-
Notifications
You must be signed in to change notification settings - Fork 0
/
s3.go
195 lines (163 loc) · 5.18 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
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
// Package s3store implements archive.StoreAdapter with AWS S3 backend
package s3store
import (
"context"
"fmt"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/feature/s3/manager"
"github.com/aws/aws-sdk-go-v2/service/s3"
"github.com/aws/aws-sdk-go-v2/service/s3/types"
"github.com/pkg/errors"
"github.com/thomasduchatelle/dphoto/pkg/archive"
"io"
"path"
"strings"
"time"
)
type StoreAndCache interface {
archive.StoreAdapter
archive.CacheAdapter
}
func New(cfg aws.Config, bucketName string, optFns ...func(options *s3.Options)) (StoreAndCache, error) {
s3client := s3.NewFromConfig(cfg, optFns...)
presign := s3.NewPresignClient(s3client)
uploader := manager.NewUploader(s3client)
return &store{
client: s3client,
presign: presign,
s3Uploader: uploader,
bucketName: bucketName,
}, nil
}
func Must(storage StoreAndCache, err error) StoreAndCache {
if err != nil {
panic(err)
}
return storage
}
type store struct {
client *s3.Client
s3Uploader *manager.Uploader
bucketName string
presign *s3.PresignClient
}
func (s *store) Copy(origin string, destination archive.DestructuredKey) (string, error) {
if strings.HasPrefix(destination.Prefix, "/") {
return "", errors.Errorf("Prefix must not start with a '/' in key hint %+v", destination)
}
destinationKey, err := s.findUniqueFilename(destination)
if err != nil {
return "", errors.Wrapf(err, "cannot find a unique destination key")
}
_, err = s.client.CopyObject(context.TODO(), &s3.CopyObjectInput{
Bucket: &s.bucketName,
CopySource: aws.String(strings.Trim(path.Join(s.bucketName, origin), "/")),
Key: &destinationKey,
})
return destinationKey, errors.Wrapf(err, "failed to copy %s -> %s", origin, destinationKey)
}
func (s *store) Delete(keys []string) error {
for _, key := range keys {
_, err := s.client.DeleteObject(context.TODO(), &s3.DeleteObjectInput{
Bucket: &s.bucketName,
Key: &key,
})
if err != nil && !s.isNotFound(err) {
return errors.Wrapf(err, "failed to remove moved file %s", key)
}
}
return nil
}
func (s *store) Download(key string) (io.ReadCloser, error) {
reader, _, _, err := s.Get(key)
return reader, err
}
func (s *store) Get(key string) (io.ReadCloser, int, string, error) {
object, err := s.client.GetObject(context.TODO(), &s3.GetObjectInput{
Bucket: &s.bucketName,
Key: &key,
})
if s.isNotFound(err) {
return nil, 0, "", archive.NotFoundError
}
if err != nil {
return nil, 0, "", errors.Wrapf(err, "couldn't access key %s in %s bucket", key, s.bucketName)
}
return object.Body, int(*object.ContentLength), *object.ContentType, errors.Wrapf(err, "couldn't access key %s in %s bucket", key, s.bucketName)
}
func (s *store) Put(key string, mediaType string, content io.Reader) error {
_, err := s.client.PutObject(context.TODO(), &s3.PutObjectInput{
Body: manager.ReadSeekCloser(content),
Bucket: &s.bucketName,
ContentType: &mediaType,
Key: &key,
})
return errors.Wrapf(err, "failed to PUT %s in bucket %s", key, s.bucketName)
}
func (s *store) SignedURL(key string, duration time.Duration) (string, error) {
request, err := s.presign.PresignGetObject(context.TODO(), &s3.GetObjectInput{
Bucket: &s.bucketName,
Key: &key,
}, func(options *s3.PresignOptions) {
options.Expires = duration
})
return request.URL, err
}
func (s *store) Upload(keyHint archive.DestructuredKey, content io.Reader) (string, error) {
if strings.HasPrefix(keyHint.Prefix, "/") {
return "", errors.Errorf("Prefix must not start with a '/' in key hint %+v", keyHint)
}
key, err := s.findUniqueFilename(keyHint)
if err != nil {
return "", err
}
_, err = s.s3Uploader.Upload(context.TODO(), &s3.PutObjectInput{
Body: manager.ReadSeekCloser(content),
Bucket: &s.bucketName,
Key: &key,
})
return key, errors.Wrapf(err, "upload failed")
}
func (s *store) findUniqueFilename(keyHint archive.DestructuredKey) (string, error) {
filenames := make(map[string]interface{})
paginator := s3.NewListObjectsV2Paginator(s.client, &s3.ListObjectsV2Input{
Bucket: &s.bucketName,
Prefix: &keyHint.Prefix,
})
for paginator.HasMorePages() {
page, err := paginator.NextPage(context.TODO())
if err != nil {
return "", errors.Wrapf(err, "could not determine a unique name for %s?%s: failed listing s3://%s/%s*", keyHint.Prefix, keyHint.Suffix, s.bucketName, keyHint.Prefix)
}
for _, obj := range page.Contents {
filenames[*obj.Key] = nil
}
}
candidate := keyHint.Prefix + keyHint.Suffix
_, clash := filenames[candidate]
for index := 1; clash; index++ {
candidate = fmt.Sprintf("%s_%02d%s", keyHint.Prefix, index, keyHint.Suffix)
_, clash = filenames[candidate]
}
return candidate, nil
}
func (s *store) isNotFound(err error) bool {
var noSuchKeyErr *types.NoSuchKey
return errors.As(err, &noSuchKeyErr)
}
func (s *store) WalkCacheByPrefix(prefix string, observer func(string)) error {
paginator := s3.NewListObjectsV2Paginator(s.client, &s3.ListObjectsV2Input{
Bucket: &s.bucketName,
Prefix: &prefix,
})
for paginator.HasMorePages() {
page, err := paginator.NextPage(context.TODO())
if err != nil {
return err
}
for _, obj := range page.Contents {
observer(*obj.Key)
}
}
return nil
}