1 | const pathRoot = require('path')
|
2 | const path = pathRoot.posix || pathRoot
|
3 | const { EventEmitter } = require('events')
|
4 |
|
5 | const collect = require('stream-collector')
|
6 | const thunky = require('thunky')
|
7 | const ThunkyMap = require('thunky-map')
|
8 | const unixify = require('unixify')
|
9 | const duplexify = require('duplexify')
|
10 | const through = require('through2')
|
11 | const pumpify = require('pumpify')
|
12 | const pump = require('pump')
|
13 |
|
14 | const coreByteStream = require('hypercore-byte-stream')
|
15 | const Nanoresource = require('nanoresource/emitter')
|
16 | const HypercoreProtocol = require('hypercore-protocol')
|
17 | const MountableHypertrie = require('mountable-hypertrie')
|
18 | const Corestore = require('corestore')
|
19 | const { Stat } = require('hyperdrive-schemas')
|
20 |
|
21 | const createFileDescriptor = require('./lib/fd')
|
22 | const errors = require('./lib/errors')
|
23 | const defaultCorestore = require('./lib/storage')
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24 | const TagManager = require('./lib/tagging')
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25 | const { contentKeyPair, contentOptions, ContentState } = require('./lib/content')
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26 | const { statIterator, createStatStream, createMountStream, createReaddirStream, readdirIterator } = require('./lib/iterator')
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27 |
|
28 |
|
29 | const STDIO_CAP = 20
|
30 |
|
31 | module.exports = (...args) => new Hyperdrive(...args)
|
32 | module.exports.constants = require('filesystem-constants').linux
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33 |
|
34 | class Hyperdrive extends Nanoresource {
|
35 | constructor (storage, key, opts) {
|
36 | super()
|
37 |
|
38 | if (isObject(key)) {
|
39 | opts = key
|
40 | key = null
|
41 | }
|
42 | if (!opts) opts = {}
|
43 |
|
44 | this.opts = opts
|
45 | this.key = key
|
46 | this.discoveryKey = null
|
47 | this.live = true
|
48 | this.sparse = opts.sparse !== false
|
49 | this.sparseMetadata = opts.sparseMetadata !== false
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50 |
|
51 | this._namespace = opts.namespace
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52 | this.corestore = defaultCorestore(storage, {
|
53 | ...opts,
|
54 | valueEncoding: 'binary',
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55 |
|
56 | sparse: this.sparse || this.sparseMetadata,
|
57 | extensions: opts.extensions
|
58 | })
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59 |
|
60 | if (this.corestore !== storage) this.corestore.on('error', err => this.emit('error', err))
|
61 | if (opts.namespace) {
|
62 | this.corestore = this.corestore.namespace(opts.namespace)
|
63 | }
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64 |
|
65 |
|
66 | this.metadata = null
|
67 | this.db = opts._db
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68 | this.tags = new TagManager(this)
|
69 | this.isCheckout = !!this.db
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70 |
|
71 | this._contentStates = opts._contentStates || new ThunkyMap(this._contentStateFromMetadata.bind(this))
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72 | this._fds = []
|
73 | this._writingFds = new Map()
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74 |
|
75 | this._metadataOpts = {
|
76 | key,
|
77 | sparse: this.sparseMetadata,
|
78 | keyPair: opts.keyPair,
|
79 | extensions: opts.extensions
|
80 | }
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81 |
|
82 | this.ready(onReady)
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83 |
|
84 | const self = this
|
85 |
|
86 | function onReady (err) {
|
87 | if (err) return self.emit('error', err)
|
88 | self.emit('ready')
|
89 |
|
90 | if (self._contentStates.has(self.db.feed)) return
|
91 | self._getContent(self.db.feed, noop)
|
92 | }
|
93 | }
|
94 |
|
95 | get version () {
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96 |
|
97 | return this.db.version
|
98 | }
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99 |
|
100 | get writable () {
|
101 | return this.metadata.writable
|
102 | }
|
103 |
|
104 | get contentWritable () {
|
105 | const contentState = this._contentStates.cache.get(this.db.feed)
|
106 | if (!contentState) return false
|
107 | return contentState.feed.writable
|
108 | }
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109 |
|
110 | ready (cb) {
|
111 | return this.open(cb)
|
112 | }
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113 |
|
114 | _open (cb) {
|
115 | const self = this
|
116 | return this.corestore.ready(err => {
|
117 | if (err) return cb(err)
|
118 | this.metadata = this.corestore.default(this._metadataOpts)
|
119 | this.metadata.ifAvailable.wait()
|
120 | this.db = this.db || new MountableHypertrie(this.corestore, this.key, {
|
121 | feed: this.metadata,
|
122 | sparse: this.sparseMetadata
|
123 | })
|
124 | this.db.on('hypertrie', trie => {
|
125 | this.emit('metadata-feed', trie.feed)
|
126 | this.emit('mount', trie)
|
127 | })
|
128 | this.db.on('error', err => this.emit('error', err))
|
129 |
|
130 | self.metadata.on('error', onerror)
|
131 | self.metadata.on('append', update)
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132 | self.metadata.on('extension', extension)
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133 | self.metadata.on('peer-add', peeradd)
|
134 | self.metadata.on('peer-remove', peerremove)
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135 |
|
136 | return self.metadata.ready(err => {
|
137 | if (err) return done(err)
|
138 |
|
139 | |
140 |
|
141 |
|
142 |
|
143 |
|
144 |
|
145 |
|
146 |
|
147 |
|
148 |
|
149 | if (self.metadata.writable && !self.metadata.length && !self.isCheckout) {
|
150 | initialize()
|
151 | } else {
|
152 | restore()
|
153 | }
|
154 | })
|
155 | })
|
156 |
|
157 | |
158 |
|
159 |
|
160 | function initialize () {
|
161 | self._contentStateFromKey(null, (err, contentState) => {
|
162 | if (err) return done(err)
|
163 |
|
164 | self._contentStates.cache.set(self.db.feed, contentState)
|
165 | self.db.setMetadata(contentState.feed.key)
|
166 | self.db.ready(err => {
|
167 | if (err) return done(err)
|
168 | return done(null)
|
169 | })
|
170 | })
|
171 | }
|
172 |
|
173 | |
174 |
|
175 |
|
176 |
|
177 |
|
178 | function restore (keyPair) {
|
179 | self.db.ready(err => {
|
180 | if (err) return done(err)
|
181 | if (self.metadata.has(0)) self._getContent(self.db.feed, done)
|
182 | else done(null)
|
183 | })
|
184 | }
|
185 |
|
186 | function done (err) {
|
187 | self.metadata.ifAvailable.continue()
|
188 | if (err) return cb(err)
|
189 | self.key = self.metadata.key
|
190 | self.discoveryKey = self.metadata.discoveryKey
|
191 | return cb(null)
|
192 | }
|
193 |
|
194 | function onerror (err) {
|
195 | if (err) self.emit('error', err)
|
196 | return cb(err)
|
197 | }
|
198 |
|
199 | function update () {
|
200 | self.emit('update')
|
201 | }
|
202 |
|
203 | function extension(name, message, peer) {
|
204 | self.emit('extension', name, message, peer)
|
205 | }
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206 |
|
207 | function peeradd(peer) {
|
208 | self.emit('peer-add', peer)
|
209 | }
|
210 |
|
211 | function peerremove(peer) {
|
212 | self.emit('peer-remove', peer)
|
213 | }
|
214 | }
|
215 |
|
216 | _getContent (metadata, cb) {
|
217 | this._contentStates.get(metadata, cb)
|
218 | }
|
219 |
|
220 | _contentStateFromMetadata (metadata, cb) {
|
221 | MountableHypertrie.getMetadata(metadata, (err, publicKey) => {
|
222 | if (err) return cb(err)
|
223 | this._contentStateFromKey(publicKey, cb)
|
224 | })
|
225 | }
|
226 |
|
227 | _contentStateFromKey (publicKey, cb) {
|
228 | const contentOpts = { key: publicKey, ...contentOptions(this), cache: { data: false } }
|
229 | try {
|
230 | var feed = this.corestore.get(contentOpts)
|
231 | } catch (err) {
|
232 | return cb(err)
|
233 | }
|
234 |
|
235 | feed.on('error', err => this.emit('error', err))
|
236 | feed.ready(err => {
|
237 | if (err) return cb(err)
|
238 | this.emit('content-feed', feed)
|
239 | return cb(null, new ContentState(feed))
|
240 | })
|
241 | }
|
242 |
|
243 | _putStat (name, stat, opts, cb) {
|
244 | if (typeof opts === 'function') return this._putStat(name, stat, null, opts)
|
245 | try {
|
246 | var encoded = stat.encode()
|
247 | } catch (err) {
|
248 | return cb(err)
|
249 | }
|
250 | this.db.put(name, encoded, opts, err => {
|
251 | if (err) return cb(err)
|
252 | return cb(null, stat)
|
253 | })
|
254 | }
|
255 |
|
256 | _update (name, stat, cb) {
|
257 | name = fixName(name)
|
258 |
|
259 | this.db.get(name, (err, st) => {
|
260 | if (err) return cb(err)
|
261 | if (!st) return cb(new errors.FileNotFound(name))
|
262 | try {
|
263 | var decoded = Stat.decode(st.value)
|
264 | } catch (err) {
|
265 | return cb(err)
|
266 | }
|
267 | const oldMetadata = decoded.metadata
|
268 | const newStat = Object.assign(decoded, stat)
|
269 | if (stat.metadata) {
|
270 | newStat.metadata = Object.assign({}, oldMetadata || {}, stat.metadata)
|
271 | }
|
272 | return this._putStat(name, newStat, { flags: st.flags }, cb)
|
273 | })
|
274 | }
|
275 |
|
276 | _upsert (name, stat, cb) {
|
277 | name = fixName(name)
|
278 |
|
279 | this.db.get(name, (err, st) => {
|
280 | if (err) return cb(err)
|
281 | if (!st) {
|
282 | var decoded = Stat.file()
|
283 | }
|
284 | else {
|
285 | try {
|
286 | var decoded = Stat.decode(st.value)
|
287 | } catch (err) {
|
288 | return cb(err)
|
289 | }
|
290 | }
|
291 | const oldMetadata = decoded.metadata
|
292 | const newStat = Object.assign(decoded, stat)
|
293 | if (stat.metadata) {
|
294 | newStat.metadata = Object.assign({}, oldMetadata || {}, stat.metadata)
|
295 | }
|
296 | return this._putStat(name, newStat, { flags: st ? st.flags : 0 }, cb)
|
297 | })
|
298 | }
|
299 |
|
300 | getContent (cb) {
|
301 | if (!this.db) return cb(null, null)
|
302 | this._getContent(this.db.feed, (err, contentState) => {
|
303 | if (err) return cb(err)
|
304 | return cb(null, contentState.feed)
|
305 | })
|
306 | }
|
307 |
|
308 | open (name, flags, cb) {
|
309 | if (!name || typeof name === 'function') return super.open(name)
|
310 | name = fixName(name)
|
311 |
|
312 | this.ready(err => {
|
313 | if (err) return cb(err)
|
314 | createFileDescriptor(this, name, flags, (err, fd) => {
|
315 | if (err) return cb(err)
|
316 | cb(null, STDIO_CAP + (this._fds.push(fd) - 1) * 2)
|
317 | })
|
318 | })
|
319 | }
|
320 |
|
321 | read (fd, buf, offset, len, pos, cb) {
|
322 | if (typeof pos === 'function') {
|
323 | cb = pos
|
324 | pos = null
|
325 | }
|
326 |
|
327 | const desc = this._fds[(fd - STDIO_CAP) / 2]
|
328 | if (!desc) return process.nextTick(cb, new errors.BadFileDescriptor(`Bad file descriptor: ${fd}`))
|
329 | if (pos == null) pos = desc.position
|
330 | desc.read(buf, offset, len, pos, cb)
|
331 | }
|
332 |
|
333 | write (fd, buf, offset, len, pos, cb) {
|
334 | if (typeof pos === 'function') {
|
335 | cb = pos
|
336 | pos = null
|
337 | }
|
338 |
|
339 | const desc = this._fds[(fd - STDIO_CAP) / 2]
|
340 | if (!desc) return process.nextTick(cb, new errors.BadFileDescriptor(`Bad file descriptor: ${fd}`))
|
341 | if (pos == null) pos = desc.position
|
342 | desc.write(buf, offset, len, pos, cb)
|
343 | }
|
344 |
|
345 | createReadStream (name, opts) {
|
346 | if (!opts) opts = {}
|
347 | const self = this
|
348 |
|
349 | name = fixName(name)
|
350 |
|
351 | const length = typeof opts.end === 'number' ? 1 + opts.end - (opts.start || 0) : typeof opts.length === 'number' ? opts.length : -1
|
352 | const stream = coreByteStream({
|
353 | ...opts,
|
354 | highWaterMark: opts.highWaterMark || 64 * 1024
|
355 | })
|
356 |
|
357 | this.ready(err => {
|
358 | if (err) return stream.destroy(err)
|
359 | return this.stat(name, { file: true }, (err, st, trie) => {
|
360 | if (err) return stream.destroy(err)
|
361 | return this._getContent(trie.feed, (err, contentState) => {
|
362 | if (err) return stream.destroy(err)
|
363 | return oncontent(st, contentState)
|
364 | })
|
365 | })
|
366 | })
|
367 |
|
368 | function oncontent (st, contentState) {
|
369 | if (st.mount && st.mount.hypercore) {
|
370 | var byteOffset = 0
|
371 | var blockOffset = 0
|
372 | var blockLength = st.blocks
|
373 | var feed = self.corestore.get({
|
374 | key: st.mount.key,
|
375 | sparse: self.sparse
|
376 | })
|
377 | feed.once('ready', () => self.emit('content-feed', feed))
|
378 | } else {
|
379 | blockOffset = st.offset
|
380 | blockLength = st.blocks
|
381 | byteOffset = opts.start ? st.byteOffset + opts.start : (length === -1 ? -1 : st.byteOffset)
|
382 | feed = contentState.feed
|
383 | }
|
384 |
|
385 | const byteLength = length
|
386 |
|
387 | stream.start({
|
388 | feed,
|
389 | blockOffset,
|
390 | blockLength,
|
391 | byteOffset,
|
392 | byteLength
|
393 | })
|
394 | }
|
395 |
|
396 | return stream
|
397 | }
|
398 |
|
399 | createDiffStream (other, prefix, opts) {
|
400 | if (other instanceof Hyperdrive) other = other.version
|
401 | if (typeof prefix === 'object') return this.createDiffStream(other, '/', prefix)
|
402 | prefix = prefix || '/'
|
403 |
|
404 | const diffStream = this.db.createDiffStream(other, prefix, opts)
|
405 | return pumpify.obj(
|
406 | diffStream,
|
407 | through.obj((chunk, enc, cb) => {
|
408 | const entry = { type: chunk.type, name: chunk.key }
|
409 | if (chunk.left) entry.seq = chunk.left.seq
|
410 | if (chunk.right) entry.previous = { seq: chunk.right.seq }
|
411 | if (chunk.left && entry.type !== 'mount' && entry.type !== 'unmount') {
|
412 | try {
|
413 | entry.value = Stat.decode(chunk.left.value)
|
414 | } catch (err) {
|
415 | return cb(err)
|
416 | }
|
417 | } else if (chunk.left) {
|
418 | entry.value = chunk.left.info
|
419 | }
|
420 | return cb(null, entry)
|
421 | })
|
422 | )
|
423 | }
|
424 |
|
425 | createDirectoryStream (name, opts) {
|
426 | if (!opts) opts = {}
|
427 | name = fixName(name)
|
428 | return createStatStream(this, name, opts)
|
429 | }
|
430 |
|
431 | createWriteStream (name, opts) {
|
432 | if (!opts) opts = {}
|
433 | name = fixName(name)
|
434 |
|
435 | const self = this
|
436 | var release
|
437 |
|
438 | const proxy = duplexify()
|
439 | proxy.setReadable(false)
|
440 |
|
441 |
|
442 |
|
443 | this.ready(err => {
|
444 | if (err) return proxy.destroy(err)
|
445 | this.stat(name, { trie: true }, (err, stat, trie) => {
|
446 | if (err && (err.errno !== 2)) return proxy.destroy(err)
|
447 |
|
448 | this._getContent(trie.feed, (err, contentState) => {
|
449 | if (err) return proxy.destroy(err)
|
450 | if (opts.wait === false && contentState.isLocked()) return cb(new Error('Content is locked.'))
|
451 | contentState.lock(_release => {
|
452 | release = _release
|
453 | append(contentState)
|
454 | })
|
455 | })
|
456 | })
|
457 | })
|
458 |
|
459 | return proxy
|
460 |
|
461 | function append (contentState) {
|
462 | if (proxy.destroyed) return release()
|
463 |
|
464 | const byteOffset = contentState.feed.byteLength
|
465 | const offset = contentState.feed.length
|
466 |
|
467 | self.emit('appending', name, opts)
|
468 |
|
469 |
|
470 | const stream = contentState.feed.createWriteStream()
|
471 |
|
472 | proxy.on('close', ondone)
|
473 | proxy.on('finish', ondone)
|
474 |
|
475 | proxy.setWritable(stream)
|
476 | proxy.on('prefinish', function () {
|
477 | const stat = Stat.file({
|
478 | ...opts,
|
479 | offset,
|
480 | byteOffset,
|
481 | size: contentState.feed.byteLength - byteOffset,
|
482 | blocks: contentState.feed.length - offset
|
483 | })
|
484 | proxy.cork()
|
485 | self._putStat(name, stat, function (err) {
|
486 | if (err) return proxy.destroy(err)
|
487 | self.emit('append', name, opts)
|
488 | proxy.uncork()
|
489 | })
|
490 | })
|
491 | }
|
492 |
|
493 | function ondone () {
|
494 | proxy.removeListener('close', ondone)
|
495 | proxy.removeListener('finish', ondone)
|
496 | release()
|
497 | }
|
498 | }
|
499 |
|
500 | create (name, opts, cb) {
|
501 | if (typeof opts === 'function') return this.create(name, null, opts)
|
502 |
|
503 | name = fixName(name)
|
504 |
|
505 | this.ready(err => {
|
506 | if (err) return cb(err)
|
507 | this.lstat(name, { file: true, trie: true }, (err, stat) => {
|
508 | if (err && err.errno !== 2) return cb(err)
|
509 | if (stat) return cb(null, stat)
|
510 | const st = Stat.file(opts)
|
511 | return this._putStat(name, st, cb)
|
512 | })
|
513 | })
|
514 | }
|
515 |
|
516 | readFile (name, opts, cb) {
|
517 | if (typeof opts === 'function') return this.readFile(name, null, opts)
|
518 | if (typeof opts === 'string') opts = { encoding: opts }
|
519 | if (!opts) opts = {}
|
520 |
|
521 | name = fixName(name)
|
522 |
|
523 | collect(this.createReadStream(name, opts), function (err, bufs) {
|
524 | if (err) return cb(err)
|
525 | let buf = bufs.length === 1 ? bufs[0] : Buffer.concat(bufs)
|
526 | cb(null, opts.encoding && opts.encoding !== 'binary' ? buf.toString(opts.encoding) : buf)
|
527 | })
|
528 | }
|
529 |
|
530 | writeFile (name, buf, opts, cb) {
|
531 | if (typeof opts === 'function') return this.writeFile(name, buf, null, opts)
|
532 | if (typeof opts === 'string') opts = { encoding: opts }
|
533 | if (!opts) opts = {}
|
534 | if (typeof buf === 'string') buf = Buffer.from(buf, opts.encoding || 'utf-8')
|
535 | if (!cb) cb = noop
|
536 |
|
537 | name = fixName(name)
|
538 |
|
539 | let stream = this.createWriteStream(name, opts)
|
540 |
|
541 |
|
542 | var errored = false
|
543 |
|
544 | stream.on('error', err => {
|
545 | errored = true
|
546 | return cb(err)
|
547 | })
|
548 | stream.on('finish', () => {
|
549 | if (!errored) return cb(null)
|
550 | })
|
551 | stream.end(buf)
|
552 | }
|
553 |
|
554 | truncate (name, size, cb) {
|
555 | name = fixName(name)
|
556 |
|
557 | this.lstat(name, { file: true, trie: true }, (err, st) => {
|
558 | if (err && err.errno !== 2) return cb(err)
|
559 | if (!st || !size) return this.create(name, cb)
|
560 | if (size === st.size) return cb(null)
|
561 | if (size < st.size) {
|
562 | const readStream = this.createReadStream(name, { length: size })
|
563 | const writeStream = this.createWriteStream(name)
|
564 | return pump(readStream, writeStream, cb)
|
565 | } else {
|
566 | this.open(name, 'a', (err, fd) => {
|
567 | if (err) return cb(err)
|
568 | const length = size - st.size
|
569 | this.write(fd, Buffer.alloc(length), 0, length, st.size, err => {
|
570 | if (err) return cb(err)
|
571 | this.close(fd, cb)
|
572 | })
|
573 | })
|
574 | }
|
575 | })
|
576 | }
|
577 |
|
578 | ftruncate (fd, size, cb) {
|
579 | const desc = this._fds[(fd - STDIO_CAP) / 2]
|
580 | if (!desc) return process.nextTick(cb, new errors.BadFileDescriptor(`Bad file descriptor: ${fd}`))
|
581 | return desc.truncate(size, cb)
|
582 | }
|
583 |
|
584 | _createStat (name, opts, cb) {
|
585 | const self = this
|
586 |
|
587 | const statConstructor = (opts && opts.directory) ? Stat.directory : Stat.file
|
588 | const shouldForce = !!opts.force
|
589 |
|
590 | this.ready(err => {
|
591 | if (err) return cb(err)
|
592 | this.db.get(name, (err, node, trie) => {
|
593 | if (err) return cb(err)
|
594 | if (node && !shouldForce) return cb(new errors.PathAlreadyExists(name))
|
595 | onexisting(node, trie)
|
596 | })
|
597 | })
|
598 |
|
599 | function onexisting (node, trie) {
|
600 | self.ready(err => {
|
601 | if (err) return cb(err)
|
602 | self._getContent(trie.feed, (err, contentState) => {
|
603 | if (err) return cb(err)
|
604 | const st = statConstructor({
|
605 | ...opts,
|
606 | offset: contentState.feed.length,
|
607 | byteOffset: contentState.feed.byteLength
|
608 | })
|
609 | return cb(null, st)
|
610 | })
|
611 | })
|
612 | }
|
613 | }
|
614 |
|
615 | mkdir (name, opts, cb) {
|
616 | if (typeof opts === 'function') return this.mkdir(name, null, opts)
|
617 | if (typeof opts === 'number') opts = { mode: opts }
|
618 | if (!opts) opts = {}
|
619 | if (!cb) cb = noop
|
620 |
|
621 | name = fixName(name)
|
622 | opts.directory = true
|
623 |
|
624 | this._createStat(name, opts, (err, st) => {
|
625 | if (err) return cb(err)
|
626 | this._putStat(name, st, {
|
627 | condition: ifNotExists
|
628 | }, cb)
|
629 | })
|
630 | }
|
631 |
|
632 | _statDirectory (name, opts, cb) {
|
633 | const ite = this.db.iterator(name)
|
634 | ite.next((err, st) => {
|
635 | if (err) return cb(err)
|
636 | if (name !== '/' && !st) return cb(new errors.FileNotFound(name))
|
637 | if (name === '/') return cb(null, Stat.directory(), this.db)
|
638 | const trie = st[MountableHypertrie.Symbols.TRIE]
|
639 | const mount = st[MountableHypertrie.Symbols.MOUNT]
|
640 | const innerPath = st[MountableHypertrie.Symbols.INNER_PATH]
|
641 | try {
|
642 | st = Stat.decode(st.value)
|
643 | } catch (err) {
|
644 | return cb(err)
|
645 | }
|
646 | const noMode = Object.assign({}, st, { mode: 0 })
|
647 | return cb(null, Stat.directory(noMode), trie, mount, innerPath)
|
648 | })
|
649 | }
|
650 |
|
651 | readlink (name, cb) {
|
652 | this.lstat(name, function (err, st) {
|
653 | if (err) return cb(err)
|
654 | cb(null, st.linkname)
|
655 | })
|
656 | }
|
657 |
|
658 | lstat (name, opts, cb) {
|
659 | if (typeof opts === 'function') return this.lstat(name, null, opts)
|
660 | if (!opts) opts = {}
|
661 | const self = this
|
662 | name = fixName(name)
|
663 |
|
664 | this.ready(err => {
|
665 | if (err) return cb(err)
|
666 | this.db.get(name, opts, onstat)
|
667 | })
|
668 |
|
669 | function onstat (err, node, trie, mount, mountPath) {
|
670 | if (err) return cb(err)
|
671 | if (!node && opts.trie) return cb(null, null, trie, mount, mountPath)
|
672 | if (!node && opts.file) return cb(new errors.FileNotFound(name))
|
673 | if (!node) return self._statDirectory(name, opts, cb)
|
674 | try {
|
675 | var st = Stat.decode(node.value)
|
676 | } catch (err) {
|
677 | return cb(err)
|
678 | }
|
679 | const writingFd = self._writingFds.get(name)
|
680 | if (writingFd) {
|
681 | st.size = writingFd.stat.size
|
682 | }
|
683 | cb(null, st, trie, mount, mountPath)
|
684 | }
|
685 | }
|
686 |
|
687 | stat (name, opts, cb) {
|
688 | if (typeof opts === 'function') return this.stat(name, null, opts)
|
689 | if (!opts) opts = {}
|
690 |
|
691 | this.lstat(name, opts, (err, stat, trie, mount, mountPath) => {
|
692 | if (err) return cb(err)
|
693 | if (!stat) return cb(null, null, trie, name, mount, mountPath)
|
694 | if (stat.linkname) {
|
695 | if (path.isAbsolute(stat.linkname)) return this.stat(stat.linkname, opts, cb)
|
696 | const relativeStat = path.resolve('/', path.dirname(name), stat.linkname)
|
697 | return this.stat(relativeStat, opts, cb)
|
698 | }
|
699 | return cb(null, stat, trie, name, mount, mountPath)
|
700 | })
|
701 | }
|
702 |
|
703 | access (name, opts, cb) {
|
704 | if (typeof opts === 'function') return this.access(name, null, opts)
|
705 | if (!opts) opts = {}
|
706 | name = fixName(name)
|
707 |
|
708 | this.stat(name, opts, err => {
|
709 | cb(err)
|
710 | })
|
711 | }
|
712 |
|
713 | exists (name, opts, cb) {
|
714 | if (typeof opts === 'function') return this.exists(name, null, opts)
|
715 | if (!opts) opts = {}
|
716 |
|
717 | this.access(name, opts, err => {
|
718 | cb(!err)
|
719 | })
|
720 | }
|
721 |
|
722 | readdir (name, opts, cb) {
|
723 | if (typeof opts === 'function') return this.readdir(name, null, opts)
|
724 | name = fixName(name)
|
725 |
|
726 | const readdirStream = createReaddirStream(this, name, opts)
|
727 | return collect(readdirStream, (err, entries) => {
|
728 | if (err) return cb(err)
|
729 | return cb(null, entries)
|
730 | })
|
731 | }
|
732 |
|
733 | _del (name, cb) {
|
734 | this.ready(err => {
|
735 | if (err) return cb(err)
|
736 | this.db.del(name, (err, node) => {
|
737 | if (err) return cb(err)
|
738 | if (!node) return cb(new errors.FileNotFound(name))
|
739 | return cb(null)
|
740 | })
|
741 | })
|
742 | }
|
743 |
|
744 | unlink (name, cb) {
|
745 | name = fixName(name)
|
746 | this._del(name, cb || noop)
|
747 | }
|
748 |
|
749 | rmdir (name, cb) {
|
750 | if (!cb) cb = noop
|
751 | name = fixName(name)
|
752 | const self = this
|
753 |
|
754 | const ite = readdirIterator(this, name)
|
755 | ite.next((err, val) => {
|
756 | if (err) return cb(err)
|
757 | if (val) return cb(new errors.DirectoryNotEmpty(name))
|
758 | self._del(name, cb)
|
759 | })
|
760 | }
|
761 |
|
762 | replicate (isInitiator, opts) {
|
763 |
|
764 | if (typeof isInitiator === 'object' && isInitiator && !opts) {
|
765 | opts = isInitiator
|
766 | isInitiator = !!opts.initiator
|
767 | }
|
768 | const stream = (opts && opts.stream) || new HypercoreProtocol(isInitiator, { ...opts })
|
769 | this.ready(err => {
|
770 | if (err) return stream.destroy(err)
|
771 | this.corestore.replicate(isInitiator, { ...opts, stream })
|
772 | })
|
773 | return stream
|
774 | }
|
775 |
|
776 | checkout (version, opts) {
|
777 | opts = {
|
778 | ...opts,
|
779 | _db: this.db.checkout(version),
|
780 | _contentStates: this._contentStates,
|
781 | }
|
782 | return new Hyperdrive(this.corestore, this.key, opts)
|
783 | }
|
784 |
|
785 | _closeFile (fd, cb) {
|
786 | const idx = (fd - STDIO_CAP) / 2
|
787 | const desc = this._fds[idx]
|
788 | if (!desc) return process.nextTick(cb, new Error('Invalid file descriptor'))
|
789 | this._fds[idx] = null
|
790 | while (this._fds.length && !this._fds[this._fds.length - 1]) this._fds.pop()
|
791 | desc.close(cb)
|
792 | }
|
793 |
|
794 | _close (cb) {
|
795 | this.corestore.close((err) => {
|
796 | this.emit('close')
|
797 | cb(err)
|
798 | })
|
799 | }
|
800 |
|
801 | close (fd, cb) {
|
802 | if (typeof fd === 'number') return this._closeFile(fd, cb || noop)
|
803 | super.close(false, fd)
|
804 | }
|
805 |
|
806 | stats (path, opts, cb) {
|
807 | if (typeof opts === 'function') return this.stats(path, null, opts)
|
808 | const self = this
|
809 | const stats = new Map()
|
810 |
|
811 | this.stat(path, (err, stat, trie) => {
|
812 | if (err) return cb(err)
|
813 | if (stat.isFile()) {
|
814 | return fileStats(path, cb)
|
815 | } else {
|
816 | const recursive = opts && (opts.recursive !== false)
|
817 | const ite = statIterator(self, path, { recursive })
|
818 | return ite.next(function loop (err, info) {
|
819 | if (err) return cb(err)
|
820 | if (!info) return cb(null, stats)
|
821 | fileStats(info.path, (err, fileStats) => {
|
822 | if (err && err.errno !== 2) return cb(err)
|
823 | if (!fileStats) return ite.next(loop)
|
824 | stats.set(info.path, fileStats)
|
825 | return ite.next(loop)
|
826 | })
|
827 | })
|
828 | }
|
829 | })
|
830 |
|
831 | function onstats (err, path, fileStats) {
|
832 | if (err) return cb(err)
|
833 | stats.set(path, fileStats)
|
834 | }
|
835 |
|
836 | function fileStats (path, cb) {
|
837 | const total = emptyStats()
|
838 | return self.stat(path, (err, stat, trie) => {
|
839 | if (err) return cb(err)
|
840 | return self._getContent(trie.feed, (err, contentState) => {
|
841 | if (err) return cb(err)
|
842 | const downloadedBlocks = contentState.feed.downloaded(stat.offset, stat.offset + stat.blocks)
|
843 | total.blocks = stat.blocks
|
844 | total.size = stat.size
|
845 | total.downloadedBlocks = downloadedBlocks
|
846 |
|
847 |
|
848 | return cb(null, total)
|
849 | })
|
850 | })
|
851 | }
|
852 |
|
853 | function emptyStats () {
|
854 | return {
|
855 | blocks: 0,
|
856 | size: 0,
|
857 | downloadedBlocks: 0,
|
858 | }
|
859 | }
|
860 | }
|
861 |
|
862 | watchStats (path, opts) {
|
863 | const self = this
|
864 | var timer = setInterval(collectStats, (opts && opts.statsInveral) || 2000)
|
865 | var collecting = false
|
866 | var destroyed = false
|
867 |
|
868 | const handle = new EventEmitter()
|
869 | Object.assign(handle, {
|
870 | destroy
|
871 | })
|
872 | return handle
|
873 |
|
874 | function collectStats () {
|
875 | if (collecting) return
|
876 | collecting = true
|
877 | self.stats(path, opts, (err, stats) => {
|
878 | if (err) return destroy(err)
|
879 | collecting = false
|
880 | handle.stats = stats
|
881 | handle.emit('update')
|
882 | })
|
883 | }
|
884 |
|
885 | function destroy (err) {
|
886 | handle.emit('destroy', err)
|
887 | clearInterval(timer)
|
888 | destroyed = true
|
889 | }
|
890 | }
|
891 |
|
892 | download (path, opts, cb) {
|
893 | if (typeof opts === 'function') {
|
894 | cb = opts
|
895 | opts = null
|
896 | }
|
897 | opts = opts || {}
|
898 | const self = this
|
899 | const ranges = new Map()
|
900 | var pending = 0
|
901 | var destroyed = false
|
902 |
|
903 | const handle = new EventEmitter()
|
904 | Object.assign(handle, {
|
905 | destroy
|
906 | })
|
907 |
|
908 | self.stat(path, (err, stat, trie) => {
|
909 | if (err) return destroy(err)
|
910 | if (stat.isFile()) {
|
911 | downloadFile(path, stat, trie, destroy)
|
912 | } else {
|
913 | const recursive = opts.recursive !== false
|
914 | const noMounts = opts.noMounts !== false
|
915 | const ite = statIterator(self, path, { recursive, noMounts, random: true })
|
916 | downloadNext(ite)
|
917 | }
|
918 | })
|
919 |
|
920 | return handle
|
921 |
|
922 | function downloadNext (ite) {
|
923 | if (destroyed) return
|
924 | ite.next((err, info) => {
|
925 | if (err) return destroy(err)
|
926 | if (!info) {
|
927 | if (!ranges.size) return destroy(null)
|
928 | else return
|
929 | }
|
930 | const { path, stat, trie } = info
|
931 | if (!stat.blocks || stat.mount || stat.isDirectory()) return downloadNext(ite)
|
932 | downloadFile(path, stat, trie, err => {
|
933 | if (err) return destroy(err)
|
934 | return downloadNext(ite)
|
935 | })
|
936 | if (pending < ((opts && opts.maxConcurrent) || 50)) {
|
937 | return downloadNext(ite)
|
938 | }
|
939 | })
|
940 | }
|
941 |
|
942 | function downloadFile (path, stat, trie, cb) {
|
943 | pending++
|
944 | self._getContent(trie.feed, (err, contentState) => {
|
945 | if (err) return destroy(err)
|
946 | const feed = contentState.feed
|
947 | const range = feed.download({
|
948 | start: stat.offset,
|
949 | end: stat.offset + stat.blocks
|
950 | }, err => {
|
951 | pending--
|
952 | if (err) return cb(err)
|
953 | ranges.delete(path)
|
954 | return cb(null)
|
955 | })
|
956 | ranges.set(path, { range, feed })
|
957 | })
|
958 | }
|
959 |
|
960 | function destroy (err) {
|
961 | if (destroyed) return null
|
962 | destroyed = true
|
963 | for (const [path, { feed, range }] of ranges) {
|
964 | feed.undownload(range)
|
965 | }
|
966 | if (err) {
|
967 | handle.emit('error', err)
|
968 | if (cb) return cb(err)
|
969 | } else {
|
970 | handle.emit('finish')
|
971 | if (cb) return cb(null)
|
972 | }
|
973 | }
|
974 | }
|
975 |
|
976 | watch (name, onchange) {
|
977 | name = fixName(name)
|
978 | return this.db.watch(name, onchange)
|
979 | }
|
980 |
|
981 | mount (path, key, opts, cb) {
|
982 | if (typeof opts === 'function') return this.mount(path, key, null, opts)
|
983 | const self = this
|
984 |
|
985 | path = fixName(path)
|
986 | opts = opts || {}
|
987 |
|
988 | const statOpts = {
|
989 | uid: opts.uid,
|
990 | gid: opts.gid
|
991 | }
|
992 | statOpts.mount = {
|
993 | key,
|
994 | version: opts.version,
|
995 | hash: opts.hash,
|
996 | hypercore: !!opts.hypercore
|
997 | }
|
998 | statOpts.directory = !opts.hypercore
|
999 |
|
1000 | if (opts.hypercore) {
|
1001 | const core = this.corestore.get({
|
1002 | key,
|
1003 | ...opts,
|
1004 | parents: [this.key],
|
1005 | sparse: this.sparse
|
1006 | })
|
1007 | core.ready(err => {
|
1008 | if (err) return cb(err)
|
1009 | this.emit('content-feed', core)
|
1010 | statOpts.size = core.byteLength
|
1011 | statOpts.blocks = core.length
|
1012 | return mountCore()
|
1013 | })
|
1014 | } else {
|
1015 | return process.nextTick(mountTrie, null)
|
1016 | }
|
1017 |
|
1018 | function mountCore () {
|
1019 | self._createStat(path, statOpts, (err, st) => {
|
1020 | if (err) return cb(err)
|
1021 | return self.db.put(path, st.encode(), cb)
|
1022 | })
|
1023 | }
|
1024 |
|
1025 | function mountTrie () {
|
1026 | self._createStat(path, statOpts, (err, st) => {
|
1027 | if (err) return cb(err)
|
1028 | self.db.mount(path, key, { ...opts, value: st.encode() }, err => {
|
1029 | return self.db.loadMount(path, cb)
|
1030 | })
|
1031 | })
|
1032 | }
|
1033 | }
|
1034 |
|
1035 | unmount (path, cb) {
|
1036 | this.stat(path, (err, st) => {
|
1037 | if (err) return cb(err)
|
1038 | if (!st.mount) return cb(new Error('Can only unmount mounts.'))
|
1039 | if (st.mount.hypercore) {
|
1040 | return this.unlink(path, cb)
|
1041 | } else {
|
1042 | return this.db.unmount(path, cb)
|
1043 | }
|
1044 | })
|
1045 | }
|
1046 |
|
1047 | symlink (target, linkName, cb) {
|
1048 | target = unixify(target)
|
1049 | linkName = fixName(linkName)
|
1050 |
|
1051 | this.lstat(linkName, (err, stat) => {
|
1052 | if (err && (err.errno !== 2)) return cb(err)
|
1053 | if (!err) return cb(new errors.PathAlreadyExists(linkName))
|
1054 | const st = Stat.symlink({
|
1055 | linkname: target
|
1056 | })
|
1057 | return this._putStat(linkName, st, cb)
|
1058 | })
|
1059 | }
|
1060 |
|
1061 | createMountStream (opts) {
|
1062 | return createMountStream(this, opts)
|
1063 | }
|
1064 |
|
1065 | getAllMounts (opts, cb) {
|
1066 | if (typeof opts === 'function') return this.getAllMounts(null, opts)
|
1067 | const mounts = new Map()
|
1068 |
|
1069 | this.ready(err => {
|
1070 | if (err) return cb(err)
|
1071 | collect(this.createMountStream(opts), (err, mountList) => {
|
1072 | if (err) return cb(err)
|
1073 | for (const { path, metadata, content } of mountList) {
|
1074 | mounts.set(path, { metadata, content })
|
1075 | }
|
1076 | return cb(null, mounts)
|
1077 | })
|
1078 | })
|
1079 | }
|
1080 |
|
1081 | extension (name, message) {
|
1082 | this.metadata.extension(name, message)
|
1083 | }
|
1084 |
|
1085 | get peers () {
|
1086 | return this.metadata.peers
|
1087 | }
|
1088 |
|
1089 | setMetadata (path, key, value, cb) {
|
1090 | const metadata = {}
|
1091 | metadata[key] = value
|
1092 | this._update(path, { metadata }, cb)
|
1093 | }
|
1094 |
|
1095 | removeMetadata (path, key, cb) {
|
1096 | const metadata = {}
|
1097 | metadata[key] = null
|
1098 | this._update(path, { metadata }, cb)
|
1099 | }
|
1100 |
|
1101 | copy (from, to, cb) {
|
1102 | this.stat(from, (err, stat) => {
|
1103 | if (err) return cb(err)
|
1104 | this.create(to, stat, cb)
|
1105 | })
|
1106 | }
|
1107 |
|
1108 |
|
1109 |
|
1110 | createTag (name, version, cb) {
|
1111 | return this.tags.create(name, version, cb)
|
1112 | }
|
1113 |
|
1114 | getAllTags (cb) {
|
1115 | return this.tags.getAll(cb)
|
1116 | }
|
1117 |
|
1118 | deleteTag (name, cb) {
|
1119 | return this.tags.delete(name, cb)
|
1120 | }
|
1121 |
|
1122 | getTaggedVersion (name, cb) {
|
1123 | return this.tags.get(name, cb)
|
1124 | }
|
1125 | }
|
1126 |
|
1127 | function isObject (val) {
|
1128 | return !!val && typeof val !== 'string' && !Buffer.isBuffer(val)
|
1129 | }
|
1130 |
|
1131 | function ifNotExists (oldNode, newNode, cb) {
|
1132 | if (oldNode) return cb(new errors.PathAlreadyExists(oldNode.key))
|
1133 | return cb(null, true)
|
1134 | }
|
1135 |
|
1136 | function fixName (name) {
|
1137 | name = unixify(name)
|
1138 | if (!name.startsWith('/')) name = '/' + name
|
1139 | return name
|
1140 | }
|
1141 |
|
1142 | function noop () {}
|