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object.go
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/
object.go
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package repository
import (
"bytes"
"context"
"fmt"
"io"
"os"
"strings"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/service/s3"
"github.com/shiba6v/eu"
)
type ObjectStorage struct {
s3cli *s3.Client
bucketName string
}
func NewObjectStorage(s3cli *s3.Client, bucketName string) ObjectStorage {
return ObjectStorage{s3cli: s3cli, bucketName: bucketName}
}
func CleansePath(s string) string {
// directory traversal
return strings.Trim(s, "/")
}
func (s ObjectStorage) GetObjectToTmp(ctx context.Context, key string) (string, error) {
key = CleansePath(key)
obj, err := s.s3cli.GetObject(ctx, &s3.GetObjectInput{
Bucket: aws.String(s.bucketName),
Key: aws.String(key),
})
if err != nil {
return "", eu.Wrap(err)
}
path := fmt.Sprintf("/tmp/%s", key)
_, err = os.Stat(path)
if !os.IsNotExist(err) {
// use cache
return path, nil
}
newFile, err := os.Create(path)
if err != nil {
return "", eu.Wrap(err)
}
defer newFile.Close()
if _, err := io.Copy(newFile, obj.Body); err != nil {
return "", eu.Wrap(err)
}
return path, nil
}
func (s ObjectStorage) UploadObject(ctx context.Context, key string, b []byte) error {
key = CleansePath(key)
path := fmt.Sprintf("/tmp/%s", key)
newFile, err := os.Create(path)
if err != nil {
return eu.Wrap(err)
}
defer newFile.Close()
if _, err := io.Copy(newFile, bytes.NewReader(b)); err != nil {
return eu.Wrap(err)
}
_, err = s.s3cli.PutObject(ctx, &s3.PutObjectInput{
Bucket: aws.String(s.bucketName),
Key: aws.String(key),
Body: bytes.NewReader(b),
})
if err != nil {
return eu.Wrap(err)
}
return nil
}