forked from dutchcoders/transfer.sh
/
storage.go
565 lines (444 loc) · 13.1 KB
/
storage.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
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
package server
import (
"encoding/json"
"fmt"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3/s3manager"
"io"
"io/ioutil"
"log"
"mime"
"net/http"
"os"
"path/filepath"
"strings"
"github.com/aws/aws-sdk-go/service/s3"
"golang.org/x/net/context"
"golang.org/x/oauth2"
"golang.org/x/oauth2/google"
"google.golang.org/api/drive/v3"
"google.golang.org/api/googleapi"
)
type Storage interface {
Get(token string, filename string) (reader io.ReadCloser, contentType string, contentLength uint64, err error)
Head(token string, filename string) (contentType string, contentLength uint64, err error)
Put(token string, filename string, reader io.Reader, contentType string, contentLength uint64) error
Delete(token string, filename string) error
IsNotExist(err error) bool
Type() string
}
type LocalStorage struct {
Storage
basedir string
logger *log.Logger
}
func NewLocalStorage(basedir string, logger *log.Logger) (*LocalStorage, error) {
return &LocalStorage{basedir: basedir, logger: logger}, nil
}
func (s *LocalStorage) Type() string {
return "local"
}
func (s *LocalStorage) Head(token string, filename string) (contentType string, contentLength uint64, err error) {
path := filepath.Join(s.basedir, token, filename)
var fi os.FileInfo
if fi, err = os.Lstat(path); err != nil {
return
}
contentLength = uint64(fi.Size())
contentType = mime.TypeByExtension(filepath.Ext(filename))
return
}
func (s *LocalStorage) Get(token string, filename string) (reader io.ReadCloser, contentType string, contentLength uint64, err error) {
path := filepath.Join(s.basedir, token, filename)
// content type , content length
if reader, err = os.Open(path); err != nil {
return
}
var fi os.FileInfo
if fi, err = os.Lstat(path); err != nil {
return
}
contentLength = uint64(fi.Size())
contentType = mime.TypeByExtension(filepath.Ext(filename))
return
}
func (s *LocalStorage) Delete(token string, filename string) (err error) {
metadata := filepath.Join(s.basedir, token, fmt.Sprintf("%s.metadata", filename))
os.Remove(metadata)
path := filepath.Join(s.basedir, token, filename)
err = os.Remove(path)
return
}
func (s *LocalStorage) IsNotExist(err error) bool {
if err == nil {
return false
}
return os.IsNotExist(err)
}
func (s *LocalStorage) Put(token string, filename string, reader io.Reader, contentType string, contentLength uint64) error {
var f io.WriteCloser
var err error
path := filepath.Join(s.basedir, token)
if err = os.Mkdir(path, 0700); err != nil && !os.IsExist(err) {
return err
}
if f, err = os.OpenFile(filepath.Join(path, filename), os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600); err != nil {
return err
}
defer f.Close()
if _, err = io.Copy(f, reader); err != nil {
return err
}
return nil
}
type S3Storage struct {
Storage
bucket string
session *session.Session
s3 *s3.S3
logger *log.Logger
noMultipart bool
}
func NewS3Storage(accessKey, secretKey, bucketName, region, endpoint string, logger *log.Logger, disableMultipart bool) (*S3Storage, error) {
sess := getAwsSession(accessKey, secretKey, region, endpoint)
return &S3Storage{bucket: bucketName, s3: s3.New(sess), session: sess, logger: logger, noMultipart: disableMultipart}, nil
}
func (s *S3Storage) Type() string {
return "s3"
}
func (s *S3Storage) Head(token string, filename string) (contentType string, contentLength uint64, err error) {
key := fmt.Sprintf("%s/%s", token, filename)
headRequest := &s3.HeadObjectInput{
Bucket: aws.String(s.bucket),
Key: aws.String(key),
}
// content type , content length
response, err := s.s3.HeadObject(headRequest)
if err != nil {
return
}
if response.ContentType != nil {
contentType = *response.ContentType
}
if response.ContentLength != nil {
contentLength = uint64(*response.ContentLength)
}
return
}
func (s *S3Storage) IsNotExist(err error) bool {
if err == nil {
return false
}
if aerr, ok := err.(awserr.Error); ok {
switch aerr.Code() {
case s3.ErrCodeNoSuchKey:
return true
}
}
return false
}
func (s *S3Storage) Get(token string, filename string) (reader io.ReadCloser, contentType string, contentLength uint64, err error) {
key := fmt.Sprintf("%s/%s", token, filename)
getRequest := &s3.GetObjectInput{
Bucket: aws.String(s.bucket),
Key: aws.String(key),
}
response, err := s.s3.GetObject(getRequest)
if err != nil {
return
}
if response.ContentType != nil {
contentType = *response.ContentType
}
if response.ContentLength != nil {
contentLength = uint64(*response.ContentLength)
}
reader = response.Body
return
}
func (s *S3Storage) Delete(token string, filename string) (err error) {
metadata := fmt.Sprintf("%s/%s.metadata", token, filename)
deleteRequest := &s3.DeleteObjectInput{
Bucket: aws.String(s.bucket),
Key: aws.String(metadata),
}
_, err = s.s3.DeleteObject(deleteRequest)
if err != nil {
return
}
key := fmt.Sprintf("%s/%s", token, filename)
deleteRequest = &s3.DeleteObjectInput{
Bucket: aws.String(s.bucket),
Key: aws.String(key),
}
_, err = s.s3.DeleteObject(deleteRequest)
return
}
func (s *S3Storage) Put(token string, filename string, reader io.Reader, contentType string, contentLength uint64) (err error) {
key := fmt.Sprintf("%s/%s", token, filename)
s.logger.Printf("Uploading file %s to S3 Bucket", filename)
var concurrency int
if !s.noMultipart {
concurrency = 20
} else {
concurrency = 1
}
// Create an uploader with the session and custom options
uploader := s3manager.NewUploader(s.session, func(u *s3manager.Uploader) {
u.PartSize = (1 << 20) * 5 // The minimum/default allowed part size is 5MB
u.Concurrency = concurrency // default is 5
u.MaxUploadParts = concurrency
u.LeavePartsOnError = false
})
_, err = uploader.Upload(&s3manager.UploadInput{
Bucket: aws.String(s.bucket),
Key: aws.String(key),
Body: reader,
})
return
}
type GDrive struct {
service *drive.Service
rootId string
basedir string
localConfigPath string
chunkSize int
logger *log.Logger
}
func NewGDriveStorage(clientJsonFilepath string, localConfigPath string, basedir string, chunkSize int, logger *log.Logger) (*GDrive, error) {
b, err := ioutil.ReadFile(clientJsonFilepath)
if err != nil {
return nil, err
}
// If modifying these scopes, delete your previously saved client_secret.json.
config, err := google.ConfigFromJSON(b, drive.DriveScope, drive.DriveMetadataScope)
if err != nil {
return nil, err
}
srv, err := drive.New(getGDriveClient(config, localConfigPath, logger))
if err != nil {
return nil, err
}
chunkSize = chunkSize * 1024 * 1024
storage := &GDrive{service: srv, basedir: basedir, rootId: "", localConfigPath: localConfigPath, chunkSize: chunkSize, logger: logger}
err = storage.setupRoot()
if err != nil {
return nil, err
}
return storage, nil
}
const GDriveRootConfigFile = "root_id.conf"
const GDriveTokenJsonFile = "token.json"
const GDriveDirectoryMimeType = "application/vnd.google-apps.folder"
func (s *GDrive) setupRoot() error {
rootFileConfig := filepath.Join(s.localConfigPath, GDriveRootConfigFile)
rootId, err := ioutil.ReadFile(rootFileConfig)
if err != nil && !os.IsNotExist(err) {
return err
}
if string(rootId) != "" {
s.rootId = string(rootId)
return nil
}
dir := &drive.File{
Name: s.basedir,
MimeType: GDriveDirectoryMimeType,
}
di, err := s.service.Files.Create(dir).Fields("id").Do()
if err != nil {
return err
}
s.rootId = di.Id
err = ioutil.WriteFile(rootFileConfig, []byte(s.rootId), os.FileMode(0600))
if err != nil {
return err
}
return nil
}
func (s *GDrive) hasChecksum(f *drive.File) bool {
return f.Md5Checksum != ""
}
func (s *GDrive) list(nextPageToken string, q string) (*drive.FileList, error) {
return s.service.Files.List().Fields("nextPageToken, files(id, name, mimeType)").Q(q).PageToken(nextPageToken).Do()
}
func (s *GDrive) findId(filename string, token string) (string, error) {
filename = strings.Replace(filename, `'`, `\'`, -1)
filename = strings.Replace(filename, `"`, `\"`, -1)
fileId, tokenId, nextPageToken := "", "", ""
q := fmt.Sprintf("'%s' in parents and name='%s' and mimeType='%s' and trashed=false", s.rootId, token, GDriveDirectoryMimeType)
l, err := s.list(nextPageToken, q)
if err != nil {
return "", err
}
for 0 < len(l.Files) {
for _, fi := range l.Files {
tokenId = fi.Id
break
}
if l.NextPageToken == "" {
break
}
l, err = s.list(l.NextPageToken, q)
}
if filename == "" {
return tokenId, nil
} else if tokenId == "" {
return "", fmt.Errorf("Cannot find file %s/%s", token, filename)
}
q = fmt.Sprintf("'%s' in parents and name='%s' and mimeType!='%s' and trashed=false", tokenId, filename, GDriveDirectoryMimeType)
l, err = s.list(nextPageToken, q)
if err != nil {
return "", err
}
for 0 < len(l.Files) {
for _, fi := range l.Files {
fileId = fi.Id
break
}
if l.NextPageToken == "" {
break
}
l, err = s.list(l.NextPageToken, q)
}
if fileId == "" {
return "", fmt.Errorf("Cannot find file %s/%s", token, filename)
}
return fileId, nil
}
func (s *GDrive) Type() string {
return "gdrive"
}
func (s *GDrive) Head(token string, filename string) (contentType string, contentLength uint64, err error) {
var fileId string
fileId, err = s.findId(filename, token)
if err != nil {
return
}
var fi *drive.File
if fi, err = s.service.Files.Get(fileId).Fields("mimeType", "size").Do(); err != nil {
return
}
contentLength = uint64(fi.Size)
contentType = fi.MimeType
return
}
func (s *GDrive) Get(token string, filename string) (reader io.ReadCloser, contentType string, contentLength uint64, err error) {
var fileId string
fileId, err = s.findId(filename, token)
if err != nil {
return
}
var fi *drive.File
fi, err = s.service.Files.Get(fileId).Fields("mimeType", "size", "md5Checksum").Do()
if !s.hasChecksum(fi) {
err = fmt.Errorf("Cannot find file %s/%s", token, filename)
return
}
contentLength = uint64(fi.Size)
contentType = fi.MimeType
ctx := context.Background()
var res *http.Response
res, err = s.service.Files.Get(fileId).Context(ctx).Download()
if err != nil {
return
}
reader = res.Body
return
}
func (s *GDrive) Delete(token string, filename string) (err error) {
metadata, _ := s.findId(fmt.Sprintf("%s.metadata", filename), token)
s.service.Files.Delete(metadata).Do()
var fileId string
fileId, err = s.findId(filename, token)
if err != nil {
return
}
err = s.service.Files.Delete(fileId).Do()
return
}
func (s *GDrive) IsNotExist(err error) bool {
if err != nil {
if e, ok := err.(*googleapi.Error); ok {
return e.Code == http.StatusNotFound
}
}
return false
}
func (s *GDrive) Put(token string, filename string, reader io.Reader, contentType string, contentLength uint64) error {
dirId, err := s.findId("", token)
if err != nil {
return err
}
if dirId == "" {
dir := &drive.File{
Name: token,
Parents: []string{s.rootId},
MimeType: GDriveDirectoryMimeType,
}
di, err := s.service.Files.Create(dir).Fields("id").Do()
if err != nil {
return err
}
dirId = di.Id
}
// Instantiate empty drive file
dst := &drive.File{
Name: filename,
Parents: []string{dirId},
MimeType: contentType,
}
ctx := context.Background()
_, err = s.service.Files.Create(dst).Context(ctx).Media(reader, googleapi.ChunkSize(s.chunkSize)).Do()
if err != nil {
return err
}
return nil
}
// Retrieve a token, saves the token, then returns the generated client.
func getGDriveClient(config *oauth2.Config, localConfigPath string, logger *log.Logger) *http.Client {
tokenFile := filepath.Join(localConfigPath, GDriveTokenJsonFile)
tok, err := gDriveTokenFromFile(tokenFile)
if err != nil {
tok = getGDriveTokenFromWeb(config, logger)
saveGDriveToken(tokenFile, tok, logger)
}
return config.Client(context.Background(), tok)
}
// Request a token from the web, then returns the retrieved token.
func getGDriveTokenFromWeb(config *oauth2.Config, logger *log.Logger) *oauth2.Token {
authURL := config.AuthCodeURL("state-token", oauth2.AccessTypeOffline)
fmt.Printf("Go to the following link in your browser then type the "+
"authorization code: \n%v\n", authURL)
var authCode string
if _, err := fmt.Scan(&authCode); err != nil {
logger.Fatalf("Unable to read authorization code %v", err)
}
tok, err := config.Exchange(context.TODO(), authCode)
if err != nil {
logger.Fatalf("Unable to retrieve token from web %v", err)
}
return tok
}
// Retrieves a token from a local file.
func gDriveTokenFromFile(file string) (*oauth2.Token, error) {
f, err := os.Open(file)
defer f.Close()
if err != nil {
return nil, err
}
tok := &oauth2.Token{}
err = json.NewDecoder(f).Decode(tok)
return tok, err
}
// Saves a token to a file path.
func saveGDriveToken(path string, token *oauth2.Token, logger *log.Logger) {
logger.Printf("Saving credential file to: %s\n", path)
f, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
defer f.Close()
if err != nil {
logger.Fatalf("Unable to cache oauth token: %v", err)
}
json.NewEncoder(f).Encode(token)
}