This behavior logs custom details from the origin response in the Log Delivery Service report.

Features and options

Field What it does

Include Custom Log Field Specify whether to append additional custom data to each log line.

Custom Log Field With Include Custom Log Field set to On, specifies an additional data field to append to each log line, maximum 1000 bytes, typically based on a dynamically generated built-in system variable. For example, round-trip: {{builtin.AK_CLIENT_TURNAROUND_TIME}}ms logs the total time to complete the response. This field can contain both request and response information, and overrides any Custom Log Field value specified in the Log Request Details behavior.

Variable Support: This option supports variable expression syntax. Typing {{ in the option field triggers variable auto complete. Learn more about variable support.

Field	What it does
Include Custom Log Field	Specify whether to append additional custom data to each log line.
Custom Log Field	With Include Custom Log Field set to On, specifies an additional data field to append to each log line, maximum 1000 bytes, typically based on a dynamically generated built-in system variable. For example, `round-trip: {{builtin.AK_CLIENT_TURNAROUND_TIME}}ms` logs the total time to complete the response. This field can contain both request and response information, and overrides any Custom Log Field value specified in the Log Request Details behavior. Variable Support: This option supports variable expression syntax. Typing {{ in the option field triggers variable auto complete. Learn more about variable support.