[jboss-jira] [JBoss JIRA] (WFLY-13483) Add reuse-x-forwarded support to mod-cluster filter and reverse-proxy handler

Add reuse-x-forwarded support to mod-cluster filter and reverse-proxy handler ----------------------------------------------------------------------------- Key: WFLY-13483 URL: https://issues.redhat.com/browse/WFLY-13483 Project: WildFly Issue Type: Enhancement Components: Web (Undertow) Affects Versions: 19.1.0.Final Reporter: Masafumi Miura Assignee: Brian Stansberry Priority: Major Undertow has setReuseXForwarded() method in the builder API of ModCluster and ProxyHandler to enable support to reuse X-Forwarded-* request headers (like X-Forwarded-For header). However, the undertow subsystem does not expose it as the configurable parameter of <mod-cluster> and <reverse-proxy>. This parameter is useful when the undertow load balance proxy is backed by another proxy server. In such a case, the front-end proxy adds X-Forwarded-* request headers to provide information about the original requester. The current implementation is unable to reuse it and overwrites it with its own information.