Prithvi S created HDDS-17203:
--------------------------------

             Summary: Avoid regex String.split when parsing SigV4 Authorization 
headers
                 Key: HDDS-17203
                 URL: https://issues.apache.org/jira/browse/HDDS-17203
             Project: Apache Ozone
          Issue Type: Improvement
          Components: S3
            Reporter: Prithvi S


AuthorizationV4HeaderParser.parseSignature splits the header with 
String.split(", *") on every signed S3 request. That compiles a regex each time.

Split on ',' and trim the parts instead, same idea as HDDS-16749. Behavior 
stays the same.



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