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The list of CloudFlare IPs (IP ranges) to be used in the "trust proxy" (behind proxy) configurations

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# CloudFlare IP Ranges

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The list of **[CloudFlare][cloudflare]** IPs (IP ranges) to be used in the *[trust proxy][proxy]*
configurations.

## How to Use

```bash
$ npm install cloudflare-ips    # or, `yarn add cloudflare-ips`
```

```js
const express = require('express');
const cloudflareIPs = require('cloudflare-ips');

const app = express();

cloudflareIPs(
  ips => app.set('trust proxy', ['loopback', ...ips]),
  err => console.error(err.stack),
);

cloudflareIPs((err, ips) => {
  app.set('trust proxy', ['loopback', ...ips]);
});

app.listen(8080);
```

## API

#### `cloudFlareIPs(onUpdate, onError, options)`

* `onUpdate`: `(ips: string[]) => void` — a callback function accepting the list of IPs
* `onError`: `(err: Error) => void` — a callback that is triggered on error (optional)
* `options`: `{ inteval: number }` — allows to tweak the default settings (optional)

## Related Projects

* [Node.js API Starter Kit][nsk] — Boilerplate and tooling for building data APIs with Docker,
  Node.js and GraphQL

## License

---
Made with ♥ by Konstantin Tarkus ([@koistya](https://twitter.com/koistya), [blog](https://medium.com/@tarkus))

[cloudflare]: https://www.cloudflare.com/
[proxy]: https://expressjs.com/en/guide/behind-proxies.html
[nsk]: https://github.com/kriasoft/nodejs-api-starter
[kriasoft]: https://www.kriasoft.com/
[license]: https://github.com/kriasoft/cloudflare-ips/blob/master/LICENSE.txt

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