-
Notifications
You must be signed in to change notification settings - Fork 0
/
dropboxfs.go
401 lines (343 loc) · 10.1 KB
/
dropboxfs.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
package dropboxfs
import (
"bytes"
"context"
"errors"
iofs "io/fs"
"path"
"strings"
"time"
"github.com/tj/go-dropbox"
"github.com/ungerik/go-fs"
"github.com/ungerik/go-fs/fsimpl"
)
const (
// Prefix of DropboxFileSystem URLs
Prefix = "dropbox://"
// Separator used in DropboxFileSystem paths
Separator = "/"
)
var (
// DefaultPermissions used for Dropbox files
DefaultPermissions = fs.UserAndGroupReadWrite
// DefaultDirPermissions used for Dropbox directories
DefaultDirPermissions = fs.UserAndGroupReadWrite + fs.AllExecute
// Make sure DropboxFileSystem implements fs.FileSystem
_ fs.FileSystem = new(fileSystem)
)
// fileSystem implements fs.FileSystem for a Dropbox app.
type fileSystem struct {
id string
prefix string
client *dropbox.Client
fileInfoCache *fs.FileInfoCache
}
// NewAndRegister returns a new fs.FileSystem for a Dropbox with
// the passed accessToken and registers it.
func NewAndRegister(accessToken string, cacheTimeout time.Duration) fs.FileSystem {
dbfs := &fileSystem{
prefix: Prefix + fsimpl.RandomString(),
client: dropbox.New(dropbox.NewConfig(accessToken)),
fileInfoCache: fs.NewFileInfoCache(cacheTimeout),
}
fs.Register(dbfs)
return dbfs
}
func (dbfs *fileSystem) wrapErrNotExist(filePath string, err error) error {
if err != nil && strings.HasPrefix(err.Error(), "path/not_found/") {
return fs.NewErrDoesNotExist(dbfs.File(filePath))
}
return err
}
func (dbfs *fileSystem) ReadableWritable() (readable, writable bool) {
return true, true
}
func (dbfs *fileSystem) RootDir() fs.File {
return fs.File(dbfs.prefix + Separator)
}
func (dbfs *fileSystem) ID() (string, error) {
if dbfs.id == "" {
account, err := dbfs.client.Users.GetCurrentAccount()
if err != nil {
return "", err
}
dbfs.id = account.AccountID
}
return dbfs.id, nil
}
func (dbfs *fileSystem) Prefix() string {
return dbfs.prefix
}
func (dbfs *fileSystem) Name() string {
return "Dropbox file system"
}
// String implements the fmt.Stringer interface.
func (dbfs *fileSystem) String() string {
return dbfs.Name() + " with prefix " + dbfs.Prefix()
}
func (dbfs *fileSystem) File(filePath string) fs.File {
return dbfs.JoinCleanFile(filePath)
}
func (dbfs *fileSystem) JoinCleanFile(uriParts ...string) fs.File {
return fs.File(dbfs.prefix + dbfs.JoinCleanPath(uriParts...))
}
func (dbfs *fileSystem) URL(cleanPath string) string {
return dbfs.prefix + cleanPath
}
func (dbfs *fileSystem) CleanPathFromURI(uri string) string {
return strings.TrimPrefix(uri, dbfs.prefix)
}
func (dbfs *fileSystem) JoinCleanPath(uriParts ...string) string {
return fsimpl.JoinCleanPath(uriParts, dbfs.prefix, Separator)
}
func (dbfs *fileSystem) SplitPath(filePath string) []string {
return fsimpl.SplitPath(filePath, dbfs.prefix, Separator)
}
func (dbfs *fileSystem) Separator() string {
return Separator
}
func (*fileSystem) MatchAnyPattern(name string, patterns []string) (bool, error) {
return fsimpl.MatchAnyPattern(name, patterns)
}
func (*fileSystem) SplitDirAndName(filePath string) (dir, name string) {
return fsimpl.SplitDirAndName(filePath, 0, Separator)
}
func (dbfs *fileSystem) IsAbsPath(filePath string) bool {
return path.IsAbs(filePath)
}
func (dbfs *fileSystem) AbsPath(filePath string) string {
if !path.IsAbs(filePath) {
filePath = Separator + filePath
}
return path.Clean(filePath)
}
func metadataToFileInfo(meta *dropbox.Metadata) *fs.FileInfo {
var info fs.FileInfo
info.Name = meta.Name
info.Exists = true
info.IsRegular = true
info.IsDir = meta.Tag == "folder"
info.IsHidden = len(meta.Name) > 0 && meta.Name[0] == '.'
info.Size = int64(meta.Size)
info.Modified = meta.ServerModified
if info.IsDir {
info.Permissions = DefaultDirPermissions
} else {
info.Permissions = DefaultPermissions
}
// info.ContentHash = meta.ContentHash
return &info
}
// info returns FileInfo
func (dbfs *fileSystem) info(filePath string) *fs.FileInfo {
// The root folder is unsupported by the API
if filePath == "/" {
return &fs.FileInfo{
Name: "",
Exists: true,
IsRegular: true,
IsDir: true,
Permissions: DefaultDirPermissions,
}
}
if cachedInfo, ok := dbfs.fileInfoCache.Get(filePath); ok {
return cachedInfo
}
meta, err := dbfs.client.Files.GetMetadata(
&dropbox.GetMetadataInput{
Path: filePath,
},
)
if err != nil {
dbfs.fileInfoCache.Delete(filePath)
// fmt.Println(meta, err)
return new(fs.FileInfo)
}
info := metadataToFileInfo(&meta.Metadata)
if dbfs.fileInfoCache != nil {
dbfs.fileInfoCache.Put(filePath, info)
}
return info
}
func (dbfs *fileSystem) Stat(filePath string) (iofs.FileInfo, error) {
info := dbfs.info(filePath)
if !info.Exists {
return nil, fs.NewErrDoesNotExist(fs.File(filePath))
}
return info.StdFileInfo(), nil
}
func (dbfs *fileSystem) Exists(filePath string) bool {
return dbfs.info(filePath).Exists
}
func (dbfs *fileSystem) IsHidden(filePath string) bool {
name := path.Base(filePath)
return len(name) > 0 && name[0] == '.'
}
func (dbfs *fileSystem) IsSymbolicLink(filePath string) bool {
return false
}
func (dbfs *fileSystem) listDirInfo(ctx context.Context, dirPath string, callback func(*fs.FileInfo) error, patterns []string, recursive bool) (err error) {
if ctx.Err() != nil {
return ctx.Err()
}
info := dbfs.info(dirPath)
if !info.Exists {
return fs.NewErrDoesNotExist(dbfs.File(dirPath))
}
if !info.IsDir {
return fs.NewErrIsNotDirectory(dbfs.File(dirPath))
}
var cursor string
for {
if ctx.Err() != nil {
return ctx.Err()
}
var out *dropbox.ListFolderOutput
if cursor == "" {
out, err = dbfs.client.Files.ListFolder(
&dropbox.ListFolderInput{
Path: dirPath,
Recursive: recursive,
},
)
} else {
out, err = dbfs.client.Files.ListFolderContinue(
&dropbox.ListFolderContinueInput{
Cursor: cursor,
},
)
}
if err != nil {
return dbfs.wrapErrNotExist(dirPath, err)
}
cursor = out.Cursor
// fmt.Println("out.Entries", len(out.Entries))
for _, entry := range out.Entries {
// fmt.Println(entry)
match, err := fsimpl.MatchAnyPattern(entry.Name, patterns)
if match {
info := metadataToFileInfo(entry)
if dbfs.fileInfoCache != nil {
dbfs.fileInfoCache.Put(entry.PathDisplay, info)
}
// file := dbfs.File(entry.PathDisplay)
err = callback(info)
}
if err != nil {
return err
}
}
if !out.HasMore {
break
}
}
return nil
}
func (dbfs *fileSystem) ListDirInfo(ctx context.Context, dirPath string, callback func(*fs.FileInfo) error, patterns []string) (err error) {
return dbfs.listDirInfo(ctx, dirPath, callback, patterns, true)
}
func (dbfs *fileSystem) ListDirInfoRecursive(ctx context.Context, dirPath string, callback func(*fs.FileInfo) error, patterns []string) (err error) {
return dbfs.listDirInfo(ctx, dirPath, callback, patterns, true)
}
func (dbfs *fileSystem) Touch(filePath string, perm []fs.Permissions) error {
if dbfs.info(filePath).Exists {
return errors.New("Touch can't change time on Dropbox")
}
return dbfs.WriteAll(context.Background(), filePath, nil, perm)
}
func (dbfs *fileSystem) MakeDir(dirPath string, perm []fs.Permissions) error {
_, err := dbfs.client.Files.CreateFolder(&dropbox.CreateFolderInput{Path: dirPath})
return dbfs.wrapErrNotExist(dirPath, err)
}
func (dbfs *fileSystem) ReadAll(ctx context.Context, filePath string) ([]byte, error) {
if ctx.Err() != nil {
return nil, ctx.Err()
}
out, err := dbfs.client.Files.Download(&dropbox.DownloadInput{Path: filePath})
if err != nil {
return nil, dbfs.wrapErrNotExist(filePath, err)
}
defer out.Body.Close()
return fs.ReadAllContext(ctx, out.Body)
}
func (dbfs *fileSystem) WriteAll(ctx context.Context, filePath string, data []byte, perm []fs.Permissions) error {
if ctx.Err() != nil {
return ctx.Err()
}
_, err := dbfs.client.Files.Upload(
&dropbox.UploadInput{
Path: filePath,
Mode: dropbox.WriteModeOverwrite,
Mute: true,
Reader: bytes.NewBuffer(data),
},
)
return dbfs.wrapErrNotExist(filePath, err)
}
func (dbfs *fileSystem) OpenReader(filePath string) (iofs.File, error) {
info, err := dbfs.Stat(filePath)
if err != nil {
return nil, err
}
data, err := dbfs.ReadAll(context.Background(), filePath)
if err != nil {
return nil, err
}
return fsimpl.NewReadonlyFileBuffer(data, info), nil
}
func (dbfs *fileSystem) OpenWriter(filePath string, perm []fs.Permissions) (fs.WriteCloser, error) {
if !dbfs.info(path.Dir(filePath)).IsDir {
return nil, fs.NewErrIsNotDirectory(dbfs.File(path.Dir(filePath)))
}
var fileBuffer *fsimpl.FileBuffer
fileBuffer = fsimpl.NewFileBufferWithClose(nil, func() error {
return dbfs.WriteAll(context.Background(), filePath, fileBuffer.Bytes(), nil)
})
return fileBuffer, nil
}
func (dbfs *fileSystem) OpenReadWriter(filePath string, perm []fs.Permissions) (fs.ReadWriteSeekCloser, error) {
data, err := dbfs.ReadAll(context.Background(), filePath)
if err != nil {
return nil, err
}
var fileBuffer *fsimpl.FileBuffer
fileBuffer = fsimpl.NewFileBufferWithClose(data, func() error {
return dbfs.WriteAll(context.Background(), filePath, fileBuffer.Bytes(), nil)
})
return fileBuffer, nil
}
func (dbfs *fileSystem) CopyFile(ctx context.Context, srcFile string, destFile string, buf *[]byte) error {
if ctx.Err() != nil {
return ctx.Err()
}
_, err := dbfs.client.Files.Copy(&dropbox.CopyInput{
FromPath: srcFile,
ToPath: destFile,
})
return dbfs.wrapErrNotExist(srcFile, err)
}
func (dbfs *fileSystem) Move(filePath string, destPath string) error {
// if !dbfs.Stat(filePath).Exists {
// return NewErrDoesNotExist(File(filePath))
// }
// if dbfs.Stat(destPath).IsDir {
// destPath = filepath.Join(destPath, dbfs.FileName(filePath))
// }
_, err := dbfs.client.Files.Move(&dropbox.MoveInput{
FromPath: filePath,
ToPath: destPath,
})
return dbfs.wrapErrNotExist(filePath, err)
}
func (dbfs *fileSystem) Remove(filePath string) error {
_, err := dbfs.client.Files.Delete(&dropbox.DeleteInput{Path: filePath})
return dbfs.wrapErrNotExist(filePath, err)
}
func (dbfs *fileSystem) Close() error {
if dbfs.id == "" {
return nil // already closed
}
fs.Unregister(dbfs)
dbfs.id = ""
return nil
}