (actor S3Actions) GetObjectLockConfiguration(ctx context.Context, bucket string) (*types.ObjectLockConfiguration, error) {
	var lockConfig *types.ObjectLockConfiguration
	input := &s3.GetObjectLockConfigurationInput{
		Bucket: aws.String(bucket),
	}

	output, err := actor.S3Client.GetObjectLockConfiguration(ctx, input)
	if err != nil {
		var noBucket *types.NoSuchBucket
		var apiErr *smithy.GenericAPIError
		if errors.As(err, &noBucket) {
			log.Printf("Bucket %s does not exist.\n", bucket)
			err = noBucket
		} else if errors.As(err, &apiErr) && apiErr.ErrorCode() == "ObjectLockConfigurationNotFoundError" {
			log.Printf("Bucket %s does not have an object lock configuration.\n", bucket)
			err = nil
		}
	} else {
		lockConfig = output.ObjectLockConfiguration
	}

	return lockConfig, err
}
```
+  Untuk detail API, lihat [GetObjectLockConfiguration](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.GetObjectLockConfiguration)di *Referensi AWS SDK untuk Go API*. 

### `GetObjectRetention`
<a name="s3_GetObjectRetention_go_2_topic"></a>

Contoh kode berikut menunjukkan cara menggunakan`GetObjectRetention`.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/workflows/s3_object_lock#code-examples). 

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"log"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// S3Actions wraps S3 service actions.
type S3Actions struct {
	S3Client  *s3.Client
	S3Manager *manager.Uploader
}



// GetObjectRetention retrieves the object retention configuration for an S3 object.
func (actor S3Actions) GetObjectRetention(ctx context.Context, bucket string, key string) (*types.ObjectLockRetention, error) {
	var retention *types.ObjectLockRetention
	input := &s3.GetObjectRetentionInput{
		Bucket: aws.String(bucket),
		Key:    aws.String(key),
	}

	output, err := actor.S3Client.GetObjectRetention(ctx, input)
	if err != nil {
		var noKey *types.NoSuchKey
		var apiErr *smithy.GenericAPIError
		if errors.As(err, &noKey) {
			log.Printf("Object %s does not exist in bucket %s.\n", key, bucket)
			err = noKey
		} else if errors.As(err, &apiErr) {
			switch apiErr.ErrorCode() {
			case "NoSuchObjectLockConfiguration":
				err = nil
			case "InvalidRequest":
				log.Printf("Bucket %s does not have locking enabled.", bucket)
				err = nil
			}
		}
	} else {
		retention = output.Retention
	}

	return retention, err
}
```
+  Untuk detail API, lihat [GetObjectRetention](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.GetObjectRetention)di *Referensi AWS SDK untuk Go API*. 

### `HeadBucket`
<a name="s3_HeadBucket_go_2_topic"></a>

Contoh kode berikut menunjukkan cara menggunakan`HeadBucket`.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/s3#code-examples). 

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"io"
	"log"
	"os"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// BucketBasics encapsulates the Amazon Simple Storage Service (Amazon S3) actions
// used in the examples.
// It contains S3Client, an Amazon S3 service client that is used to perform bucket
// and object actions.
type BucketBasics struct {
	S3Client *s3.Client
}



// BucketExists checks whether a bucket exists in the current account.
func (basics BucketBasics) BucketExists(ctx context.Context, bucketName string) (bool, error) {
	_, err := basics.S3Client.HeadBucket(ctx, &s3.HeadBucketInput{
		Bucket: aws.String(bucketName),
	})
	exists := true
	if err != nil {
		var apiError smithy.APIError
		if errors.As(err, &apiError) {
			switch apiError.(type) {
			case *types.NotFound:
				log.Printf("Bucket %v is available.\n", bucketName)
				exists = false
				err = nil
			default:
				log.Printf("Either you don't have access to bucket %v or another error occurred. "+
					"Here's what happened: %v\n", bucketName, err)
			}
		}
	} else {
		log.Printf("Bucket %v exists and you already own it.", bucketName)
	}

	return exists, err
}
```
+  Untuk detail API, lihat [HeadBucket](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.HeadBucket)di *Referensi AWS SDK untuk Go API*. 

### `ListBuckets`
<a name="s3_ListBuckets_go_2_topic"></a>

Contoh kode berikut menunjukkan cara menggunakan`ListBuckets`.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/s3#code-examples). 

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"io"
	"log"
	"os"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// BucketBasics encapsulates the Amazon Simple Storage Service (Amazon S3) actions
// used in the examples.
// It contains S3Client, an Amazon S3 service client that is used to perform bucket
// and object actions.
type BucketBasics struct {
	S3Client *s3.Client
}



// ListBuckets lists the buckets in the current account.
func (basics BucketBasics) ListBuckets(ctx context.Context) ([]types.Bucket, error) {
	var err error
	var output *s3.ListBucketsOutput
	var buckets []types.Bucket
	bucketPaginator := s3.NewListBucketsPaginator(basics.S3Client, &s3.ListBucketsInput{})
	for bucketPaginator.HasMorePages() {
		output, err = bucketPaginator.NextPage(ctx)
		if err != nil {
			var apiErr smithy.APIError
			if errors.As(err, &apiErr) && apiErr.ErrorCode() == "AccessDenied" {
				fmt.Println("You don't have permission to list buckets for this account.")
				err = apiErr
			} else {
				log.Printf("Couldn't list buckets for your account. Here's why: %v\n", err)
			}
			break
		} else {
			buckets = append(buckets, output.Buckets...)
		}
	}
	return buckets, err
}
```
+  Untuk detail API, lihat [ListBuckets](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.ListBuckets)di *Referensi AWS SDK untuk Go API*. 

### `ListObjectVersions`
<a name="s3_ListObjectVersions_go_2_topic"></a>

Contoh kode berikut menunjukkan cara menggunakan`ListObjectVersions`.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/workflows/s3_object_lock#code-examples). 

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"log"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// S3Actions wraps S3 service actions.
type S3Actions struct {
	S3Client  *s3.Client
	S3Manager *manager.Uploader
}



// ListObjectVersions lists all versions of all objects in a bucket.
func (actor S3Actions) ListObjectVersions(ctx context.Context, bucket string) ([]types.ObjectVersion, error) {
	var err error
	var output *s3.ListObjectVersionsOutput
	var versions []types.ObjectVersion
	input := &s3.ListObjectVersionsInput{Bucket: aws.String(bucket)}
	versionPaginator := s3.NewListObjectVersionsPaginator(actor.S3Client, input)
	for versionPaginator.HasMorePages() {
		output, err = versionPaginator.NextPage(ctx)
		if err != nil {
			var noBucket *types.NoSuchBucket
			if errors.As(err, &noBucket) {
				log.Printf("Bucket %s does not exist.\n", bucket)
				err = noBucket
			}
			break
		} else {
			versions = append(versions, output.Versions...)
		}
	}
	return versions, err
}
```
+  Untuk detail API, lihat [ListObjectVersions](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.ListObjectVersions)di *Referensi AWS SDK untuk Go API*. 

### `ListObjectsV2`
<a name="s3_ListObjectsV2_go_2_topic"></a>

Contoh kode berikut menunjukkan cara menggunakan`ListObjectsV2`.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/s3#code-examples). 

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"io"
	"log"
	"os"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// BucketBasics encapsulates the Amazon Simple Storage Service (Amazon S3) actions
// used in the examples.
// It contains S3Client, an Amazon S3 service client that is used to perform bucket
// and object actions.
type BucketBasics struct {
	S3Client *s3.Client
}



// ListObjects lists the objects in a bucket.
func (basics BucketBasics) ListObjects(ctx context.Context, bucketName string) ([]types.Object, error) {
	var err error
	var output *s3.ListObjectsV2Output
	input := &s3.ListObjectsV2Input{
		Bucket: aws.String(bucketName),
	}
	var objects []types.Object
	objectPaginator := s3.NewListObjectsV2Paginator(basics.S3Client, input)
	for objectPaginator.HasMorePages() {
		output, err = objectPaginator.NextPage(ctx)
		if err != nil {
			var noBucket *types.NoSuchBucket
			if errors.As(err, &noBucket) {
				log.Printf("Bucket %s does not exist.\n", bucketName)
				err = noBucket
			}
			break
		} else {
			objects = append(objects, output.Contents...)
		}
	}
	return objects, err
}
```
+  Untuk detail API, lihat [ListObjectsV2](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.ListObjectsV2) di *Referensi AWS SDK untuk Go API*. 

### `PutObject`
<a name="s3_PutObject_go_2_topic"></a>

Contoh kode berikut menunjukkan cara menggunakan`PutObject`.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/s3#code-examples). 
Masukkan objek ke dalam ember dengan menggunakan API tingkat rendah.  

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"io"
	"log"
	"os"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// BucketBasics encapsulates the Amazon Simple Storage Service (Amazon S3) actions
// used in the examples.
// It contains S3Client, an Amazon S3 service client that is used to perform bucket
// and object actions.
type BucketBasics struct {
	S3Client *s3.Client
}



// UploadFile reads from a file and puts the data into an object in a bucket.
func (basics BucketBasics) UploadFile(ctx context.Context, bucketName string, objectKey string, fileName string) error {
	file, err := os.Open(fileName)
	if err != nil {
		log.Printf("Couldn't open file %v to upload. Here's why: %v\n", fileName, err)
	} else {
		defer file.Close()
		_, err = basics.S3Client.PutObject(ctx, &s3.PutObjectInput{
			Bucket: aws.String(bucketName),
			Key:    aws.String(objectKey),
			Body:   file,
		})
		if err != nil {
			var apiErr smithy.APIError
			if errors.As(err, &apiErr) && apiErr.ErrorCode() == "EntityTooLarge" {
				log.Printf("Error while uploading object to %s. The object is too large.\n"+
					"To upload objects larger than 5GB, use the S3 console (160GB max)\n"+
					"or the multipart upload API (5TB max).", bucketName)
			} else {
				log.Printf("Couldn't upload file %v to %v:%v. Here's why: %v\n",
					fileName, bucketName, objectKey, err)
			}
		} else {
			err = s3.NewObjectExistsWaiter(basics.S3Client).Wait(
				ctx, &s3.HeadObjectInput{Bucket: aws.String(bucketName), Key: aws.String(objectKey)}, time.Minute)
			if err != nil {
				log.Printf("Failed attempt to wait for object %s to exist.\n", objectKey)
			}
		}
	}
	return err
}
```
Unggah objek ke bucket dengan menggunakan manajer transfer.  

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"log"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// S3Actions wraps S3 service actions.
type S3Actions struct {
	S3Client  *s3.Client
	S3Manager *manager.Uploader
}



// UploadObject uses the S3 upload manager to upload an object to a bucket.
func (actor S3Actions) UploadObject(ctx context.Context, bucket string, key string, contents string) (string, error) {
	var outKey string
	input := &s3.PutObjectInput{
		Bucket:            aws.String(bucket),
		Key:               aws.String(key),
		Body:              bytes.NewReader([]byte(contents)),
		ChecksumAlgorithm: types.ChecksumAlgorithmSha256,
	}
	output, err := actor.S3Manager.Upload(ctx, input)
	if err != nil {
		var noBucket *types.NoSuchBucket
		if errors.As(err, &noBucket) {
			log.Printf("Bucket %s does not exist.\n", bucket)
			err = noBucket
		}
	} else {
		err := s3.NewObjectExistsWaiter(actor.S3Client).Wait(ctx, &s3.HeadObjectInput{
			Bucket: aws.String(bucket),
			Key:    aws.String(key),
		}, time.Minute)
		if err != nil {
			log.Printf("Failed attempt to wait for object %s to exist in %s.\n", key, bucket)
		} else {
			outKey = *output.Key
		}
	}
	return outKey, err
}
```
+  Untuk detail API, lihat [PutObject](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.PutObject)di *Referensi AWS SDK untuk Go API*. 

### `PutObjectLegalHold`
<a name="s3_PutObjectLegalHold_go_2_topic"></a>

Contoh kode berikut menunjukkan cara menggunakan`PutObjectLegalHold`.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/workflows/s3_object_lock#code-examples). 

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"log"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// S3Actions wraps S3 service actions.
type S3Actions struct {
	S3Client  *s3.Client
	S3Manager *manager.Uploader
}



// PutObjectLegalHold sets the legal hold configuration for an S3 object.
func (actor S3Actions) PutObjectLegalHold(ctx context.Context, bucket string, key string, versionId string, legalHoldStatus types.ObjectLockLegalHoldStatus) error {
	input := &s3.PutObjectLegalHoldInput{
		Bucket: aws.String(bucket),
		Key:    aws.String(key),
		LegalHold: &types.ObjectLockLegalHold{
			Status: legalHoldStatus,
		},
	}
	if versionId != "" {
		input.VersionId = aws.String(versionId)
	}

	_, err := actor.S3Client.PutObjectLegalHold(ctx, input)
	if err != nil {
		var noKey *types.NoSuchKey
		if errors.As(err, &noKey) {
			log.Printf("Object %s does not exist in bucket %s.\n", key, bucket)
			err = noKey
		}
	}

	return err
}
```
+  Untuk detail API, lihat [PutObjectLegalHold](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.PutObjectLegalHold)di *Referensi AWS SDK untuk Go API*. 

### `PutObjectLockConfiguration`
<a name="s3_PutObjectLockConfiguration_go_2_topic"></a>

Contoh kode berikut menunjukkan cara menggunakan`PutObjectLockConfiguration`.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/workflows/s3_object_lock#code-examples). 
Atur konfigurasi kunci objek dari ember.  

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"log"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// S3Actions wraps S3 service actions.
type S3Actions struct {
	S3Client  *s3.Client
	S3Manager *manager.Uploader
}



// EnableObjectLockOnBucket enables object locking on an existing bucket.
func (actor S3Actions) EnableObjectLockOnBucket(ctx context.Context, bucket string) error {
	// Versioning must be enabled on the bucket before object locking is enabled.
	verInput := &s3.PutBucketVersioningInput{
		Bucket: aws.String(bucket),
		VersioningConfiguration: &types.VersioningConfiguration{
			MFADelete: types.MFADeleteDisabled,
			Status:    types.BucketVersioningStatusEnabled,
		},
	}
	_, err := actor.S3Client.PutBucketVersioning(ctx, verInput)
	if err != nil {
		var noBucket *types.NoSuchBucket
		if errors.As(err, &noBucket) {
			log.Printf("Bucket %s does not exist.\n", bucket)
			err = noBucket
		}
		return err
	}

	input := &s3.PutObjectLockConfigurationInput{
		Bucket: aws.String(bucket),
		ObjectLockConfiguration: &types.ObjectLockConfiguration{
			ObjectLockEnabled: types.ObjectLockEnabledEnabled,
		},
	}
	_, err = actor.S3Client.PutObjectLockConfiguration(ctx, input)
	if err != nil {
		var noBucket *types.NoSuchBucket
		if errors.As(err, &noBucket) {
			log.Printf("Bucket %s does not exist.\n", bucket)
			err = noBucket
		}
	}

	return err
}
```
Setel periode retensi default bucket.  

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"log"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// S3Actions wraps S3 service actions.
type S3Actions struct {
	S3Client  *s3.Client
	S3Manager *manager.Uploader
}



// ModifyDefaultBucketRetention modifies the default retention period of an existing bucket.
func (actor S3Actions) ModifyDefaultBucketRetention(
	ctx context.Context, bucket string, lockMode types.ObjectLockEnabled, retentionPeriod int32, retentionMode types.ObjectLockRetentionMode) error {

	input := &s3.PutObjectLockConfigurationInput{
		Bucket: aws.String(bucket),
		ObjectLockConfiguration: &types.ObjectLockConfiguration{
			ObjectLockEnabled: lockMode,
			Rule: &types.ObjectLockRule{
				DefaultRetention: &types.DefaultRetention{
					Days: aws.Int32(retentionPeriod),
					Mode: retentionMode,
				},
			},
		},
	}
	_, err := actor.S3Client.PutObjectLockConfiguration(ctx, input)
	if err != nil {
		var noBucket *types.NoSuchBucket
		if errors.As(err, &noBucket) {
			log.Printf("Bucket %s does not exist.\n", bucket)
			err = noBucket
		}
	}

	return err
}
```
+  Untuk detail API, lihat [PutObjectLockConfiguration](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.PutObjectLockConfiguration)di *Referensi AWS SDK untuk Go API*. 

### `PutObjectRetention`
<a name="s3_PutObjectRetention_go_2_topic"></a>

Contoh kode berikut menunjukkan cara menggunakan`PutObjectRetention`.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/workflows/s3_object_lock#code-examples). 

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"log"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// S3Actions wraps S3 service actions.
type S3Actions struct {
	S3Client  *s3.Client
	S3Manager *manager.Uploader
}



// PutObjectRetention sets the object retention configuration for an S3 object.
func (actor S3Actions) PutObjectRetention(ctx context.Context, bucket string, key string, retentionMode types.ObjectLockRetentionMode, retentionPeriodDays int32) error {
	input := &s3.PutObjectRetentionInput{
		Bucket: aws.String(bucket),
		Key:    aws.String(key),
		Retention: &types.ObjectLockRetention{
			Mode:            retentionMode,
			RetainUntilDate: aws.Time(time.Now().AddDate(0, 0, int(retentionPeriodDays))),
		},
		BypassGovernanceRetention: aws.Bool(true),
	}

	_, err := actor.S3Client.PutObjectRetention(ctx, input)
	if err != nil {
		var noKey *types.NoSuchKey
		if errors.As(err, &noKey) {
			log.Printf("Object %s does not exist in bucket %s.\n", key, bucket)
			err = noKey
		}
	}

	return err
}
```
+  Untuk detail API, lihat [PutObjectRetention](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.PutObjectRetention)di *Referensi AWS SDK untuk Go API*. 

## Skenario
<a name="scenarios"></a>

### Membuat URL yang telah ditetapkan sebelumnya
<a name="s3_Scenario_PresignedUrl_go_2_topic"></a>

Contoh kode berikut menunjukkan cara membuat URL presigned untuk Amazon S3 dan mengunggah objek.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/s3#code-examples). 
Buat fungsi yang membungkus tindakan S3 yang telah ditetapkan sebelumnya.  

```
import (
	"context"
	"log"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	v4 "github.com/aws/aws-sdk-go-v2/aws/signer/v4"
	"github.com/aws/aws-sdk-go-v2/service/s3"
)

// Presigner encapsulates the Amazon Simple Storage Service (Amazon S3) presign actions
// used in the examples.
// It contains PresignClient, a client that is used to presign requests to Amazon S3.
// Presigned requests contain temporary credentials and can be made from any HTTP client.
type Presigner struct {
	PresignClient *s3.PresignClient
}



// GetObject makes a presigned request that can be used to get an object from a bucket.
// The presigned request is valid for the specified number of seconds.
func (presigner Presigner) GetObject(
	ctx context.Context, bucketName string, objectKey string, lifetimeSecs int64) (*v4.PresignedHTTPRequest, error) {
	request, err := presigner.PresignClient.PresignGetObject(ctx, &s3.GetObjectInput{
		Bucket: aws.String(bucketName),
		Key:    aws.String(objectKey),
	}, func(opts *s3.PresignOptions) {
		opts.Expires = time.Duration(lifetimeSecs * int64(time.Second))
	})
	if err != nil {
		log.Printf("Couldn't get a presigned request to get %v:%v. Here's why: %v\n",
			bucketName, objectKey, err)
	}
	return request, err
}



// PutObject makes a presigned request that can be used to put an object in a bucket.
// The presigned request is valid for the specified number of seconds.
func (presigner Presigner) PutObject(
	ctx context.Context, bucketName string, objectKey string, lifetimeSecs int64) (*v4.PresignedHTTPRequest, error) {
	request, err := presigner.PresignClient.PresignPutObject(ctx, &s3.PutObjectInput{
		Bucket: aws.String(bucketName),
		Key:    aws.String(objectKey),
	}, func(opts *s3.PresignOptions) {
		opts.Expires = time.Duration(lifetimeSecs * int64(time.Second))
	})
	if err != nil {
		log.Printf("Couldn't get a presigned request to put %v:%v. Here's why: %v\n",
			bucketName, objectKey, err)
	}
	return request, err
}



// DeleteObject makes a presigned request that can be used to delete an object from a bucket.
func (presigner Presigner) DeleteObject(ctx context.Context, bucketName string, objectKey string) (*v4.PresignedHTTPRequest, error) {
	request, err := presigner.PresignClient.PresignDeleteObject(ctx, &s3.DeleteObjectInput{
		Bucket: aws.String(bucketName),
		Key:    aws.String(objectKey),
	})
	if err != nil {
		log.Printf("Couldn't get a presigned request to delete object %v. Here's why: %v\n", objectKey, err)
	}
	return request, err
}



func (presigner Presigner) PresignPostObject(ctx context.Context, bucketName string, objectKey string, lifetimeSecs int64) (*s3.PresignedPostRequest, error) {
	request, err := presigner.PresignClient.PresignPostObject(ctx, &s3.PutObjectInput{
		Bucket: aws.String(bucketName),
		Key:    aws.String(objectKey),
	}, func(options *s3.PresignPostOptions) {
		options.Expires = time.Duration(lifetimeSecs) * time.Second
	})
	if err != nil {
		log.Printf("Couldn't get a presigned post request to put %v:%v. Here's why: %v\n", bucketName, objectKey, err)
	}
	return request, nil
}
```
Jalankan contoh interaktif yang menghasilkan dan menggunakan presigned URLs untuk mengunggah, mengunduh, dan menghapus objek S3.  

```
import (
	"bytes"
	"context"
	"io"
	"log"
	"mime/multipart"
	"net/http"
	"os"
	"strings"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/awsdocs/aws-doc-sdk-examples/gov2/demotools"
	"github.com/awsdocs/aws-doc-sdk-examples/gov2/s3/actions"
)



// RunPresigningScenario is an interactive example that shows you how to get presigned
// HTTP requests that you can use to move data into and out of Amazon Simple Storage
// Service (Amazon S3). The presigned requests contain temporary credentials and can
// be used by an HTTP client.
//
// 1. Get a presigned request to put an object in a bucket.
// 2. Use the net/http package to use the presigned request to upload a local file to the bucket.
// 3. Get a presigned request to get an object from a bucket.
// 4. Use the net/http package to use the presigned request to download the object to a local file.
// 5. Get a presigned request to delete an object from a bucket.
// 6. Use the net/http package to use the presigned request to delete the object.
//
// This example creates an Amazon S3 presign client from the specified sdkConfig so that
// you can replace it with a mocked or stubbed config for unit testing.
//
// It uses a questioner from the `demotools` package to get input during the example.
// This package can be found in the ..\..\demotools folder of this repo.
//
// It uses an IHttpRequester interface to abstract HTTP requests so they can be mocked
// during testing.
func RunPresigningScenario(ctx context.Context, sdkConfig aws.Config, questioner demotools.IQuestioner, httpRequester IHttpRequester) {
	defer func() {
		if r := recover(); r != nil {
			log.Println("Something went wrong with the demo.")
			_, isMock := questioner.(*demotools.MockQuestioner)
			if isMock || questioner.AskBool("Do you want to see the full error message (y/n)?", "y") {
				log.Println(r)
			}
		}
	}()

	log.Println(strings.Repeat("-", 88))
	log.Println("Welcome to the Amazon S3 presigning demo.")
	log.Println(strings.Repeat("-", 88))

	s3Client := s3.NewFromConfig(sdkConfig)
	bucketBasics := actions.BucketBasics{S3Client: s3Client}
	presignClient := s3.NewPresignClient(s3Client)
	presigner := actions.Presigner{PresignClient: presignClient}

	bucketName := questioner.Ask("We'll need a bucket. Enter a name for a bucket "+
		"you own or one you want to create:", demotools.NotEmpty{})
	bucketExists, err := bucketBasics.BucketExists(ctx, bucketName)
	if err != nil {
		panic(err)
	}
	if !bucketExists {
		err = bucketBasics.CreateBucket(ctx, bucketName, sdkConfig.Region)
		if err != nil {
			panic(err)
		} else {
			log.Println("Bucket created.")
		}
	}
	log.Println(strings.Repeat("-", 88))

	log.Printf("Let's presign a request to upload a file to your bucket.")
	uploadFilename := questioner.Ask("Enter the path to a file you want to upload:",
		demotools.NotEmpty{})
	uploadKey := questioner.Ask("What would you like to name the uploaded object?",
		demotools.NotEmpty{})
	uploadFile, err := os.Open(uploadFilename)
	if err != nil {
		panic(err)
	}
	defer uploadFile.Close()
	presignedPutRequest, err := presigner.PutObject(ctx, bucketName, uploadKey, 60)
	if err != nil {
		panic(err)
	}
	log.Printf("Got a presigned %v request to URL:\n\t%v\n", presignedPutRequest.Method,
		presignedPutRequest.URL)
	log.Println("Using net/http to send the request...")
	info, err := uploadFile.Stat()
	if err != nil {
		panic(err)
	}
	putResponse, err := httpRequester.Put(presignedPutRequest.URL, info.Size(), uploadFile)
	if err != nil {
		panic(err)
	}
	log.Printf("%v object %v with presigned URL returned %v.", presignedPutRequest.Method,
		uploadKey, putResponse.StatusCode)
	log.Println(strings.Repeat("-", 88))

	log.Printf("Let's presign a request to download the object.")
	questioner.Ask("Press Enter when you're ready.")
	presignedGetRequest, err := presigner.GetObject(ctx, bucketName, uploadKey, 60)
	if err != nil {
		panic(err)
	}
	log.Printf("Got a presigned %v request to URL:\n\t%v\n", presignedGetRequest.Method,
		presignedGetRequest.URL)
	log.Println("Using net/http to send the request...")
	getResponse, err := httpRequester.Get(presignedGetRequest.URL)
	if err != nil {
		panic(err)
	}
	log.Printf("%v object %v with presigned URL returned %v.", presignedGetRequest.Method,
		uploadKey, getResponse.StatusCode)
	defer getResponse.Body.Close()
	downloadBody, err := io.ReadAll(getResponse.Body)
	if err != nil {
		panic(err)
	}
	log.Printf("Downloaded %v bytes. Here are the first 100 of them:\n", len(downloadBody))
	log.Println(strings.Repeat("-", 88))
	log.Println(string(downloadBody[:100]))
	log.Println(strings.Repeat("-", 88))

	log.Println("Now we'll create a new request to put the same object using a presigned post request")
	questioner.Ask("Press Enter when you're ready.")
	presignPostRequest, err := presigner.PresignPostObject(ctx, bucketName, uploadKey, 60)
	if err != nil {
		panic(err)
	}
	log.Printf("Got a presigned post request to url %v with values %v\n", presignPostRequest.URL, presignPostRequest.Values)
	log.Println("Using net/http multipart to send the request...")
	uploadFile, err = os.Open(uploadFilename)
	if err != nil {
		panic(err)
	}
	defer uploadFile.Close()
	multiPartResponse, err := sendMultipartRequest(presignPostRequest.URL, presignPostRequest.Values, uploadFile, uploadKey, httpRequester)
	if err != nil {
		panic(err)
	}
	log.Printf("Presign post object %v with presigned URL returned %v.", uploadKey, multiPartResponse.StatusCode)

	log.Println("Let's presign a request to delete the object.")
	questioner.Ask("Press Enter when you're ready.")
	presignedDelRequest, err := presigner.DeleteObject(ctx, bucketName, uploadKey)
	if err != nil {
		panic(err)
	}
	log.Printf("Got a presigned %v request to URL:\n\t%v\n", presignedDelRequest.Method,
		presignedDelRequest.URL)
	log.Println("Using net/http to send the request...")
	delResponse, err := httpRequester.Delete(presignedDelRequest.URL)
	if err != nil {
		panic(err)
	}
	log.Printf("%v object %v with presigned URL returned %v.\n", presignedDelRequest.Method,
		uploadKey, delResponse.StatusCode)
	log.Println(strings.Repeat("-", 88))

	log.Println("Thanks for watching!")
	log.Println(strings.Repeat("-", 88))
}
```
Tentukan pembungkus permintaan HTTP yang digunakan oleh contoh untuk membuat permintaan HTTP.  

```
// IHttpRequester abstracts HTTP requests into an interface so it can be mocked during
// unit testing.
type IHttpRequester interface {
	Get(url string) (resp *http.Response, err error)
	Post(url, contentType string, body io.Reader) (resp *http.Response, err error)
	Put(url string, contentLength int64, body io.Reader) (resp *http.Response, err error)
	Delete(url string) (resp *http.Response, err error)
}

// HttpRequester uses the net/http package to make HTTP requests during the scenario.
type HttpRequester struct{}

func (httpReq HttpRequester) Get(url string) (resp *http.Response, err error) {
	return http.Get(url)
}
func (httpReq HttpRequester) Post(url, contentType string, body io.Reader) (resp *http.Response, err error) {
	postRequest, err := http.NewRequest("POST", url, body)
	if err != nil {
		return nil, err
	}
	postRequest.Header.Set("Content-Type", contentType)
	return http.DefaultClient.Do(postRequest)
}

func (httpReq HttpRequester) Put(url string, contentLength int64, body io.Reader) (resp *http.Response, err error) {
	putRequest, err := http.NewRequest("PUT", url, body)
	if err != nil {
		return nil, err
	}
	putRequest.ContentLength = contentLength
	return http.DefaultClient.Do(putRequest)
}
func (httpReq HttpRequester) Delete(url string) (resp *http.Response, err error) {
	delRequest, err := http.NewRequest("DELETE", url, nil)
	if err != nil {
		return nil, err
	}
	return http.DefaultClient.Do(delRequest)
}
```

### Kunci objek Amazon S3
<a name="s3_Scenario_ObjectLock_go_2_topic"></a>

Contoh kode berikut menunjukkan cara bekerja dengan fitur kunci objek S3.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/workflows/s3_object_lock#code-examples). 
Jalankan skenario interaktif yang mendemonstrasikan fitur kunci objek Amazon S3.  

```
import (
	"context"
	"fmt"
	"log"
	"strings"

	"s3_object_lock/actions"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/awsdocs/aws-doc-sdk-examples/gov2/demotools"
)

// ObjectLockScenario contains the steps to run the S3 Object Lock workflow.
type ObjectLockScenario struct {
	questioner demotools.IQuestioner
	resources  Resources
	s3Actions  *actions.S3Actions
	sdkConfig  aws.Config
}

// NewObjectLockScenario constructs a new ObjectLockScenario instance.
func NewObjectLockScenario(sdkConfig aws.Config, questioner demotools.IQuestioner) ObjectLockScenario {
	scenario := ObjectLockScenario{
		questioner: questioner,
		resources:  Resources{},
		s3Actions:  &actions.S3Actions{S3Client: s3.NewFromConfig(sdkConfig)},
		sdkConfig:  sdkConfig,
	}
	scenario.s3Actions.S3Manager = manager.NewUploader(scenario.s3Actions.S3Client)
	scenario.resources.init(scenario.s3Actions, questioner)
	return scenario
}

type nameLocked struct {
	name   string
	locked bool
}

var createInfo = []nameLocked{
	{"standard-bucket", false},
	{"lock-bucket", true},
	{"retention-bucket", false},
}

// CreateBuckets creates the S3 buckets required for the workflow.
func (scenario *ObjectLockScenario) CreateBuckets(ctx context.Context) {
	log.Println("Let's create some S3 buckets to use for this workflow.")
	success := false
	for !success {
		prefix := scenario.questioner.Ask(
			"This example creates three buckets. Enter a prefix to name your buckets (remember bucket names must be globally unique):")

		for _, info := range createInfo {
			log.Println(fmt.Sprintf("%s.%s", prefix, info.name))
			bucketName, err := scenario.s3Actions.CreateBucketWithLock(ctx, fmt.Sprintf("%s.%s", prefix, info.name), scenario.sdkConfig.Region, info.locked)
			if err != nil {
				switch err.(type) {
				case *types.BucketAlreadyExists, *types.BucketAlreadyOwnedByYou:
					log.Printf("Couldn't create bucket %s.\n", bucketName)
				default:
					panic(err)
				}
				break
			}
			scenario.resources.demoBuckets[info.name] = &DemoBucket{
				name:       bucketName,
				objectKeys: []string{},
			}
			log.Printf("Created bucket %s.\n", bucketName)
		}

		if len(scenario.resources.demoBuckets) < len(createInfo) {
			scenario.resources.deleteBuckets(ctx)
		} else {
			success = true
		}
	}

	log.Println("S3 buckets created.")
	log.Println(strings.Repeat("-", 88))
}

// EnableLockOnBucket enables object locking on an existing bucket.
func (scenario *ObjectLockScenario) EnableLockOnBucket(ctx context.Context) {
	log.Println("\nA bucket can be configured to use object locking.")
	scenario.questioner.Ask("Press Enter to continue.")

	var err error
	bucket := scenario.resources.demoBuckets["retention-bucket"]
	err = scenario.s3Actions.EnableObjectLockOnBucket(ctx, bucket.name)
	if err != nil {
		switch err.(type) {
		case *types.NoSuchBucket:
			log.Printf("Couldn't enable object locking on bucket %s.\n", bucket.name)
		default:
			panic(err)
		}
	} else {
		log.Printf("Object locking enabled on bucket %s.", bucket.name)
	}

	log.Println(strings.Repeat("-", 88))
}

// SetDefaultRetentionPolicy sets a default retention governance policy on a bucket.
func (scenario *ObjectLockScenario) SetDefaultRetentionPolicy(ctx context.Context) {
	log.Println("\nA bucket can be configured to use object locking with a default retention period.")

	bucket := scenario.resources.demoBuckets["retention-bucket"]
	retentionPeriod := scenario.questioner.AskInt("Enter the default retention period in days: ")
	err := scenario.s3Actions.ModifyDefaultBucketRetention(ctx, bucket.name, types.ObjectLockEnabledEnabled, int32(retentionPeriod), types.ObjectLockRetentionModeGovernance)
	if err != nil {
		switch err.(type) {
		case *types.NoSuchBucket:
			log.Printf("Couldn't configure a default retention period on bucket %s.\n", bucket.name)
		default:
			panic(err)
		}
	} else {
		log.Printf("Default retention policy set on bucket %s with %d day retention period.", bucket.name, retentionPeriod)
		bucket.retentionEnabled = true
	}

	log.Println(strings.Repeat("-", 88))
}

// UploadTestObjects uploads test objects to the S3 buckets.
func (scenario *ObjectLockScenario) UploadTestObjects(ctx context.Context) {
	log.Println("Uploading test objects to S3 buckets.")

	for _, info := range createInfo {
		bucket := scenario.resources.demoBuckets[info.name]
		for i := 0; i < 2; i++ {
			key, err := scenario.s3Actions.UploadObject(ctx, bucket.name, fmt.Sprintf("example-%d", i),
				fmt.Sprintf("Example object content #%d in bucket %s.", i, bucket.name))
			if err != nil {
				switch err.(type) {
				case *types.NoSuchBucket:
					log.Printf("Couldn't upload %s to bucket %s.\n", key, bucket.name)
				default:
					panic(err)
				}
			} else {
				log.Printf("Uploaded %s to bucket %s.\n", key, bucket.name)
				bucket.objectKeys = append(bucket.objectKeys, key)
			}
		}
	}

	scenario.questioner.Ask("Test objects uploaded. Press Enter to continue.")
	log.Println(strings.Repeat("-", 88))
}

// SetObjectLockConfigurations sets object lock configurations on the test objects.
func (scenario *ObjectLockScenario) SetObjectLockConfigurations(ctx context.Context) {
	log.Println("Now let's set object lock configurations on individual objects.")

	buckets := []*DemoBucket{scenario.resources.demoBuckets["lock-bucket"], scenario.resources.demoBuckets["retention-bucket"]}
	for _, bucket := range buckets {
		for index, objKey := range bucket.objectKeys {
			switch index {
			case 0:
				if scenario.questioner.AskBool(fmt.Sprintf("\nDo you want to add a legal hold to %s in %s (y/n)? ", objKey, bucket.name), "y") {
					err := scenario.s3Actions.PutObjectLegalHold(ctx, bucket.name, objKey, "", types.ObjectLockLegalHoldStatusOn)
					if err != nil {
						switch err.(type) {
						case *types.NoSuchKey:
							log.Printf("Couldn't set legal hold on %s.\n", objKey)
						default:
							panic(err)
						}
					} else {
						log.Printf("Legal hold set on %s.\n", objKey)
					}
				}
			case 1:
				q := fmt.Sprintf("\nDo you want to add a 1 day Governance retention period to %s in %s?\n"+
					"Reminder: Only a user with the s3:BypassGovernanceRetention permission is able to delete this object\n"+
					"or its bucket until the retention period has expired. (y/n) ", objKey, bucket.name)
				if scenario.questioner.AskBool(q, "y") {
					err := scenario.s3Actions.PutObjectRetention(ctx, bucket.name, objKey, types.ObjectLockRetentionModeGovernance, 1)
					if err != nil {
						switch err.(type) {
						case *types.NoSuchKey:
							log.Printf("Couldn't set retention period on %s in %s.\n", objKey, bucket.name)
						default:
							panic(err)
						}
					} else {
						log.Printf("Retention period set to 1 for %s.", objKey)
						bucket.retentionEnabled = true
					}
				}
			}
		}
	}
	log.Println(strings.Repeat("-", 88))
}

const (
	ListAll = iota
	DeleteObject
	DeleteRetentionObject
	OverwriteObject
	ViewRetention
	ViewLegalHold
	Finish
)

// InteractWithObjects allows the user to interact with the objects and test the object lock configurations.
func (scenario *ObjectLockScenario) InteractWithObjects(ctx context.Context) {
	log.Println("Now you can interact with the objects to explore the object lock configurations.")
	interactiveChoices := []string{
		"List all objects and buckets.",
		"Attempt to delete an object.",
		"Attempt to delete an object with retention period bypass.",
		"Attempt to overwrite a file.",
		"View the retention settings for an object.",
		"View the legal hold settings for an object.",
		"Finish the workflow."}

	choice := ListAll
	for choice != Finish {
		objList := scenario.GetAllObjects(ctx)
		objChoices := scenario.makeObjectChoiceList(objList)
		choice = scenario.questioner.AskChoice("Choose an action from the menu:\n", interactiveChoices)
		switch choice {
		case ListAll:
			log.Println("The current objects in the example buckets are:")
			for _, objChoice := range objChoices {
				log.Println("\t", objChoice)
			}
		case DeleteObject, DeleteRetentionObject:
			objChoice := scenario.questioner.AskChoice("Enter the number of the object to delete:\n", objChoices)
			obj := objList[objChoice]
			deleted, err := scenario.s3Actions.DeleteObject(ctx, obj.bucket, obj.key, obj.versionId, choice == DeleteRetentionObject)
			if err != nil {
				switch err.(type) {
				case *types.NoSuchKey:
					log.Println("Nothing to delete.")
				default:
					panic(err)
				}
			} else if deleted {
				log.Printf("Object %s deleted.\n", obj.key)
			}
		case OverwriteObject:
			objChoice := scenario.questioner.AskChoice("Enter the number of the object to overwrite:\n", objChoices)
			obj := objList[objChoice]
			_, err := scenario.s3Actions.UploadObject(ctx, obj.bucket, obj.key, fmt.Sprintf("New content in object %s.", obj.key))
			if err != nil {
				switch err.(type) {
				case *types.NoSuchBucket:
					log.Println("Couldn't upload to nonexistent bucket.")
				default:
					panic(err)
				}
			} else {
				log.Printf("Uploaded new content to object %s.\n", obj.key)
			}
		case ViewRetention:
			objChoice := scenario.questioner.AskChoice("Enter the number of the object to view:\n", objChoices)
			obj := objList[objChoice]
			retention, err := scenario.s3Actions.GetObjectRetention(ctx, obj.bucket, obj.key)
			if err != nil {
				switch err.(type) {
				case *types.NoSuchKey:
					log.Printf("Can't get retention configuration for %s.\n", obj.key)
				default:
					panic(err)
				}
			} else if retention != nil {
				log.Printf("Object %s has retention mode %s until %v.\n", obj.key, retention.Mode, retention.RetainUntilDate)
			} else {
				log.Printf("Object %s does not have object retention configured.\n", obj.key)
			}
		case ViewLegalHold:
			objChoice := scenario.questioner.AskChoice("Enter the number of the object to view:\n", objChoices)
			obj := objList[objChoice]
			legalHold, err := scenario.s3Actions.GetObjectLegalHold(ctx, obj.bucket, obj.key, obj.versionId)
			if err != nil {
				switch err.(type) {
				case *types.NoSuchKey:
					log.Printf("Can't get legal hold configuration for %s.\n", obj.key)
				default:
					panic(err)
				}
			} else if legalHold != nil {
				log.Printf("Object %s has legal hold %v.", obj.key, *legalHold)
			} else {
				log.Printf("Object %s does not have legal hold configured.", obj.key)
			}
		case Finish:
			log.Println("Let's clean up.")
		}
		log.Println(strings.Repeat("-", 88))
	}
}

type BucketKeyVersionId struct {
	bucket    string
	key       string
	versionId string
}

// GetAllObjects gets the object versions in the example S3 buckets and returns them in a flattened list.
func (scenario *ObjectLockScenario) GetAllObjects(ctx context.Context) []BucketKeyVersionId {
	var objectList []BucketKeyVersionId
	for _, info := range createInfo {
		bucket := scenario.resources.demoBuckets[info.name]
		versions, err := scenario.s3Actions.ListObjectVersions(ctx, bucket.name)
		if err != nil {
			switch err.(type) {
			case *types.NoSuchBucket:
				log.Printf("Couldn't get object versions for %s.\n", bucket.name)
			default:
				panic(err)
			}
		} else {
			for _, version := range versions {
				objectList = append(objectList,
					BucketKeyVersionId{bucket: bucket.name, key: *version.Key, versionId: *version.VersionId})
			}
		}
	}
	return objectList
}

// makeObjectChoiceList makes the object version list into a list of strings that are displayed
// as choices.
func (scenario *ObjectLockScenario) makeObjectChoiceList(bucketObjects []BucketKeyVersionId) []string {
	choices := make([]string, len(bucketObjects))
	for i := 0; i < len(bucketObjects); i++ {
		choices[i] = fmt.Sprintf("%s in %s with VersionId %s.",
			bucketObjects[i].key, bucketObjects[i].bucket, bucketObjects[i].versionId)
	}
	return choices
}

// Run runs the S3 Object Lock scenario.
func (scenario *ObjectLockScenario) Run(ctx context.Context) {
	defer func() {
		if r := recover(); r != nil {
			log.Println("Something went wrong with the demo.")
			_, isMock := scenario.questioner.(*demotools.MockQuestioner)
			if isMock || scenario.questioner.AskBool("Do you want to see the full error message (y/n)?", "y") {
				log.Println(r)
			}
			scenario.resources.Cleanup(ctx)
		}
	}()

	log.Println(strings.Repeat("-", 88))
	log.Println("Welcome to the Amazon S3 Object Lock Feature Scenario.")
	log.Println(strings.Repeat("-", 88))

	scenario.CreateBuckets(ctx)
	scenario.EnableLockOnBucket(ctx)
	scenario.SetDefaultRetentionPolicy(ctx)
	scenario.UploadTestObjects(ctx)
	scenario.SetObjectLockConfigurations(ctx)
	scenario.InteractWithObjects(ctx)

	scenario.resources.Cleanup(ctx)

	log.Println(strings.Repeat("-", 88))
	log.Println("Thanks for watching!")
	log.Println(strings.Repeat("-", 88))
}
```
Tentukan struct yang membungkus tindakan S3 yang digunakan dalam contoh ini.  

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"log"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// S3Actions wraps S3 service actions.
type S3Actions struct {
	S3Client  *s3.Client
	S3Manager *manager.Uploader
}



// CreateBucketWithLock creates a new S3 bucket with optional object locking enabled
// and waits for the bucket to exist before returning.
func (actor S3Actions) CreateBucketWithLock(ctx context.Context, bucket string, region string, enableObjectLock bool) (string, error) {
	input := &s3.CreateBucketInput{
		Bucket: aws.String(bucket),
		CreateBucketConfiguration: &types.CreateBucketConfiguration{
			LocationConstraint: types.BucketLocationConstraint(region),
		},
	}

	if enableObjectLock {
		input.ObjectLockEnabledForBucket = aws.Bool(true)
	}

	_, err := actor.S3Client.CreateBucket(ctx, input)
	if err != nil {
		var owned *types.BucketAlreadyOwnedByYou
		var exists *types.BucketAlreadyExists
		if errors.As(err, &owned) {
			log.Printf("You already own bucket %s.\n", bucket)
			err = owned
		} else if errors.As(err, &exists) {
			log.Printf("Bucket %s already exists.\n", bucket)
			err = exists
		}
	} else {
		err = s3.NewBucketExistsWaiter(actor.S3Client).Wait(
			ctx, &s3.HeadBucketInput{Bucket: aws.String(bucket)}, time.Minute)
		if err != nil {
			log.Printf("Failed attempt to wait for bucket %s to exist.\n", bucket)
		}
	}

	return bucket, err
}



// GetObjectLegalHold retrieves the legal hold status for an S3 object.
func (actor S3Actions) GetObjectLegalHold(ctx context.Context, bucket string, key string, versionId string) (*types.ObjectLockLegalHoldStatus, error) {
	var status *types.ObjectLockLegalHoldStatus
	input := &s3.GetObjectLegalHoldInput{
		Bucket:    aws.String(bucket),
		Key:       aws.String(key),
		VersionId: aws.String(versionId),
	}

	output, err := actor.S3Client.GetObjectLegalHold(ctx, input)
	if err != nil {
		var noSuchKeyErr *types.NoSuchKey
		var apiErr *smithy.GenericAPIError
		if errors.As(err, &noSuchKeyErr) {
			log.Printf("Object %s does not exist in bucket %s.\n", key, bucket)
			err = noSuchKeyErr
		} else if errors.As(err, &apiErr) {
			switch apiErr.ErrorCode() {
			case "NoSuchObjectLockConfiguration":
				log.Printf("Object %s does not have an object lock configuration.\n", key)
				err = nil
			case "InvalidRequest":
				log.Printf("Bucket %s does not have an object lock configuration.\n", bucket)
				err = nil
			}
		}
	} else {
		status = &output.LegalHold.Status
	}

	return status, err
}



// GetObjectLockConfiguration retrieves the object lock configuration for an S3 bucket.
func (actor S3Actions) GetObjectLockConfiguration(ctx context.Context, bucket string) (*types.ObjectLockConfiguration, error) {
	var lockConfig *types.ObjectLockConfiguration
	input := &s3.GetObjectLockConfigurationInput{
		Bucket: aws.String(bucket),
	}

	output, err := actor.S3Client.GetObjectLockConfiguration(ctx, input)
	if err != nil {
		var noBucket *types.NoSuchBucket
		var apiErr *smithy.GenericAPIError
		if errors.As(err, &noBucket) {
			log.Printf("Bucket %s does not exist.\n", bucket)
			err = noBucket
		} else if errors.As(err, &apiErr) && apiErr.ErrorCode() == "ObjectLockConfigurationNotFoundError" {
			log.Printf("Bucket %s does not have an object lock configuration.\n", bucket)
			err = nil
		}
	} else {
		lockConfig = output.ObjectLockConfiguration
	}

	return lockConfig, err
}



// GetObjectRetention retrieves the object retention configuration for an S3 object.
func (actor S3Actions) GetObjectRetention(ctx context.Context, bucket string, key string) (*types.ObjectLockRetention, error) {
	var retention *types.ObjectLockRetention
	input := &s3.GetObjectRetentionInput{
		Bucket: aws.String(bucket),
		Key:    aws.String(key),
	}

	output, err := actor.S3Client.GetObjectRetention(ctx, input)
	if err != nil {
		var noKey *types.NoSuchKey
		var apiErr *smithy.GenericAPIError
		if errors.As(err, &noKey) {
			log.Printf("Object %s does not exist in bucket %s.\n", key, bucket)
			err = noKey
		} else if errors.As(err, &apiErr) {
			switch apiErr.ErrorCode() {
			case "NoSuchObjectLockConfiguration":
				err = nil
			case "InvalidRequest":
				log.Printf("Bucket %s does not have locking enabled.", bucket)
				err = nil
			}
		}
	} else {
		retention = output.Retention
	}

	return retention, err
}



// PutObjectLegalHold sets the legal hold configuration for an S3 object.
func (actor S3Actions) PutObjectLegalHold(ctx context.Context, bucket string, key string, versionId string, legalHoldStatus types.ObjectLockLegalHoldStatus) error {
	input := &s3.PutObjectLegalHoldInput{
		Bucket: aws.String(bucket),
		Key:    aws.String(key),
		LegalHold: &types.ObjectLockLegalHold{
			Status: legalHoldStatus,
		},
	}
	if versionId != "" {
		input.VersionId = aws.String(versionId)
	}

	_, err := actor.S3Client.PutObjectLegalHold(ctx, input)
	if err != nil {
		var noKey *types.NoSuchKey
		if errors.As(err, &noKey) {
			log.Printf("Object %s does not exist in bucket %s.\n", key, bucket)
			err = noKey
		}
	}

	return err
}



// ModifyDefaultBucketRetention modifies the default retention period of an existing bucket.
func (actor S3Actions) ModifyDefaultBucketRetention(
	ctx context.Context, bucket string, lockMode types.ObjectLockEnabled, retentionPeriod int32, retentionMode types.ObjectLockRetentionMode) error {

	input := &s3.PutObjectLockConfigurationInput{
		Bucket: aws.String(bucket),
		ObjectLockConfiguration: &types.ObjectLockConfiguration{
			ObjectLockEnabled: lockMode,
			Rule: &types.ObjectLockRule{
				DefaultRetention: &types.DefaultRetention{
					Days: aws.Int32(retentionPeriod),
					Mode: retentionMode,
				},
			},
		},
	}
	_, err := actor.S3Client.PutObjectLockConfiguration(ctx, input)
	if err != nil {
		var noBucket *types.NoSuchBucket
		if errors.As(err, &noBucket) {
			log.Printf("Bucket %s does not exist.\n", bucket)
			err = noBucket
		}
	}

	return err
}



// EnableObjectLockOnBucket enables object locking on an existing bucket.
func (actor S3Actions) EnableObjectLockOnBucket(ctx context.Context, bucket string) error {
	// Versioning must be enabled on the bucket before object locking is enabled.
	verInput := &s3.PutBucketVersioningInput{
		Bucket: aws.String(bucket),
		VersioningConfiguration: &types.VersioningConfiguration{
			MFADelete: types.MFADeleteDisabled,
			Status:    types.BucketVersioningStatusEnabled,
		},
	}
	_, err := actor.S3Client.PutBucketVersioning(ctx, verInput)
	if err != nil {
		var noBucket *types.NoSuchBucket
		if errors.As(err, &noBucket) {
			log.Printf("Bucket %s does not exist.\n", bucket)
			err = noBucket
		}
		return err
	}

	input := &s3.PutObjectLockConfigurationInput{
		Bucket: aws.String(bucket),
		ObjectLockConfiguration: &types.ObjectLockConfiguration{
			ObjectLockEnabled: types.ObjectLockEnabledEnabled,
		},
	}
	_, err = actor.S3Client.PutObjectLockConfiguration(ctx, input)
	if err != nil {
		var noBucket *types.NoSuchBucket
		if errors.As(err, &noBucket) {
			log.Printf("Bucket %s does not exist.\n", bucket)
			err = noBucket
		}
	}

	return err
}



// PutObjectRetention sets the object retention configuration for an S3 object.
func (actor S3Actions) PutObjectRetention(ctx context.Context, bucket string, key string, retentionMode types.ObjectLockRetentionMode, retentionPeriodDays int32) error {
	input := &s3.PutObjectRetentionInput{
		Bucket: aws.String(bucket),
		Key:    aws.String(key),
		Retention: &types.ObjectLockRetention{
			Mode:            retentionMode,
			RetainUntilDate: aws.Time(time.Now().AddDate(0, 0, int(retentionPeriodDays))),
		},
		BypassGovernanceRetention: aws.Bool(true),
	}

	_, err := actor.S3Client.PutObjectRetention(ctx, input)
	if err != nil {
		var noKey *types.NoSuchKey
		if errors.As(err, &noKey) {
			log.Printf("Object %s does not exist in bucket %s.\n", key, bucket)
			err = noKey
		}
	}

	return err
}



// UploadObject uses the S3 upload manager to upload an object to a bucket.
func (actor S3Actions) UploadObject(ctx context.Context, bucket string, key string, contents string) (string, error) {
	var outKey string
	input := &s3.PutObjectInput{
		Bucket:            aws.String(bucket),
		Key:               aws.String(key),
		Body:              bytes.NewReader([]byte(contents)),
		ChecksumAlgorithm: types.ChecksumAlgorithmSha256,
	}
	output, err := actor.S3Manager.Upload(ctx, input)
	if err != nil {
		var noBucket *types.NoSuchBucket
		if errors.As(err, &noBucket) {
			log.Printf("Bucket %s does not exist.\n", bucket)
			err = noBucket
		}
	} else {
		err := s3.NewObjectExistsWaiter(actor.S3Client).Wait(ctx, &s3.HeadObjectInput{
			Bucket: aws.String(bucket),
			Key:    aws.String(key),
		}, time.Minute)
		if err != nil {
			log.Printf("Failed attempt to wait for object %s to exist in %s.\n", key, bucket)
		} else {
			outKey = *output.Key
		}
	}
	return outKey, err
}



// ListObjectVersions lists all versions of all objects in a bucket.
func (actor S3Actions) ListObjectVersions(ctx context.Context, bucket string) ([]types.ObjectVersion, error) {
	var err error
	var output *s3.ListObjectVersionsOutput
	var versions []types.ObjectVersion
	input := &s3.ListObjectVersionsInput{Bucket: aws.String(bucket)}
	versionPaginator := s3.NewListObjectVersionsPaginator(actor.S3Client, input)
	for versionPaginator.HasMorePages() {
		output, err = versionPaginator.NextPage(ctx)
		if err != nil {
			var noBucket *types.NoSuchBucket
			if errors.As(err, &noBucket) {
				log.Printf("Bucket %s does not exist.\n", bucket)
				err = noBucket
			}
			break
		} else {
			versions = append(versions, output.Versions...)
		}
	}
	return versions, err
}



// DeleteObject deletes an object from a bucket.
func (actor S3Actions) DeleteObject(ctx context.Context, bucket string, key string, versionId string, bypassGovernance bool) (bool, error) {
	deleted := false
	input := &s3.DeleteObjectInput{
		Bucket: aws.String(bucket),
		Key:    aws.String(key),
	}
	if versionId != "" {
		input.VersionId = aws.String(versionId)
	}
	if bypassGovernance {
		input.BypassGovernanceRetention = aws.Bool(true)
	}
	_, err := actor.S3Client.DeleteObject(ctx, input)
	if err != nil {
		var noKey *types.NoSuchKey
		var apiErr *smithy.GenericAPIError
		if errors.As(err, &noKey) {
			log.Printf("Object %s does not exist in %s.\n", key, bucket)
			err = noKey
		} else if errors.As(err, &apiErr) {
			switch apiErr.ErrorCode() {
			case "AccessDenied":
				log.Printf("Access denied: cannot delete object %s from %s.\n", key, bucket)
				err = nil
			case "InvalidArgument":
				if bypassGovernance {
					log.Printf("You cannot specify bypass governance on a bucket without lock enabled.")
					err = nil
				}
			}
		}
	} else {
		err = s3.NewObjectNotExistsWaiter(actor.S3Client).Wait(
			ctx, &s3.HeadObjectInput{Bucket: aws.String(bucket), Key: aws.String(key)}, time.Minute)
		if err != nil {
			log.Printf("Failed attempt to wait for object %s in bucket %s to be deleted.\n", key, bucket)
		} else {
			deleted = true
		}
	}
	return deleted, err
}



// DeleteObjects deletes a list of objects from a bucket.
func (actor S3Actions) DeleteObjects(ctx context.Context, bucket string, objects []types.ObjectIdentifier, bypassGovernance bool) error {
	if len(objects) == 0 {
		return nil
	}

	input := s3.DeleteObjectsInput{
		Bucket: aws.String(bucket),
		Delete: &types.Delete{
			Objects: objects,
			Quiet:   aws.Bool(true),
		},
	}
	if bypassGovernance {
		input.BypassGovernanceRetention = aws.Bool(true)
	}
	delOut, err := actor.S3Client.DeleteObjects(ctx, &input)
	if err != nil || len(delOut.Errors) > 0 {
		log.Printf("Error deleting objects from bucket %s.\n", bucket)
		if err != nil {
			var noBucket *types.NoSuchBucket
			if errors.As(err, &noBucket) {
				log.Printf("Bucket %s does not exist.\n", bucket)
				err = noBucket
			}
		} else if len(delOut.Errors) > 0 {
			for _, outErr := range delOut.Errors {
				log.Printf("%s: %s\n", *outErr.Key, *outErr.Message)
			}
			err = fmt.Errorf("%s", *delOut.Errors[0].Message)
		}
	} else {
		for _, delObjs := range delOut.Deleted {
			err = s3.NewObjectNotExistsWaiter(actor.S3Client).Wait(
				ctx, &s3.HeadObjectInput{Bucket: aws.String(bucket), Key: delObjs.Key}, time.Minute)
			if err != nil {
				log.Printf("Failed attempt to wait for object %s to be deleted.\n", *delObjs.Key)
			} else {
				log.Printf("Deleted %s.\n", *delObjs.Key)
			}
		}
	}
	return err
}
```
Pembersihan sumber daya   

```
import (
	"context"
	"log"
	"s3_object_lock/actions"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/awsdocs/aws-doc-sdk-examples/gov2/demotools"
)

// DemoBucket contains metadata for buckets used in this example.
type DemoBucket struct {
	name             string
	retentionEnabled bool
	objectKeys       []string
}

// Resources keeps track of AWS resources created during the ObjectLockScenario and handles
// cleanup when the scenario finishes.
type Resources struct {
	demoBuckets map[string]*DemoBucket

	s3Actions  *actions.S3Actions
	questioner demotools.IQuestioner
}

// init initializes objects in the Resources struct.
func (resources *Resources) init(s3Actions *actions.S3Actions, questioner demotools.IQuestioner) {
	resources.s3Actions = s3Actions
	resources.questioner = questioner
	resources.demoBuckets = map[string]*DemoBucket{}
}

// Cleanup deletes all AWS resources created during the ObjectLockScenario.
func (resources *Resources) Cleanup(ctx context.Context) {
	defer func() {
		if r := recover(); r != nil {
			log.Printf("Something went wrong during cleanup.\n%v\n", r)
			log.Println("Use the AWS Management Console to remove any remaining resources " +
				"that were created for this scenario.")
		}
	}()

	wantDelete := resources.questioner.AskBool("Do you want to remove all of the AWS resources that were created "+
		"during this demo (y/n)?", "y")
	if !wantDelete {
		log.Println("Be sure to remove resources when you're done with them to avoid unexpected charges!")
		return
	}

	log.Println("Removing objects from S3 buckets and deleting buckets...")
	resources.deleteBuckets(ctx)
	//resources.deleteRetentionObjects(resources.retentionBucket, resources.retentionObjects)

	log.Println("Cleanup complete.")
}

// deleteBuckets empties and then deletes all buckets created during the ObjectLockScenario.
func (resources *Resources) deleteBuckets(ctx context.Context) {
	for _, info := range createInfo {
		bucket := resources.demoBuckets[info.name]
		resources.deleteObjects(ctx, bucket)
		_, err := resources.s3Actions.S3Client.DeleteBucket(ctx, &s3.DeleteBucketInput{
			Bucket: aws.String(bucket.name),
		})
		if err != nil {
			panic(err)
		}
	}
	for _, info := range createInfo {
		bucket := resources.demoBuckets[info.name]
		err := s3.NewBucketNotExistsWaiter(resources.s3Actions.S3Client).Wait(
			ctx, &s3.HeadBucketInput{Bucket: aws.String(bucket.name)}, time.Minute)
		if err != nil {
			log.Printf("Failed attempt to wait for bucket %s to be deleted.\n", bucket.name)
		} else {
			log.Printf("Deleted %s.\n", bucket.name)
		}
	}
	resources.demoBuckets = map[string]*DemoBucket{}
}

// deleteObjects deletes all objects in the specified bucket.
func (resources *Resources) deleteObjects(ctx context.Context, bucket *DemoBucket) {
	lockConfig, err := resources.s3Actions.GetObjectLockConfiguration(ctx, bucket.name)
	if err != nil {
		panic(err)
	}
	versions, err := resources.s3Actions.ListObjectVersions(ctx, bucket.name)
	if err != nil {
		switch err.(type) {
		case *types.NoSuchBucket:
			log.Printf("No objects to get from %s.\n", bucket.name)
		default:
			panic(err)
		}
	}
	delObjects := make([]types.ObjectIdentifier, len(versions))
	for i, version := range versions {
		if lockConfig != nil && lockConfig.ObjectLockEnabled == types.ObjectLockEnabledEnabled {
			status, err := resources.s3Actions.GetObjectLegalHold(ctx, bucket.name, *version.Key, *version.VersionId)
			if err != nil {
				switch err.(type) {
				case *types.NoSuchKey:
					log.Printf("Couldn't determine legal hold status for %s in %s.\n", *version.Key, bucket.name)
				default:
					panic(err)
				}
			} else if status != nil && *status == types.ObjectLockLegalHoldStatusOn {
				err = resources.s3Actions.PutObjectLegalHold(ctx, bucket.name, *version.Key, *version.VersionId, types.ObjectLockLegalHoldStatusOff)
				if err != nil {
					switch err.(type) {
					case *types.NoSuchKey:
						log.Printf("Couldn't turn off legal hold for %s in %s.\n", *version.Key, bucket.name)
					default:
						panic(err)
					}
				}
			}
		}
		delObjects[i] = types.ObjectIdentifier{Key: version.Key, VersionId: version.VersionId}
	}
	err = resources.s3Actions.DeleteObjects(ctx, bucket.name, delObjects, bucket.retentionEnabled)
	if err != nil {
		switch err.(type) {
		case *types.NoSuchBucket:
			log.Println("Nothing to delete.")
		default:
			panic(err)
		}
	}
}
```
+ Untuk detail API, lihat topik berikut di *Referensi API AWS SDK untuk Go *.
  + [GetObjectLegalHold](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.GetObjectLegalHold)
  + [GetObjectLockConfiguration](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.GetObjectLockConfiguration)
  + [GetObjectRetention](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.GetObjectRetention)
  + [PutObjectLegalHold](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.PutObjectLegalHold)
  + [PutObjectLockConfiguration](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.PutObjectLockConfiguration)
  + [PutObjectRetention](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/s3#Client.PutObjectRetention)

### Mengunggah atau mengunduh file besar
<a name="s3_Scenario_UsingLargeFiles_go_2_topic"></a>

Contoh kode berikut menunjukkan cara mengunggah atau mengunduh file besar ke dan dari Amazon S3.

Untuk informasi selengkapnya, lihat [Pengunggahan objek menggunakan unggahan multibagian](https://docs.aws.amazon.com/AmazonS3/latest/userguide/mpu-upload-object.html).

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di [Repositori Contoh Kode AWS](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/s3#code-examples). 
Buat fungsi yang menggunakan pengelola unggah dan unduhan untuk memecah data menjadi beberapa bagian dan mentransfernya secara bersamaan.  

```
import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"io"
	"log"
	"os"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/aws/aws-sdk-go-v2/service/s3/types"
	"github.com/aws/smithy-go"
)

// BucketBasics encapsulates the Amazon Simple Storage Service (Amazon S3) actions
// used in the examples.
// It contains S3Client, an Amazon S3 service client that is used to perform bucket
// and object actions.
type BucketBasics struct {
	S3Client *s3.Client
}



// UploadLargeObject uses an upload manager to upload data to an object in a bucket.
// The upload manager breaks large data into parts and uploads the parts concurrently.
func (basics BucketBasics) UploadLargeObject(ctx context.Context, bucketName string, objectKey string, largeObject []byte) error {
	largeBuffer := bytes.NewReader(largeObject)
	var partMiBs int64 = 10
	uploader := manager.NewUploader(basics.S3Client, func(u *manager.Uploader) {
		u.PartSize = partMiBs * 1024 * 1024
	})
	_, err := uploader.Upload(ctx, &s3.PutObjectInput{
		Bucket: aws.String(bucketName),
		Key:    aws.String(objectKey),
		Body:   largeBuffer,
	})
	if err != nil {
		var apiErr smithy.APIError
		if errors.As(err, &apiErr) && apiErr.ErrorCode() == "EntityTooLarge" {
			log.Printf("Error while uploading object to %s. The object is too large.\n"+
				"The maximum size for a multipart upload is 5TB.", bucketName)
		} else {
			log.Printf("Couldn't upload large object to %v:%v. Here's why: %v\n",
				bucketName, objectKey, err)
		}
	} else {
		err = s3.NewObjectExistsWaiter(basics.S3Client).Wait(
			ctx, &s3.HeadObjectInput{Bucket: aws.String(bucketName), Key: aws.String(objectKey)}, time.Minute)
		if err != nil {
			log.Printf("Failed attempt to wait for object %s to exist.\n", objectKey)
		}
	}

	return err
}



// DownloadLargeObject uses a download manager to download an object from a bucket.
// The download manager gets the data in parts and writes them to a buffer until all of
// the data has been downloaded.
func (basics BucketBasics) DownloadLargeObject(ctx context.Context, bucketName string, objectKey string) ([]byte, error) {
	var partMiBs int64 = 10
	downloader := manager.NewDownloader(basics.S3Client, func(d *manager.Downloader) {
		d.PartSize = partMiBs * 1024 * 1024
	})
	buffer := manager.NewWriteAtBuffer([]byte{})
	_, err := downloader.Download(ctx, buffer, &s3.GetObjectInput{
		Bucket: aws.String(bucketName),
		Key:    aws.String(objectKey),
	})
	if err != nil {
		log.Printf("Couldn't download large object from %v:%v. Here's why: %v\n",
			bucketName, objectKey, err)
	}
	return buffer.Bytes(), err
}
```
Jalankan skenario interaktif yang menunjukkan cara menggunakan pengelola unggahan dan unduhan dalam konteks.  

```
import (
	"context"
	"crypto/rand"
	"log"
	"strings"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/service/s3"
	"github.com/awsdocs/aws-doc-sdk-examples/gov2/demotools"
	"github.com/awsdocs/aws-doc-sdk-examples/gov2/s3/actions"
)

// RunLargeObjectScenario is an interactive example that shows you how to use Amazon
// Simple Storage Service (Amazon S3) to upload and download large objects.
//
// 1. Create a bucket.
// 3. Upload a large object to the bucket by using an upload manager.
// 5. Download a large object by using a download manager.
// 8. Delete all objects in the bucket.
// 9. Delete the bucket.
//
// This example creates an Amazon S3 service client from the specified sdkConfig so that
// you can replace it with a mocked or stubbed config for unit testing.
//
// It uses a questioner from the `demotools` package to get input during the example.
// This package can be found in the ..\..\demotools folder of this repo.
func RunLargeObjectScenario(ctx context.Context, sdkConfig aws.Config, questioner demotools.IQuestioner) {
	defer func() {
		if r := recover(); r != nil {
			log.Println("Something went wrong with the demo.")
			_, isMock := questioner.(*demotools.MockQuestioner)
			if isMock || questioner.AskBool("Do you want to see the full error message (y/n)?", "y") {
				log.Println(r)
			}
		}
	}()

	log.Println(strings.Repeat("-", 88))
	log.Println("Welcome to the Amazon S3 large object demo.")
	log.Println(strings.Repeat("-", 88))

	s3Client := s3.NewFromConfig(sdkConfig)
	bucketBasics := actions.BucketBasics{S3Client: s3Client}

	bucketName := questioner.Ask("Let's create a bucket. Enter a name for your bucket:",
		demotools.NotEmpty{})
	bucketExists, err := bucketBasics.BucketExists(ctx, bucketName)
	if err != nil {
		panic(err)
	}
	if !bucketExists {
		err = bucketBasics.CreateBucket(ctx, bucketName, sdkConfig.Region)
		if err != nil {
			panic(err)
		} else {
			log.Println("Bucket created.")
		}
	}
	log.Println(strings.Repeat("-", 88))

	mibs := 30
	log.Printf("Let's create a slice of %v MiB of random bytes and upload it to your bucket. ", mibs)
	questioner.Ask("Press Enter when you're ready.")
	largeBytes := make([]byte, 1024*1024*mibs)
	_, _ = rand.Read(largeBytes)
	largeKey := "doc-example-large"
	log.Println("Uploading...")
	err = bucketBasics.UploadLargeObject(ctx, bucketName, largeKey, largeBytes)
	if err != nil {
		panic(err)
	}
	log.Printf("Uploaded %v MiB object as %v", mibs, largeKey)
	log.Println(strings.Repeat("-", 88))

	log.Printf("Let's download the %v MiB object.", mibs)
	questioner.Ask("Press Enter when you're ready.")
	log.Println("Downloading...")
	largeDownload, err := bucketBasics.DownloadLargeObject(ctx, bucketName, largeKey)
	if err != nil {
		panic(err)
	}
	log.Printf("Downloaded %v bytes.", len(largeDownload))
	log.Println(strings.Repeat("-", 88))

	if questioner.AskBool("Do you want to delete your bucket and all of its "+
		"contents? (y/n)", "y") {
		log.Println("Deleting object.")
		err = bucketBasics.DeleteObjects(ctx, bucketName, []string{largeKey})
		if err != nil {
			panic(err)
		}
		log.Println("Deleting bucket.")
		err = bucketBasics.DeleteBucket(ctx, bucketName)
		if err != nil {
			panic(err)
		}
	} else {
		log.Println("Okay. Don't forget to delete objects from your bucket to avoid charges.")
	}
	log.Println(strings.Repeat("-", 88))

	log.Println("Thanks for watching!")
	log.Println(strings.Repeat("-", 88))
}
```

## Contoh nirserver
<a name="serverless_examples"></a>

### Menginvokasi fungsi Lambda dari pemicu Amazon S3
<a name="serverless_S3_Lambda_go_2_topic"></a>

Contoh kode berikut menunjukkan cara mengimplementasikan fungsi Lambda yang menerima peristiwa yang dipicu dengan mengunggah objek ke bucket S3. Fungsi ini mengambil nama bucket S3 dan kunci objek dari parameter peristiwa dan memanggil Amazon S3 API untuk mengambil dan mencatat jenis konten objek.

**SDK untuk Go V2**  
 Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di repositori [contoh Nirserver](https://github.com/aws-samples/serverless-snippets/tree/main/integration-s3-to-lambda). 
Menggunakan peristiwa S3 dengan Lambda menggunakan Go.  

```
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package main

import (
	"context"
	"log"

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

func handler(ctx context.Context, s3Event events.S3Event) error {
	sdkConfig, err := config.LoadDefaultConfig(ctx)
	if err != nil {
		log.Printf("failed to load default config: %s", err)
		return err
	}
	s3Client := s3.NewFromConfig(sdkConfig)

	for _, record := range s3Event.Records {
		bucket := record.S3.Bucket.Name
		key := record.S3.Object.URLDecodedKey
		headOutput, err := s3Client.HeadObject(ctx, &s3.HeadObjectInput{
			Bucket: &bucket,
			Key:    &key,
		})
		if err != nil {
			log.Printf("error getting head of object %s/%s: %s", bucket, key, err)
			return err
		}
		log.Printf("successfully retrieved %s/%s of type %s", bucket, key, *headOutput.ContentType)
	}

	return nil
}

func main() {
	lambda.Start(handler)
}
```