forked from ipfs-cluster/ipfs-cluster
/
add.go
429 lines (367 loc) · 9.04 KB
/
add.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
// Package ipfsadd is a simplified copy of go-ipfs/core/coreunix/add.go
package ipfsadd
import (
"context"
"errors"
"fmt"
"io"
gopath "path"
"github.com/elastos/Elastos.NET.Hive.Cluster/api"
cid "github.com/ipfs/go-cid"
chunker "github.com/ipfs/go-ipfs-chunker"
files "github.com/ipfs/go-ipfs-files"
posinfo "github.com/ipfs/go-ipfs-posinfo"
ipld "github.com/ipfs/go-ipld-format"
logging "github.com/ipfs/go-log"
dag "github.com/ipfs/go-merkledag"
mfs "github.com/ipfs/go-mfs"
unixfs "github.com/ipfs/go-unixfs"
balanced "github.com/ipfs/go-unixfs/importer/balanced"
ihelper "github.com/ipfs/go-unixfs/importer/helpers"
trickle "github.com/ipfs/go-unixfs/importer/trickle"
)
var log = logging.Logger("coreunix")
// how many bytes of progress to wait before sending a progress update message
const progressReaderIncrement = 1024 * 256
var liveCacheSize = uint64(256 << 10)
// NewAdder Returns a new Adder used for a file add operation.
func NewAdder(ctx context.Context, ds ipld.DAGService) (*Adder, error) {
return &Adder{
ctx: ctx,
dagService: ds,
Progress: false,
Hidden: true,
Trickle: false,
Wrap: false,
Chunker: "",
}, nil
}
// Adder holds the switches passed to the `add` command.
type Adder struct {
ctx context.Context
dagService ipld.DAGService
Out chan *api.AddedOutput
Progress bool
Hidden bool
Trickle bool
RawLeaves bool
Silent bool
Wrap bool
NoCopy bool
Chunker string
root ipld.Node
mroot *mfs.Root
tempRoot cid.Cid
Prefix *cid.Prefix
CidBuilder cid.Builder
liveNodes uint64
lastFile mfs.FSNode
}
func (adder *Adder) mfsRoot() (*mfs.Root, error) {
if adder.mroot != nil {
return adder.mroot, nil
}
rnode := unixfs.EmptyDirNode()
rnode.SetCidBuilder(adder.CidBuilder)
mr, err := mfs.NewRoot(adder.ctx, adder.dagService, rnode, nil)
if err != nil {
return nil, err
}
adder.mroot = mr
return adder.mroot, nil
}
// SetMfsRoot sets `r` as the root for Adder.
func (adder *Adder) SetMfsRoot(r *mfs.Root) {
adder.mroot = r
}
// Constructs a node from reader's data, and adds it. Doesn't pin.
func (adder *Adder) add(reader io.Reader) (ipld.Node, error) {
chnk, err := chunker.FromString(reader, adder.Chunker)
if err != nil {
return nil, err
}
// Cluster: we don't do batching.
params := ihelper.DagBuilderParams{
Dagserv: adder.dagService,
RawLeaves: adder.RawLeaves,
Maxlinks: ihelper.DefaultLinksPerBlock,
NoCopy: adder.NoCopy,
CidBuilder: adder.CidBuilder,
}
if adder.Trickle {
return trickle.Layout(params.New(chnk))
}
return balanced.Layout(params.New(chnk))
}
// RootNode returns the root node of the Added.
func (adder *Adder) RootNode() (ipld.Node, error) {
// for memoizing
if adder.root != nil {
return adder.root, nil
}
mr, err := adder.mfsRoot()
if err != nil {
return nil, err
}
root, err := mr.GetDirectory().GetNode()
if err != nil {
return nil, err
}
// if not wrapping, AND one root file, use that hash as root.
if !adder.Wrap && len(root.Links()) == 1 {
nd, err := root.Links()[0].GetNode(adder.ctx, adder.dagService)
if err != nil {
return nil, err
}
root = nd
}
adder.root = root
return root, err
}
// Finalize flushes the mfs root directory and returns the mfs root node.
func (adder *Adder) Finalize() (ipld.Node, error) {
mr, err := adder.mfsRoot()
if err != nil {
return nil, err
}
var root mfs.FSNode
rootdir := mr.GetDirectory()
root = rootdir
err = root.Flush()
if err != nil {
return nil, err
}
var name string
if !adder.Wrap {
children, err := rootdir.ListNames(adder.ctx)
if err != nil {
return nil, err
}
if len(children) == 0 {
return nil, fmt.Errorf("expected at least one child dir, got none")
}
// Replace root with the first child
name = children[0]
root, err = rootdir.Child(name)
if err != nil {
// Cluster: use the last file we added
// if we have one.
if adder.lastFile == nil {
return nil, err
}
root = adder.lastFile
}
}
err = adder.outputDirs(name, root)
if err != nil {
return nil, err
}
err = mr.Close()
if err != nil {
return nil, err
}
return root.GetNode()
}
func (adder *Adder) outputDirs(path string, fsn mfs.FSNode) error {
switch fsn := fsn.(type) {
case *mfs.File:
return nil
case *mfs.Directory:
names, err := fsn.ListNames(adder.ctx)
if err != nil {
return err
}
for _, name := range names {
child, err := fsn.Child(name)
if err != nil {
// This fails when Child is of type *mfs.File
// because it tries to get them from the DAG
// service (does not implement this and returns
// a "not found" error)
// *mfs.Files are ignored in the recursive call
// anyway.
// For Cluster, we just ignore errors here.
continue
}
childpath := gopath.Join(path, name)
err = adder.outputDirs(childpath, child)
if err != nil {
return err
}
fsn.Uncache(name)
}
nd, err := fsn.GetNode()
if err != nil {
return err
}
return outputDagnode(adder.Out, path, nd)
default:
return fmt.Errorf("unrecognized fsn type: %#v", fsn)
}
}
func (adder *Adder) addNode(node ipld.Node, path string) error {
// patch it into the root
if path == "" {
path = node.Cid().String()
}
if pi, ok := node.(*posinfo.FilestoreNode); ok {
node = pi.Node
}
mr, err := adder.mfsRoot()
if err != nil {
return err
}
dir := gopath.Dir(path)
if dir != "." {
opts := mfs.MkdirOpts{
Mkparents: true,
Flush: false,
CidBuilder: adder.CidBuilder,
}
if err := mfs.Mkdir(mr, dir, opts); err != nil {
return err
}
}
if err := mfs.PutNode(mr, path, node); err != nil {
return err
}
// Cluster: cache the last file added.
// This avoids using the DAGService to get the first children
// if the MFS root when not wrapping.
lastFile, err := mfs.NewFile(path, node, nil, adder.dagService)
if err != nil {
return err
}
adder.lastFile = lastFile
if !adder.Silent {
return outputDagnode(adder.Out, path, node)
}
return nil
}
// AddFile adds the given file while respecting the adder.
func (adder *Adder) AddFile(path string, file files.Node) error {
return adder.addFile(path, file)
}
func (adder *Adder) addFile(path string, nd files.Node) error {
defer nd.Close()
if adder.liveNodes >= liveCacheSize {
// TODO: A smarter cache that uses some sort of lru cache with an eviction handler
mr, err := adder.mfsRoot()
if err != nil {
return err
}
if err := mr.FlushMemFree(adder.ctx); err != nil {
return err
}
adder.liveNodes = 0
}
adder.liveNodes++
if dir := files.ToDir(nd); dir != nil {
return adder.addDir(path, dir)
}
// case for symlink
if s := files.ToSymlink(nd); s != nil {
sdata, err := unixfs.SymlinkData(s.Target)
if err != nil {
return err
}
dagnode := dag.NodeWithData(sdata)
dagnode.SetCidBuilder(adder.CidBuilder)
err = adder.dagService.Add(adder.ctx, dagnode)
if err != nil {
return err
}
return adder.addNode(dagnode, path)
}
file := files.ToFile(nd)
if file == nil {
return errors.New("expected a regular file")
}
// case for regular file
// if the progress flag was specified, wrap the file so that we can send
// progress updates to the client (over the output channel)
var reader io.Reader = file
if adder.Progress {
rdr := &progressReader{file: file, path: path, out: adder.Out}
if fi, ok := file.(files.FileInfo); ok {
reader = &progressReader2{rdr, fi}
} else {
reader = rdr
}
}
dagnode, err := adder.add(reader)
if err != nil {
return err
}
// patch it into the root
return adder.addNode(dagnode, path)
}
func (adder *Adder) addDir(path string, dir files.Directory) error {
log.Infof("adding directory: %s", path)
mr, err := adder.mfsRoot()
if err != nil {
return err
}
err = mfs.Mkdir(mr, path, mfs.MkdirOpts{
Mkparents: true,
Flush: false,
CidBuilder: adder.CidBuilder,
})
if err != nil {
return err
}
it := dir.Entries()
for it.Next() {
fpath := gopath.Join(path, it.Name())
if files.IsHidden(fpath, it.Node()) && !adder.Hidden {
log.Infof("%s is hidden, skipping", fpath)
continue
}
if err := adder.addFile(fpath, it.Node()); err != nil {
return err
}
}
return it.Err()
}
// outputDagnode sends dagnode info over the output channel
func outputDagnode(out chan *api.AddedOutput, name string, dn ipld.Node) error {
if out == nil {
return nil
}
s, err := dn.Size()
if err != nil {
return err
}
out <- &api.AddedOutput{
Cid: dn.Cid().String(),
Name: name,
Size: s,
}
return nil
}
type progressReader struct {
file io.Reader
path string
out chan *api.AddedOutput
bytes int64
lastProgress int64
}
func (i *progressReader) Read(p []byte) (int, error) {
n, err := i.file.Read(p)
i.bytes += int64(n)
if i.bytes-i.lastProgress >= progressReaderIncrement || err == io.EOF {
i.lastProgress = i.bytes
i.out <- &api.AddedOutput{
Name: i.path,
Bytes: uint64(i.bytes),
}
}
return n, err
}
type progressReader2 struct {
*progressReader
files.FileInfo
}
func (i *progressReader2) Read(p []byte) (int, error) {
return i.progressReader.Read(p)
}