Server IP : 85.214.239.14 / Your IP : 18.220.194.29 Web Server : Apache/2.4.62 (Debian) System : Linux h2886529.stratoserver.net 4.9.0 #1 SMP Tue Jan 9 19:45:01 MSK 2024 x86_64 User : www-data ( 33) PHP Version : 7.4.18 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, MySQL : OFF | cURL : OFF | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : OFF Directory : /lib/node_modules/npm/node_modules/tar/lib/ |
Upload File : |
'use strict' // this[BUFFER] is the remainder of a chunk if we're waiting for // the full 512 bytes of a header to come in. We will Buffer.concat() // it to the next write(), which is a mem copy, but a small one. // // this[QUEUE] is a Yallist of entries that haven't been emitted // yet this can only get filled up if the user keeps write()ing after // a write() returns false, or does a write() with more than one entry // // We don't buffer chunks, we always parse them and either create an // entry, or push it into the active entry. The ReadEntry class knows // to throw data away if .ignore=true // // Shift entry off the buffer when it emits 'end', and emit 'entry' for // the next one in the list. // // At any time, we're pushing body chunks into the entry at WRITEENTRY, // and waiting for 'end' on the entry at READENTRY // // ignored entries get .resume() called on them straight away const warner = require('./warn-mixin.js') const Header = require('./header.js') const EE = require('events') const Yallist = require('yallist') const maxMetaEntrySize = 1024 * 1024 const Entry = require('./read-entry.js') const Pax = require('./pax.js') const zlib = require('minizlib') const { nextTick } = require('process') const gzipHeader = Buffer.from([0x1f, 0x8b]) const STATE = Symbol('state') const WRITEENTRY = Symbol('writeEntry') const READENTRY = Symbol('readEntry') const NEXTENTRY = Symbol('nextEntry') const PROCESSENTRY = Symbol('processEntry') const EX = Symbol('extendedHeader') const GEX = Symbol('globalExtendedHeader') const META = Symbol('meta') const EMITMETA = Symbol('emitMeta') const BUFFER = Symbol('buffer') const QUEUE = Symbol('queue') const ENDED = Symbol('ended') const EMITTEDEND = Symbol('emittedEnd') const EMIT = Symbol('emit') const UNZIP = Symbol('unzip') const CONSUMECHUNK = Symbol('consumeChunk') const CONSUMECHUNKSUB = Symbol('consumeChunkSub') const CONSUMEBODY = Symbol('consumeBody') const CONSUMEMETA = Symbol('consumeMeta') const CONSUMEHEADER = Symbol('consumeHeader') const CONSUMING = Symbol('consuming') const BUFFERCONCAT = Symbol('bufferConcat') const MAYBEEND = Symbol('maybeEnd') const WRITING = Symbol('writing') const ABORTED = Symbol('aborted') const DONE = Symbol('onDone') const SAW_VALID_ENTRY = Symbol('sawValidEntry') const SAW_NULL_BLOCK = Symbol('sawNullBlock') const SAW_EOF = Symbol('sawEOF') const CLOSESTREAM = Symbol('closeStream') const noop = _ => true module.exports = warner(class Parser extends EE { constructor (opt) { opt = opt || {} super(opt) this.file = opt.file || '' // set to boolean false when an entry starts. 1024 bytes of \0 // is technically a valid tarball, albeit a boring one. this[SAW_VALID_ENTRY] = null // these BADARCHIVE errors can't be detected early. listen on DONE. this.on(DONE, _ => { if (this[STATE] === 'begin' || this[SAW_VALID_ENTRY] === false) { // either less than 1 block of data, or all entries were invalid. // Either way, probably not even a tarball. this.warn('TAR_BAD_ARCHIVE', 'Unrecognized archive format') } }) if (opt.ondone) { this.on(DONE, opt.ondone) } else { this.on(DONE, _ => { this.emit('prefinish') this.emit('finish') this.emit('end') }) } this.strict = !!opt.strict this.maxMetaEntrySize = opt.maxMetaEntrySize || maxMetaEntrySize this.filter = typeof opt.filter === 'function' ? opt.filter : noop // Unlike gzip, brotli doesn't have any magic bytes to identify it // Users need to explicitly tell us they're extracting a brotli file // Or we infer from the file extension const isTBR = (opt.file && ( opt.file.endsWith('.tar.br') || opt.file.endsWith('.tbr'))) // if it's a tbr file it MIGHT be brotli, but we don't know until // we look at it and verify it's not a valid tar file. this.brotli = !opt.gzip && opt.brotli !== undefined ? opt.brotli : isTBR ? undefined : false // have to set this so that streams are ok piping into it this.writable = true this.readable = false this[QUEUE] = new Yallist() this[BUFFER] = null this[READENTRY] = null this[WRITEENTRY] = null this[STATE] = 'begin' this[META] = '' this[EX] = null this[GEX] = null this[ENDED] = false this[UNZIP] = null this[ABORTED] = false this[SAW_NULL_BLOCK] = false this[SAW_EOF] = false this.on('end', () => this[CLOSESTREAM]()) if (typeof opt.onwarn === 'function') { this.on('warn', opt.onwarn) } if (typeof opt.onentry === 'function') { this.on('entry', opt.onentry) } } [CONSUMEHEADER] (chunk, position) { if (this[SAW_VALID_ENTRY] === null) { this[SAW_VALID_ENTRY] = false } let header try { header = new Header(chunk, position, this[EX], this[GEX]) } catch (er) { return this.warn('TAR_ENTRY_INVALID', er) } if (header.nullBlock) { if (this[SAW_NULL_BLOCK]) { this[SAW_EOF] = true // ending an archive with no entries. pointless, but legal. if (this[STATE] === 'begin') { this[STATE] = 'header' } this[EMIT]('eof') } else { this[SAW_NULL_BLOCK] = true this[EMIT]('nullBlock') } } else { this[SAW_NULL_BLOCK] = false if (!header.cksumValid) { this.warn('TAR_ENTRY_INVALID', 'checksum failure', { header }) } else if (!header.path) { this.warn('TAR_ENTRY_INVALID', 'path is required', { header }) } else { const type = header.type if (/^(Symbolic)?Link$/.test(type) && !header.linkpath) { this.warn('TAR_ENTRY_INVALID', 'linkpath required', { header }) } else if (!/^(Symbolic)?Link$/.test(type) && header.linkpath) { this.warn('TAR_ENTRY_INVALID', 'linkpath forbidden', { header }) } else { const entry = this[WRITEENTRY] = new Entry(header, this[EX], this[GEX]) // we do this for meta & ignored entries as well, because they // are still valid tar, or else we wouldn't know to ignore them if (!this[SAW_VALID_ENTRY]) { if (entry.remain) { // this might be the one! const onend = () => { if (!entry.invalid) { this[SAW_VALID_ENTRY] = true } } entry.on('end', onend) } else { this[SAW_VALID_ENTRY] = true } } if (entry.meta) { if (entry.size > this.maxMetaEntrySize) { entry.ignore = true this[EMIT]('ignoredEntry', entry) this[STATE] = 'ignore' entry.resume() } else if (entry.size > 0) { this[META] = '' entry.on('data', c => this[META] += c) this[STATE] = 'meta' } } else { this[EX] = null entry.ignore = entry.ignore || !this.filter(entry.path, entry) if (entry.ignore) { // probably valid, just not something we care about this[EMIT]('ignoredEntry', entry) this[STATE] = entry.remain ? 'ignore' : 'header' entry.resume() } else { if (entry.remain) { this[STATE] = 'body' } else { this[STATE] = 'header' entry.end() } if (!this[READENTRY]) { this[QUEUE].push(entry) this[NEXTENTRY]() } else { this[QUEUE].push(entry) } } } } } } } [CLOSESTREAM] () { nextTick(() => this.emit('close')) } [PROCESSENTRY] (entry) { let go = true if (!entry) { this[READENTRY] = null go = false } else if (Array.isArray(entry)) { this.emit.apply(this, entry) } else { this[READENTRY] = entry this.emit('entry', entry) if (!entry.emittedEnd) { entry.on('end', _ => this[NEXTENTRY]()) go = false } } return go } [NEXTENTRY] () { do {} while (this[PROCESSENTRY](this[QUEUE].shift())) if (!this[QUEUE].length) { // At this point, there's nothing in the queue, but we may have an // entry which is being consumed (readEntry). // If we don't, then we definitely can handle more data. // If we do, and either it's flowing, or it has never had any data // written to it, then it needs more. // The only other possibility is that it has returned false from a // write() call, so we wait for the next drain to continue. const re = this[READENTRY] const drainNow = !re || re.flowing || re.size === re.remain if (drainNow) { if (!this[WRITING]) { this.emit('drain') } } else { re.once('drain', _ => this.emit('drain')) } } } [CONSUMEBODY] (chunk, position) { // write up to but no more than writeEntry.blockRemain const entry = this[WRITEENTRY] const br = entry.blockRemain const c = (br >= chunk.length && position === 0) ? chunk : chunk.slice(position, position + br) entry.write(c) if (!entry.blockRemain) { this[STATE] = 'header' this[WRITEENTRY] = null entry.end() } return c.length } [CONSUMEMETA] (chunk, position) { const entry = this[WRITEENTRY] const ret = this[CONSUMEBODY](chunk, position) // if we finished, then the entry is reset if (!this[WRITEENTRY]) { this[EMITMETA](entry) } return ret } [EMIT] (ev, data, extra) { if (!this[QUEUE].length && !this[READENTRY]) { this.emit(ev, data, extra) } else { this[QUEUE].push([ev, data, extra]) } } [EMITMETA] (entry) { this[EMIT]('meta', this[META]) switch (entry.type) { case 'ExtendedHeader': case 'OldExtendedHeader': this[EX] = Pax.parse(this[META], this[EX], false) break case 'GlobalExtendedHeader': this[GEX] = Pax.parse(this[META], this[GEX], true) break case 'NextFileHasLongPath': case 'OldGnuLongPath': this[EX] = this[EX] || Object.create(null) this[EX].path = this[META].replace(/\0.*/, '') break case 'NextFileHasLongLinkpath': this[EX] = this[EX] || Object.create(null) this[EX].linkpath = this[META].replace(/\0.*/, '') break /* istanbul ignore next */ default: throw new Error('unknown meta: ' + entry.type) } } abort (error) { this[ABORTED] = true this.emit('abort', error) // always throws, even in non-strict mode this.warn('TAR_ABORT', error, { recoverable: false }) } write (chunk) { if (this[ABORTED]) { return } // first write, might be gzipped const needSniff = this[UNZIP] === null || this.brotli === undefined && this[UNZIP] === false if (needSniff && chunk) { if (this[BUFFER]) { chunk = Buffer.concat([this[BUFFER], chunk]) this[BUFFER] = null } if (chunk.length < gzipHeader.length) { this[BUFFER] = chunk return true } // look for gzip header for (let i = 0; this[UNZIP] === null && i < gzipHeader.length; i++) { if (chunk[i] !== gzipHeader[i]) { this[UNZIP] = false } } const maybeBrotli = this.brotli === undefined if (this[UNZIP] === false && maybeBrotli) { // read the first header to see if it's a valid tar file. If so, // we can safely assume that it's not actually brotli, despite the // .tbr or .tar.br file extension. // if we ended before getting a full chunk, yes, def brotli if (chunk.length < 512) { if (this[ENDED]) { this.brotli = true } else { this[BUFFER] = chunk return true } } else { // if it's tar, it's pretty reliably not brotli, chances of // that happening are astronomical. try { new Header(chunk.slice(0, 512)) this.brotli = false } catch (_) { this.brotli = true } } } if (this[UNZIP] === null || (this[UNZIP] === false && this.brotli)) { const ended = this[ENDED] this[ENDED] = false this[UNZIP] = this[UNZIP] === null ? new zlib.Unzip() : new zlib.BrotliDecompress() this[UNZIP].on('data', chunk => this[CONSUMECHUNK](chunk)) this[UNZIP].on('error', er => this.abort(er)) this[UNZIP].on('end', _ => { this[ENDED] = true this[CONSUMECHUNK]() }) this[WRITING] = true const ret = this[UNZIP][ended ? 'end' : 'write'](chunk) this[WRITING] = false return ret } } this[WRITING] = true if (this[UNZIP]) { this[UNZIP].write(chunk) } else { this[CONSUMECHUNK](chunk) } this[WRITING] = false // return false if there's a queue, or if the current entry isn't flowing const ret = this[QUEUE].length ? false : this[READENTRY] ? this[READENTRY].flowing : true // if we have no queue, then that means a clogged READENTRY if (!ret && !this[QUEUE].length) { this[READENTRY].once('drain', _ => this.emit('drain')) } return ret } [BUFFERCONCAT] (c) { if (c && !this[ABORTED]) { this[BUFFER] = this[BUFFER] ? Buffer.concat([this[BUFFER], c]) : c } } [MAYBEEND] () { if (this[ENDED] && !this[EMITTEDEND] && !this[ABORTED] && !this[CONSUMING]) { this[EMITTEDEND] = true const entry = this[WRITEENTRY] if (entry && entry.blockRemain) { // truncated, likely a damaged file const have = this[BUFFER] ? this[BUFFER].length : 0 this.warn('TAR_BAD_ARCHIVE', `Truncated input (needed ${ entry.blockRemain} more bytes, only ${have} available)`, { entry }) if (this[BUFFER]) { entry.write(this[BUFFER]) } entry.end() } this[EMIT](DONE) } } [CONSUMECHUNK] (chunk) { if (this[CONSUMING]) { this[BUFFERCONCAT](chunk) } else if (!chunk && !this[BUFFER]) { this[MAYBEEND]() } else { this[CONSUMING] = true if (this[BUFFER]) { this[BUFFERCONCAT](chunk) const c = this[BUFFER] this[BUFFER] = null this[CONSUMECHUNKSUB](c) } else { this[CONSUMECHUNKSUB](chunk) } while (this[BUFFER] && this[BUFFER].length >= 512 && !this[ABORTED] && !this[SAW_EOF]) { const c = this[BUFFER] this[BUFFER] = null this[CONSUMECHUNKSUB](c) } this[CONSUMING] = false } if (!this[BUFFER] || this[ENDED]) { this[MAYBEEND]() } } [CONSUMECHUNKSUB] (chunk) { // we know that we are in CONSUMING mode, so anything written goes into // the buffer. Advance the position and put any remainder in the buffer. let position = 0 const length = chunk.length while (position + 512 <= length && !this[ABORTED] && !this[SAW_EOF]) { switch (this[STATE]) { case 'begin': case 'header': this[CONSUMEHEADER](chunk, position) position += 512 break case 'ignore': case 'body': position += this[CONSUMEBODY](chunk, position) break case 'meta': position += this[CONSUMEMETA](chunk, position) break /* istanbul ignore next */ default: throw new Error('invalid state: ' + this[STATE]) } } if (position < length) { if (this[BUFFER]) { this[BUFFER] = Buffer.concat([chunk.slice(position), this[BUFFER]]) } else { this[BUFFER] = chunk.slice(position) } } } end (chunk) { if (!this[ABORTED]) { if (this[UNZIP]) { this[UNZIP].end(chunk) } else { this[ENDED] = true if (this.brotli === undefined) chunk = chunk || Buffer.alloc(0) this.write(chunk) } } } })