---
title: "Cloudflare | Using a proxy | Documentation - Vemetric"
description: "Optimize tracking by proxying data via Cloudflare."
url: https://vemetric.com/docs/advanced-guides/using-a-proxy/cloudflare
---

# Setting up a proxy using Cloudflare

Optimize tracking by proxying data via Cloudflare.

* * *

With Cloudflare Workers, you can easily proxy the traffic through your own domain. We’ve prepared the following step-by-step guide to help you set it up.

## Setup

### Create the Cloudflare Worker

Navigate to the **Compute (Workers)** > **Workers & Pages** section in the Cloudflare dashboard and click on `Create`. Choose the “Hello World” template and deploy it.

> If you choose to rename the worker, we recommend avoiding names like `analytics` or `tracking`, as this might lead to Cloudflare taking them down.

Once the worker is created, click on `Edit Code` and paste the following code.

```js
addEventListener('fetch', event => {
  event.respondWith(handleRequest(event.request))
});

const scriptUrl = 'https://cdn.vemetric.com/main.js'
const hubUrl = 'https://hub.vemetric.com'
const robotsTag = 'noindex, nofollow'

async function withRobotsHeader(responsePromise) {
  const response = await responsePromise;
  const newResponse = new Response(response.body, response);
  newResponse.headers.set('X-Robots-Tag', robotsTag);
  return newResponse;
}

async function handleRequest(request) {
  const url = new URL(request.url)

  if (url.pathname === '/main.js') {
    return await withRobotsHeader(fetch(scriptUrl));
  } else {
    const newRequest = new Request(hubUrl + url.pathname, request);
    newRequest.headers.set('x-country', request.headers.get('cf-ipcountry'));
    newRequest.headers.set('x-client-ip', request.headers.get('x-real-ip'));

    return await withRobotsHeader(fetch(newRequest));
  }
}
```

### Add the Worker Route

On your domain’s Dashboard, go to **Workers Routes** and add a new HTTP Route.

Set the Route to your desired domain including a wildcard path (e.g. `hub.yourdomain.com/*`) and choose the Worker you created in the previous step.

![Add a new HTTP Route](https://vemetric.com/_astro/addroute.BAbGSR0h_28iEug.webp)

> We recommend avoiding names or paths like `analytics.yourdomain.com` or `yourdomain.com/track`, as this might also trigger ad/tracker blockers.
> 
> Use more generic names like `hub.yourdomain.com` instead.

### Create the DNS Record

The last step on Cloudflare is to create a DNS record for your proxy domain. It should be a record of Type `A` and the Name should be your desired subdomain (e.g. `hub`). Set the Content to `192.0.2.1` and leave the Proxy status as `Proxied`.

![Create a DNS record](https://vemetric.com/_astro/dnsrecord.Bgq8VT67_1jrsOX.webp)

### Configure Vemetric

Depending on your setup you need to adjust the Vemetric configuration:

**HTML**

The `src` attribute of the script tag should now point to `https://hub.yourdomain.com/main.js`. You also need to pass the `data-host` attribute with the value of `https://hub.yourdomain.com`

```html
<script>
  window.vmtrcq = window.vmtrcq || [];
  window.vmtrc = window.vmtrc || function (){window.vmtrcq.push(Array.prototype.slice.call(arguments))};
</script>
<script defer src="https://hub.yourdomain.com/main.js" data-host="https://hub.yourdomain.com" data-token="YOUR_PROJECT_TOKEN"></script>
```

**JavaScript**

For the JavaScript SDK, you need to pass the `scriptUrl` and `host` options to the `init` function with the value of your proxy domain.

```ts
import { vemetric } from '@vemetric/web';

vemetric.init({
  token: 'YOUR_PROJECT_TOKEN',
  scriptUrl: 'https://hub.yourdomain.com/main.js',
  host: 'https://hub.yourdomain.com',
});
```

**React**

For the React SDK, you need to pass the `scriptUrl` and `host` props to the `VemetricScript` component with the value of your proxy domain.

```tsx
import { VemetricScript } from '@vemetric/react';

<VemetricScript
  token="YOUR_PROJECT_TOKEN"
  scriptUrl="https://hub.yourdomain.com/main.js"
  host="https://hub.yourdomain.com"
/>
```

**Astro**

For the Astro SDK, you need to pass the `scriptUrl` and `host` props to the `VemetricScript` component with the value of your proxy domain.

```tsx
import { VemetricScript } from '@vemetric/astro';

<VemetricScript
  token="YOUR_PROJECT_TOKEN"
  scriptUrl="https://hub.yourdomain.com/main.js"
  host="https://hub.yourdomain.com"
/>
```

Congratulations! You’ve successfully set up a proxy using Cloudflare Workers. Please reach out if you have any questions.