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/
storage.go
83 lines (66 loc) · 1.59 KB
/
storage.go
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package dao
import (
"context"
"io/ioutil"
"time"
"cloud.google.com/go/storage"
)
var (
gcsAPITimeout = 5 * time.Minute
)
// NewStorage creates a new Cloud Storage Manager
func NewStorage(c *storage.Client) StorageDao {
return &storageDao{
client: c,
}
}
type storageDao struct {
client *storage.Client
}
func (s *storageDao) CheckExists(bucketName, object string) (bool, error) {
ctx, cancel := context.WithTimeout(context.Background(), gcsAPITimeout)
defer cancel()
_, err := s.client.Bucket(bucketName).Object(object).Attrs(ctx)
if err == storage.ErrObjectNotExist {
return false, nil
}
if err != nil {
return false, err
}
return true, nil
}
func (s *storageDao) GetObject(bucketName, object string) ([]byte, error) {
ctx := context.Background()
r, err := s.client.
Bucket(bucketName).
Object(object).
NewReader(ctx)
if err != nil {
return []byte{}, err
}
defer r.Close()
return ioutil.ReadAll(r)
}
func (s *storageDao) WriteObject(bucketName, dstFile, contentType string, b []byte) error {
ctx := context.Background()
w := s.client.Bucket(bucketName).Object(dstFile).NewWriter(ctx)
w.ContentType = contentType
_, err := w.Write(b)
if err != nil {
return err
}
defer w.Close()
return err
}
func (s *storageDao) RemoveObject(bucketName, path string) (bool, error) {
deleteCtx, deleteCancel := context.WithTimeout(context.Background(), gcsAPITimeout)
defer deleteCancel()
err := s.client.Bucket(bucketName).Object(path).Delete(deleteCtx)
if err == storage.ErrObjectNotExist {
return false, err
}
if err != nil {
return true, err
}
return true, nil
}