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main.go
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main.go
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package main
import (
"context"
"fmt"
"log"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/service/s3"
"github.com/aws/aws-sdk-go-v2/service/s3/types"
)
const bucket string = "test-sdk-list"
const srcBucket string = "test-sdk-src"
func emptyBucket(s3client *s3.Client, ctx context.Context) error {
params := &s3.ListObjectsV2Input{
Bucket: aws.String(bucket),
}
p := s3.NewListObjectsV2Paginator(s3client, params)
for p.HasMorePages() {
page, err := p.NextPage(ctx)
if err != nil {
return fmt.Errorf("error getting the page during empty bucket: %v", err)
}
var objKeys []string
for _, object := range page.Contents {
objKeys = append(objKeys, *object.Key)
}
if len(objKeys) == 0 {
return nil
}
var objectIds []types.ObjectIdentifier
for _, key := range objKeys {
objectIds = append(objectIds, types.ObjectIdentifier{Key: aws.String(key)})
}
_, err = s3client.DeleteObjects(ctx, &s3.DeleteObjectsInput{
Bucket: aws.String(bucket),
Delete: &types.Delete{Objects: objectIds},
})
if err != nil {
return fmt.Errorf("error deleting objects from bucket %q: %v", bucket, err)
}
}
return nil
}
func uploadToAWS(client *s3.Client) error {
p := s3.NewListObjectsV2Paginator(client, &s3.ListObjectsV2Input{
Bucket: aws.String(bucket),
})
fmt.Println("list resutl:")
for p.HasMorePages() {
page, err := p.NextPage(context.TODO())
if err != nil {
return err
}
for _, obj := range page.Contents {
fmt.Println("Object: ", *obj.Key)
}
}
return nil
}
func initAWS() (*s3.Client, error) {
cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithSharedConfigProfile("dev"))
if err != nil {
return nil, fmt.Errorf("error during aws config load: %v", err)
}
client := s3.NewFromConfig(cfg)
return client, nil
}
func populateBucket(s3client *s3.Client, targetBucket, sourceBucket string, ctx context.Context) error {
params := &s3.ListObjectsV2Input{
Bucket: aws.String(sourceBucket),
}
p := s3.NewListObjectsV2Paginator(s3client, params)
for p.HasMorePages() {
page, err := p.NextPage(ctx)
if err != nil {
return fmt.Errorf("error getting the page during populate bucket: %v", err)
}
for _, object := range page.Contents {
fmt.Printf("%v/%v", sourceBucket, *object.Key)
_, err := s3client.CopyObject(ctx, &s3.CopyObjectInput{
Bucket: aws.String(targetBucket),
CopySource: aws.String(fmt.Sprintf("%v/%v", sourceBucket, *object.Key)),
Key: object.Key,
})
if err != nil {
return fmt.Errorf("failed to copy object %q: %v", *object.Key, err)
}
}
}
return nil
}
func main() {
client, err := initAWS()
if err != nil {
log.Fatal(err)
}
err = emptyBucket(client, context.TODO())
if err != nil {
log.Fatal(err)
}
err = populateBucket(client, bucket, srcBucket, context.TODO())
if err != nil {
log.Fatal(err)
}
}