# egg-cookies
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[![NPM version][npm-image]][npm-url]
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[![build status][travis-image]][travis-url]
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[![Test coverage][codecov-image]][codecov-url]
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[![David deps][david-image]][david-url]
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[![Known Vulnerabilities][snyk-image]][snyk-url]
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[![npm download][download-image]][download-url]
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[npm-image]: https://img.shields.io/npm/v/egg-cookies.svg?style=flat-square
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[npm-url]: https://npmjs.org/package/egg-cookies
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[travis-image]: https://img.shields.io/travis/eggjs/egg-cookies.svg?style=flat-square
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[travis-url]: https://travis-ci.org/eggjs/egg-cookies
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[codecov-image]: https://codecov.io/gh/eggjs/egg-cookies/branch/master/graph/badge.svg
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[codecov-url]: https://codecov.io/gh/eggjs/egg-cookies
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[david-image]: https://img.shields.io/david/eggjs/egg-cookies.svg?style=flat-square
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[david-url]: https://david-dm.org/eggjs/egg-cookies
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[snyk-image]: https://snyk.io/test/npm/egg-cookies/badge.svg?style=flat-square
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[snyk-url]: https://snyk.io/test/npm/egg-cookies
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[download-image]: https://img.shields.io/npm/dm/egg-cookies.svg?style=flat-square
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[download-url]: https://npmjs.org/package/egg-cookies
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Extends [pillarjs/cookies](https://github.com/pillarjs/cookies) to adapt koa and egg with some additional features.
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## Encrypt
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egg-cookies provide an alternative `encrypt` mode like `signed`. An encrypt cookie's value will be encrypted base on keys. Anyone who don't have the keys are unable to know the original cookie's value.
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```js
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const Cookies = require('egg-cookies');
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const cookies = new Cookies(ctx, keys);
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cookies.set('foo', 'bar', { encrypt: true });
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cookies.get('foo', { encrypt: true });
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```
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**Note: you should both indicating in get and set in pairs.**
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## Cookie Length Check
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[Browsers all had some limitation in cookie's length](http://browsercookielimits.squawky.net/), so if set a cookie with an extremely long value(> 4093), egg-cookies will emit an `cookieLimitExceed` event. You can listen to this event and record.
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```js
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const Cookies = require('egg-cookies');
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const cookies = new Cookies(ctx, keys);
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cookies.on('cookieLimitExceed', { name, value } => {
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// log
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});
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cookies.set('foo', longText);
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```
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## License
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[MIT](LICENSE.txt)
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