77 lines
2.1 KiB
Markdown
77 lines
2.1 KiB
Markdown
# uid-safe
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[![NPM Version][npm-image]][npm-url]
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[![NPM Downloads][downloads-image]][downloads-url]
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[![Node.js Version][node-version-image]][node-version-url]
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[![Build Status][travis-image]][travis-url]
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[![Test Coverage][coveralls-image]][coveralls-url]
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URL and cookie safe UIDs
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Create cryptographically secure UIDs safe for both cookie and URL usage.
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This is in contrast to modules such as [rand-token](https://www.npmjs.com/package/rand-token)
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and [uid2](https://www.npmjs.com/package/uid2) whose UIDs are actually skewed
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due to the use of `%` and unnecessarily truncate the UID.
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Use this if you could still use UIDs with `-` and `_` in them.
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## Installation
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```sh
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$ npm install uid-safe
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```
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## API
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```js
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var uid = require('uid-safe')
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```
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### uid(byteLength, callback)
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Asynchronously create a UID with a specific byte length. Because `base64`
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encoding is used underneath, this is not the string length. For example,
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to create a UID of length 24, you want a byte length of 18.
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```js
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uid(18, function (err, string) {
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if (err) throw err
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// do something with the string
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})
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```
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### uid(byteLength)
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Asynchronously create a UID with a specific byte length and return a
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`Promise`.
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**Note**: To use promises in Node.js _prior to 0.12_, promises must be
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"polyfilled" using `global.Promise = require('bluebird')`.
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```js
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uid(18).then(function (string) {
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// do something with the string
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})
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```
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### uid.sync(byteLength)
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A synchronous version of above.
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```js
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var string = uid.sync(18)
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```
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## License
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[MIT](LICENSE)
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[npm-image]: https://img.shields.io/npm/v/uid-safe.svg
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[npm-url]: https://npmjs.org/package/uid-safe
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[node-version-image]: https://img.shields.io/node/v/uid-safe.svg
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[node-version-url]: https://nodejs.org/en/download/
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[travis-image]: https://img.shields.io/travis/crypto-utils/uid-safe/master.svg
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[travis-url]: https://travis-ci.org/crypto-utils/uid-safe
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[coveralls-image]: https://img.shields.io/coveralls/crypto-utils/uid-safe/master.svg
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[coveralls-url]: https://coveralls.io/r/crypto-utils/uid-safe?branch=master
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[downloads-image]: https://img.shields.io/npm/dm/uid-safe.svg
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[downloads-url]: https://npmjs.org/package/uid-safe
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