Matt Sicker created LOG4J2-3343:
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Summary: Add ability to use exclusion pattern filter on Map
Resolver keys
Key: LOG4J2-3343
URL: https://issues.apache.org/jira/browse/LOG4J2-3343
Project: Log4j 2
Issue Type: New Feature
Components: JsonTemplateLayout
Reporter: Matt Sicker
Map Resolver currently supports specifying a pattern to filter for allowed keys
in the map being resolved. I'd like a complementary feature to specify a
pattern to filter for excluded keys from the map being resolved. It may also be
beneficial to provide a similar option for excluded keys as full string matches
rather than always using a pattern.
For an example use case, suppose I copy request HTTP header names and values
into the ThreadContext for every request. In Spinnaker microservices, this
includes custom headers like {{X-Spinnaker-Groups}} which contains a list of
groups the authenticated user belongs to which are filled in by the Fiat
microservice (used for integrating authentication and authorization with
various providers and providing a facade over Spring Security). If I want to
exclude this header from being logged, I can currently set a negative lookahead
pattern like {{(?i(?!x-spinnaker-groups))}} which works effectively the same,
but how many developers like reading regex incantations like these?
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