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read.go
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read.go
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package gcs
import (
"cloud.google.com/go/storage"
"context"
"errors"
"github.com/PixoVR/pixo-golang-server-utilities/pixo-platform/blobstorage"
"google.golang.org/api/iterator"
"io"
)
func (c Client) FileExists(ctx context.Context, object blobstorage.UploadableObject) (bool, error) {
storageClient, err := storage.NewClient(ctx)
if err != nil {
return false, err
}
defer storageClient.Close()
_, err = storageClient.Bucket(c.getBucketName(object)).Object(object.GetFileLocation()).Attrs(ctx)
if err != nil {
if errors.Is(err, storage.ErrObjectNotExist) {
return false, nil
}
return false, err
}
return true, nil
}
func (c Client) FindFilesWithName(ctx context.Context, bucketName, prefix, filename string) ([]string, error) {
storageClient, err := storage.NewClient(ctx)
if err != nil {
return nil, err
}
defer storageClient.Close()
var files []string
it := storageClient.Bucket(bucketName).Objects(ctx, &storage.Query{Prefix: prefix})
for {
attrs, err := it.Next()
if errors.Is(err, iterator.Done) {
break
}
if err != nil {
return nil, err
}
if blobstorage.GetFilenameFromLocation(attrs.Name) == filename {
files = append(files, attrs.Name)
}
}
return files, nil
}
func (c Client) ReadFile(ctx context.Context, object blobstorage.UploadableObject) (io.ReadCloser, error) {
storageClient, err := storage.NewClient(ctx)
if err != nil {
return nil, err
}
defer storageClient.Close()
rc, err := storageClient.Bucket(c.getBucketName(object)).Object(object.GetFileLocation()).NewReader(ctx)
if err != nil {
return nil, err
}
return rc, nil
}