/
service.go
83 lines (66 loc) · 1.86 KB
/
service.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
package gcp
import (
"context"
"fmt"
"io/ioutil"
"os"
"time"
"cloud.google.com/go/storage"
"google.golang.org/api/option"
"github.com/reecerussell/open-social/media"
)
var credentialJSONVar = "GOOGLE_CREDENTIAL_JSON"
// bucket is an implementation of media.Service for Google Cloud Platform's storage buckets.
type bucket struct {
bucketName string
timeoutSeconds int
client *storage.Client
}
// New returns a new instance of media.Service for GCP storeage buckets.
func New(ctx context.Context, bucketName string) (media.Service, error) {
var client *storage.Client
var err error
credJSON, ok := os.LookupEnv(credentialJSONVar)
if ok {
cred := option.WithCredentialsJSON([]byte(credJSON))
client, err = storage.NewClient(ctx, cred)
} else {
client, err = storage.NewClient(ctx)
}
if err != nil {
return nil, fmt.Errorf("failed to init client: %v", err)
}
return &bucket{
bucketName: bucketName,
timeoutSeconds: 30,
client: client,
}, nil
}
func (b *bucket) Upload(ctx context.Context, key string, data []byte) error {
ctx, cancel := context.WithTimeout(ctx, time.Second*time.Duration(b.timeoutSeconds))
defer cancel()
w := b.client.Bucket(b.bucketName).Object(key).NewWriter(ctx)
_, err := w.Write(data)
if err != nil {
return fmt.Errorf("failed to write: %v", err)
}
err = w.Close()
if err != nil {
return fmt.Errorf("failed to close writer: %v", err)
}
return nil
}
func (b *bucket) Download(ctx context.Context, key string) ([]byte, error) {
ctx, cancel := context.WithTimeout(ctx, time.Second*time.Duration(b.timeoutSeconds))
defer cancel()
r, err := b.client.Bucket(b.bucketName).Object(key).NewReader(ctx)
if err != nil {
return nil, fmt.Errorf("reader: %v", err)
}
defer r.Close()
data, err := ioutil.ReadAll(r)
if err != nil {
return nil, fmt.Errorf("read: %v", err)
}
return data, nil
}