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Why is my CDN Site not caching?

  • Updated
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Question

Why is my CDN Site not caching?

Answer:

To confirm your CDN site is not caching, use Curl command. You should always get a "MISS" as result. Refer to https://help.onapp.com/hc/en-us/articles/222042908.

When your CDN url is not caching, it can due to the following:

  1. Origin Cache-Control set as no-cache
  2. Cookies are enabled, you have to configure "ignore set cookies" in CDN resource advance settings.
  3. Expiry header comes before Cache-Control header. Our system will honor the order of web header. If expiry header is set at an old date, then the content will never be cached.
  4. You get a 301/302 redirection when you are performing "curl -I" on your cdn url. You may need to remove the redirection from the web origin, or use IP origin (if the redirection rule did not apply on IP).