optionalHeaderValueByType
optionalHeaderValueByType
Description
Optionally extracts the value of the HTTP request header of the given type.
The optionalHeaderValueByType directive is similar to the headerValueByType directive but always extracts
an Optional value instead of rejecting the request if no matching header could be found.
Note
Custom headers will only be matched by this directive if they extend ModeledCustomHeader
from the Scala DSL and there is currently no API for the Java DSL (Ticket #20415)
To learn more about defining custom headers, read: Custom Headers.
Example
TODO: Example snippets for JavaDSL are subject to community contributions! Help us complete the docs, read more about it here: write example snippets for Akka HTTP Java DSL #20466.
Contents
