caddy-website/src/docs/markdown/caddyfile/directives/log_append.md

title
log_append (Caddyfile directive)

log_append

Appends a field to the access log for the current request.

This should be used alongside the log directive which is required to enable access logging in the first place.

The value may be a static string, or a placeholder which will be replaced with the value of the placeholder at the time of the request.

Syntax

log_append [<matcher>] <key> <value>

Examples

Display in the logs the area of the site that the request is being served from, either static or dynamic:

example.com {
	log

	handle /static* {
		log_append area "static"
		respond "Static response!"
	}

	handle {
		log_append area "dynamic"
		reverse_proxy localhost:9000
	}
}