Denied the execution of the inline script due to a violation of the CSP by the Chrome extension

We've been working on integrating Google Analytics into our Chrome extension, and here are the steps we've taken:

We updated our manifest.json with the following line:

"Content-Security-Policy": "default-src 'self'; script-src 'nonce-4AEemGb0xJptoIGFP3Nd'",

Then, in our index.html:

<head>

  <meta charset="utf-8">
  <script>
    window.ga=window.ga||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date;
    ga('create', 'XXXXX', 'auto');
    ga('send', 'pageview');
</script>
<script async src='https://www.google-analytics.com/analytics.js' nonce="4AEemGb0xJptoIGFP3Nd"></script>

<!-- End Google Analytics -->
</head>

We attempted using hash, nonce, and unsafe inline, but encountered the same error message in all cases:

https://i.sstatic.net/PeUbW.png

At this point, I'm running out of ideas.

javascriptgoogle-analyticscontent-security-policy

Answer №1

Google offers a guide on integrating GA into Chrome extensions:

Setting up the tracking code

The usual Google Analytics tracking code snippet retrieves a file called ga.js from a secure SSL URL when the page is loaded using the https:// protocol. Chrome extensions and applications are required to use the SSL-protected version of ga.js. Chrome's default Content Security Policy prohibits loading ga.js over insecure HTTP. Due to the fact that Chrome extensions are hosted under the chrome-extension:// schema, a slight adjustment is necessary in the tracking snippet to fetch ga.js directly from instead of the default location.

Here is a modified snippet for the asynchronous tracking API (the modification is highlighted):

(function() {
  var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
  ga.src = 'https://ssl.google-analytics.com/ga.js';
  var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();

You will also need to adjust your extension to allow loading the resource by adjusting the default content security policy. The policy definition in your manifest.json file might appear as follows:

{
  ...,
  "content_security_policy": "script-src 'self' https://ssl.google-analytics.com; object-src 'self'",
  ...
}

Below is an example of a popup page (popup.html) that loads the asynchronous tracking code through an external JavaScript file (popup.js) and tracks a single page view:

<!DOCTYPE html>
<html>
  <head>
    ...
    <script src="popup.js"></script>
  </head>
  <body>
    ...
  </body>
</html>

var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-XXXXXXXX-X']);
_gaq.push(['_trackPageview']);

(function() {
  var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
  ga.src = 'https://ssl.google-analytics.com/ga.js';
  var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();

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