How to exclude mime-types from compression?

[lglowania]

Jetty Version
12.1.6
Jetty Environment
ee11
Java Version
25
Question

I'm trying to exclude mime-types from gzip-compression via jetty-compression.xml:

<?xml version="1.0"?>
<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN"
        "https://jetty.org/configure_10_0.dtd">

<Configure id="Server" class="org.eclipse.jetty.server.Server">
	<Call name="insertHandler">
		<Arg>
			<New class="org.eclipse.jetty.compression.server.CompressionHandler">
				<Call name="putConfiguration">
					<Arg>/*</Arg>
					<Arg>
						<Call
							class="org.eclipse.jetty.compression.server.CompressionConfig"
							name="builder">
							<Call name="compressExcludeMimeType">
								<Arg>audio/mp4</Arg>
							</Call>
							<Call name="compressExcludeMimeType">
								<Arg>audio/ogg</Arg>
							</Call>							
							<Call name="build" />
						</Call>
					</Arg>
				</Call>
			</New>
		</Arg>
	</Call>
</Configure>

The error i get is:

aused by: java.lang.RuntimeException: java.lang.IllegalStateException: No Method: <Call name="putConfiguration"><Arg>/*</Arg><Arg>
            
            <Call class="org.eclipse.jetty.compression.server.CompressionConfig" name="builder"><Call name="compressExcludeMimeType"><Arg>audio/mp4</Arg></Call><Call name="compressExcludeMimeType"><Arg>audio/ogg</Arg></Call><Call name="compressExcludeMimeType"><Arg>audio/flac</Arg></Call><Call name="build"/></Call>
            
          </Arg></Call> on class org.eclipse.jetty.compression.server.CompressionHandler
...
Caused by: java.lang.NoSuchMethodException: oejcs.CompressionHandler@4c4d362a{STOPPED,supported=} . putConfiguration(oejx.XmlConfiguration$JettyXmlConfiguration$Args@5400db36[null, null][/*, org.eclipse.jetty.compression.server.CompressionConfig$Builder@76b74e9c])
	at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.call(XmlConfiguration.java:1113)
	at org.eclipse.jetty.xml.XmlConfiguration$JettyXmlConfiguration.call(XmlConfiguration.java:1070)
	... 16 more

So instead of the CompressionConfig, it uses the CompressionConfig$Builder. How can i use that Builder-pattern in jetty-IOC correctly?

[sbordet]

The problem is that <Call name="build" /> is nested inside <Call class="org.eclipse.jetty.compression.server.CompressionConfig" name="builder">, so it is the builder that is passed as argument, and not the CompressionConfig, so you have a mismatch in the signature.

You can move the creation of the configuration outside the arguments, and then reference the CompressionConfig in this way:

<Configure id="Server" class="org.eclipse.jetty.server.Server">
  <Call name="insertHandler">
    <Arg>
      <New id="CompressionHandler" class="org.eclipse.jetty.compression.server.CompressionHandler">
        <!-- Prepare the configuration -->
        <Call class="org.eclipse.jetty.compression.server.CompressionConfig" name="builder">
          <Call name="compressExcludeMimeType">
            <Arg>audio/mp4</Arg>
          </Call>
          <Call name="compressExcludeMimeType">
            <Arg>audio/ogg</Arg>
          </Call>
          <!-- Store the result of the call to build() to "cfg" -->
          <Call id="cfg" name="build" />
        </Call>
        <Call name="putConfiguration">
          <Arg>/*</Arg>
          <Arg>
            <!-- Use the "cfg" reference -->
            <Ref refid="cfg" />
          </Arg>
        </Call>
      </New>
    </Arg>
  </Call>
</Configure>