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node_modules/proxy-addr/HISTORY.md generated vendored Normal file
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2.0.7 / 2021-05-31
==================
* deps: forwarded@0.2.0
- Use `req.socket` over deprecated `req.connection`
2.0.6 / 2020-02-24
==================
* deps: ipaddr.js@1.9.1
2.0.5 / 2019-04-16
==================
* deps: ipaddr.js@1.9.0
2.0.4 / 2018-07-26
==================
* deps: ipaddr.js@1.8.0
2.0.3 / 2018-02-19
==================
* deps: ipaddr.js@1.6.0
2.0.2 / 2017-09-24
==================
* deps: forwarded@~0.1.2
- perf: improve header parsing
- perf: reduce overhead when no `X-Forwarded-For` header
2.0.1 / 2017-09-10
==================
* deps: forwarded@~0.1.1
- Fix trimming leading / trailing OWS
- perf: hoist regular expression
* deps: ipaddr.js@1.5.2
2.0.0 / 2017-08-08
==================
* Drop support for Node.js below 0.10
1.1.5 / 2017-07-25
==================
* Fix array argument being altered
* deps: ipaddr.js@1.4.0
1.1.4 / 2017-03-24
==================
* deps: ipaddr.js@1.3.0
1.1.3 / 2017-01-14
==================
* deps: ipaddr.js@1.2.0
1.1.2 / 2016-05-29
==================
* deps: ipaddr.js@1.1.1
- Fix IPv6-mapped IPv4 validation edge cases
1.1.1 / 2016-05-03
==================
* Fix regression matching mixed versions against multiple subnets
1.1.0 / 2016-05-01
==================
* Fix accepting various invalid netmasks
- IPv4 netmasks must be contingous
- IPv6 addresses cannot be used as a netmask
* deps: ipaddr.js@1.1.0
1.0.10 / 2015-12-09
===================
* deps: ipaddr.js@1.0.5
- Fix regression in `isValid` with non-string arguments
1.0.9 / 2015-12-01
==================
* deps: ipaddr.js@1.0.4
- Fix accepting some invalid IPv6 addresses
- Reject CIDRs with negative or overlong masks
* perf: enable strict mode
1.0.8 / 2015-05-10
==================
* deps: ipaddr.js@1.0.1
1.0.7 / 2015-03-16
==================
* deps: ipaddr.js@0.1.9
- Fix OOM on certain inputs to `isValid`
1.0.6 / 2015-02-01
==================
* deps: ipaddr.js@0.1.8
1.0.5 / 2015-01-08
==================
* deps: ipaddr.js@0.1.6
1.0.4 / 2014-11-23
==================
* deps: ipaddr.js@0.1.5
- Fix edge cases with `isValid`
1.0.3 / 2014-09-21
==================
* Use `forwarded` npm module
1.0.2 / 2014-09-18
==================
* Fix a global leak when multiple subnets are trusted
* Support Node.js 0.6
* deps: ipaddr.js@0.1.3
1.0.1 / 2014-06-03
==================
* Fix links in npm package
1.0.0 / 2014-05-08
==================
* Add `trust` argument to determine proxy trust on
* Accepts custom function
* Accepts IPv4/IPv6 address(es)
* Accepts subnets
* Accepts pre-defined names
* Add optional `trust` argument to `proxyaddr.all` to
stop at first untrusted
* Add `proxyaddr.compile` to pre-compile `trust` function
to make subsequent calls faster
0.0.1 / 2014-05-04
==================
* Fix bad npm publish
0.0.0 / 2014-05-04
==================
* Initial release

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(The MIT License)
Copyright (c) 2014-2016 Douglas Christopher Wilson
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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# proxy-addr
[![NPM Version][npm-version-image]][npm-url]
[![NPM Downloads][npm-downloads-image]][npm-url]
[![Node.js Version][node-image]][node-url]
[![Build Status][ci-image]][ci-url]
[![Test Coverage][coveralls-image]][coveralls-url]
Determine address of proxied request
## 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):
```sh
$ npm install proxy-addr
```
## API
```js
var proxyaddr = require('proxy-addr')
```
### proxyaddr(req, trust)
Return the address of the request, using the given `trust` parameter.
The `trust` argument is a function that returns `true` if you trust
the address, `false` if you don't. The closest untrusted address is
returned.
```js
proxyaddr(req, function (addr) { return addr === '127.0.0.1' })
proxyaddr(req, function (addr, i) { return i < 1 })
```
The `trust` arugment may also be a single IP address string or an
array of trusted addresses, as plain IP addresses, CIDR-formatted
strings, or IP/netmask strings.
```js
proxyaddr(req, '127.0.0.1')
proxyaddr(req, ['127.0.0.0/8', '10.0.0.0/8'])
proxyaddr(req, ['127.0.0.0/255.0.0.0', '192.168.0.0/255.255.0.0'])
```
This module also supports IPv6. Your IPv6 addresses will be normalized
automatically (i.e. `fe80::00ed:1` equals `fe80:0:0:0:0:0:ed:1`).
```js
proxyaddr(req, '::1')
proxyaddr(req, ['::1/128', 'fe80::/10'])
```
This module will automatically work with IPv4-mapped IPv6 addresses
as well to support node.js in IPv6-only mode. This means that you do
not have to specify both `::ffff:a00:1` and `10.0.0.1`.
As a convenience, this module also takes certain pre-defined names
in addition to IP addresses, which expand into IP addresses:
```js
proxyaddr(req, 'loopback')
proxyaddr(req, ['loopback', 'fc00:ac:1ab5:fff::1/64'])
```
* `loopback`: IPv4 and IPv6 loopback addresses (like `::1` and
`127.0.0.1`).
* `linklocal`: IPv4 and IPv6 link-local addresses (like
`fe80::1:1:1:1` and `169.254.0.1`).
* `uniquelocal`: IPv4 private addresses and IPv6 unique-local
addresses (like `fc00:ac:1ab5:fff::1` and `192.168.0.1`).
When `trust` is specified as a function, it will be called for each
address to determine if it is a trusted address. The function is
given two arguments: `addr` and `i`, where `addr` is a string of
the address to check and `i` is a number that represents the distance
from the socket address.
### proxyaddr.all(req, [trust])
Return all the addresses of the request, optionally stopping at the
first untrusted. This array is ordered from closest to furthest
(i.e. `arr[0] === req.connection.remoteAddress`).
```js
proxyaddr.all(req)
```
The optional `trust` argument takes the same arguments as `trust`
does in `proxyaddr(req, trust)`.
```js
proxyaddr.all(req, 'loopback')
```
### proxyaddr.compile(val)
Compiles argument `val` into a `trust` function. This function takes
the same arguments as `trust` does in `proxyaddr(req, trust)` and
returns a function suitable for `proxyaddr(req, trust)`.
```js
var trust = proxyaddr.compile('loopback')
var addr = proxyaddr(req, trust)
```
This function is meant to be optimized for use against every request.
It is recommend to compile a trust function up-front for the trusted
configuration and pass that to `proxyaddr(req, trust)` for each request.
## Testing
```sh
$ npm test
```
## Benchmarks
```sh
$ npm run-script bench
```
## License
[MIT](LICENSE)
[ci-image]: https://badgen.net/github/checks/jshttp/proxy-addr/master?label=ci
[ci-url]: https://github.com/jshttp/proxy-addr/actions?query=workflow%3Aci
[coveralls-image]: https://badgen.net/coveralls/c/github/jshttp/proxy-addr/master
[coveralls-url]: https://coveralls.io/r/jshttp/proxy-addr?branch=master
[node-image]: https://badgen.net/npm/node/proxy-addr
[node-url]: https://nodejs.org/en/download
[npm-downloads-image]: https://badgen.net/npm/dm/proxy-addr
[npm-url]: https://npmjs.org/package/proxy-addr
[npm-version-image]: https://badgen.net/npm/v/proxy-addr

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/*!
* proxy-addr
* Copyright(c) 2014-2016 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict'
/**
* Module exports.
* @public
*/
module.exports = proxyaddr
module.exports.all = alladdrs
module.exports.compile = compile
/**
* Module dependencies.
* @private
*/
var forwarded = require('forwarded')
var ipaddr = require('ipaddr.js')
/**
* Variables.
* @private
*/
var DIGIT_REGEXP = /^[0-9]+$/
var isip = ipaddr.isValid
var parseip = ipaddr.parse
/**
* Pre-defined IP ranges.
* @private
*/
var IP_RANGES = {
linklocal: ['169.254.0.0/16', 'fe80::/10'],
loopback: ['127.0.0.1/8', '::1/128'],
uniquelocal: ['10.0.0.0/8', '172.16.0.0/12', '192.168.0.0/16', 'fc00::/7']
}
/**
* Get all addresses in the request, optionally stopping
* at the first untrusted.
*
* @param {Object} request
* @param {Function|Array|String} [trust]
* @public
*/
function alladdrs (req, trust) {
// get addresses
var addrs = forwarded(req)
if (!trust) {
// Return all addresses
return addrs
}
if (typeof trust !== 'function') {
trust = compile(trust)
}
for (var i = 0; i < addrs.length - 1; i++) {
if (trust(addrs[i], i)) continue
addrs.length = i + 1
}
return addrs
}
/**
* Compile argument into trust function.
*
* @param {Array|String} val
* @private
*/
function compile (val) {
if (!val) {
throw new TypeError('argument is required')
}
var trust
if (typeof val === 'string') {
trust = [val]
} else if (Array.isArray(val)) {
trust = val.slice()
} else {
throw new TypeError('unsupported trust argument')
}
for (var i = 0; i < trust.length; i++) {
val = trust[i]
if (!Object.prototype.hasOwnProperty.call(IP_RANGES, val)) {
continue
}
// Splice in pre-defined range
val = IP_RANGES[val]
trust.splice.apply(trust, [i, 1].concat(val))
i += val.length - 1
}
return compileTrust(compileRangeSubnets(trust))
}
/**
* Compile `arr` elements into range subnets.
*
* @param {Array} arr
* @private
*/
function compileRangeSubnets (arr) {
var rangeSubnets = new Array(arr.length)
for (var i = 0; i < arr.length; i++) {
rangeSubnets[i] = parseipNotation(arr[i])
}
return rangeSubnets
}
/**
* Compile range subnet array into trust function.
*
* @param {Array} rangeSubnets
* @private
*/
function compileTrust (rangeSubnets) {
// Return optimized function based on length
var len = rangeSubnets.length
return len === 0
? trustNone
: len === 1
? trustSingle(rangeSubnets[0])
: trustMulti(rangeSubnets)
}
/**
* Parse IP notation string into range subnet.
*
* @param {String} note
* @private
*/
function parseipNotation (note) {
var pos = note.lastIndexOf('/')
var str = pos !== -1
? note.substring(0, pos)
: note
if (!isip(str)) {
throw new TypeError('invalid IP address: ' + str)
}
var ip = parseip(str)
if (pos === -1 && ip.kind() === 'ipv6' && ip.isIPv4MappedAddress()) {
// Store as IPv4
ip = ip.toIPv4Address()
}
var max = ip.kind() === 'ipv6'
? 128
: 32
var range = pos !== -1
? note.substring(pos + 1, note.length)
: null
if (range === null) {
range = max
} else if (DIGIT_REGEXP.test(range)) {
range = parseInt(range, 10)
} else if (ip.kind() === 'ipv4' && isip(range)) {
range = parseNetmask(range)
} else {
range = null
}
if (range <= 0 || range > max) {
throw new TypeError('invalid range on address: ' + note)
}
return [ip, range]
}
/**
* Parse netmask string into CIDR range.
*
* @param {String} netmask
* @private
*/
function parseNetmask (netmask) {
var ip = parseip(netmask)
var kind = ip.kind()
return kind === 'ipv4'
? ip.prefixLengthFromSubnetMask()
: null
}
/**
* Determine address of proxied request.
*
* @param {Object} request
* @param {Function|Array|String} trust
* @public
*/
function proxyaddr (req, trust) {
if (!req) {
throw new TypeError('req argument is required')
}
if (!trust) {
throw new TypeError('trust argument is required')
}
var addrs = alladdrs(req, trust)
var addr = addrs[addrs.length - 1]
return addr
}
/**
* Static trust function to trust nothing.
*
* @private
*/
function trustNone () {
return false
}
/**
* Compile trust function for multiple subnets.
*
* @param {Array} subnets
* @private
*/
function trustMulti (subnets) {
return function trust (addr) {
if (!isip(addr)) return false
var ip = parseip(addr)
var ipconv
var kind = ip.kind()
for (var i = 0; i < subnets.length; i++) {
var subnet = subnets[i]
var subnetip = subnet[0]
var subnetkind = subnetip.kind()
var subnetrange = subnet[1]
var trusted = ip
if (kind !== subnetkind) {
if (subnetkind === 'ipv4' && !ip.isIPv4MappedAddress()) {
// Incompatible IP addresses
continue
}
if (!ipconv) {
// Convert IP to match subnet IP kind
ipconv = subnetkind === 'ipv4'
? ip.toIPv4Address()
: ip.toIPv4MappedAddress()
}
trusted = ipconv
}
if (trusted.match(subnetip, subnetrange)) {
return true
}
}
return false
}
}
/**
* Compile trust function for single subnet.
*
* @param {Object} subnet
* @private
*/
function trustSingle (subnet) {
var subnetip = subnet[0]
var subnetkind = subnetip.kind()
var subnetisipv4 = subnetkind === 'ipv4'
var subnetrange = subnet[1]
return function trust (addr) {
if (!isip(addr)) return false
var ip = parseip(addr)
var kind = ip.kind()
if (kind !== subnetkind) {
if (subnetisipv4 && !ip.isIPv4MappedAddress()) {
// Incompatible IP addresses
return false
}
// Convert IP to match subnet IP kind
ip = subnetisipv4
? ip.toIPv4Address()
: ip.toIPv4MappedAddress()
}
return ip.match(subnetip, subnetrange)
}
}

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{
"name": "proxy-addr",
"description": "Determine address of proxied request",
"version": "2.0.7",
"author": "Douglas Christopher Wilson <doug@somethingdoug.com>",
"license": "MIT",
"keywords": [
"ip",
"proxy",
"x-forwarded-for"
],
"repository": "jshttp/proxy-addr",
"dependencies": {
"forwarded": "0.2.0",
"ipaddr.js": "1.9.1"
},
"devDependencies": {
"benchmark": "2.1.4",
"beautify-benchmark": "0.2.4",
"deep-equal": "1.0.1",
"eslint": "7.26.0",
"eslint-config-standard": "14.1.1",
"eslint-plugin-import": "2.23.4",
"eslint-plugin-markdown": "2.2.0",
"eslint-plugin-node": "11.1.0",
"eslint-plugin-promise": "4.3.1",
"eslint-plugin-standard": "4.1.0",
"mocha": "8.4.0",
"nyc": "15.1.0"
},
"files": [
"LICENSE",
"HISTORY.md",
"README.md",
"index.js"
],
"engines": {
"node": ">= 0.10"
},
"scripts": {
"bench": "node benchmark/index.js",
"lint": "eslint .",
"test": "mocha --reporter spec --bail --check-leaks test/",
"test-ci": "nyc --reporter=lcov --reporter=text npm test",
"test-cov": "nyc --reporter=html --reporter=text npm test"
}
}