AMP Project

CSP for AMP Project

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Using AMP Project with Content Security Policy

AMP is an open source HTML framework developed by the AMP Open Source Project. It was originally created by Google as a competitor to Facebook Instant Articles.

Allow these directives in your CSP, to support AMP Project in your Content Security Policy:

frame-ancestors
  *.ampproject.org
  about:;
script-src
  https://cdn.ampproject.org;
style-src
  'unsafe-inline'
  cdn.ampproject.org;
frame-src
  *.ampproject.net;
child-src
  blob:;
img-src
  data:
  blob:
  *.ampproject.org;
font-src
  data:;
connect-src
  data:
  cdn.ampproject.org
  *.ampproject.net
  ampcid.google.com;
worker-src
  blob:;

The main domains used by AMP Project are:

ampproject.org
ampproject.net

Example Content-Security-Policy violations / reports:

Using the above CSP package, will fix these errors that you may be seeing in your console logs:

script-src/script-src-elem/script-src-attrviolations

Refused to load the script 'https://cdn.ampproject.org/v0/amp-ad-0.1.js' because it violates the following Content Security Policy directive: "script-src 'self' 'report-sample'". Note that 'script-src-elem' was not explicitly set, so 'script-src' is used as a fallback.

If you see inline script errors, you need to add SHA-256 hashes / nonces to your CSP with RapidSec:

Refused to execute inline script because it violates the following Content Security Policy directive: "script-src 'self' 'report-sample'". Either the 'unsafe-inline' keyword, a hash ('sha256-RFWPLDbv2BY+rCkDzsE+0fr8ylGr2R2faWMhq4lfEQc='), or a nonce ('nonce-...') is required to enable inline execution.

If you see inline eval() errors, RapidSec will generate your CSP with the specific content of the errors:

Refused to evaluate a string as JavaScript because 'unsafe-eval' is not an allowed source of script in the following Content Security Policy directive: "script-src 'self' 'report-sample'".

style-src/style-src-elem/style-src-attrviolations

Refused to load the stylesheet 'ampproject.org' because it violates the following Content Security Policy directive: "style-src 'self' 'report-sample'". Note that 'style-src-elem' was not explicitly set, so 'style-src' is used as a fallback.

If you see inline style errors, you need to add SHA-256 hashes / nonces to your CSP with RapidSec:

Refused to apply inline style because it violates the following Content Security Policy directive: "style-src 'self' 'report-sample'". Either the 'unsafe-inline' keyword, a hash ('sha256-RFWPLDbv2BY+rCkDzsE+0fr8ylGr2R2faWMhq4lfEQc='), or a nonce ('nonce-...') is required to enable inline execution.

font-srcviolations

Refused to load the font 'ampproject.org' because it violates the following Content Security Policy directive: "font-src 'self'"

img-srcviolations

Refused to load the image 'ampproject.org' because it violates the following Content Security Policy directive: "img-src 'self'".

frame-srcviolations

[Report Only] Refused to frame 'ampproject.org' because it violates the following Content Security Policy directive: "frame-src 'self'".

form-actionviolations

[Report Only] Refused to send form data to 'ampproject.org' because it violates the following Content Security Policy directive: "form-action 'self'".

connect-srcviolations

[Report Only] Refused to connect to 'ampproject.org' because it violates the following Content Security Policy directive: "connect-src 'self'"