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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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Copyright (C) 2011-2017 whitequark <whitequark@whitequark.org>
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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# ipaddr.js — an IPv6 and IPv4 address manipulation library [![Build Status](https://travis-ci.org/whitequark/ipaddr.js.svg)](https://travis-ci.org/whitequark/ipaddr.js)
ipaddr.js is a small (1.9K minified and gzipped) library for manipulating
IP addresses in JavaScript environments. It runs on both CommonJS runtimes
(e.g. [nodejs]) and in a web browser.
ipaddr.js allows you to verify and parse string representation of an IP
address, match it against a CIDR range or range list, determine if it falls
into some reserved ranges (examples include loopback and private ranges),
and convert between IPv4 and IPv4-mapped IPv6 addresses.
[nodejs]: http://nodejs.org
## Installation
`npm install ipaddr.js`
or
`bower install ipaddr.js`
## API
ipaddr.js defines one object in the global scope: `ipaddr`. In CommonJS,
it is exported from the module:
```js
var ipaddr = require('ipaddr.js');
```
The API consists of several global methods and two classes: ipaddr.IPv6 and ipaddr.IPv4.
### Global methods
There are three global methods defined: `ipaddr.isValid`, `ipaddr.parse` and
`ipaddr.process`. All of them receive a string as a single parameter.
The `ipaddr.isValid` method returns `true` if the address is a valid IPv4 or
IPv6 address, and `false` otherwise. It does not throw any exceptions.
The `ipaddr.parse` method returns an object representing the IP address,
or throws an `Error` if the passed string is not a valid representation of an
IP address.
The `ipaddr.process` method works just like the `ipaddr.parse` one, but it
automatically converts IPv4-mapped IPv6 addresses to their IPv4 counterparts
before returning. It is useful when you have a Node.js instance listening
on an IPv6 socket, and the `net.ivp6.bindv6only` sysctl parameter (or its
equivalent on non-Linux OS) is set to 0. In this case, you can accept IPv4
connections on your IPv6-only socket, but the remote address will be mangled.
Use `ipaddr.process` method to automatically demangle it.
### Object representation
Parsing methods return an object which descends from `ipaddr.IPv6` or
`ipaddr.IPv4`. These objects share some properties, but most of them differ.
#### Shared properties
One can determine the type of address by calling `addr.kind()`. It will return
either `"ipv6"` or `"ipv4"`.
An address can be converted back to its string representation with `addr.toString()`.
Note that this method:
* does not return the original string used to create the object (in fact, there is
no way of getting that string)
* returns a compact representation (when it is applicable)
A `match(range, bits)` method can be used to check if the address falls into a
certain CIDR range.
Note that an address can be (obviously) matched only against an address of the same type.
For example:
```js
var addr = ipaddr.parse("2001:db8:1234::1");
var range = ipaddr.parse("2001:db8::");
addr.match(range, 32); // => true
```
Alternatively, `match` can also be called as `match([range, bits])`. In this way,
it can be used together with the `parseCIDR(string)` method, which parses an IP
address together with a CIDR range.
For example:
```js
var addr = ipaddr.parse("2001:db8:1234::1");
addr.match(ipaddr.parseCIDR("2001:db8::/32")); // => true
```
A `range()` method returns one of predefined names for several special ranges defined
by IP protocols. The exact names (and their respective CIDR ranges) can be looked up
in the source: [IPv6 ranges] and [IPv4 ranges]. Some common ones include `"unicast"`
(the default one) and `"reserved"`.
You can match against your own range list by using
`ipaddr.subnetMatch(address, rangeList, defaultName)` method. It can work with a mix of IPv6 or IPv4 addresses, and accepts a name-to-subnet map as the range list. For example:
```js
var rangeList = {
documentationOnly: [ ipaddr.parse('2001:db8::'), 32 ],
tunnelProviders: [
[ ipaddr.parse('2001:470::'), 32 ], // he.net
[ ipaddr.parse('2001:5c0::'), 32 ] // freenet6
]
};
ipaddr.subnetMatch(ipaddr.parse('2001:470:8:66::1'), rangeList, 'unknown'); // => "tunnelProviders"
```
The addresses can be converted to their byte representation with `toByteArray()`.
(Actually, JavaScript mostly does not know about byte buffers. They are emulated with
arrays of numbers, each in range of 0..255.)
```js
var bytes = ipaddr.parse('2a00:1450:8007::68').toByteArray(); // ipv6.google.com
bytes // => [42, 0x00, 0x14, 0x50, 0x80, 0x07, 0x00, <zeroes...>, 0x00, 0x68 ]
```
The `ipaddr.IPv4` and `ipaddr.IPv6` objects have some methods defined, too. All of them
have the same interface for both protocols, and are similar to global methods.
`ipaddr.IPvX.isValid(string)` can be used to check if the string is a valid address
for particular protocol, and `ipaddr.IPvX.parse(string)` is the error-throwing parser.
`ipaddr.IPvX.isValid(string)` uses the same format for parsing as the POSIX `inet_ntoa` function, which accepts unusual formats like `0xc0.168.1.1` or `0x10000000`. The function `ipaddr.IPv4.isValidFourPartDecimal(string)` validates the IPv4 address and also ensures that it is written in four-part decimal format.
[IPv6 ranges]: https://github.com/whitequark/ipaddr.js/blob/master/src/ipaddr.coffee#L186
[IPv4 ranges]: https://github.com/whitequark/ipaddr.js/blob/master/src/ipaddr.coffee#L71
#### IPv6 properties
Sometimes you will want to convert IPv6 not to a compact string representation (with
the `::` substitution); the `toNormalizedString()` method will return an address where
all zeroes are explicit.
For example:
```js
var addr = ipaddr.parse("2001:0db8::0001");
addr.toString(); // => "2001:db8::1"
addr.toNormalizedString(); // => "2001:db8:0:0:0:0:0:1"
```
The `isIPv4MappedAddress()` method will return `true` if this address is an IPv4-mapped
one, and `toIPv4Address()` will return an IPv4 object address.
To access the underlying binary representation of the address, use `addr.parts`.
```js
var addr = ipaddr.parse("2001:db8:10::1234:DEAD");
addr.parts // => [0x2001, 0xdb8, 0x10, 0, 0, 0, 0x1234, 0xdead]
```
A IPv6 zone index can be accessed via `addr.zoneId`:
```js
var addr = ipaddr.parse("2001:db8::%eth0");
addr.zoneId // => 'eth0'
```
#### IPv4 properties
`toIPv4MappedAddress()` will return a corresponding IPv4-mapped IPv6 address.
To access the underlying representation of the address, use `addr.octets`.
```js
var addr = ipaddr.parse("192.168.1.1");
addr.octets // => [192, 168, 1, 1]
```
`prefixLengthFromSubnetMask()` will return a CIDR prefix length for a valid IPv4 netmask or
null if the netmask is not valid.
```js
ipaddr.IPv4.parse('255.255.255.240').prefixLengthFromSubnetMask() == 28
ipaddr.IPv4.parse('255.192.164.0').prefixLengthFromSubnetMask() == null
```
`subnetMaskFromPrefixLength()` will return an IPv4 netmask for a valid CIDR prefix length.
```js
ipaddr.IPv4.subnetMaskFromPrefixLength(24) == "255.255.255.0"
ipaddr.IPv4.subnetMaskFromPrefixLength(29) == "255.255.255.248"
```
`broadcastAddressFromCIDR()` will return the broadcast address for a given IPv4 interface and netmask in CIDR notation.
```js
ipaddr.IPv4.broadcastAddressFromCIDR("172.0.0.1/24") == "172.0.0.255"
```
`networkAddressFromCIDR()` will return the network address for a given IPv4 interface and netmask in CIDR notation.
```js
ipaddr.IPv4.networkAddressFromCIDR("172.0.0.1/24") == "172.0.0.0"
```
#### Conversion
IPv4 and IPv6 can be converted bidirectionally to and from network byte order (MSB) byte arrays.
The `fromByteArray()` method will take an array and create an appropriate IPv4 or IPv6 object
if the input satisfies the requirements. For IPv4 it has to be an array of four 8-bit values,
while for IPv6 it has to be an array of sixteen 8-bit values.
For example:
```js
var addr = ipaddr.fromByteArray([0x7f, 0, 0, 1]);
addr.toString(); // => "127.0.0.1"
```
or
```js
var addr = ipaddr.fromByteArray([0x20, 1, 0xd, 0xb8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1])
addr.toString(); // => "2001:db8::1"
```
Both objects also offer a `toByteArray()` method, which returns an array in network byte order (MSB).
For example:
```js
var addr = ipaddr.parse("127.0.0.1");
addr.toByteArray(); // => [0x7f, 0, 0, 1]
```
or
```js
var addr = ipaddr.parse("2001:db8::1");
addr.toByteArray(); // => [0x20, 1, 0xd, 0xb8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1]
```

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(function() {
var expandIPv6, ipaddr, ipv4Part, ipv4Regexes, ipv6Part, ipv6Regexes, matchCIDR, root, zoneIndex;
ipaddr = {};
root = this;
if ((typeof module !== "undefined" && module !== null) && module.exports) {
module.exports = ipaddr;
} else {
root['ipaddr'] = ipaddr;
}
matchCIDR = function(first, second, partSize, cidrBits) {
var part, shift;
if (first.length !== second.length) {
throw new Error("ipaddr: cannot match CIDR for objects with different lengths");
}
part = 0;
while (cidrBits > 0) {
shift = partSize - cidrBits;
if (shift < 0) {
shift = 0;
}
if (first[part] >> shift !== second[part] >> shift) {
return false;
}
cidrBits -= partSize;
part += 1;
}
return true;
};
ipaddr.subnetMatch = function(address, rangeList, defaultName) {
var k, len, rangeName, rangeSubnets, subnet;
if (defaultName == null) {
defaultName = 'unicast';
}
for (rangeName in rangeList) {
rangeSubnets = rangeList[rangeName];
if (rangeSubnets[0] && !(rangeSubnets[0] instanceof Array)) {
rangeSubnets = [rangeSubnets];
}
for (k = 0, len = rangeSubnets.length; k < len; k++) {
subnet = rangeSubnets[k];
if (address.kind() === subnet[0].kind()) {
if (address.match.apply(address, subnet)) {
return rangeName;
}
}
}
}
return defaultName;
};
ipaddr.IPv4 = (function() {
function IPv4(octets) {
var k, len, octet;
if (octets.length !== 4) {
throw new Error("ipaddr: ipv4 octet count should be 4");
}
for (k = 0, len = octets.length; k < len; k++) {
octet = octets[k];
if (!((0 <= octet && octet <= 255))) {
throw new Error("ipaddr: ipv4 octet should fit in 8 bits");
}
}
this.octets = octets;
}
IPv4.prototype.kind = function() {
return 'ipv4';
};
IPv4.prototype.toString = function() {
return this.octets.join(".");
};
IPv4.prototype.toNormalizedString = function() {
return this.toString();
};
IPv4.prototype.toByteArray = function() {
return this.octets.slice(0);
};
IPv4.prototype.match = function(other, cidrRange) {
var ref;
if (cidrRange === void 0) {
ref = other, other = ref[0], cidrRange = ref[1];
}
if (other.kind() !== 'ipv4') {
throw new Error("ipaddr: cannot match ipv4 address with non-ipv4 one");
}
return matchCIDR(this.octets, other.octets, 8, cidrRange);
};
IPv4.prototype.SpecialRanges = {
unspecified: [[new IPv4([0, 0, 0, 0]), 8]],
broadcast: [[new IPv4([255, 255, 255, 255]), 32]],
multicast: [[new IPv4([224, 0, 0, 0]), 4]],
linkLocal: [[new IPv4([169, 254, 0, 0]), 16]],
loopback: [[new IPv4([127, 0, 0, 0]), 8]],
carrierGradeNat: [[new IPv4([100, 64, 0, 0]), 10]],
"private": [[new IPv4([10, 0, 0, 0]), 8], [new IPv4([172, 16, 0, 0]), 12], [new IPv4([192, 168, 0, 0]), 16]],
reserved: [[new IPv4([192, 0, 0, 0]), 24], [new IPv4([192, 0, 2, 0]), 24], [new IPv4([192, 88, 99, 0]), 24], [new IPv4([198, 51, 100, 0]), 24], [new IPv4([203, 0, 113, 0]), 24], [new IPv4([240, 0, 0, 0]), 4]]
};
IPv4.prototype.range = function() {
return ipaddr.subnetMatch(this, this.SpecialRanges);
};
IPv4.prototype.toIPv4MappedAddress = function() {
return ipaddr.IPv6.parse("::ffff:" + (this.toString()));
};
IPv4.prototype.prefixLengthFromSubnetMask = function() {
var cidr, i, k, octet, stop, zeros, zerotable;
zerotable = {
0: 8,
128: 7,
192: 6,
224: 5,
240: 4,
248: 3,
252: 2,
254: 1,
255: 0
};
cidr = 0;
stop = false;
for (i = k = 3; k >= 0; i = k += -1) {
octet = this.octets[i];
if (octet in zerotable) {
zeros = zerotable[octet];
if (stop && zeros !== 0) {
return null;
}
if (zeros !== 8) {
stop = true;
}
cidr += zeros;
} else {
return null;
}
}
return 32 - cidr;
};
return IPv4;
})();
ipv4Part = "(0?\\d+|0x[a-f0-9]+)";
ipv4Regexes = {
fourOctet: new RegExp("^" + ipv4Part + "\\." + ipv4Part + "\\." + ipv4Part + "\\." + ipv4Part + "$", 'i'),
longValue: new RegExp("^" + ipv4Part + "$", 'i')
};
ipaddr.IPv4.parser = function(string) {
var match, parseIntAuto, part, shift, value;
parseIntAuto = function(string) {
if (string[0] === "0" && string[1] !== "x") {
return parseInt(string, 8);
} else {
return parseInt(string);
}
};
if (match = string.match(ipv4Regexes.fourOctet)) {
return (function() {
var k, len, ref, results;
ref = match.slice(1, 6);
results = [];
for (k = 0, len = ref.length; k < len; k++) {
part = ref[k];
results.push(parseIntAuto(part));
}
return results;
})();
} else if (match = string.match(ipv4Regexes.longValue)) {
value = parseIntAuto(match[1]);
if (value > 0xffffffff || value < 0) {
throw new Error("ipaddr: address outside defined range");
}
return ((function() {
var k, results;
results = [];
for (shift = k = 0; k <= 24; shift = k += 8) {
results.push((value >> shift) & 0xff);
}
return results;
})()).reverse();
} else {
return null;
}
};
ipaddr.IPv6 = (function() {
function IPv6(parts, zoneId) {
var i, k, l, len, part, ref;
if (parts.length === 16) {
this.parts = [];
for (i = k = 0; k <= 14; i = k += 2) {
this.parts.push((parts[i] << 8) | parts[i + 1]);
}
} else if (parts.length === 8) {
this.parts = parts;
} else {
throw new Error("ipaddr: ipv6 part count should be 8 or 16");
}
ref = this.parts;
for (l = 0, len = ref.length; l < len; l++) {
part = ref[l];
if (!((0 <= part && part <= 0xffff))) {
throw new Error("ipaddr: ipv6 part should fit in 16 bits");
}
}
if (zoneId) {
this.zoneId = zoneId;
}
}
IPv6.prototype.kind = function() {
return 'ipv6';
};
IPv6.prototype.toString = function() {
return this.toNormalizedString().replace(/((^|:)(0(:|$))+)/, '::');
};
IPv6.prototype.toRFC5952String = function() {
var bestMatchIndex, bestMatchLength, match, regex, string;
regex = /((^|:)(0(:|$)){2,})/g;
string = this.toNormalizedString();
bestMatchIndex = 0;
bestMatchLength = -1;
while ((match = regex.exec(string))) {
if (match[0].length > bestMatchLength) {
bestMatchIndex = match.index;
bestMatchLength = match[0].length;
}
}
if (bestMatchLength < 0) {
return string;
}
return string.substring(0, bestMatchIndex) + '::' + string.substring(bestMatchIndex + bestMatchLength);
};
IPv6.prototype.toByteArray = function() {
var bytes, k, len, part, ref;
bytes = [];
ref = this.parts;
for (k = 0, len = ref.length; k < len; k++) {
part = ref[k];
bytes.push(part >> 8);
bytes.push(part & 0xff);
}
return bytes;
};
IPv6.prototype.toNormalizedString = function() {
var addr, part, suffix;
addr = ((function() {
var k, len, ref, results;
ref = this.parts;
results = [];
for (k = 0, len = ref.length; k < len; k++) {
part = ref[k];
results.push(part.toString(16));
}
return results;
}).call(this)).join(":");
suffix = '';
if (this.zoneId) {
suffix = '%' + this.zoneId;
}
return addr + suffix;
};
IPv6.prototype.toFixedLengthString = function() {
var addr, part, suffix;
addr = ((function() {
var k, len, ref, results;
ref = this.parts;
results = [];
for (k = 0, len = ref.length; k < len; k++) {
part = ref[k];
results.push(part.toString(16).padStart(4, '0'));
}
return results;
}).call(this)).join(":");
suffix = '';
if (this.zoneId) {
suffix = '%' + this.zoneId;
}
return addr + suffix;
};
IPv6.prototype.match = function(other, cidrRange) {
var ref;
if (cidrRange === void 0) {
ref = other, other = ref[0], cidrRange = ref[1];
}
if (other.kind() !== 'ipv6') {
throw new Error("ipaddr: cannot match ipv6 address with non-ipv6 one");
}
return matchCIDR(this.parts, other.parts, 16, cidrRange);
};
IPv6.prototype.SpecialRanges = {
unspecified: [new IPv6([0, 0, 0, 0, 0, 0, 0, 0]), 128],
linkLocal: [new IPv6([0xfe80, 0, 0, 0, 0, 0, 0, 0]), 10],
multicast: [new IPv6([0xff00, 0, 0, 0, 0, 0, 0, 0]), 8],
loopback: [new IPv6([0, 0, 0, 0, 0, 0, 0, 1]), 128],
uniqueLocal: [new IPv6([0xfc00, 0, 0, 0, 0, 0, 0, 0]), 7],
ipv4Mapped: [new IPv6([0, 0, 0, 0, 0, 0xffff, 0, 0]), 96],
rfc6145: [new IPv6([0, 0, 0, 0, 0xffff, 0, 0, 0]), 96],
rfc6052: [new IPv6([0x64, 0xff9b, 0, 0, 0, 0, 0, 0]), 96],
'6to4': [new IPv6([0x2002, 0, 0, 0, 0, 0, 0, 0]), 16],
teredo: [new IPv6([0x2001, 0, 0, 0, 0, 0, 0, 0]), 32],
reserved: [[new IPv6([0x2001, 0xdb8, 0, 0, 0, 0, 0, 0]), 32]]
};
IPv6.prototype.range = function() {
return ipaddr.subnetMatch(this, this.SpecialRanges);
};
IPv6.prototype.isIPv4MappedAddress = function() {
return this.range() === 'ipv4Mapped';
};
IPv6.prototype.toIPv4Address = function() {
var high, low, ref;
if (!this.isIPv4MappedAddress()) {
throw new Error("ipaddr: trying to convert a generic ipv6 address to ipv4");
}
ref = this.parts.slice(-2), high = ref[0], low = ref[1];
return new ipaddr.IPv4([high >> 8, high & 0xff, low >> 8, low & 0xff]);
};
IPv6.prototype.prefixLengthFromSubnetMask = function() {
var cidr, i, k, part, stop, zeros, zerotable;
zerotable = {
0: 16,
32768: 15,
49152: 14,
57344: 13,
61440: 12,
63488: 11,
64512: 10,
65024: 9,
65280: 8,
65408: 7,
65472: 6,
65504: 5,
65520: 4,
65528: 3,
65532: 2,
65534: 1,
65535: 0
};
cidr = 0;
stop = false;
for (i = k = 7; k >= 0; i = k += -1) {
part = this.parts[i];
if (part in zerotable) {
zeros = zerotable[part];
if (stop && zeros !== 0) {
return null;
}
if (zeros !== 16) {
stop = true;
}
cidr += zeros;
} else {
return null;
}
}
return 128 - cidr;
};
return IPv6;
})();
ipv6Part = "(?:[0-9a-f]+::?)+";
zoneIndex = "%[0-9a-z]{1,}";
ipv6Regexes = {
zoneIndex: new RegExp(zoneIndex, 'i'),
"native": new RegExp("^(::)?(" + ipv6Part + ")?([0-9a-f]+)?(::)?(" + zoneIndex + ")?$", 'i'),
transitional: new RegExp(("^((?:" + ipv6Part + ")|(?:::)(?:" + ipv6Part + ")?)") + (ipv4Part + "\\." + ipv4Part + "\\." + ipv4Part + "\\." + ipv4Part) + ("(" + zoneIndex + ")?$"), 'i')
};
expandIPv6 = function(string, parts) {
var colonCount, lastColon, part, replacement, replacementCount, zoneId;
if (string.indexOf('::') !== string.lastIndexOf('::')) {
return null;
}
zoneId = (string.match(ipv6Regexes['zoneIndex']) || [])[0];
if (zoneId) {
zoneId = zoneId.substring(1);
string = string.replace(/%.+$/, '');
}
colonCount = 0;
lastColon = -1;
while ((lastColon = string.indexOf(':', lastColon + 1)) >= 0) {
colonCount++;
}
if (string.substr(0, 2) === '::') {
colonCount--;
}
if (string.substr(-2, 2) === '::') {
colonCount--;
}
if (colonCount > parts) {
return null;
}
replacementCount = parts - colonCount;
replacement = ':';
while (replacementCount--) {
replacement += '0:';
}
string = string.replace('::', replacement);
if (string[0] === ':') {
string = string.slice(1);
}
if (string[string.length - 1] === ':') {
string = string.slice(0, -1);
}
parts = (function() {
var k, len, ref, results;
ref = string.split(":");
results = [];
for (k = 0, len = ref.length; k < len; k++) {
part = ref[k];
results.push(parseInt(part, 16));
}
return results;
})();
return {
parts: parts,
zoneId: zoneId
};
};
ipaddr.IPv6.parser = function(string) {
var addr, k, len, match, octet, octets, zoneId;
if (ipv6Regexes['native'].test(string)) {
return expandIPv6(string, 8);
} else if (match = string.match(ipv6Regexes['transitional'])) {
zoneId = match[6] || '';
addr = expandIPv6(match[1].slice(0, -1) + zoneId, 6);
if (addr.parts) {
octets = [parseInt(match[2]), parseInt(match[3]), parseInt(match[4]), parseInt(match[5])];
for (k = 0, len = octets.length; k < len; k++) {
octet = octets[k];
if (!((0 <= octet && octet <= 255))) {
return null;
}
}
addr.parts.push(octets[0] << 8 | octets[1]);
addr.parts.push(octets[2] << 8 | octets[3]);
return {
parts: addr.parts,
zoneId: addr.zoneId
};
}
}
return null;
};
ipaddr.IPv4.isIPv4 = ipaddr.IPv6.isIPv6 = function(string) {
return this.parser(string) !== null;
};
ipaddr.IPv4.isValid = function(string) {
var e;
try {
new this(this.parser(string));
return true;
} catch (error1) {
e = error1;
return false;
}
};
ipaddr.IPv4.isValidFourPartDecimal = function(string) {
if (ipaddr.IPv4.isValid(string) && string.match(/^(0|[1-9]\d*)(\.(0|[1-9]\d*)){3}$/)) {
return true;
} else {
return false;
}
};
ipaddr.IPv6.isValid = function(string) {
var addr, e;
if (typeof string === "string" && string.indexOf(":") === -1) {
return false;
}
try {
addr = this.parser(string);
new this(addr.parts, addr.zoneId);
return true;
} catch (error1) {
e = error1;
return false;
}
};
ipaddr.IPv4.parse = function(string) {
var parts;
parts = this.parser(string);
if (parts === null) {
throw new Error("ipaddr: string is not formatted like ip address");
}
return new this(parts);
};
ipaddr.IPv6.parse = function(string) {
var addr;
addr = this.parser(string);
if (addr.parts === null) {
throw new Error("ipaddr: string is not formatted like ip address");
}
return new this(addr.parts, addr.zoneId);
};
ipaddr.IPv4.parseCIDR = function(string) {
var maskLength, match, parsed;
if (match = string.match(/^(.+)\/(\d+)$/)) {
maskLength = parseInt(match[2]);
if (maskLength >= 0 && maskLength <= 32) {
parsed = [this.parse(match[1]), maskLength];
Object.defineProperty(parsed, 'toString', {
value: function() {
return this.join('/');
}
});
return parsed;
}
}
throw new Error("ipaddr: string is not formatted like an IPv4 CIDR range");
};
ipaddr.IPv4.subnetMaskFromPrefixLength = function(prefix) {
var filledOctetCount, j, octets;
prefix = parseInt(prefix);
if (prefix < 0 || prefix > 32) {
throw new Error('ipaddr: invalid IPv4 prefix length');
}
octets = [0, 0, 0, 0];
j = 0;
filledOctetCount = Math.floor(prefix / 8);
while (j < filledOctetCount) {
octets[j] = 255;
j++;
}
if (filledOctetCount < 4) {
octets[filledOctetCount] = Math.pow(2, prefix % 8) - 1 << 8 - (prefix % 8);
}
return new this(octets);
};
ipaddr.IPv4.broadcastAddressFromCIDR = function(string) {
var cidr, error, i, ipInterfaceOctets, octets, subnetMaskOctets;
try {
cidr = this.parseCIDR(string);
ipInterfaceOctets = cidr[0].toByteArray();
subnetMaskOctets = this.subnetMaskFromPrefixLength(cidr[1]).toByteArray();
octets = [];
i = 0;
while (i < 4) {
octets.push(parseInt(ipInterfaceOctets[i], 10) | parseInt(subnetMaskOctets[i], 10) ^ 255);
i++;
}
return new this(octets);
} catch (error1) {
error = error1;
throw new Error('ipaddr: the address does not have IPv4 CIDR format');
}
};
ipaddr.IPv4.networkAddressFromCIDR = function(string) {
var cidr, error, i, ipInterfaceOctets, octets, subnetMaskOctets;
try {
cidr = this.parseCIDR(string);
ipInterfaceOctets = cidr[0].toByteArray();
subnetMaskOctets = this.subnetMaskFromPrefixLength(cidr[1]).toByteArray();
octets = [];
i = 0;
while (i < 4) {
octets.push(parseInt(ipInterfaceOctets[i], 10) & parseInt(subnetMaskOctets[i], 10));
i++;
}
return new this(octets);
} catch (error1) {
error = error1;
throw new Error('ipaddr: the address does not have IPv4 CIDR format');
}
};
ipaddr.IPv6.parseCIDR = function(string) {
var maskLength, match, parsed;
if (match = string.match(/^(.+)\/(\d+)$/)) {
maskLength = parseInt(match[2]);
if (maskLength >= 0 && maskLength <= 128) {
parsed = [this.parse(match[1]), maskLength];
Object.defineProperty(parsed, 'toString', {
value: function() {
return this.join('/');
}
});
return parsed;
}
}
throw new Error("ipaddr: string is not formatted like an IPv6 CIDR range");
};
ipaddr.isValid = function(string) {
return ipaddr.IPv6.isValid(string) || ipaddr.IPv4.isValid(string);
};
ipaddr.parse = function(string) {
if (ipaddr.IPv6.isValid(string)) {
return ipaddr.IPv6.parse(string);
} else if (ipaddr.IPv4.isValid(string)) {
return ipaddr.IPv4.parse(string);
} else {
throw new Error("ipaddr: the address has neither IPv6 nor IPv4 format");
}
};
ipaddr.parseCIDR = function(string) {
var e;
try {
return ipaddr.IPv6.parseCIDR(string);
} catch (error1) {
e = error1;
try {
return ipaddr.IPv4.parseCIDR(string);
} catch (error1) {
e = error1;
throw new Error("ipaddr: the address has neither IPv6 nor IPv4 CIDR format");
}
}
};
ipaddr.fromByteArray = function(bytes) {
var length;
length = bytes.length;
if (length === 4) {
return new ipaddr.IPv4(bytes);
} else if (length === 16) {
return new ipaddr.IPv6(bytes);
} else {
throw new Error("ipaddr: the binary input is neither an IPv6 nor IPv4 address");
}
};
ipaddr.process = function(string) {
var addr;
addr = this.parse(string);
if (addr.kind() === 'ipv6' && addr.isIPv4MappedAddress()) {
return addr.toIPv4Address();
} else {
return addr;
}
};
}).call(this);

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node_modules/proxy-addr/node_modules/ipaddr.js/lib/ipaddr.js.d.ts generated vendored Normal file
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declare module "ipaddr.js" {
type IPv4Range = 'unicast' | 'unspecified' | 'broadcast' | 'multicast' | 'linkLocal' | 'loopback' | 'carrierGradeNat' | 'private' | 'reserved';
type IPv6Range = 'unicast' | 'unspecified' | 'linkLocal' | 'multicast' | 'loopback' | 'uniqueLocal' | 'ipv4Mapped' | 'rfc6145' | 'rfc6052' | '6to4' | 'teredo' | 'reserved';
interface RangeList<T> {
[name: string]: [T, number] | [T, number][];
}
// Common methods/properties for IPv4 and IPv6 classes.
class IP {
prefixLengthFromSubnetMask(): number | null;
toByteArray(): number[];
toNormalizedString(): string;
toString(): string;
}
namespace Address {
export function isValid(addr: string): boolean;
export function fromByteArray(bytes: number[]): IPv4 | IPv6;
export function parse(addr: string): IPv4 | IPv6;
export function parseCIDR(mask: string): [IPv4 | IPv6, number];
export function process(addr: string): IPv4 | IPv6;
export function subnetMatch(addr: IPv4, rangeList: RangeList<IPv4>, defaultName?: string): string;
export function subnetMatch(addr: IPv6, rangeList: RangeList<IPv6>, defaultName?: string): string;
export class IPv4 extends IP {
static broadcastAddressFromCIDR(addr: string): IPv4;
static isIPv4(addr: string): boolean;
static isValidFourPartDecimal(addr: string): boolean;
static isValid(addr: string): boolean;
static networkAddressFromCIDR(addr: string): IPv4;
static parse(addr: string): IPv4;
static parseCIDR(addr: string): [IPv4, number];
static subnetMaskFromPrefixLength(prefix: number): IPv4;
constructor(octets: number[]);
octets: number[]
kind(): 'ipv4';
match(addr: IPv4, bits: number): boolean;
match(mask: [IPv4, number]): boolean;
range(): IPv4Range;
subnetMatch(rangeList: RangeList<IPv4>, defaultName?: string): string;
toIPv4MappedAddress(): IPv6;
}
export class IPv6 extends IP {
static broadcastAddressFromCIDR(addr: string): IPv6;
static isIPv6(addr: string): boolean;
static isValid(addr: string): boolean;
static parse(addr: string): IPv6;
static parseCIDR(addr: string): [IPv6, number];
static subnetMaskFromPrefixLength(prefix: number): IPv6;
constructor(parts: number[]);
parts: number[]
zoneId?: string
isIPv4MappedAddress(): boolean;
kind(): 'ipv6';
match(addr: IPv6, bits: number): boolean;
match(mask: [IPv6, number]): boolean;
range(): IPv6Range;
subnetMatch(rangeList: RangeList<IPv6>, defaultName?: string): string;
toIPv4Address(): IPv4;
}
}
export = Address;
}

70
node_modules/proxy-addr/node_modules/ipaddr.js/package.json generated vendored Normal file
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{
"_from": "ipaddr.js@1.9.1",
"_id": "ipaddr.js@1.9.1",
"_inBundle": false,
"_integrity": "sha512-0KI/607xoxSToH7GjN1FfSbLoU0+btTicjsQSWQlh/hZykN8KpmMf7uYwPW3R+akZ6R/w18ZlXSHBYXiYUPO3g==",
"_location": "/proxy-addr/ipaddr.js",
"_phantomChildren": {},
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82
node_modules/proxy-addr/package.json generated vendored Normal file
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@ -0,0 +1,82 @@
{
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"author": {
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},
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