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I want to set Content-Security-Policy header in my site.

I found a module to set CSP (I have not tried it yet). But I want to know is there any option available in drupal 8 core itself to set CSP.

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  • i set it in nginx config since it has nothing to do with drupal itself. but you could simply alter the page headers via hook_attachments(i think) and add a new header.
    – user21641
    Jun 22, 2018 at 9:59
  • There might be. There is stuff for CORS (drupal.org/node/2715637). I am actually working on this stuff right now.
    – Patrick
    Jul 18, 2018 at 13:29

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I may be a bit biased in thinking that the Content Security Policy module is the best solution for adding a policy to your site, but here are some of the reasons for using the module:

  • Integration with the Libraries API to automatically generate script and style directives
  • An admin interface that validates your policy configuration
  • Provides a reporting endpoint to receive policy violations and add them to your site log, so you don't need to use an external service like Report-URI.com (but it also provides a plugin to use it, if you do).
    The Reporting API module is still in beta, but it will have improvements over CSP's reporting handler, and has a plugin to integrate with CSP module.
  • Some optimizations to shorten your policy where possible (e.g. If a fetch directive like img-src that falls back to default-src has the same value, it is omitted)
  • In the future modules will be able to integrate with CSP module to alter the policy as needed (enabling additional directives, altering the policy per-page)

There are a couple alternatives to the CSP module, if you don't want all of these additional features:

  • The Security Kit module allows adding a CSP policy header, but it only allows either an enforced or report-only policy, and it does not have fields for many newer directives.
  • The HTTP Response Headers module allows you to configure a static value for any HTTP header you want
  • Set a static header in your own response event subscriber in a custom module.
  • You can set the header directly in Apache or nginx configuration
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