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1.7.4 / 2019-03-18
==================
* deps: compressible@~2.0.16
- Mark `text/less` as compressible
- deps: mime-db@'>= 1.38.0 < 2'
* deps: on-headers@~1.0.2
- Fix `res.writeHead` patch missing return value
* perf: prevent unnecessary buffer copy
1.7.3 / 2018-07-15
==================
* deps: accepts@~1.3.5
- deps: mime-types@~2.1.18
* deps: compressible@~2.0.14
- Mark all XML-derived types as compressible
- deps: mime-db@'>= 1.34.0 < 2'
* deps: safe-buffer@5.1.2
1.7.2 / 2018-02-18
==================
* deps: compressible@~2.0.13
- deps: mime-db@'>= 1.33.0 < 2'
1.7.1 / 2017-09-26
==================
* deps: accepts@~1.3.4
- deps: mime-types@~2.1.16
* deps: bytes@3.0.0
* deps: compressible@~2.0.11
- deps: mime-db@'>= 1.29.0 < 2'
* deps: debug@2.6.9
* deps: vary@~1.1.2
- perf: improve header token parsing speed
1.7.0 / 2017-07-10
==================
* Use `safe-buffer` for improved Buffer API
* deps: bytes@2.5.0
* deps: compressible@~2.0.10
- Fix regex fallback to not override `compressible: false` in db
- deps: mime-db@'>= 1.27.0 < 2'
* deps: debug@2.6.8
- Allow colors in workers
- Deprecated `DEBUG_FD` environment variable set to `3` or higher
- Fix error when running under React Native
- Fix `DEBUG_MAX_ARRAY_LENGTH`
- Use same color for same namespace
- deps: ms@2.0.0
* deps: vary@~1.1.1
- perf: hoist regular expression
1.6.2 / 2016-05-12
==================
* deps: accepts@~1.3.3
- deps: mime-types@~2.1.11
- deps: negotiator@0.6.1
* deps: bytes@2.3.0
- Drop partial bytes on all parsed units
- Fix parsing byte string that looks like hex
- perf: hoist regular expressions
* deps: compressible@~2.0.8
- deps: mime-db@'>= 1.23.0 < 2'
1.6.1 / 2016-01-19
==================
* deps: bytes@2.2.0
* deps: compressible@~2.0.7
- deps: mime-db@'>= 1.21.0 < 2'
* deps: accepts@~1.3.1
- deps: mime-types@~2.1.9
1.6.0 / 2015-09-29
==================
* Skip compression when response has `Cache-Control: no-transform`
* deps: accepts@~1.3.0
- deps: mime-types@~2.1.7
- deps: negotiator@0.6.0
* deps: compressible@~2.0.6
- deps: mime-db@'>= 1.19.0 < 2'
* deps: on-headers@~1.0.1
- perf: enable strict mode
* deps: vary@~1.1.0
- Only accept valid field names in the `field` argument
1.5.2 / 2015-07-30
==================
* deps: accepts@~1.2.12
- deps: mime-types@~2.1.4
* deps: compressible@~2.0.5
- deps: mime-db@'>= 1.16.0 < 2'
* deps: vary@~1.0.1
- Fix setting empty header from empty `field`
- perf: enable strict mode
- perf: remove argument reassignments
1.5.1 / 2015-07-05
==================
* deps: accepts@~1.2.10
- deps: mime-types@~2.1.2
* deps: compressible@~2.0.4
- deps: mime-db@'>= 1.14.0 < 2'
- perf: enable strict mode
1.5.0 / 2015-06-09
==================
* Fix return value from `.end` and `.write` after end
* Improve detection of zero-length body without `Content-Length`
* deps: accepts@~1.2.9
- deps: mime-types@~2.1.1
- perf: avoid argument reassignment & argument slice
- perf: avoid negotiator recursive construction
- perf: enable strict mode
- perf: remove unnecessary bitwise operator
* deps: bytes@2.1.0
- Slight optimizations
- Units no longer case sensitive when parsing
* deps: compressible@~2.0.3
- Fix regex fallback to work if type exists, but is undefined
- deps: mime-db@'>= 1.13.0 < 2'
- perf: hoist regex declaration
- perf: use regex to extract mime
* perf: enable strict mode
* perf: remove flush reassignment
* perf: simplify threshold detection
1.4.4 / 2015-05-11
==================
* deps: accepts@~1.2.7
- deps: mime-types@~2.0.11
- deps: negotiator@0.5.3
* deps: debug@~2.2.0
- deps: ms@0.7.1
1.4.3 / 2015-03-14
==================
* deps: accepts@~1.2.5
- deps: mime-types@~2.0.10
* deps: debug@~2.1.3
- Fix high intensity foreground color for bold
- deps: ms@0.7.0
1.4.2 / 2015-03-11
==================
* Fix error when code calls `res.end(str, encoding)`
- Specific to Node.js 0.8
* deps: debug@~2.1.2
- deps: ms@0.7.0
1.4.1 / 2015-02-15
==================
* deps: accepts@~1.2.4
- deps: mime-types@~2.0.9
- deps: negotiator@0.5.1
1.4.0 / 2015-02-01
==================
* Prefer `gzip` over `deflate` on the server
- Not all clients agree on what "deflate" coding means
1.3.1 / 2015-01-31
==================
* deps: accepts@~1.2.3
- deps: mime-types@~2.0.8
* deps: compressible@~2.0.2
- deps: mime-db@'>= 1.1.2 < 2'
1.3.0 / 2014-12-30
==================
* Export the default `filter` function for wrapping
* deps: accepts@~1.2.2
- deps: mime-types@~2.0.7
- deps: negotiator@0.5.0
* deps: debug@~2.1.1
1.2.2 / 2014-12-10
==================
* Fix `.end` to only proxy to `.end`
- Fixes an issue with Node.js 0.11.14
* deps: accepts@~1.1.4
- deps: mime-types@~2.0.4
1.2.1 / 2014-11-23
==================
* deps: accepts@~1.1.3
- deps: mime-types@~2.0.3
1.2.0 / 2014-10-16
==================
* deps: debug@~2.1.0
- Implement `DEBUG_FD` env variable support
1.1.2 / 2014-10-15
==================
* deps: accepts@~1.1.2
- Fix error when media type has invalid parameter
- deps: negotiator@0.4.9
1.1.1 / 2014-10-12
==================
* deps: accepts@~1.1.1
- deps: mime-types@~2.0.2
- deps: negotiator@0.4.8
* deps: compressible@~2.0.1
- deps: mime-db@1.x
1.1.0 / 2014-09-07
==================
* deps: accepts@~1.1.0
* deps: compressible@~2.0.0
* deps: debug@~2.0.0
1.0.11 / 2014-08-10
===================
* deps: on-headers@~1.0.0
* deps: vary@~1.0.0
1.0.10 / 2014-08-05
===================
* deps: compressible@~1.1.1
- Fix upper-case Content-Type characters prevent compression
1.0.9 / 2014-07-20
==================
* Add `debug` messages
* deps: accepts@~1.0.7
- deps: negotiator@0.4.7
1.0.8 / 2014-06-20
==================
* deps: accepts@~1.0.5
- use `mime-types`
1.0.7 / 2014-06-11
==================
* use vary module for better `Vary` behavior
* deps: accepts@1.0.3
* deps: compressible@1.1.0
1.0.6 / 2014-06-03
==================
* fix regression when negotiation fails
1.0.5 / 2014-06-03
==================
* fix listeners for delayed stream creation
- fixes regression for certain `stream.pipe(res)` situations
1.0.4 / 2014-06-03
==================
* fix adding `Vary` when value stored as array
* fix back-pressure behavior
* fix length check for `res.end`
1.0.3 / 2014-05-29
==================
* use `accepts` for negotiation
* use `on-headers` to handle header checking
* deps: bytes@1.0.0
1.0.2 / 2014-04-29
==================
* only version compatible with node.js 0.8
* support headers given to `res.writeHead`
* deps: bytes@0.3.0
* deps: negotiator@0.4.3
1.0.1 / 2014-03-08
==================
* bump negotiator
* use compressible
* use .headersSent (drops 0.8 support)
* handle identity;q=0 case

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(The MIT License)
Copyright (c) 2014 Jonathan Ong <me@jongleberry.com>
Copyright (c) 2014-2015 Douglas Christopher Wilson <doug@somethingdoug.com>
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.

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# compression
[![NPM Version][npm-image]][npm-url]
[![NPM Downloads][downloads-image]][downloads-url]
[![Build Status][travis-image]][travis-url]
[![Test Coverage][coveralls-image]][coveralls-url]
Node.js compression middleware.
The following compression codings are supported:
- deflate
- gzip
## Install
This is a [Node.js](https://nodejs.org/en/) module available through the
[npm registry](https://www.npmjs.com/). Installation is done using the
[`npm install` command](https://docs.npmjs.com/getting-started/installing-npm-packages-locally):
```bash
$ npm install compression
```
## API
<!-- eslint-disable no-unused-vars -->
```js
var compression = require('compression')
```
### compression([options])
Returns the compression middleware using the given `options`. The middleware
will attempt to compress response bodies for all request that traverse through
the middleware, based on the given `options`.
This middleware will never compress responses that include a `Cache-Control`
header with the [`no-transform` directive](https://tools.ietf.org/html/rfc7234#section-5.2.2.4),
as compressing will transform the body.
#### Options
`compression()` accepts these properties in the options object. In addition to
those listed below, [zlib](http://nodejs.org/api/zlib.html) options may be
passed in to the options object.
##### chunkSize
The default value is `zlib.Z_DEFAULT_CHUNK`, or `16384`.
See [Node.js documentation](http://nodejs.org/api/zlib.html#zlib_memory_usage_tuning)
regarding the usage.
##### filter
A function to decide if the response should be considered for compression.
This function is called as `filter(req, res)` and is expected to return
`true` to consider the response for compression, or `false` to not compress
the response.
The default filter function uses the [compressible](https://www.npmjs.com/package/compressible)
module to determine if `res.getHeader('Content-Type')` is compressible.
##### level
The level of zlib compression to apply to responses. A higher level will result
in better compression, but will take longer to complete. A lower level will
result in less compression, but will be much faster.
This is an integer in the range of `0` (no compression) to `9` (maximum
compression). The special value `-1` can be used to mean the "default
compression level", which is a default compromise between speed and
compression (currently equivalent to level 6).
- `-1` Default compression level (also `zlib.Z_DEFAULT_COMPRESSION`).
- `0` No compression (also `zlib.Z_NO_COMPRESSION`).
- `1` Fastest compression (also `zlib.Z_BEST_SPEED`).
- `2`
- `3`
- `4`
- `5`
- `6` (currently what `zlib.Z_DEFAULT_COMPRESSION` points to).
- `7`
- `8`
- `9` Best compression (also `zlib.Z_BEST_COMPRESSION`).
The default value is `zlib.Z_DEFAULT_COMPRESSION`, or `-1`.
**Note** in the list above, `zlib` is from `zlib = require('zlib')`.
##### memLevel
This specifies how much memory should be allocated for the internal compression
state and is an integer in the range of `1` (minimum level) and `9` (maximum
level).
The default value is `zlib.Z_DEFAULT_MEMLEVEL`, or `8`.
See [Node.js documentation](http://nodejs.org/api/zlib.html#zlib_memory_usage_tuning)
regarding the usage.
##### strategy
This is used to tune the compression algorithm. This value only affects the
compression ratio, not the correctness of the compressed output, even if it
is not set appropriately.
- `zlib.Z_DEFAULT_STRATEGY` Use for normal data.
- `zlib.Z_FILTERED` Use for data produced by a filter (or predictor).
Filtered data consists mostly of small values with a somewhat random
distribution. In this case, the compression algorithm is tuned to
compress them better. The effect is to force more Huffman coding and less
string matching; it is somewhat intermediate between `zlib.Z_DEFAULT_STRATEGY`
and `zlib.Z_HUFFMAN_ONLY`.
- `zlib.Z_FIXED` Use to prevent the use of dynamic Huffman codes, allowing
for a simpler decoder for special applications.
- `zlib.Z_HUFFMAN_ONLY` Use to force Huffman encoding only (no string match).
- `zlib.Z_RLE` Use to limit match distances to one (run-length encoding).
This is designed to be almost as fast as `zlib.Z_HUFFMAN_ONLY`, but give
better compression for PNG image data.
**Note** in the list above, `zlib` is from `zlib = require('zlib')`.
##### threshold
The byte threshold for the response body size before compression is considered
for the response, defaults to `1kb`. This is a number of bytes or any string
accepted by the [bytes](https://www.npmjs.com/package/bytes) module.
**Note** this is only an advisory setting; if the response size cannot be determined
at the time the response headers are written, then it is assumed the response is
_over_ the threshold. To guarantee the response size can be determined, be sure
set a `Content-Length` response header.
##### windowBits
The default value is `zlib.Z_DEFAULT_WINDOWBITS`, or `15`.
See [Node.js documentation](http://nodejs.org/api/zlib.html#zlib_memory_usage_tuning)
regarding the usage.
#### .filter
The default `filter` function. This is used to construct a custom filter
function that is an extension of the default function.
```js
var compression = require('compression')
var express = require('express')
var app = express()
app.use(compression({ filter: shouldCompress }))
function shouldCompress (req, res) {
if (req.headers['x-no-compression']) {
// don't compress responses with this request header
return false
}
// fallback to standard filter function
return compression.filter(req, res)
}
```
### res.flush
This module adds a `res.flush()` method to force the partially-compressed
response to be flushed to the client.
## Examples
### express/connect
When using this module with express or connect, simply `app.use` the module as
high as you like. Requests that pass through the middleware will be compressed.
```js
var compression = require('compression')
var express = require('express')
var app = express()
// compress all responses
app.use(compression())
// add all routes
```
### Server-Sent Events
Because of the nature of compression this module does not work out of the box
with server-sent events. To compress content, a window of the output needs to
be buffered up in order to get good compression. Typically when using server-sent
events, there are certain block of data that need to reach the client.
You can achieve this by calling `res.flush()` when you need the data written to
actually make it to the client.
```js
var compression = require('compression')
var express = require('express')
var app = express()
// compress responses
app.use(compression())
// server-sent event stream
app.get('/events', function (req, res) {
res.setHeader('Content-Type', 'text/event-stream')
res.setHeader('Cache-Control', 'no-cache')
// send a ping approx every 2 seconds
var timer = setInterval(function () {
res.write('data: ping\n\n')
// !!! this is the important part
res.flush()
}, 2000)
res.on('close', function () {
clearInterval(timer)
})
})
```
## License
[MIT](LICENSE)
[npm-image]: https://img.shields.io/npm/v/compression.svg
[npm-url]: https://npmjs.org/package/compression
[travis-image]: https://img.shields.io/travis/expressjs/compression/master.svg
[travis-url]: https://travis-ci.org/expressjs/compression
[coveralls-image]: https://img.shields.io/coveralls/expressjs/compression/master.svg
[coveralls-url]: https://coveralls.io/r/expressjs/compression?branch=master
[downloads-image]: https://img.shields.io/npm/dm/compression.svg
[downloads-url]: https://npmjs.org/package/compression

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/*!
* compression
* Copyright(c) 2010 Sencha Inc.
* Copyright(c) 2011 TJ Holowaychuk
* Copyright(c) 2014 Jonathan Ong
* Copyright(c) 2014-2015 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict'
/**
* Module dependencies.
* @private
*/
var accepts = require('accepts')
var Buffer = require('safe-buffer').Buffer
var bytes = require('bytes')
var compressible = require('compressible')
var debug = require('debug')('compression')
var onHeaders = require('on-headers')
var vary = require('vary')
var zlib = require('zlib')
/**
* Module exports.
*/
module.exports = compression
module.exports.filter = shouldCompress
/**
* Module variables.
* @private
*/
var cacheControlNoTransformRegExp = /(?:^|,)\s*?no-transform\s*?(?:,|$)/
/**
* Compress response data with gzip / deflate.
*
* @param {Object} [options]
* @return {Function} middleware
* @public
*/
function compression (options) {
var opts = options || {}
// options
var filter = opts.filter || shouldCompress
var threshold = bytes.parse(opts.threshold)
if (threshold == null) {
threshold = 1024
}
return function compression (req, res, next) {
var ended = false
var length
var listeners = []
var stream
var _end = res.end
var _on = res.on
var _write = res.write
// flush
res.flush = function flush () {
if (stream) {
stream.flush()
}
}
// proxy
res.write = function write (chunk, encoding) {
if (ended) {
return false
}
if (!this._header) {
this._implicitHeader()
}
return stream
? stream.write(toBuffer(chunk, encoding))
: _write.call(this, chunk, encoding)
}
res.end = function end (chunk, encoding) {
if (ended) {
return false
}
if (!this._header) {
// estimate the length
if (!this.getHeader('Content-Length')) {
length = chunkLength(chunk, encoding)
}
this._implicitHeader()
}
if (!stream) {
return _end.call(this, chunk, encoding)
}
// mark ended
ended = true
// write Buffer for Node.js 0.8
return chunk
? stream.end(toBuffer(chunk, encoding))
: stream.end()
}
res.on = function on (type, listener) {
if (!listeners || type !== 'drain') {
return _on.call(this, type, listener)
}
if (stream) {
return stream.on(type, listener)
}
// buffer listeners for future stream
listeners.push([type, listener])
return this
}
function nocompress (msg) {
debug('no compression: %s', msg)
addListeners(res, _on, listeners)
listeners = null
}
onHeaders(res, function onResponseHeaders () {
// determine if request is filtered
if (!filter(req, res)) {
nocompress('filtered')
return
}
// determine if the entity should be transformed
if (!shouldTransform(req, res)) {
nocompress('no transform')
return
}
// vary
vary(res, 'Accept-Encoding')
// content-length below threshold
if (Number(res.getHeader('Content-Length')) < threshold || length < threshold) {
nocompress('size below threshold')
return
}
var encoding = res.getHeader('Content-Encoding') || 'identity'
// already encoded
if (encoding !== 'identity') {
nocompress('already encoded')
return
}
// head
if (req.method === 'HEAD') {
nocompress('HEAD request')
return
}
// compression method
var accept = accepts(req)
var method = accept.encoding(['gzip', 'deflate', 'identity'])
// we really don't prefer deflate
if (method === 'deflate' && accept.encoding(['gzip'])) {
method = accept.encoding(['gzip', 'identity'])
}
// negotiation failed
if (!method || method === 'identity') {
nocompress('not acceptable')
return
}
// compression stream
debug('%s compression', method)
stream = method === 'gzip'
? zlib.createGzip(opts)
: zlib.createDeflate(opts)
// add buffered listeners to stream
addListeners(stream, stream.on, listeners)
// header fields
res.setHeader('Content-Encoding', method)
res.removeHeader('Content-Length')
// compression
stream.on('data', function onStreamData (chunk) {
if (_write.call(res, chunk) === false) {
stream.pause()
}
})
stream.on('end', function onStreamEnd () {
_end.call(res)
})
_on.call(res, 'drain', function onResponseDrain () {
stream.resume()
})
})
next()
}
}
/**
* Add bufferred listeners to stream
* @private
*/
function addListeners (stream, on, listeners) {
for (var i = 0; i < listeners.length; i++) {
on.apply(stream, listeners[i])
}
}
/**
* Get the length of a given chunk
*/
function chunkLength (chunk, encoding) {
if (!chunk) {
return 0
}
return !Buffer.isBuffer(chunk)
? Buffer.byteLength(chunk, encoding)
: chunk.length
}
/**
* Default filter function.
* @private
*/
function shouldCompress (req, res) {
var type = res.getHeader('Content-Type')
if (type === undefined || !compressible(type)) {
debug('%s not compressible', type)
return false
}
return true
}
/**
* Determine if the entity should be transformed.
* @private
*/
function shouldTransform (req, res) {
var cacheControl = res.getHeader('Cache-Control')
// Don't compress for Cache-Control: no-transform
// https://tools.ietf.org/html/rfc7234#section-5.2.2.4
return !cacheControl ||
!cacheControlNoTransformRegExp.test(cacheControl)
}
/**
* Coerce arguments to Buffer
* @private
*/
function toBuffer (chunk, encoding) {
return !Buffer.isBuffer(chunk)
? Buffer.from(chunk, encoding)
: chunk
}

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The MIT License (MIT)
Copyright (c) Feross Aboukhadijeh
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.

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# safe-buffer [![travis][travis-image]][travis-url] [![npm][npm-image]][npm-url] [![downloads][downloads-image]][downloads-url] [![javascript style guide][standard-image]][standard-url]
[travis-image]: https://img.shields.io/travis/feross/safe-buffer/master.svg
[travis-url]: https://travis-ci.org/feross/safe-buffer
[npm-image]: https://img.shields.io/npm/v/safe-buffer.svg
[npm-url]: https://npmjs.org/package/safe-buffer
[downloads-image]: https://img.shields.io/npm/dm/safe-buffer.svg
[downloads-url]: https://npmjs.org/package/safe-buffer
[standard-image]: https://img.shields.io/badge/code_style-standard-brightgreen.svg
[standard-url]: https://standardjs.com
#### Safer Node.js Buffer API
**Use the new Node.js Buffer APIs (`Buffer.from`, `Buffer.alloc`,
`Buffer.allocUnsafe`, `Buffer.allocUnsafeSlow`) in all versions of Node.js.**
**Uses the built-in implementation when available.**
## install
```
npm install safe-buffer
```
## usage
The goal of this package is to provide a safe replacement for the node.js `Buffer`.
It's a drop-in replacement for `Buffer`. You can use it by adding one `require` line to
the top of your node.js modules:
```js
var Buffer = require('safe-buffer').Buffer
// Existing buffer code will continue to work without issues:
new Buffer('hey', 'utf8')
new Buffer([1, 2, 3], 'utf8')
new Buffer(obj)
new Buffer(16) // create an uninitialized buffer (potentially unsafe)
// But you can use these new explicit APIs to make clear what you want:
Buffer.from('hey', 'utf8') // convert from many types to a Buffer
Buffer.alloc(16) // create a zero-filled buffer (safe)
Buffer.allocUnsafe(16) // create an uninitialized buffer (potentially unsafe)
```
## api
### Class Method: Buffer.from(array)
<!-- YAML
added: v3.0.0
-->
* `array` {Array}
Allocates a new `Buffer` using an `array` of octets.
```js
const buf = Buffer.from([0x62,0x75,0x66,0x66,0x65,0x72]);
// creates a new Buffer containing ASCII bytes
// ['b','u','f','f','e','r']
```
A `TypeError` will be thrown if `array` is not an `Array`.
### Class Method: Buffer.from(arrayBuffer[, byteOffset[, length]])
<!-- YAML
added: v5.10.0
-->
* `arrayBuffer` {ArrayBuffer} The `.buffer` property of a `TypedArray` or
a `new ArrayBuffer()`
* `byteOffset` {Number} Default: `0`
* `length` {Number} Default: `arrayBuffer.length - byteOffset`
When passed a reference to the `.buffer` property of a `TypedArray` instance,
the newly created `Buffer` will share the same allocated memory as the
TypedArray.
```js
const arr = new Uint16Array(2);
arr[0] = 5000;
arr[1] = 4000;
const buf = Buffer.from(arr.buffer); // shares the memory with arr;
console.log(buf);
// Prints: <Buffer 88 13 a0 0f>
// changing the TypedArray changes the Buffer also
arr[1] = 6000;
console.log(buf);
// Prints: <Buffer 88 13 70 17>
```
The optional `byteOffset` and `length` arguments specify a memory range within
the `arrayBuffer` that will be shared by the `Buffer`.
```js
const ab = new ArrayBuffer(10);
const buf = Buffer.from(ab, 0, 2);
console.log(buf.length);
// Prints: 2
```
A `TypeError` will be thrown if `arrayBuffer` is not an `ArrayBuffer`.
### Class Method: Buffer.from(buffer)
<!-- YAML
added: v3.0.0
-->
* `buffer` {Buffer}
Copies the passed `buffer` data onto a new `Buffer` instance.
```js
const buf1 = Buffer.from('buffer');
const buf2 = Buffer.from(buf1);
buf1[0] = 0x61;
console.log(buf1.toString());
// 'auffer'
console.log(buf2.toString());
// 'buffer' (copy is not changed)
```
A `TypeError` will be thrown if `buffer` is not a `Buffer`.
### Class Method: Buffer.from(str[, encoding])
<!-- YAML
added: v5.10.0
-->
* `str` {String} String to encode.
* `encoding` {String} Encoding to use, Default: `'utf8'`
Creates a new `Buffer` containing the given JavaScript string `str`. If
provided, the `encoding` parameter identifies the character encoding.
If not provided, `encoding` defaults to `'utf8'`.
```js
const buf1 = Buffer.from('this is a tést');
console.log(buf1.toString());
// prints: this is a tést
console.log(buf1.toString('ascii'));
// prints: this is a tC)st
const buf2 = Buffer.from('7468697320697320612074c3a97374', 'hex');
console.log(buf2.toString());
// prints: this is a tést
```
A `TypeError` will be thrown if `str` is not a string.
### Class Method: Buffer.alloc(size[, fill[, encoding]])
<!-- YAML
added: v5.10.0
-->
* `size` {Number}
* `fill` {Value} Default: `undefined`
* `encoding` {String} Default: `utf8`
Allocates a new `Buffer` of `size` bytes. If `fill` is `undefined`, the
`Buffer` will be *zero-filled*.
```js
const buf = Buffer.alloc(5);
console.log(buf);
// <Buffer 00 00 00 00 00>
```
The `size` must be less than or equal to the value of
`require('buffer').kMaxLength` (on 64-bit architectures, `kMaxLength` is
`(2^31)-1`). Otherwise, a [`RangeError`][] is thrown. A zero-length Buffer will
be created if a `size` less than or equal to 0 is specified.
If `fill` is specified, the allocated `Buffer` will be initialized by calling
`buf.fill(fill)`. See [`buf.fill()`][] for more information.
```js
const buf = Buffer.alloc(5, 'a');
console.log(buf);
// <Buffer 61 61 61 61 61>
```
If both `fill` and `encoding` are specified, the allocated `Buffer` will be
initialized by calling `buf.fill(fill, encoding)`. For example:
```js
const buf = Buffer.alloc(11, 'aGVsbG8gd29ybGQ=', 'base64');
console.log(buf);
// <Buffer 68 65 6c 6c 6f 20 77 6f 72 6c 64>
```
Calling `Buffer.alloc(size)` can be significantly slower than the alternative
`Buffer.allocUnsafe(size)` but ensures that the newly created `Buffer` instance
contents will *never contain sensitive data*.
A `TypeError` will be thrown if `size` is not a number.
### Class Method: Buffer.allocUnsafe(size)
<!-- YAML
added: v5.10.0
-->
* `size` {Number}
Allocates a new *non-zero-filled* `Buffer` of `size` bytes. The `size` must
be less than or equal to the value of `require('buffer').kMaxLength` (on 64-bit
architectures, `kMaxLength` is `(2^31)-1`). Otherwise, a [`RangeError`][] is
thrown. A zero-length Buffer will be created if a `size` less than or equal to
0 is specified.
The underlying memory for `Buffer` instances created in this way is *not
initialized*. The contents of the newly created `Buffer` are unknown and
*may contain sensitive data*. Use [`buf.fill(0)`][] to initialize such
`Buffer` instances to zeroes.
```js
const buf = Buffer.allocUnsafe(5);
console.log(buf);
// <Buffer 78 e0 82 02 01>
// (octets will be different, every time)
buf.fill(0);
console.log(buf);
// <Buffer 00 00 00 00 00>
```
A `TypeError` will be thrown if `size` is not a number.
Note that the `Buffer` module pre-allocates an internal `Buffer` instance of
size `Buffer.poolSize` that is used as a pool for the fast allocation of new
`Buffer` instances created using `Buffer.allocUnsafe(size)` (and the deprecated
`new Buffer(size)` constructor) only when `size` is less than or equal to
`Buffer.poolSize >> 1` (floor of `Buffer.poolSize` divided by two). The default
value of `Buffer.poolSize` is `8192` but can be modified.
Use of this pre-allocated internal memory pool is a key difference between
calling `Buffer.alloc(size, fill)` vs. `Buffer.allocUnsafe(size).fill(fill)`.
Specifically, `Buffer.alloc(size, fill)` will *never* use the internal Buffer
pool, while `Buffer.allocUnsafe(size).fill(fill)` *will* use the internal
Buffer pool if `size` is less than or equal to half `Buffer.poolSize`. The
difference is subtle but can be important when an application requires the
additional performance that `Buffer.allocUnsafe(size)` provides.
### Class Method: Buffer.allocUnsafeSlow(size)
<!-- YAML
added: v5.10.0
-->
* `size` {Number}
Allocates a new *non-zero-filled* and non-pooled `Buffer` of `size` bytes. The
`size` must be less than or equal to the value of
`require('buffer').kMaxLength` (on 64-bit architectures, `kMaxLength` is
`(2^31)-1`). Otherwise, a [`RangeError`][] is thrown. A zero-length Buffer will
be created if a `size` less than or equal to 0 is specified.
The underlying memory for `Buffer` instances created in this way is *not
initialized*. The contents of the newly created `Buffer` are unknown and
*may contain sensitive data*. Use [`buf.fill(0)`][] to initialize such
`Buffer` instances to zeroes.
When using `Buffer.allocUnsafe()` to allocate new `Buffer` instances,
allocations under 4KB are, by default, sliced from a single pre-allocated
`Buffer`. This allows applications to avoid the garbage collection overhead of
creating many individually allocated Buffers. This approach improves both
performance and memory usage by eliminating the need to track and cleanup as
many `Persistent` objects.
However, in the case where a developer may need to retain a small chunk of
memory from a pool for an indeterminate amount of time, it may be appropriate
to create an un-pooled Buffer instance using `Buffer.allocUnsafeSlow()` then
copy out the relevant bits.
```js
// need to keep around a few small chunks of memory
const store = [];
socket.on('readable', () => {
const data = socket.read();
// allocate for retained data
const sb = Buffer.allocUnsafeSlow(10);
// copy the data into the new allocation
data.copy(sb, 0, 0, 10);
store.push(sb);
});
```
Use of `Buffer.allocUnsafeSlow()` should be used only as a last resort *after*
a developer has observed undue memory retention in their applications.
A `TypeError` will be thrown if `size` is not a number.
### All the Rest
The rest of the `Buffer` API is exactly the same as in node.js.
[See the docs](https://nodejs.org/api/buffer.html).
## Related links
- [Node.js issue: Buffer(number) is unsafe](https://github.com/nodejs/node/issues/4660)
- [Node.js Enhancement Proposal: Buffer.from/Buffer.alloc/Buffer.zalloc/Buffer() soft-deprecate](https://github.com/nodejs/node-eps/pull/4)
## Why is `Buffer` unsafe?
Today, the node.js `Buffer` constructor is overloaded to handle many different argument
types like `String`, `Array`, `Object`, `TypedArrayView` (`Uint8Array`, etc.),
`ArrayBuffer`, and also `Number`.
The API is optimized for convenience: you can throw any type at it, and it will try to do
what you want.
Because the Buffer constructor is so powerful, you often see code like this:
```js
// Convert UTF-8 strings to hex
function toHex (str) {
return new Buffer(str).toString('hex')
}
```
***But what happens if `toHex` is called with a `Number` argument?***
### Remote Memory Disclosure
If an attacker can make your program call the `Buffer` constructor with a `Number`
argument, then they can make it allocate uninitialized memory from the node.js process.
This could potentially disclose TLS private keys, user data, or database passwords.
When the `Buffer` constructor is passed a `Number` argument, it returns an
**UNINITIALIZED** block of memory of the specified `size`. When you create a `Buffer` like
this, you **MUST** overwrite the contents before returning it to the user.
From the [node.js docs](https://nodejs.org/api/buffer.html#buffer_new_buffer_size):
> `new Buffer(size)`
>
> - `size` Number
>
> The underlying memory for `Buffer` instances created in this way is not initialized.
> **The contents of a newly created `Buffer` are unknown and could contain sensitive
> data.** Use `buf.fill(0)` to initialize a Buffer to zeroes.
(Emphasis our own.)
Whenever the programmer intended to create an uninitialized `Buffer` you often see code
like this:
```js
var buf = new Buffer(16)
// Immediately overwrite the uninitialized buffer with data from another buffer
for (var i = 0; i < buf.length; i++) {
buf[i] = otherBuf[i]
}
```
### Would this ever be a problem in real code?
Yes. It's surprisingly common to forget to check the type of your variables in a
dynamically-typed language like JavaScript.
Usually the consequences of assuming the wrong type is that your program crashes with an
uncaught exception. But the failure mode for forgetting to check the type of arguments to
the `Buffer` constructor is more catastrophic.
Here's an example of a vulnerable service that takes a JSON payload and converts it to
hex:
```js
// Take a JSON payload {str: "some string"} and convert it to hex
var server = http.createServer(function (req, res) {
var data = ''
req.setEncoding('utf8')
req.on('data', function (chunk) {
data += chunk
})
req.on('end', function () {
var body = JSON.parse(data)
res.end(new Buffer(body.str).toString('hex'))
})
})
server.listen(8080)
```
In this example, an http client just has to send:
```json
{
"str": 1000
}
```
and it will get back 1,000 bytes of uninitialized memory from the server.
This is a very serious bug. It's similar in severity to the
[the Heartbleed bug](http://heartbleed.com/) that allowed disclosure of OpenSSL process
memory by remote attackers.
### Which real-world packages were vulnerable?
#### [`bittorrent-dht`](https://www.npmjs.com/package/bittorrent-dht)
[Mathias Buus](https://github.com/mafintosh) and I
([Feross Aboukhadijeh](http://feross.org/)) found this issue in one of our own packages,
[`bittorrent-dht`](https://www.npmjs.com/package/bittorrent-dht). The bug would allow
anyone on the internet to send a series of messages to a user of `bittorrent-dht` and get
them to reveal 20 bytes at a time of uninitialized memory from the node.js process.
Here's
[the commit](https://github.com/feross/bittorrent-dht/commit/6c7da04025d5633699800a99ec3fbadf70ad35b8)
that fixed it. We released a new fixed version, created a
[Node Security Project disclosure](https://nodesecurity.io/advisories/68), and deprecated all
vulnerable versions on npm so users will get a warning to upgrade to a newer version.
#### [`ws`](https://www.npmjs.com/package/ws)
That got us wondering if there were other vulnerable packages. Sure enough, within a short
period of time, we found the same issue in [`ws`](https://www.npmjs.com/package/ws), the
most popular WebSocket implementation in node.js.
If certain APIs were called with `Number` parameters instead of `String` or `Buffer` as
expected, then uninitialized server memory would be disclosed to the remote peer.
These were the vulnerable methods:
```js
socket.send(number)
socket.ping(number)
socket.pong(number)
```
Here's a vulnerable socket server with some echo functionality:
```js
server.on('connection', function (socket) {
socket.on('message', function (message) {
message = JSON.parse(message)
if (message.type === 'echo') {
socket.send(message.data) // send back the user's message
}
})
})
```
`socket.send(number)` called on the server, will disclose server memory.
Here's [the release](https://github.com/websockets/ws/releases/tag/1.0.1) where the issue
was fixed, with a more detailed explanation. Props to
[Arnout Kazemier](https://github.com/3rd-Eden) for the quick fix. Here's the
[Node Security Project disclosure](https://nodesecurity.io/advisories/67).
### What's the solution?
It's important that node.js offers a fast way to get memory otherwise performance-critical
applications would needlessly get a lot slower.
But we need a better way to *signal our intent* as programmers. **When we want
uninitialized memory, we should request it explicitly.**
Sensitive functionality should not be packed into a developer-friendly API that loosely
accepts many different types. This type of API encourages the lazy practice of passing
variables in without checking the type very carefully.
#### A new API: `Buffer.allocUnsafe(number)`
The functionality of creating buffers with uninitialized memory should be part of another
API. We propose `Buffer.allocUnsafe(number)`. This way, it's not part of an API that
frequently gets user input of all sorts of different types passed into it.
```js
var buf = Buffer.allocUnsafe(16) // careful, uninitialized memory!
// Immediately overwrite the uninitialized buffer with data from another buffer
for (var i = 0; i < buf.length; i++) {
buf[i] = otherBuf[i]
}
```
### How do we fix node.js core?
We sent [a PR to node.js core](https://github.com/nodejs/node/pull/4514) (merged as
`semver-major`) which defends against one case:
```js
var str = 16
new Buffer(str, 'utf8')
```
In this situation, it's implied that the programmer intended the first argument to be a
string, since they passed an encoding as a second argument. Today, node.js will allocate
uninitialized memory in the case of `new Buffer(number, encoding)`, which is probably not
what the programmer intended.
But this is only a partial solution, since if the programmer does `new Buffer(variable)`
(without an `encoding` parameter) there's no way to know what they intended. If `variable`
is sometimes a number, then uninitialized memory will sometimes be returned.
### What's the real long-term fix?
We could deprecate and remove `new Buffer(number)` and use `Buffer.allocUnsafe(number)` when
we need uninitialized memory. But that would break 1000s of packages.
~~We believe the best solution is to:~~
~~1. Change `new Buffer(number)` to return safe, zeroed-out memory~~
~~2. Create a new API for creating uninitialized Buffers. We propose: `Buffer.allocUnsafe(number)`~~
#### Update
We now support adding three new APIs:
- `Buffer.from(value)` - convert from any type to a buffer
- `Buffer.alloc(size)` - create a zero-filled buffer
- `Buffer.allocUnsafe(size)` - create an uninitialized buffer with given size
This solves the core problem that affected `ws` and `bittorrent-dht` which is
`Buffer(variable)` getting tricked into taking a number argument.
This way, existing code continues working and the impact on the npm ecosystem will be
minimal. Over time, npm maintainers can migrate performance-critical code to use
`Buffer.allocUnsafe(number)` instead of `new Buffer(number)`.
### Conclusion
We think there's a serious design issue with the `Buffer` API as it exists today. It
promotes insecure software by putting high-risk functionality into a convenient API
with friendly "developer ergonomics".
This wasn't merely a theoretical exercise because we found the issue in some of the
most popular npm packages.
Fortunately, there's an easy fix that can be applied today. Use `safe-buffer` in place of
`buffer`.
```js
var Buffer = require('safe-buffer').Buffer
```
Eventually, we hope that node.js core can switch to this new, safer behavior. We believe
the impact on the ecosystem would be minimal since it's not a breaking change.
Well-maintained, popular packages would be updated to use `Buffer.alloc` quickly, while
older, insecure packages would magically become safe from this attack vector.
## links
- [Node.js PR: buffer: throw if both length and enc are passed](https://github.com/nodejs/node/pull/4514)
- [Node Security Project disclosure for `ws`](https://nodesecurity.io/advisories/67)
- [Node Security Project disclosure for`bittorrent-dht`](https://nodesecurity.io/advisories/68)
## credit
The original issues in `bittorrent-dht`
([disclosure](https://nodesecurity.io/advisories/68)) and
`ws` ([disclosure](https://nodesecurity.io/advisories/67)) were discovered by
[Mathias Buus](https://github.com/mafintosh) and
[Feross Aboukhadijeh](http://feross.org/).
Thanks to [Adam Baldwin](https://github.com/evilpacket) for helping disclose these issues
and for his work running the [Node Security Project](https://nodesecurity.io/).
Thanks to [John Hiesey](https://github.com/jhiesey) for proofreading this README and
auditing the code.
## license
MIT. Copyright (C) [Feross Aboukhadijeh](http://feross.org)

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declare module "safe-buffer" {
export class Buffer {
length: number
write(string: string, offset?: number, length?: number, encoding?: string): number;
toString(encoding?: string, start?: number, end?: number): string;
toJSON(): { type: 'Buffer', data: any[] };
equals(otherBuffer: Buffer): boolean;
compare(otherBuffer: Buffer, targetStart?: number, targetEnd?: number, sourceStart?: number, sourceEnd?: number): number;
copy(targetBuffer: Buffer, targetStart?: number, sourceStart?: number, sourceEnd?: number): number;
slice(start?: number, end?: number): Buffer;
writeUIntLE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
writeUIntBE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
writeIntLE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
writeIntBE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
readUIntLE(offset: number, byteLength: number, noAssert?: boolean): number;
readUIntBE(offset: number, byteLength: number, noAssert?: boolean): number;
readIntLE(offset: number, byteLength: number, noAssert?: boolean): number;
readIntBE(offset: number, byteLength: number, noAssert?: boolean): number;
readUInt8(offset: number, noAssert?: boolean): number;
readUInt16LE(offset: number, noAssert?: boolean): number;
readUInt16BE(offset: number, noAssert?: boolean): number;
readUInt32LE(offset: number, noAssert?: boolean): number;
readUInt32BE(offset: number, noAssert?: boolean): number;
readInt8(offset: number, noAssert?: boolean): number;
readInt16LE(offset: number, noAssert?: boolean): number;
readInt16BE(offset: number, noAssert?: boolean): number;
readInt32LE(offset: number, noAssert?: boolean): number;
readInt32BE(offset: number, noAssert?: boolean): number;
readFloatLE(offset: number, noAssert?: boolean): number;
readFloatBE(offset: number, noAssert?: boolean): number;
readDoubleLE(offset: number, noAssert?: boolean): number;
readDoubleBE(offset: number, noAssert?: boolean): number;
swap16(): Buffer;
swap32(): Buffer;
swap64(): Buffer;
writeUInt8(value: number, offset: number, noAssert?: boolean): number;
writeUInt16LE(value: number, offset: number, noAssert?: boolean): number;
writeUInt16BE(value: number, offset: number, noAssert?: boolean): number;
writeUInt32LE(value: number, offset: number, noAssert?: boolean): number;
writeUInt32BE(value: number, offset: number, noAssert?: boolean): number;
writeInt8(value: number, offset: number, noAssert?: boolean): number;
writeInt16LE(value: number, offset: number, noAssert?: boolean): number;
writeInt16BE(value: number, offset: number, noAssert?: boolean): number;
writeInt32LE(value: number, offset: number, noAssert?: boolean): number;
writeInt32BE(value: number, offset: number, noAssert?: boolean): number;
writeFloatLE(value: number, offset: number, noAssert?: boolean): number;
writeFloatBE(value: number, offset: number, noAssert?: boolean): number;
writeDoubleLE(value: number, offset: number, noAssert?: boolean): number;
writeDoubleBE(value: number, offset: number, noAssert?: boolean): number;
fill(value: any, offset?: number, end?: number): this;
indexOf(value: string | number | Buffer, byteOffset?: number, encoding?: string): number;
lastIndexOf(value: string | number | Buffer, byteOffset?: number, encoding?: string): number;
includes(value: string | number | Buffer, byteOffset?: number, encoding?: string): boolean;
/**
* Allocates a new buffer containing the given {str}.
*
* @param str String to store in buffer.
* @param encoding encoding to use, optional. Default is 'utf8'
*/
constructor (str: string, encoding?: string);
/**
* Allocates a new buffer of {size} octets.
*
* @param size count of octets to allocate.
*/
constructor (size: number);
/**
* Allocates a new buffer containing the given {array} of octets.
*
* @param array The octets to store.
*/
constructor (array: Uint8Array);
/**
* Produces a Buffer backed by the same allocated memory as
* the given {ArrayBuffer}.
*
*
* @param arrayBuffer The ArrayBuffer with which to share memory.
*/
constructor (arrayBuffer: ArrayBuffer);
/**
* Allocates a new buffer containing the given {array} of octets.
*
* @param array The octets to store.
*/
constructor (array: any[]);
/**
* Copies the passed {buffer} data onto a new {Buffer} instance.
*
* @param buffer The buffer to copy.
*/
constructor (buffer: Buffer);
prototype: Buffer;
/**
* Allocates a new Buffer using an {array} of octets.
*
* @param array
*/
static from(array: any[]): Buffer;
/**
* When passed a reference to the .buffer property of a TypedArray instance,
* the newly created Buffer will share the same allocated memory as the TypedArray.
* The optional {byteOffset} and {length} arguments specify a memory range
* within the {arrayBuffer} that will be shared by the Buffer.
*
* @param arrayBuffer The .buffer property of a TypedArray or a new ArrayBuffer()
* @param byteOffset
* @param length
*/
static from(arrayBuffer: ArrayBuffer, byteOffset?: number, length?: number): Buffer;
/**
* Copies the passed {buffer} data onto a new Buffer instance.
*
* @param buffer
*/
static from(buffer: Buffer): Buffer;
/**
* Creates a new Buffer containing the given JavaScript string {str}.
* If provided, the {encoding} parameter identifies the character encoding.
* If not provided, {encoding} defaults to 'utf8'.
*
* @param str
*/
static from(str: string, encoding?: string): Buffer;
/**
* Returns true if {obj} is a Buffer
*
* @param obj object to test.
*/
static isBuffer(obj: any): obj is Buffer;
/**
* Returns true if {encoding} is a valid encoding argument.
* Valid string encodings in Node 0.12: 'ascii'|'utf8'|'utf16le'|'ucs2'(alias of 'utf16le')|'base64'|'binary'(deprecated)|'hex'
*
* @param encoding string to test.
*/
static isEncoding(encoding: string): boolean;
/**
* Gives the actual byte length of a string. encoding defaults to 'utf8'.
* This is not the same as String.prototype.length since that returns the number of characters in a string.
*
* @param string string to test.
* @param encoding encoding used to evaluate (defaults to 'utf8')
*/
static byteLength(string: string, encoding?: string): number;
/**
* Returns a buffer which is the result of concatenating all the buffers in the list together.
*
* If the list has no items, or if the totalLength is 0, then it returns a zero-length buffer.
* If the list has exactly one item, then the first item of the list is returned.
* If the list has more than one item, then a new Buffer is created.
*
* @param list An array of Buffer objects to concatenate
* @param totalLength Total length of the buffers when concatenated.
* If totalLength is not provided, it is read from the buffers in the list. However, this adds an additional loop to the function, so it is faster to provide the length explicitly.
*/
static concat(list: Buffer[], totalLength?: number): Buffer;
/**
* The same as buf1.compare(buf2).
*/
static compare(buf1: Buffer, buf2: Buffer): number;
/**
* Allocates a new buffer of {size} octets.
*
* @param size count of octets to allocate.
* @param fill if specified, buffer will be initialized by calling buf.fill(fill).
* If parameter is omitted, buffer will be filled with zeros.
* @param encoding encoding used for call to buf.fill while initalizing
*/
static alloc(size: number, fill?: string | Buffer | number, encoding?: string): Buffer;
/**
* Allocates a new buffer of {size} octets, leaving memory not initialized, so the contents
* of the newly created Buffer are unknown and may contain sensitive data.
*
* @param size count of octets to allocate
*/
static allocUnsafe(size: number): Buffer;
/**
* Allocates a new non-pooled buffer of {size} octets, leaving memory not initialized, so the contents
* of the newly created Buffer are unknown and may contain sensitive data.
*
* @param size count of octets to allocate
*/
static allocUnsafeSlow(size: number): Buffer;
}
}

62
nodered/rootfs/data/node_modules/compression/node_modules/safe-buffer/index.js generated vendored Normal file
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/* eslint-disable node/no-deprecated-api */
var buffer = require('buffer')
var Buffer = buffer.Buffer
// alternative to using Object.keys for old browsers
function copyProps (src, dst) {
for (var key in src) {
dst[key] = src[key]
}
}
if (Buffer.from && Buffer.alloc && Buffer.allocUnsafe && Buffer.allocUnsafeSlow) {
module.exports = buffer
} else {
// Copy properties from require('buffer')
copyProps(buffer, exports)
exports.Buffer = SafeBuffer
}
function SafeBuffer (arg, encodingOrOffset, length) {
return Buffer(arg, encodingOrOffset, length)
}
// Copy static methods from Buffer
copyProps(Buffer, SafeBuffer)
SafeBuffer.from = function (arg, encodingOrOffset, length) {
if (typeof arg === 'number') {
throw new TypeError('Argument must not be a number')
}
return Buffer(arg, encodingOrOffset, length)
}
SafeBuffer.alloc = function (size, fill, encoding) {
if (typeof size !== 'number') {
throw new TypeError('Argument must be a number')
}
var buf = Buffer(size)
if (fill !== undefined) {
if (typeof encoding === 'string') {
buf.fill(fill, encoding)
} else {
buf.fill(fill)
}
} else {
buf.fill(0)
}
return buf
}
SafeBuffer.allocUnsafe = function (size) {
if (typeof size !== 'number') {
throw new TypeError('Argument must be a number')
}
return Buffer(size)
}
SafeBuffer.allocUnsafeSlow = function (size) {
if (typeof size !== 'number') {
throw new TypeError('Argument must be a number')
}
return buffer.SlowBuffer(size)
}

62
nodered/rootfs/data/node_modules/compression/node_modules/safe-buffer/package.json generated vendored Normal file
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{
"_from": "safe-buffer@5.1.2",
"_id": "safe-buffer@5.1.2",
"_inBundle": false,
"_integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
"_location": "/compression/safe-buffer",
"_phantomChildren": {},
"_requested": {
"type": "version",
"registry": true,
"raw": "safe-buffer@5.1.2",
"name": "safe-buffer",
"escapedName": "safe-buffer",
"rawSpec": "5.1.2",
"saveSpec": null,
"fetchSpec": "5.1.2"
},
"_requiredBy": [
"/compression"
],
"_resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
"_shasum": "991ec69d296e0313747d59bdfd2b745c35f8828d",
"_spec": "safe-buffer@5.1.2",
"_where": "/data/node_modules/compression",
"author": {
"name": "Feross Aboukhadijeh",
"email": "feross@feross.org",
"url": "http://feross.org"
},
"bugs": {
"url": "https://github.com/feross/safe-buffer/issues"
},
"bundleDependencies": false,
"deprecated": false,
"description": "Safer Node.js Buffer API",
"devDependencies": {
"standard": "*",
"tape": "^4.0.0"
},
"homepage": "https://github.com/feross/safe-buffer",
"keywords": [
"buffer",
"buffer allocate",
"node security",
"safe",
"safe-buffer",
"security",
"uninitialized"
],
"license": "MIT",
"main": "index.js",
"name": "safe-buffer",
"repository": {
"type": "git",
"url": "git://github.com/feross/safe-buffer.git"
},
"scripts": {
"test": "standard && tape test/*.js"
},
"types": "index.d.ts",
"version": "5.1.2"
}

86
nodered/rootfs/data/node_modules/compression/package.json generated vendored Normal file
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{
"_from": "compression@^1.7.4",
"_id": "compression@1.7.4",
"_inBundle": false,
"_integrity": "sha512-jaSIDzP9pZVS4ZfQ+TzvtiWhdpFhE2RDHz8QJkpX9SIpLq88VueF5jJw6t+6CUQcAoA6t+x89MLrWAqpfDE8iQ==",
"_location": "/compression",
"_phantomChildren": {},
"_requested": {
"type": "range",
"registry": true,
"raw": "compression@^1.7.4",
"name": "compression",
"escapedName": "compression",
"rawSpec": "^1.7.4",
"saveSpec": null,
"fetchSpec": "^1.7.4"
},
"_requiredBy": [
"/node-red-dashboard"
],
"_resolved": "https://registry.npmjs.org/compression/-/compression-1.7.4.tgz",
"_shasum": "95523eff170ca57c29a0ca41e6fe131f41e5bb8f",
"_spec": "compression@^1.7.4",
"_where": "/data/node_modules/node-red-dashboard",
"bugs": {
"url": "https://github.com/expressjs/compression/issues"
},
"bundleDependencies": false,
"contributors": [
{
"name": "Douglas Christopher Wilson",
"email": "doug@somethingdoug.com"
},
{
"name": "Jonathan Ong",
"email": "me@jongleberry.com",
"url": "http://jongleberry.com"
}
],
"dependencies": {
"accepts": "~1.3.5",
"bytes": "3.0.0",
"compressible": "~2.0.16",
"debug": "2.6.9",
"on-headers": "~1.0.2",
"safe-buffer": "5.1.2",
"vary": "~1.1.2"
},
"deprecated": false,
"description": "Node.js compression middleware",
"devDependencies": {
"after": "0.8.2",
"eslint": "5.15.1",
"eslint-config-standard": "12.0.0",
"eslint-plugin-import": "2.16.0",
"eslint-plugin-markdown": "1.0.0",
"eslint-plugin-node": "7.0.1",
"eslint-plugin-promise": "4.0.1",
"eslint-plugin-standard": "4.0.0",
"istanbul": "0.4.5",
"mocha": "6.0.2",
"supertest": "4.0.0"
},
"engines": {
"node": ">= 0.8.0"
},
"files": [
"LICENSE",
"HISTORY.md",
"index.js"
],
"homepage": "https://github.com/expressjs/compression#readme",
"license": "MIT",
"name": "compression",
"repository": {
"type": "git",
"url": "git+https://github.com/expressjs/compression.git"
},
"scripts": {
"lint": "eslint --plugin markdown --ext js,md .",
"test": "mocha --check-leaks --reporter spec --bail",
"test-cov": "istanbul cover node_modules/mocha/bin/_mocha -- --check-leaks --reporter dot",
"test-travis": "istanbul cover node_modules/mocha/bin/_mocha --report lcovonly -- --check-leaks --reporter spec"
},
"version": "1.7.4"
}