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Example for GO

Installing

go get github.com/aws/aws-sdk-go-v2/aws

Example

init s3 client

func main() {
var key, secret, token, endpoint string
cfg, err := config.LoadDefaultConfig(context.TODO(),
config.WithCredentialsProvider(credentials.NewStaticCredentialsProvider(key, secret, token)),
config.WithEndpointResolverWithOptions(aws.EndpointResolverWithOptionsFunc(func(service, region string, options ...interface{}) (aws.Endpoint, error) {
return aws.Endpoint{
URL: endpoint,
}, nil
})),
)
if err != nil {
log.Fatalf("unable to load SDK config, %v", err)
}
client := s3.NewFromConfig(cfg)
}

create bucket and put object

var (
bucket = "bucketname"
objectKey = "object/key"
)
_ , err = client.CreateBucket(context.TODO(), &s3.CreateBucketInput{
Bucket: &bucket,
})
if err != nil {
log.Fatalf("unable CreateBucket %s, %v", bucket, err)
}
f, err := os.Open("/tmp/dat")
info, err := f.Stat()
if err != nil {
log.Fatalf("unable stat file, %v", err)
}
// putobject
_, err = client.PutObject(context.TODO(), &s3.PutObjectInput{
Bucket: &bucket,
Key: &objectKey,
Body: f,
ContentLength: info.Size(),
})
if err != nil {
log.Fatalf("unable put object: , %v", err)
}
ff, err := os.Open("/tmp/dat")
finfo, err := ff.Stat()
if err != nil {
log.Fatalf("unable stat file, %v", err)
}
// multipart upload
uploader := manager.NewUploader(client, func(u *manager.Uploader) {
u.PartSize = 16 * 1024 * 1024 // 16MB per part
})
_, err = uploader.Upload(context.TODO(),&s3.PutObjectInput{
Bucket: &bucket,
Key: &objectKey,
Body: ff,
ContentLength: finfo.Size(),
})

list buckets and list objects

listBucketOutPut, err := client.ListBuckets(context.TODO(), &s3.ListBucketsInput{})
if err != nil {
log.Fatalf("unable ListBuckets: , %v", err)
}
//listObjectV2
listObjectsV2Output, err := client.ListObjectsV2(context.TODO(), &s3.ListObjectsV2Input{
Bucket: &bucket,
})
if err != nil {
log.Fatalf("unable listObjectsV2: , %v", err)
}
fmt.Println(listObjectsV2Output)
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