[jira] [Created] (KAFKA-14655) Case-insensitive header key operations in Java client

["Romain Quinio (Jira)" <ji...@apache.org>]

Romain Quinio created KAFKA-14655:
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             Summary: Case-insensitive header key operations in Java client
                 Key: KAFKA-14655
                 URL: https://issues.apache.org/jira/browse/KAFKA-14655
             Project: Kafka
          Issue Type: New Feature
            Reporter: Romain Quinio


In the Java client, Kafka header keys are manipulated as String. The current implementation uses case-sensitive comparisons via #equals (rather than #equalsIgnoreCase): [https://github.com/apache/kafka/blob/trunk/clients/src/main/java/org/apache/kafka/common/header/internals/RecordHeaders.java#L89]

It would be useful to be able to ignore the case during header operations (get/delete/...) similarly to how HTTP header keys are manipulated by clients.

In particular in case of bridging HTTP -> Kafka, Kafka headers may be conveyed first as HTTP headers where the case of the key doesn't matter, the difference of behavior can be surprising.



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