/
storage_engine.go
133 lines (109 loc) · 3 KB
/
storage_engine.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
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
package cloud
import (
"cloud.google.com/go/storage"
"context"
"fmt"
"github.com/anhdht/go-common/pkg/log"
"go.uber.org/zap"
"google.golang.org/api/iterator"
"io"
"strings"
)
type (
StorageEngine interface {
DownloadFile(ctx context.Context, bucket string, path string) ([]byte, error)
UploadFile(ctx context.Context, bucket string, path string, data []byte) error
DeleteFile(ctx context.Context, bucket string, path string) error
ListFile(ctx context.Context, bucket string, path string) ([]string, error)
}
storageEngine struct {
client *storage.Client
}
)
func NewStorageEngine() StorageEngine {
ctx := context.Background()
logger := log.Logger(ctx)
// Creates a client.
client, err := storage.NewClient(ctx)
if err != nil {
logger.Fatal("encounter error while creating new storage client", zap.Error(err))
}
return &storageEngine{
client: client,
}
}
func (ptr *storageEngine) DownloadFile(ctx context.Context, bucket string, path string) ([]byte, error) {
logger := log.Logger(ctx)
b := ptr.client.Bucket(bucket)
reader, err := b.Object(path).NewReader(ctx)
if err != nil {
logger.Error("encounter error while downloading data from: "+path, zap.Error(err))
return nil, err
}
defer reader.Close()
bytes, err := io.ReadAll(reader)
if err != nil {
logger.Error("encounter error reading data from: "+path, zap.Error(err))
return nil, err
}
return bytes, nil
}
func (ptr *storageEngine) UploadFile(ctx context.Context, bucket string, path string, data []byte) error {
logger := log.Logger(ctx)
b := ptr.client.Bucket(bucket)
writer := b.Object(path).NewWriter(ctx)
l := len(data)
count := 0
for count < l {
wrote, err := writer.Write(data[count:])
if err != nil {
logger.Error("encounter error while writing file: "+path, zap.Error(err))
return err
}
count += wrote
}
if err := writer.Close(); err != nil {
logger.Error("encounter error while closing file: "+path, zap.Error(err))
return err
}
return nil
}
func (ptr *storageEngine) DeleteFile(ctx context.Context, bucket string, path string) error {
logger := log.Logger(ctx)
b := ptr.client.Bucket(bucket)
err := b.Object(path).Delete(ctx)
if err != nil {
logger.Error(fmt.Sprintf("encounter error while deleting object in path: %s in bucket: %s",
path, bucket), zap.Error(err))
return err
}
return nil
}
func (ptr *storageEngine) ListFile(ctx context.Context, bucket string, path string) ([]string, error) {
logger := log.Logger(ctx)
if !strings.HasSuffix(path, "/") {
path = path + "/"
}
path = strings.TrimPrefix(path, "/")
logger.Sugar().Infof("travelling to gs://%s/%s", bucket, path)
b := ptr.client.Bucket(bucket)
it := b.Objects(ctx, &storage.Query{
Prefix: path,
Delimiter: "/",
})
var files []string
for {
attrs, err := it.Next()
if err == iterator.Done {
break
}
if err != nil {
return files, err
}
if strings.HasPrefix(attrs.ContentType, "image/") {
f := strings.TrimPrefix(attrs.Name, path)
files = append(files, f)
}
}
return files, nil
}