-
Notifications
You must be signed in to change notification settings - Fork 0
/
s3.go
124 lines (104 loc) · 2.77 KB
/
s3.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
package s3
import (
"bytes"
"context"
"errors"
"fmt"
"io"
"strings"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/aws/aws-sdk-go/service/s3/s3manager"
"github.com/davidmanzanares/dsd/types"
)
type S3 struct {
path string
region string
}
func Create(service string) (types.Provider, error) {
bucket, _, err := parseURL(service)
if err != nil {
return nil, err
}
region, err := s3manager.GetBucketRegion(context.Background(), session.Must(session.NewSession()), bucket, "eu-west-1")
if err != nil {
return nil, err
}
return &S3{path: service, region: region}, nil
}
func (s *S3) GetAsset(name string, writer io.Writer) error {
return s.get("/assets/"+name, writer)
}
func (s *S3) PushAsset(name string, reader io.Reader) error {
return s.push("/assets/"+name, reader)
}
func (s *S3) GetCurrentVersion() (types.Version, error) {
buffer := bytes.NewBuffer(nil)
err := s.get("/VERSION", buffer)
if err != nil {
return types.Version{}, fmt.Errorf("S3 error getting version: %s", err.Error())
}
v, err := types.DeserializeVersion(buffer.Bytes())
if err != nil {
return v, fmt.Errorf("Error %s\nS3 returned: \"%s\"\n", err.Error(), buffer.String())
}
return v, err
}
func (s *S3) PushVersion(v types.Version) error {
buff, err := v.Serialize()
if err != nil {
return err
}
return s.push("/VERSION", bytes.NewReader(buff))
}
func (s *S3) get(path string, writer io.Writer) error {
bucket, key, err := parseURL(s.path + path)
if err != nil {
return err
}
sess, _ := session.NewSession(&aws.Config{Region: aws.String(s.region), Credentials: credentials.AnonymousCredentials})
downloader := s3manager.NewDownloader(sess)
buff := &aws.WriteAtBuffer{}
_, err = downloader.Download(buff, &s3.GetObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(key),
})
if err != nil {
return err
}
writer.Write(buff.Bytes())
return nil
}
func (s *S3) push(name string, reader io.Reader) error {
bucket, key, err := parseURL(s.path + name)
if err != nil {
return err
}
sess, _ := session.NewSession(&aws.Config{Region: aws.String(s.region)})
uploader := s3manager.NewUploader(sess)
_, err = uploader.Upload(&s3manager.UploadInput{
Bucket: aws.String(bucket),
Key: aws.String(key),
Body: reader,
})
if err != nil {
return err
}
return nil
}
var errInvalidURL error = errors.New("S3 service must begin with s3://")
func parseURL(s string) (bucket string, key string, err error) {
if !strings.HasPrefix(s, "s3://") {
return "", "", errInvalidURL
}
s = s[len("s3://"):]
parts := strings.SplitN(s, "/", 2)
if len(parts) == 1 {
parts = append(parts, "")
}
bucket = parts[0]
key = parts[1]
return bucket, key, err
}