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https://issues.apache.org/jira/browse/CAMEL-19383?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claus Ibsen resolved CAMEL-19383.
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Resolution: Fixed
> camel-jslt: allowTemplateFromHeader ignores header on subsequent exchanges
> --------------------------------------------------------------------------
>
> Key: CAMEL-19383
> URL: https://issues.apache.org/jira/browse/CAMEL-19383
> Project: Camel
> Issue Type: Bug
> Affects Versions: 3.20.4, 4.0-M3
> Reporter: Jacek Szymański
> Priority: Major
> Fix For: 3.20.6, 3.21.0, 4.0-RC1, 4.0
>
>
> When allowTemplateFromHeader is set, the endpoint will remember the first
> header expression that is set and use it for any subsequent exchange, even if
> it brings a different expression in its header.
> That is:
> {{template.sendBodyAndHeader("direct:start", TEST_BODY,}}
> {{JsltConstants.HEADER_JSLT_STRING, ".foo");}}
> {{template.sendBodyAndHeader("direct:start", TEST_BODY,}}
> {{JsltConstants.HEADER_JSLT_STRING, ".bar");}}
> will both use the expression .foo and the expression .bar will be ignored.
>
> Also, if resource is set on the URI, it will ignore any expressions from
> header despite allowTemplateFromHeader, unless it was set on the first
> exchange, in which case it will be used for all exchanges, even those without
> the header set.
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