Koa Context Cache Control

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[![Build status][travis-image]][travis-url]
[![Test coverage][codecov-image]][codecov-url]
[![Dependency Status][david-image]][david-url]
[![License][license-image]][license-url]
[![Downloads][downloads-image]][downloads-url]

Augments Koa with ctx.cacheControl() and ctx.response.cacheControl().

Example

``js
const Koa = require('koa')

const app = new Koa()

require('koa-ctx-cache-control')(app)

app.use(async (ctx, next) => {
ctx.cacheControl(false) // no cache

await next()
})
`

API

$3

If it's a time ms can parse, then it uses that time as the max age:

`js
ctx.cacheControl('1 second') // => max-age=1
`

Otherwise, it sets the header directly:

`js
ctx.cacheControl('max-age=0') // => max-age=0
`

$3

Sets the max age with a number in milliseconds.

`js
ctx.cacheControl(1000) // => max-age=1
``

$3

Sets a no cache directive.

[npm-image]: https://img.shields.io/npm/v/koa-ctx-cache-control.svg?style=flat-square
[npm-url]: https://npmjs.org/package/koa-ctx-cache-control
[travis-image]: https://img.shields.io/travis/koajs/ctx-cache-control/master.svg?style=flat-square
[travis-url]: https://travis-ci.org/koajs/ctx-cache-control
[codecov-image]: https://img.shields.io/codecov/c/github/koajs/ctx-cache-control/master.svg?style=flat-square
[codecov-url]: https://codecov.io/github/koajs/ctx-cache-control
[david-image]: http://img.shields.io/david/koajs/ctx-cache-control.svg?style=flat-square
[david-url]: https://david-dm.org/koajs/ctx-cache-control
[license-image]: http://img.shields.io/npm/l/koa-ctx-cache-control.svg?style=flat-square
[license-url]: LICENSE
[downloads-image]: http://img.shields.io/npm/dm/koa-ctx-cache-control.svg?style=flat-square
[downloads-url]: https://npmjs.org/package/koa-ctx-cache-control