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https://issues.apache.org/jira/browse/CAMEL-26470?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adriano Machado updated CAMEL-26470:
------------------------------------
Description:
Tier 2 item of CAMEL-25132. PatternHelper.matchPattern compiles a regular
expression for every name that is not an exact or wildcard match, so
{{removeHeaders("Camel*")}}, which the security checklist recommends, compiles
one per remaining header on every exchange. The ticket measured about 930 ns
and 7.6 KB per exchange with 12 headers.
A pattern without regex metacharacters cannot match anything beyond the exact
and wildcard checks, except that a trailing {{*}} also means zero or more of
the previous character, so {{Camel*}} matches the name {{Came}}. Such patterns
can skip the compile unless the name has exactly that shape. Other patterns
still compile, and the matching result must not change.
_Claude Code on behalf of Adriano Machado (@ammachado)_
_This was generated by an AI agent and may contain inaccuracies. Please verify
before relying on it._
was:
Tier 2 item of CAMEL\-25132. PatternHelper.matchPattern compiles a regular
expression for every name that is not an exact or wildcard match, so
removeHeaders\("Camel\*"\), which the security checklist recommends, compiles
one per remaining header on every exchange. The ticket measured about 930 ns
and 7.6 KB per exchange with 12 headers.
A pattern without regex metacharacters cannot match anything beyond the exact
and wildcard checks, except that a trailing \* also means zero or more of the
previous character, so Camel\* matches the name Came. Such patterns can skip
the compile unless the name has exactly that shape. Other patterns still
compile, and the matching result must not change.
_Claude Code on behalf of Adriano Machado \(@ammachado\)_
_This was generated by an AI agent and may contain inaccuracies. Please verify
before relying on it._
> camel-support - PatternHelper: do not compile a regular expression for a
> pattern without metacharacters
> -------------------------------------------------------------------------------------------------------
>
> Key: CAMEL-26470
> URL: https://issues.apache.org/jira/browse/CAMEL-26470
> Project: Camel
> Issue Type: Sub-task
> Reporter: Adriano Machado
> Assignee: Adriano Machado
> Priority: Major
> Fix For: 4.24.0
>
>
> Tier 2 item of CAMEL-25132. PatternHelper.matchPattern compiles a regular
> expression for every name that is not an exact or wildcard match, so
> {{removeHeaders("Camel*")}}, which the security checklist recommends,
> compiles one per remaining header on every exchange. The ticket measured
> about 930 ns and 7.6 KB per exchange with 12 headers.
> A pattern without regex metacharacters cannot match anything beyond the exact
> and wildcard checks, except that a trailing {{*}} also means zero or more of
> the previous character, so {{Camel*}} matches the name {{Came}}. Such
> patterns can skip the compile unless the name has exactly that shape. Other
> patterns still compile, and the matching result must not change.
> _Claude Code on behalf of Adriano Machado (@ammachado)_
> _This was generated by an AI agent and may contain inaccuracies. Please
> verify before relying on it._
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