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StoreS3.go
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StoreS3.go
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package keyvaluestore
import (
"bytes"
"strings"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/aws/aws-sdk-go/service/s3/s3manager"
)
var _ Store = (*StoreS3)(nil)
type StoreS3 struct {
S3 *s3.S3
Uploader *s3manager.Uploader
Downloader *s3manager.Downloader
Bucket string
StoreName string
}
func (store *StoreS3) GetKey(key string) *string {
return aws.String(strings.Join([]string{store.StoreName, key}, "/"))
}
func (store *StoreS3) Put(key string, value []byte) (err error) {
_, err = store.Uploader.Upload(&s3manager.UploadInput{
Bucket: &store.Bucket,
Key: store.GetKey(key),
Body: bytes.NewReader(value),
})
if err != nil {
return
}
return
}
func (store *StoreS3) Get(key string) (value []byte, err error) {
var buf aws.WriteAtBuffer
_, err = store.Downloader.Download(&buf, &s3.GetObjectInput{
Bucket: &store.Bucket,
Key: store.GetKey(key),
})
if err != nil {
switch nerr := err.(type) {
case awserr.Error:
switch nerr.Code() {
case s3.ErrCodeNoSuchKey:
err = ErrNotFound
return
}
}
return
}
value = buf.Bytes()
return
}
func (store *StoreS3) Remove(key string) (err error) {
_, err = store.S3.DeleteObject(&s3.DeleteObjectInput{
Bucket: &store.Bucket,
Key: store.GetKey(key),
})
if err != nil {
return
}
return
}