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s3.go
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s3.go
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package storage
import (
"context"
"io"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
)
var (
_ Storage = (*s3Storage)(nil)
)
type s3Storage struct {
bucket string
client *s3.S3
}
func (s *s3Storage) Delete(ctx context.Context, path string) error {
_, err := s.client.DeleteObjectWithContext(ctx, &s3.DeleteObjectInput{
Key: aws.String(path),
Bucket: aws.String(s.bucket),
})
return err
}
func NewS3Storage(config *aws.Config, bucket string) (*s3Storage, error) {
sess, err := session.NewSession(config)
if err != nil {
return nil, err
}
return &s3Storage{client: s3.New(sess), bucket: bucket}, nil
}
func (s *s3Storage) Upload(ctx context.Context, path string, reader io.ReadSeeker) error {
_, err := s.client.HeadObject(&s3.HeadObjectInput{
Bucket: aws.String(s.bucket),
Key: aws.String(path),
})
switch err.(type) {
case nil:
return &ErrObjectAlreadyExists{Key: path}
case awserr.Error:
if err.(awserr.Error).Code() != "NotFound" {
return err
}
default:
return err
}
_, err = s.client.PutObjectWithContext(ctx, &s3.PutObjectInput{
Bucket: aws.String(s.bucket),
Key: aws.String(path),
Body: reader,
StorageClass: aws.String(s3.ObjectStorageClassIntelligentTiering),
ACL: aws.String(s3.BucketCannedACLPrivate),
ContentDisposition: aws.String("attachment"),
ServerSideEncryption: aws.String(s3.ServerSideEncryptionAes256),
})
return err
}
func (s *s3Storage) Download(ctx context.Context, path string) (io.ReadCloser, error) {
out, err := s.client.GetObjectWithContext(ctx, &s3.GetObjectInput{
Bucket: aws.String(s.bucket),
Key: aws.String(path),
})
if err != nil {
return nil, err
}
return out.Body, nil
}
func (s *s3Storage) Close() error {
return nil
}