validate entity tag

Property Manager name: Validate Entity Tag (ETag)
Behavior version: The v2025-01-13 rule format supports the validate_entity_tag behavior v1.3.
Rule format status: GA, stable
Access: Read/Write
Allowed in includes: Yes

Instructs edge servers to compare the request's ETag header with that of the cached object. If they differ, the edge server sends a new copy of the object. This validation occurs in addition to the default validation of Last-Modified and If-Modified-Since headers.

You can specify whether this behavior should support only strong ETag values, ignoring weak ETag and always returning a full response, or weak values should also be accepted. For more details, see the RFC Standard.

Option Type Description Requires

Option	Type	Description
`enabled`	boolean	Enables the ETag validation behavior.	{"displayType":"boolean","tag":"input","type":"checkbox"}
`non_strict_enabled`	boolean	Whether you want to allow strong `ETag` values that are not surrounded by double quotes. Technically these are malformed and non-standard, but are commonly used.	{"displayType":"boolean","tag":"input","type":"checkbox"} {"if":{"attribute":"enabled","op":"eq","value":true}}
`weak_enabled`	boolean	Whether you want to allow weak `ETag` values that start with `W/`.	{"displayType":"boolean","tag":"input","type":"checkbox"} {"if":{"attribute":"enabled","op":"eq","value":true}}

enabled

boolean

Enables the ETag validation behavior.

{"displayType":"boolean","tag":"input","type":"checkbox"}

non_strict_enabled

boolean

Whether you want to allow strong ETag values that are not surrounded by double quotes. Technically these are malformed and non-standard, but are commonly used.

{"displayType":"boolean","tag":"input","type":"checkbox"}

{"if":{"attribute":"enabled","op":"eq","value":true}}

weak_enabled

boolean

Whether you want to allow weak ETag values that start with W/.

{"displayType":"boolean","tag":"input","type":"checkbox"}

{"if":{"attribute":"enabled","op":"eq","value":true}}