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package.json 0000644 00000002437 15170144044 0007040 0 ustar 00 {
"_id": "minizlib@2.1.2",
"_inBundle": true,
"_location": "/npm/minizlib",
"_phantomChildren": {
"yallist": "4.0.0"
},
"_requiredBy": [
"/npm/minipass-fetch",
"/npm/npm-registry-fetch",
"/npm/tar"
],
"author": {
"name": "Isaac Z. Schlueter",
"email": "i@izs.me",
"url": "http://blog.izs.me/"
},
"bugs": {
"url": "https://github.com/isaacs/minizlib/issues"
},
"dependencies": {
"minipass": "^3.0.0",
"yallist": "^4.0.0"
},
"description": "A small fast zlib stream built on [minipass](http://npm.im/minipass) and Node.js's zlib binding.",
"devDependencies": {
"tap": "^14.6.9"
},
"engines": {
"node": ">= 8"
},
"files": [
"index.js",
"constants.js"
],
"homepage": "https://github.com/isaacs/minizlib#readme",
"keywords": [
"zlib",
"gzip",
"gunzip",
"deflate",
"inflate",
"compression",
"zip",
"unzip"
],
"license": "MIT",
"main": "index.js",
"name": "minizlib",
"repository": {
"type": "git",
"url": "git+https://github.com/isaacs/minizlib.git"
},
"scripts": {
"postpublish": "git push origin --all; git push origin --tags",
"postversion": "npm publish",
"preversion": "npm test",
"test": "tap test/*.js --100 -J"
},
"version": "2.1.2"
}
node_modules/minipass/package.json 0000644 00000002761 15170144044 0013340 0 ustar 00 {
"_id": "minipass@3.3.6",
"_inBundle": true,
"_location": "/npm/minizlib/minipass",
"_phantomChildren": {},
"_requiredBy": [
"/npm/minizlib"
],
"author": {
"name": "Isaac Z. Schlueter",
"email": "i@izs.me",
"url": "http://blog.izs.me/"
},
"bugs": {
"url": "https://github.com/isaacs/minipass/issues"
},
"dependencies": {
"yallist": "^4.0.0"
},
"description": "minimal implementation of a PassThrough stream",
"devDependencies": {
"@types/node": "^17.0.41",
"end-of-stream": "^1.4.0",
"prettier": "^2.6.2",
"tap": "^16.2.0",
"through2": "^2.0.3",
"ts-node": "^10.8.1",
"typescript": "^4.7.3"
},
"engines": {
"node": ">=8"
},
"files": [
"index.d.ts",
"index.js"
],
"homepage": "https://github.com/isaacs/minipass#readme",
"keywords": [
"passthrough",
"stream"
],
"license": "ISC",
"main": "index.js",
"name": "minipass",
"prettier": {
"semi": false,
"printWidth": 80,
"tabWidth": 2,
"useTabs": false,
"singleQuote": true,
"jsxSingleQuote": false,
"bracketSameLine": true,
"arrowParens": "avoid",
"endOfLine": "lf"
},
"repository": {
"type": "git",
"url": "git+https://github.com/isaacs/minipass.git"
},
"scripts": {
"postpublish": "git push origin --follow-tags",
"postversion": "npm publish",
"preversion": "npm test",
"test": "tap"
},
"tap": {
"check-coverage": true
},
"types": "index.d.ts",
"version": "3.3.6"
}
node_modules/minipass/LICENSE 0000644 00000001423 15170144044 0012051 0 ustar 00 The ISC License
Copyright (c) 2017-2022 npm, Inc., Isaac Z. Schlueter, and Contributors
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
node_modules/minipass/index.js 0000644 00000040367 15170144044 0012523 0 ustar 00 'use strict'
const proc = typeof process === 'object' && process ? process : {
stdout: null,
stderr: null,
}
const EE = require('events')
const Stream = require('stream')
const SD = require('string_decoder').StringDecoder
const EOF = Symbol('EOF')
const MAYBE_EMIT_END = Symbol('maybeEmitEnd')
const EMITTED_END = Symbol('emittedEnd')
const EMITTING_END = Symbol('emittingEnd')
const EMITTED_ERROR = Symbol('emittedError')
const CLOSED = Symbol('closed')
const READ = Symbol('read')
const FLUSH = Symbol('flush')
const FLUSHCHUNK = Symbol('flushChunk')
const ENCODING = Symbol('encoding')
const DECODER = Symbol('decoder')
const FLOWING = Symbol('flowing')
const PAUSED = Symbol('paused')
const RESUME = Symbol('resume')
const BUFFERLENGTH = Symbol('bufferLength')
const BUFFERPUSH = Symbol('bufferPush')
const BUFFERSHIFT = Symbol('bufferShift')
const OBJECTMODE = Symbol('objectMode')
const DESTROYED = Symbol('destroyed')
const EMITDATA = Symbol('emitData')
const EMITEND = Symbol('emitEnd')
const EMITEND2 = Symbol('emitEnd2')
const ASYNC = Symbol('async')
const defer = fn => Promise.resolve().then(fn)
// TODO remove when Node v8 support drops
const doIter = global._MP_NO_ITERATOR_SYMBOLS_ !== '1'
const ASYNCITERATOR = doIter && Symbol.asyncIterator
|| Symbol('asyncIterator not implemented')
const ITERATOR = doIter && Symbol.iterator
|| Symbol('iterator not implemented')
// events that mean 'the stream is over'
// these are treated specially, and re-emitted
// if they are listened for after emitting.
const isEndish = ev =>
ev === 'end' ||
ev === 'finish' ||
ev === 'prefinish'
const isArrayBuffer = b => b instanceof ArrayBuffer ||
typeof b === 'object' &&
b.constructor &&
b.constructor.name === 'ArrayBuffer' &&
b.byteLength >= 0
const isArrayBufferView = b => !Buffer.isBuffer(b) && ArrayBuffer.isView(b)
class Pipe {
constructor (src, dest, opts) {
this.src = src
this.dest = dest
this.opts = opts
this.ondrain = () => src[RESUME]()
dest.on('drain', this.ondrain)
}
unpipe () {
this.dest.removeListener('drain', this.ondrain)
}
// istanbul ignore next - only here for the prototype
proxyErrors () {}
end () {
this.unpipe()
if (this.opts.end)
this.dest.end()
}
}
class PipeProxyErrors extends Pipe {
unpipe () {
this.src.removeListener('error', this.proxyErrors)
super.unpipe()
}
constructor (src, dest, opts) {
super(src, dest, opts)
this.proxyErrors = er => dest.emit('error', er)
src.on('error', this.proxyErrors)
}
}
module.exports = class Minipass extends Stream {
constructor (options) {
super()
this[FLOWING] = false
// whether we're explicitly paused
this[PAUSED] = false
this.pipes = []
this.buffer = []
this[OBJECTMODE] = options && options.objectMode || false
if (this[OBJECTMODE])
this[ENCODING] = null
else
this[ENCODING] = options && options.encoding || null
if (this[ENCODING] === 'buffer')
this[ENCODING] = null
this[ASYNC] = options && !!options.async || false
this[DECODER] = this[ENCODING] ? new SD(this[ENCODING]) : null
this[EOF] = false
this[EMITTED_END] = false
this[EMITTING_END] = false
this[CLOSED] = false
this[EMITTED_ERROR] = null
this.writable = true
this.readable = true
this[BUFFERLENGTH] = 0
this[DESTROYED] = false
}
get bufferLength () { return this[BUFFERLENGTH] }
get encoding () { return this[ENCODING] }
set encoding (enc) {
if (this[OBJECTMODE])
throw new Error('cannot set encoding in objectMode')
if (this[ENCODING] && enc !== this[ENCODING] &&
(this[DECODER] && this[DECODER].lastNeed || this[BUFFERLENGTH]))
throw new Error('cannot change encoding')
if (this[ENCODING] !== enc) {
this[DECODER] = enc ? new SD(enc) : null
if (this.buffer.length)
this.buffer = this.buffer.map(chunk => this[DECODER].write(chunk))
}
this[ENCODING] = enc
}
setEncoding (enc) {
this.encoding = enc
}
get objectMode () { return this[OBJECTMODE] }
set objectMode (om) { this[OBJECTMODE] = this[OBJECTMODE] || !!om }
get ['async'] () { return this[ASYNC] }
set ['async'] (a) { this[ASYNC] = this[ASYNC] || !!a }
write (chunk, encoding, cb) {
if (this[EOF])
throw new Error('write after end')
if (this[DESTROYED]) {
this.emit('error', Object.assign(
new Error('Cannot call write after a stream was destroyed'),
{ code: 'ERR_STREAM_DESTROYED' }
))
return true
}
if (typeof encoding === 'function')
cb = encoding, encoding = 'utf8'
if (!encoding)
encoding = 'utf8'
const fn = this[ASYNC] ? defer : f => f()
// convert array buffers and typed array views into buffers
// at some point in the future, we may want to do the opposite!
// leave strings and buffers as-is
// anything else switches us into object mode
if (!this[OBJECTMODE] && !Buffer.isBuffer(chunk)) {
if (isArrayBufferView(chunk))
chunk = Buffer.from(chunk.buffer, chunk.byteOffset, chunk.byteLength)
else if (isArrayBuffer(chunk))
chunk = Buffer.from(chunk)
else if (typeof chunk !== 'string')
// use the setter so we throw if we have encoding set
this.objectMode = true
}
// handle object mode up front, since it's simpler
// this yields better performance, fewer checks later.
if (this[OBJECTMODE]) {
/* istanbul ignore if - maybe impossible? */
if (this.flowing && this[BUFFERLENGTH] !== 0)
this[FLUSH](true)
if (this.flowing)
this.emit('data', chunk)
else
this[BUFFERPUSH](chunk)
if (this[BUFFERLENGTH] !== 0)
this.emit('readable')
if (cb)
fn(cb)
return this.flowing
}
// at this point the chunk is a buffer or string
// don't buffer it up or send it to the decoder
if (!chunk.length) {
if (this[BUFFERLENGTH] !== 0)
this.emit('readable')
if (cb)
fn(cb)
return this.flowing
}
// fast-path writing strings of same encoding to a stream with
// an empty buffer, skipping the buffer/decoder dance
if (typeof chunk === 'string' &&
// unless it is a string already ready for us to use
!(encoding === this[ENCODING] && !this[DECODER].lastNeed)) {
chunk = Buffer.from(chunk, encoding)
}
if (Buffer.isBuffer(chunk) && this[ENCODING])
chunk = this[DECODER].write(chunk)
// Note: flushing CAN potentially switch us into not-flowing mode
if (this.flowing && this[BUFFERLENGTH] !== 0)
this[FLUSH](true)
if (this.flowing)
this.emit('data', chunk)
else
this[BUFFERPUSH](chunk)
if (this[BUFFERLENGTH] !== 0)
this.emit('readable')
if (cb)
fn(cb)
return this.flowing
}
read (n) {
if (this[DESTROYED])
return null
if (this[BUFFERLENGTH] === 0 || n === 0 || n > this[BUFFERLENGTH]) {
this[MAYBE_EMIT_END]()
return null
}
if (this[OBJECTMODE])
n = null
if (this.buffer.length > 1 && !this[OBJECTMODE]) {
if (this.encoding)
this.buffer = [this.buffer.join('')]
else
this.buffer = [Buffer.concat(this.buffer, this[BUFFERLENGTH])]
}
const ret = this[READ](n || null, this.buffer[0])
this[MAYBE_EMIT_END]()
return ret
}
[READ] (n, chunk) {
if (n === chunk.length || n === null)
this[BUFFERSHIFT]()
else {
this.buffer[0] = chunk.slice(n)
chunk = chunk.slice(0, n)
this[BUFFERLENGTH] -= n
}
this.emit('data', chunk)
if (!this.buffer.length && !this[EOF])
this.emit('drain')
return chunk
}
end (chunk, encoding, cb) {
if (typeof chunk === 'function')
cb = chunk, chunk = null
if (typeof encoding === 'function')
cb = encoding, encoding = 'utf8'
if (chunk)
this.write(chunk, encoding)
if (cb)
this.once('end', cb)
this[EOF] = true
this.writable = false
// if we haven't written anything, then go ahead and emit,
// even if we're not reading.
// we'll re-emit if a new 'end' listener is added anyway.
// This makes MP more suitable to write-only use cases.
if (this.flowing || !this[PAUSED])
this[MAYBE_EMIT_END]()
return this
}
// don't let the internal resume be overwritten
[RESUME] () {
if (this[DESTROYED])
return
this[PAUSED] = false
this[FLOWING] = true
this.emit('resume')
if (this.buffer.length)
this[FLUSH]()
else if (this[EOF])
this[MAYBE_EMIT_END]()
else
this.emit('drain')
}
resume () {
return this[RESUME]()
}
pause () {
this[FLOWING] = false
this[PAUSED] = true
}
get destroyed () {
return this[DESTROYED]
}
get flowing () {
return this[FLOWING]
}
get paused () {
return this[PAUSED]
}
[BUFFERPUSH] (chunk) {
if (this[OBJECTMODE])
this[BUFFERLENGTH] += 1
else
this[BUFFERLENGTH] += chunk.length
this.buffer.push(chunk)
}
[BUFFERSHIFT] () {
if (this.buffer.length) {
if (this[OBJECTMODE])
this[BUFFERLENGTH] -= 1
else
this[BUFFERLENGTH] -= this.buffer[0].length
}
return this.buffer.shift()
}
[FLUSH] (noDrain) {
do {} while (this[FLUSHCHUNK](this[BUFFERSHIFT]()))
if (!noDrain && !this.buffer.length && !this[EOF])
this.emit('drain')
}
[FLUSHCHUNK] (chunk) {
return chunk ? (this.emit('data', chunk), this.flowing) : false
}
pipe (dest, opts) {
if (this[DESTROYED])
return
const ended = this[EMITTED_END]
opts = opts || {}
if (dest === proc.stdout || dest === proc.stderr)
opts.end = false
else
opts.end = opts.end !== false
opts.proxyErrors = !!opts.proxyErrors
// piping an ended stream ends immediately
if (ended) {
if (opts.end)
dest.end()
} else {
this.pipes.push(!opts.proxyErrors ? new Pipe(this, dest, opts)
: new PipeProxyErrors(this, dest, opts))
if (this[ASYNC])
defer(() => this[RESUME]())
else
this[RESUME]()
}
return dest
}
unpipe (dest) {
const p = this.pipes.find(p => p.dest === dest)
if (p) {
this.pipes.splice(this.pipes.indexOf(p), 1)
p.unpipe()
}
}
addListener (ev, fn) {
return this.on(ev, fn)
}
on (ev, fn) {
const ret = super.on(ev, fn)
if (ev === 'data' && !this.pipes.length && !this.flowing)
this[RESUME]()
else if (ev === 'readable' && this[BUFFERLENGTH] !== 0)
super.emit('readable')
else if (isEndish(ev) && this[EMITTED_END]) {
super.emit(ev)
this.removeAllListeners(ev)
} else if (ev === 'error' && this[EMITTED_ERROR]) {
if (this[ASYNC])
defer(() => fn.call(this, this[EMITTED_ERROR]))
else
fn.call(this, this[EMITTED_ERROR])
}
return ret
}
get emittedEnd () {
return this[EMITTED_END]
}
[MAYBE_EMIT_END] () {
if (!this[EMITTING_END] &&
!this[EMITTED_END] &&
!this[DESTROYED] &&
this.buffer.length === 0 &&
this[EOF]) {
this[EMITTING_END] = true
this.emit('end')
this.emit('prefinish')
this.emit('finish')
if (this[CLOSED])
this.emit('close')
this[EMITTING_END] = false
}
}
emit (ev, data, ...extra) {
// error and close are only events allowed after calling destroy()
if (ev !== 'error' && ev !== 'close' && ev !== DESTROYED && this[DESTROYED])
return
else if (ev === 'data') {
return !data ? false
: this[ASYNC] ? defer(() => this[EMITDATA](data))
: this[EMITDATA](data)
} else if (ev === 'end') {
return this[EMITEND]()
} else if (ev === 'close') {
this[CLOSED] = true
// don't emit close before 'end' and 'finish'
if (!this[EMITTED_END] && !this[DESTROYED])
return
const ret = super.emit('close')
this.removeAllListeners('close')
return ret
} else if (ev === 'error') {
this[EMITTED_ERROR] = data
const ret = super.emit('error', data)
this[MAYBE_EMIT_END]()
return ret
} else if (ev === 'resume') {
const ret = super.emit('resume')
this[MAYBE_EMIT_END]()
return ret
} else if (ev === 'finish' || ev === 'prefinish') {
const ret = super.emit(ev)
this.removeAllListeners(ev)
return ret
}
// Some other unknown event
const ret = super.emit(ev, data, ...extra)
this[MAYBE_EMIT_END]()
return ret
}
[EMITDATA] (data) {
for (const p of this.pipes) {
if (p.dest.write(data) === false)
this.pause()
}
const ret = super.emit('data', data)
this[MAYBE_EMIT_END]()
return ret
}
[EMITEND] () {
if (this[EMITTED_END])
return
this[EMITTED_END] = true
this.readable = false
if (this[ASYNC])
defer(() => this[EMITEND2]())
else
this[EMITEND2]()
}
[EMITEND2] () {
if (this[DECODER]) {
const data = this[DECODER].end()
if (data) {
for (const p of this.pipes) {
p.dest.write(data)
}
super.emit('data', data)
}
}
for (const p of this.pipes) {
p.end()
}
const ret = super.emit('end')
this.removeAllListeners('end')
return ret
}
// const all = await stream.collect()
collect () {
const buf = []
if (!this[OBJECTMODE])
buf.dataLength = 0
// set the promise first, in case an error is raised
// by triggering the flow here.
const p = this.promise()
this.on('data', c => {
buf.push(c)
if (!this[OBJECTMODE])
buf.dataLength += c.length
})
return p.then(() => buf)
}
// const data = await stream.concat()
concat () {
return this[OBJECTMODE]
? Promise.reject(new Error('cannot concat in objectMode'))
: this.collect().then(buf =>
this[OBJECTMODE]
? Promise.reject(new Error('cannot concat in objectMode'))
: this[ENCODING] ? buf.join('') : Buffer.concat(buf, buf.dataLength))
}
// stream.promise().then(() => done, er => emitted error)
promise () {
return new Promise((resolve, reject) => {
this.on(DESTROYED, () => reject(new Error('stream destroyed')))
this.on('error', er => reject(er))
this.on('end', () => resolve())
})
}
// for await (let chunk of stream)
[ASYNCITERATOR] () {
const next = () => {
const res = this.read()
if (res !== null)
return Promise.resolve({ done: false, value: res })
if (this[EOF])
return Promise.resolve({ done: true })
let resolve = null
let reject = null
const onerr = er => {
this.removeListener('data', ondata)
this.removeListener('end', onend)
reject(er)
}
const ondata = value => {
this.removeListener('error', onerr)
this.removeListener('end', onend)
this.pause()
resolve({ value: value, done: !!this[EOF] })
}
const onend = () => {
this.removeListener('error', onerr)
this.removeListener('data', ondata)
resolve({ done: true })
}
const ondestroy = () => onerr(new Error('stream destroyed'))
return new Promise((res, rej) => {
reject = rej
resolve = res
this.once(DESTROYED, ondestroy)
this.once('error', onerr)
this.once('end', onend)
this.once('data', ondata)
})
}
return { next }
}
// for (let chunk of stream)
[ITERATOR] () {
const next = () => {
const value = this.read()
const done = value === null
return { value, done }
}
return { next }
}
destroy (er) {
if (this[DESTROYED]) {
if (er)
this.emit('error', er)
else
this.emit(DESTROYED)
return this
}
this[DESTROYED] = true
// throw away all buffered data, it's never coming out
this.buffer.length = 0
this[BUFFERLENGTH] = 0
if (typeof this.close === 'function' && !this[CLOSED])
this.close()
if (er)
this.emit('error', er)
else // if no error to emit, still reject pending promises
this.emit(DESTROYED)
return this
}
static isStream (s) {
return !!s && (s instanceof Minipass || s instanceof Stream ||
s instanceof EE && (
typeof s.pipe === 'function' || // readable
(typeof s.write === 'function' && typeof s.end === 'function') // writable
))
}
}
LICENSE 0000644 00000002421 15170144044 0005550 0 ustar 00 Minizlib was created by Isaac Z. Schlueter.
It is a derivative work of the Node.js project.
"""
Copyright Isaac Z. Schlueter and Contributors
Copyright Node.js contributors. All rights reserved.
Copyright Joyent, Inc. and other Node contributors. All rights reserved.
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
"""
index.js 0000644 00000022344 15170144044 0006216 0 ustar 00 'use strict'
const assert = require('assert')
const Buffer = require('buffer').Buffer
const realZlib = require('zlib')
const constants = exports.constants = require('./constants.js')
const Minipass = require('minipass')
const OriginalBufferConcat = Buffer.concat
const _superWrite = Symbol('_superWrite')
class ZlibError extends Error {
constructor (err) {
super('zlib: ' + err.message)
this.code = err.code
this.errno = err.errno
/* istanbul ignore if */
if (!this.code)
this.code = 'ZLIB_ERROR'
this.message = 'zlib: ' + err.message
Error.captureStackTrace(this, this.constructor)
}
get name () {
return 'ZlibError'
}
}
// the Zlib class they all inherit from
// This thing manages the queue of requests, and returns
// true or false if there is anything in the queue when
// you call the .write() method.
const _opts = Symbol('opts')
const _flushFlag = Symbol('flushFlag')
const _finishFlushFlag = Symbol('finishFlushFlag')
const _fullFlushFlag = Symbol('fullFlushFlag')
const _handle = Symbol('handle')
const _onError = Symbol('onError')
const _sawError = Symbol('sawError')
const _level = Symbol('level')
const _strategy = Symbol('strategy')
const _ended = Symbol('ended')
const _defaultFullFlush = Symbol('_defaultFullFlush')
class ZlibBase extends Minipass {
constructor (opts, mode) {
if (!opts || typeof opts !== 'object')
throw new TypeError('invalid options for ZlibBase constructor')
super(opts)
this[_sawError] = false
this[_ended] = false
this[_opts] = opts
this[_flushFlag] = opts.flush
this[_finishFlushFlag] = opts.finishFlush
// this will throw if any options are invalid for the class selected
try {
this[_handle] = new realZlib[mode](opts)
} catch (er) {
// make sure that all errors get decorated properly
throw new ZlibError(er)
}
this[_onError] = (err) => {
// no sense raising multiple errors, since we abort on the first one.
if (this[_sawError])
return
this[_sawError] = true
// there is no way to cleanly recover.
// continuing only obscures problems.
this.close()
this.emit('error', err)
}
this[_handle].on('error', er => this[_onError](new ZlibError(er)))
this.once('end', () => this.close)
}
close () {
if (this[_handle]) {
this[_handle].close()
this[_handle] = null
this.emit('close')
}
}
reset () {
if (!this[_sawError]) {
assert(this[_handle], 'zlib binding closed')
return this[_handle].reset()
}
}
flush (flushFlag) {
if (this.ended)
return
if (typeof flushFlag !== 'number')
flushFlag = this[_fullFlushFlag]
this.write(Object.assign(Buffer.alloc(0), { [_flushFlag]: flushFlag }))
}
end (chunk, encoding, cb) {
if (chunk)
this.write(chunk, encoding)
this.flush(this[_finishFlushFlag])
this[_ended] = true
return super.end(null, null, cb)
}
get ended () {
return this[_ended]
}
write (chunk, encoding, cb) {
// process the chunk using the sync process
// then super.write() all the outputted chunks
if (typeof encoding === 'function')
cb = encoding, encoding = 'utf8'
if (typeof chunk === 'string')
chunk = Buffer.from(chunk, encoding)
if (this[_sawError])
return
assert(this[_handle], 'zlib binding closed')
// _processChunk tries to .close() the native handle after it's done, so we
// intercept that by temporarily making it a no-op.
const nativeHandle = this[_handle]._handle
const originalNativeClose = nativeHandle.close
nativeHandle.close = () => {}
const originalClose = this[_handle].close
this[_handle].close = () => {}
// It also calls `Buffer.concat()` at the end, which may be convenient
// for some, but which we are not interested in as it slows us down.
Buffer.concat = (args) => args
let result
try {
const flushFlag = typeof chunk[_flushFlag] === 'number'
? chunk[_flushFlag] : this[_flushFlag]
result = this[_handle]._processChunk(chunk, flushFlag)
// if we don't throw, reset it back how it was
Buffer.concat = OriginalBufferConcat
} catch (err) {
// or if we do, put Buffer.concat() back before we emit error
// Error events call into user code, which may call Buffer.concat()
Buffer.concat = OriginalBufferConcat
this[_onError](new ZlibError(err))
} finally {
if (this[_handle]) {
// Core zlib resets `_handle` to null after attempting to close the
// native handle. Our no-op handler prevented actual closure, but we
// need to restore the `._handle` property.
this[_handle]._handle = nativeHandle
nativeHandle.close = originalNativeClose
this[_handle].close = originalClose
// `_processChunk()` adds an 'error' listener. If we don't remove it
// after each call, these handlers start piling up.
this[_handle].removeAllListeners('error')
// make sure OUR error listener is still attached tho
}
}
if (this[_handle])
this[_handle].on('error', er => this[_onError](new ZlibError(er)))
let writeReturn
if (result) {
if (Array.isArray(result) && result.length > 0) {
// The first buffer is always `handle._outBuffer`, which would be
// re-used for later invocations; so, we always have to copy that one.
writeReturn = this[_superWrite](Buffer.from(result[0]))
for (let i = 1; i < result.length; i++) {
writeReturn = this[_superWrite](result[i])
}
} else {
writeReturn = this[_superWrite](Buffer.from(result))
}
}
if (cb)
cb()
return writeReturn
}
[_superWrite] (data) {
return super.write(data)
}
}
class Zlib extends ZlibBase {
constructor (opts, mode) {
opts = opts || {}
opts.flush = opts.flush || constants.Z_NO_FLUSH
opts.finishFlush = opts.finishFlush || constants.Z_FINISH
super(opts, mode)
this[_fullFlushFlag] = constants.Z_FULL_FLUSH
this[_level] = opts.level
this[_strategy] = opts.strategy
}
params (level, strategy) {
if (this[_sawError])
return
if (!this[_handle])
throw new Error('cannot switch params when binding is closed')
// no way to test this without also not supporting params at all
/* istanbul ignore if */
if (!this[_handle].params)
throw new Error('not supported in this implementation')
if (this[_level] !== level || this[_strategy] !== strategy) {
this.flush(constants.Z_SYNC_FLUSH)
assert(this[_handle], 'zlib binding closed')
// .params() calls .flush(), but the latter is always async in the
// core zlib. We override .flush() temporarily to intercept that and
// flush synchronously.
const origFlush = this[_handle].flush
this[_handle].flush = (flushFlag, cb) => {
this.flush(flushFlag)
cb()
}
try {
this[_handle].params(level, strategy)
} finally {
this[_handle].flush = origFlush
}
/* istanbul ignore else */
if (this[_handle]) {
this[_level] = level
this[_strategy] = strategy
}
}
}
}
// minimal 2-byte header
class Deflate extends Zlib {
constructor (opts) {
super(opts, 'Deflate')
}
}
class Inflate extends Zlib {
constructor (opts) {
super(opts, 'Inflate')
}
}
// gzip - bigger header, same deflate compression
const _portable = Symbol('_portable')
class Gzip extends Zlib {
constructor (opts) {
super(opts, 'Gzip')
this[_portable] = opts && !!opts.portable
}
[_superWrite] (data) {
if (!this[_portable])
return super[_superWrite](data)
// we'll always get the header emitted in one first chunk
// overwrite the OS indicator byte with 0xFF
this[_portable] = false
data[9] = 255
return super[_superWrite](data)
}
}
class Gunzip extends Zlib {
constructor (opts) {
super(opts, 'Gunzip')
}
}
// raw - no header
class DeflateRaw extends Zlib {
constructor (opts) {
super(opts, 'DeflateRaw')
}
}
class InflateRaw extends Zlib {
constructor (opts) {
super(opts, 'InflateRaw')
}
}
// auto-detect header.
class Unzip extends Zlib {
constructor (opts) {
super(opts, 'Unzip')
}
}
class Brotli extends ZlibBase {
constructor (opts, mode) {
opts = opts || {}
opts.flush = opts.flush || constants.BROTLI_OPERATION_PROCESS
opts.finishFlush = opts.finishFlush || constants.BROTLI_OPERATION_FINISH
super(opts, mode)
this[_fullFlushFlag] = constants.BROTLI_OPERATION_FLUSH
}
}
class BrotliCompress extends Brotli {
constructor (opts) {
super(opts, 'BrotliCompress')
}
}
class BrotliDecompress extends Brotli {
constructor (opts) {
super(opts, 'BrotliDecompress')
}
}
exports.Deflate = Deflate
exports.Inflate = Inflate
exports.Gzip = Gzip
exports.Gunzip = Gunzip
exports.DeflateRaw = DeflateRaw
exports.InflateRaw = InflateRaw
exports.Unzip = Unzip
/* istanbul ignore else */
if (typeof realZlib.BrotliCompress === 'function') {
exports.BrotliCompress = BrotliCompress
exports.BrotliDecompress = BrotliDecompress
} else {
exports.BrotliCompress = exports.BrotliDecompress = class {
constructor () {
throw new Error('Brotli is not supported in this version of Node.js')
}
}
}
constants.js 0000644 00000007234 15170144044 0007124 0 ustar 00 // Update with any zlib constants that are added or changed in the future.
// Node v6 didn't export this, so we just hard code the version and rely
// on all the other hard-coded values from zlib v4736. When node v6
// support drops, we can just export the realZlibConstants object.
const realZlibConstants = require('zlib').constants ||
/* istanbul ignore next */ { ZLIB_VERNUM: 4736 }
module.exports = Object.freeze(Object.assign(Object.create(null), {
Z_NO_FLUSH: 0,
Z_PARTIAL_FLUSH: 1,
Z_SYNC_FLUSH: 2,
Z_FULL_FLUSH: 3,
Z_FINISH: 4,
Z_BLOCK: 5,
Z_OK: 0,
Z_STREAM_END: 1,
Z_NEED_DICT: 2,
Z_ERRNO: -1,
Z_STREAM_ERROR: -2,
Z_DATA_ERROR: -3,
Z_MEM_ERROR: -4,
Z_BUF_ERROR: -5,
Z_VERSION_ERROR: -6,
Z_NO_COMPRESSION: 0,
Z_BEST_SPEED: 1,
Z_BEST_COMPRESSION: 9,
Z_DEFAULT_COMPRESSION: -1,
Z_FILTERED: 1,
Z_HUFFMAN_ONLY: 2,
Z_RLE: 3,
Z_FIXED: 4,
Z_DEFAULT_STRATEGY: 0,
DEFLATE: 1,
INFLATE: 2,
GZIP: 3,
GUNZIP: 4,
DEFLATERAW: 5,
INFLATERAW: 6,
UNZIP: 7,
BROTLI_DECODE: 8,
BROTLI_ENCODE: 9,
Z_MIN_WINDOWBITS: 8,
Z_MAX_WINDOWBITS: 15,
Z_DEFAULT_WINDOWBITS: 15,
Z_MIN_CHUNK: 64,
Z_MAX_CHUNK: Infinity,
Z_DEFAULT_CHUNK: 16384,
Z_MIN_MEMLEVEL: 1,
Z_MAX_MEMLEVEL: 9,
Z_DEFAULT_MEMLEVEL: 8,
Z_MIN_LEVEL: -1,
Z_MAX_LEVEL: 9,
Z_DEFAULT_LEVEL: -1,
BROTLI_OPERATION_PROCESS: 0,
BROTLI_OPERATION_FLUSH: 1,
BROTLI_OPERATION_FINISH: 2,
BROTLI_OPERATION_EMIT_METADATA: 3,
BROTLI_MODE_GENERIC: 0,
BROTLI_MODE_TEXT: 1,
BROTLI_MODE_FONT: 2,
BROTLI_DEFAULT_MODE: 0,
BROTLI_MIN_QUALITY: 0,
BROTLI_MAX_QUALITY: 11,
BROTLI_DEFAULT_QUALITY: 11,
BROTLI_MIN_WINDOW_BITS: 10,
BROTLI_MAX_WINDOW_BITS: 24,
BROTLI_LARGE_MAX_WINDOW_BITS: 30,
BROTLI_DEFAULT_WINDOW: 22,
BROTLI_MIN_INPUT_BLOCK_BITS: 16,
BROTLI_MAX_INPUT_BLOCK_BITS: 24,
BROTLI_PARAM_MODE: 0,
BROTLI_PARAM_QUALITY: 1,
BROTLI_PARAM_LGWIN: 2,
BROTLI_PARAM_LGBLOCK: 3,
BROTLI_PARAM_DISABLE_LITERAL_CONTEXT_MODELING: 4,
BROTLI_PARAM_SIZE_HINT: 5,
BROTLI_PARAM_LARGE_WINDOW: 6,
BROTLI_PARAM_NPOSTFIX: 7,
BROTLI_PARAM_NDIRECT: 8,
BROTLI_DECODER_RESULT_ERROR: 0,
BROTLI_DECODER_RESULT_SUCCESS: 1,
BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT: 2,
BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT: 3,
BROTLI_DECODER_PARAM_DISABLE_RING_BUFFER_REALLOCATION: 0,
BROTLI_DECODER_PARAM_LARGE_WINDOW: 1,
BROTLI_DECODER_NO_ERROR: 0,
BROTLI_DECODER_SUCCESS: 1,
BROTLI_DECODER_NEEDS_MORE_INPUT: 2,
BROTLI_DECODER_NEEDS_MORE_OUTPUT: 3,
BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_NIBBLE: -1,
BROTLI_DECODER_ERROR_FORMAT_RESERVED: -2,
BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_META_NIBBLE: -3,
BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_ALPHABET: -4,
BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_SAME: -5,
BROTLI_DECODER_ERROR_FORMAT_CL_SPACE: -6,
BROTLI_DECODER_ERROR_FORMAT_HUFFMAN_SPACE: -7,
BROTLI_DECODER_ERROR_FORMAT_CONTEXT_MAP_REPEAT: -8,
BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_1: -9,
BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_2: -10,
BROTLI_DECODER_ERROR_FORMAT_TRANSFORM: -11,
BROTLI_DECODER_ERROR_FORMAT_DICTIONARY: -12,
BROTLI_DECODER_ERROR_FORMAT_WINDOW_BITS: -13,
BROTLI_DECODER_ERROR_FORMAT_PADDING_1: -14,
BROTLI_DECODER_ERROR_FORMAT_PADDING_2: -15,
BROTLI_DECODER_ERROR_FORMAT_DISTANCE: -16,
BROTLI_DECODER_ERROR_DICTIONARY_NOT_SET: -19,
BROTLI_DECODER_ERROR_INVALID_ARGUMENTS: -20,
BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MODES: -21,
BROTLI_DECODER_ERROR_ALLOC_TREE_GROUPS: -22,
BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MAP: -25,
BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_1: -26,
BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_2: -27,
BROTLI_DECODER_ERROR_ALLOC_BLOCK_TYPE_TREES: -30,
BROTLI_DECODER_ERROR_UNREACHABLE: -31,
}, realZlibConstants))