UUID Token Generator


Provides a class that generates random tokens with custom size and base-encoding using the RFC 4122 v4 UUID algorithm. Generated tokens are strings that are guaranteed to always be the same length, depending on the bit-size specified for the token.

Great for generating things like API keys and compact UIDs.

---

$3

---

This package is no longer being maintained because a better one exists—uid-generator—which is better for the following reasons:

+ It has more flexible token generation options
+ i.e. You can specify the length of the token that you'd like to generate
+ It has both a synchronous and asynchronous interface
+ It is less likely to produce colliding tokens
+ It's more performant

---

Installation

``sh
npm install uuid-token-generator --save
`




Usage

`js
const TokenGenerator = require('uuid-token-generator');

const tokgen = new TokenGenerator(); // Default is a 128-bit token encoded in base58
tokgen.generate();
// -> '4QhmRwHwwrgFqXULXNtx4d'

const tokgen2 = new TokenGenerator(256, TokenGenerator.BASE62);
tokgen2.generate();
// -> 'x6GCX3aq9hIT8gjhvO96ObYj0W5HBVTsj64eqCuVc5X'
`




API

$3


Creates a new TokenGenerator instance that generates bitSize-bit tokens encoded using the characters in baseEncoding.

| Param | Default | Type | Description |
|:------|:--------|:-----|:------------|
| [bitSize] | 128 | number | The size of the token to generate in bits. Must be a multiple of 128. |
| [baseEncoding] | TokenGenerator.BASE58 | string | One of the TokenGenerator.BASE## constants or a custom string of characters to use to encode the token. |

Example
`js
new TokenGenerator();
new TokenGenerator(256);
new TokenGenerator(TokenGenerator.BASE36);
new TokenGenerator(512, TokenGenerator.BASE62);
new TokenGenerator('0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz+/'); // Custom encoding (base64)
`

---

$3


0123456789abcdef

$3

0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ

$3

123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz

$3

0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz

$3

0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-._~

(all ASCII characters that do not need to be encoded in a URI as specified by RFC 3986)

$3

0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz!'()*-._~

(all ASCII characters that are not encoded by encodeURIComponent())

---

$3

Generates a random token.

Returns: String - A random token that is always tokgen.tokenLength characters long.

Example
`js
const tokgen = new TokenGenerator();
tokgen.generate();
// -> 'vf5NrETkUKCa6FhkyRSazD'
`

---

$3


The size of the token that will be generated in bits (the bitSize value passed to the TokenGenerator constructor).

Example
`js
new TokenGenerator().bitSize // -> 128
new TokenGenerator(256).bitSize // -> 256
`

$3


The set of characters used to encode the token (the baseEncoding value passed to the TokenGenerator constructor).

Example
`js
new TokenGenerator().baseEncoding // -> '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
new TokenGenerator('abc').baseEncoding // -> 'abc'
`

$3


The base of the token that will be generated (which is the number of characters in the baseEncoding).

Example
`js
new TokenGenerator().base // -> 58
new TokenGenerator(TokenGenerator.BASE62).base // -> 62
new TokenGenerator('abc').base // -> 3
`

$3


The length of the token that will be generated. The generated token will always be this length.
Calculated as such: tokenLength = Math.ceil(bitSize / Math.log2(base))

Example
`js
new TokenGenerator().tokenLength // -> 22
new TokenGenerator(256, TokenGenerator.BASE62).tokenLength // -> 43
``