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Response Headers

Response Headers#

In this phase, the headers sent from the origin to the end user are modified or set. This is essential for setting cache instructions or adjusting other header values for efficient delivery and control.

Example: Applying cache tags to images to simplify their removal from a CDN when updated.


  • headers.set - Changes or adds a new response header.
  • headers.cache_tag.set - Designates specific cache tags for efficient purging.


Available fields in the Response Headers phase: