forked from coreos/etcd-operator
-
Notifications
You must be signed in to change notification settings - Fork 0
/
gcs_reader.go
49 lines (40 loc) · 1.48 KB
/
gcs_reader.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
// Copyright 2017 The etcd-operator Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package reader
import (
"context"
"fmt"
"io"
"github.com/coreos/etcd-operator/pkg/backup/util"
"cloud.google.com/go/storage"
)
// ensure gcsReader satisfies reader interface.
var _ Reader = &gcsReader{}
// gcsReader provides Reader implementation for reading a file from GCS
type gcsReader struct {
ctx context.Context
gcs *storage.Client
}
// NewGCSReader return a Reader implementation to read a file from GCS in the form of gcsReader
func NewGCSReader(ctx context.Context, gcs *storage.Client) Reader {
return &gcsReader{ctx, gcs}
}
// Open opens the file on path where path must be in the format "<gcs-bucket-name>/<key>"
func (gcsr *gcsReader) Open(path string) (io.ReadCloser, error) {
bucket, key, err := util.ParseBucketAndKey(path)
if err != nil {
return nil, fmt.Errorf("failed to parse gcs bucket and key: %v", err)
}
return gcsr.gcs.Bucket(bucket).Object(key).NewReader(gcsr.ctx)
}