[CAMEL-16077] camel-undertow - not respect content-type specified by REST DSL produces when body returns null

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.7.1
• Fix Version/s: 3.8.0
• Component/s: camel-undertow
• Estimated Complexity: Unknown
• Assignee: Tadayoshi Sato
• Reporter: Tadayoshi Sato
• Created: 25/Jan/21 06:07
• Updated: 26/Jan/21 04:18
• Resolved: 26/Jan/21 03:14

Description

camel-undertow ignores content-type specified by REST DSL produces ("application/json") and always returns "text/plain" when the exchange body returned from the REST endpoint is null:

    <camelContext id="camel" xmlns="http://camel.apache.org/schema/spring">
        <restConfiguration bindingMode="auto" component="undertow"
            contextPath="test" host="localhost" port="8005"/>
        <rest id="rest-0b0215bd-f133-46f8-968c-4fe21ba4af4f" path="demo">
            <get id="get-1" produces="application/json" uri="/ping">
                <description>direct:hello</description>
                <route>
                    <to uri="direct:hello"/>
                </route>
            </get>
        </rest>
        <route id="simple-route">
            <from id="_from1" uri="direct:hello"/>
            <setBody id="_setBody1">
                <simple>${null}</simple>
            </setBody>
            <log id="route-log" message=">>> ${body}"/>
        </route>
    </camelContext>

This behaviour doesn't align with camel-jetty & REST DSL or bare undertow server.

Issue Links

• links to: GitHub Pull Request #4923