# koa-redirect-loop

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> Prevent redirect loops with sessions since HTTP referrer header is unreliable and ensures sessions are saved upon redirect

> Note that this package only supports `koa-generic-session`, since other packages do not expose a save method used in `res.end` override.


## Table of Contents

* [Install](#install)
* [Usage](#usage)
* [Options](#options)
* [Contributors](#contributors)
* [License](#license)


## Install

[npm][]:

```sh
npm install koa-redirect-loop
```


## Usage

```js
const Koa = require('koa');
const session = require('koa-generic-session');
const RedirectLoop = require('koa-redirect-loop');

const redirectLoop = new RedirectLoop({
  defaultPath: '/',
  maxRedirects: 5,
  logger: console
});

const app = new Koa();
app.keys = [ 'secret' ];

app.use(session());
app.use(redirectLoop.middleware);
```


## Options

* `getDefaultPath` (Function) - function which accepts `ctx` argument and returns a path to fallback to, defaults to either `/${ctx.request.locale}` (e.g. if using `@ladjs/i18n`) or `/`
* `defaultPath` (String) - path to fallback to, defaults to `'/'`
* `maxRedirects` (Number) - maximum number of redirects to allow, defaults to `5`
* `console` (Object) - a logger instance, defaults to `console`


## Contributors

| Name           | Website                    |
| -------------- | -------------------------- |
| **Nick Baugh** | <http://niftylettuce.com/> |


## License

[MIT](LICENSE) © [Nick Baugh](http://niftylettuce.com/)


##

[npm]: https://www.npmjs.com/