[backport camel-4.14.x] CAMEL-23588: camel-undertow - filter the legacy websocket.* exchange-header prefix#23993
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oscerd merged 1 commit intoJun 12, 2026
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…filter the legacy websocket.* exchange-header prefix Backport to camel-4.14.x of the main-branch change (d5a717d). On 4.14.x the UndertowHeaderFilterStrategy is the (deprecated) DefaultHeaderFilterStrategy-based implementation, so the change is adapted rather than copied verbatim: the existing initialize() now adds the legacy websocket.* prefix to the in/out filter prefixes (alongside Camel/camel). The lowerCase fallback in DefaultHeaderFilterStrategy.doFiltering matches the prefix case-insensitively, giving behaviour equivalent to main. Documents the change in the 4.14 upgrade guide alongside the CAMEL-23532 websocket family.
davsclaus
approved these changes
Jun 12, 2026
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Backport to
camel-4.14.xof CAMEL-23588 (main commitd5a717dd0f8).Note: adapted, not a verbatim backport
On
camel-4.14.x,UndertowHeaderFilterStrategyis the@deprecatedimplementation extendingDefaultHeaderFilterStrategy(on main / 4.18.x it was rewritten to extendHttpHeaderFilterStrategy). A verbatim cherry-pick is therefore impossible. The change is adapted to 4.14.x's structure: the existinginitialize()now adds the legacywebsocket.prefix to the in/out filter prefixes (alongsideCamel/camel).The
DefaultHeaderFilterStrategy.doFilteringlowerCasefallback matches the prefix case-insensitively, sowebsocket.*headers (in any case) are filtered in both directions — behaviour equivalent to main.Changes
UndertowHeaderFilterStrategy: addWEBSOCKET_FILTER_STARTS_WITH = "websocket."and include it insetOutFilterStartsWith/setInFilterStartsWith.camel-4x-upgrade-guide-4_14.adoc: add thecamel-undertow"potential breaking change" entry, grouped with the existingcamel-vertx-websocket/camel-atmosphere-websocket(CAMEL-23532) family.The matching entry will be synced to the
4_14upgrade guide onmainin a separate doc-sync PR, per the upgrade-guide policy.Claude Code on behalf of Andrea Cosentino