User Guide

http.request_id

request_id generates a UUID which can be referenced via the {request_id} placeholder, for use in many other directives including header and log

When request_id is used, the {request_id} placeholder will have a value; otherwise it will be empty.

Syntax

request_id [header_field]

Examples

Set the request ID in a response header:

request_id header / Caddy-Request-Id {request_id}

Read the request ID from a request header called X-Request-ID, if present:

request_id X-Request-ID

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