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https://issues.apache.org/jira/browse/CAMEL-25110?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claus Ibsen resolved CAMEL-25110.
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Resolution: Fixed
Fixed by https://github.com/apache/camel/pull/27016
> camel-core - Property placeholder parser: fix bugs found in a deep review
> -------------------------------------------------------------------------
>
> Key: CAMEL-25110
> URL: https://issues.apache.org/jira/browse/CAMEL-25110
> Project: Camel
> Issue Type: Bug
> Components: camel-core
> Reporter: Claus Ibsen
> Assignee: Claus Ibsen
> Priority: Minor
> Fix For: 4.23.0
>
>
> A review of the property placeholder parser (DefaultPropertiesParser) found
> these bugs:
> # The documented optional form of a properties function {{ {{env:?KEY}} }}
> always returns null for functions that do not look up the property first
> (env, sys, service, bean and the vault and kubernetes functions), even when
> the value exists, as the function is called with the key including the {{?}}.
> # The optional marker on the key of a function {{ {{?env:KEY}} }} is ignored,
> so a missing value fails.
> # With {{ignoreMissingProperty=true}} the internal marker {{@@[key]@@}} is
> returned instead of the unresolved placeholder {{ {{key}} }}, such as from
> {{CamelContext.resolvePropertyPlaceholders}} (used by the model and property
> binding).
> # A resolved value that ends with a backslash (such as a Windows path
> {{C:\temp\}}) escapes the next placeholder, as the resolved value is parsed
> again: {{ {{dir}}{{file}} }} fails with {{Missing {{ from the text:
> C:\temp\{{file}} }}.
> # With {{nestedPlaceholder=false}} the text before an unresolved optional
> placeholder is dropped ({{ abc{{?x}}def }} gives {{def}}).
> # With {{nestedPlaceholder=false}} an escaped backslash before a placeholder
> ({{ \\{{key}} }}) is not restored to a single backslash as documented.
> # The {{?nested=true|false}} option is removed from anywhere in the text
> (such as a query parameter of an endpoint uri), not only from the key of a
> placeholder.
> Not changed:
> * The resolved value reported for a key (dev console, summary) may be
> recorded for the wrong key when using nested placeholders or functions.
> * Default values are resolved before the key (so a default with a missing
> placeholder fails even when the key exists).
> _Claude Code on behalf of Claus Ibsen_
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