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Make SourceHttpMessageConverter optional

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As a follow-up to gh-29277, and since the JAXB support is now
triggered by the classpath presence of a JAXB implementation,
it makes sense to make SourceHttpMessageConverter, previously
configured unconditionally, optional.

That makes a big difference on native (1M of RSS reduction
with current typical Spring Boot 3 arrangement, 3.4M when
other usages of XML are not reachable).

It also brings more consistency between Spring MVC
and Spring WebFlux, and means that XML support for
Spring web applications now needs to be enabled explicitly.

As a consequence, Spring web applications using
javax.xml.transform.Source now needs to configure
SourceHttpMessageConverter explicitly in RestTemplate or
Spring MVC.

Closes gh-29535
This commit is contained in:
Sébastien Deleuze
2022-11-21 16:36:37 +01:00
parent c1dfde5ba4
commit 1e98fb607a
9 changed files with 88 additions and 48 deletions
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8
spring-web/src/main/java/org/springframework/http/converter/support/AllEncompassingFormHttpMessageConverter.java
View File

@@ -26,7 +26,6 @@ import org.springframework.http.converter.protobuf.KotlinSerializationProtobufHt
import org.springframework.http.converter.smile.MappingJackson2SmileHttpMessageConverter;
import org.springframework.http.converter.xml.Jaxb2RootElementHttpMessageConverter;
import org.springframework.http.converter.xml.MappingJackson2XmlHttpMessageConverter;
import org.springframework.http.converter.xml.SourceHttpMessageConverter;
import org.springframework.util.ClassUtils;
/**
@@ -75,13 +74,6 @@ public class AllEncompassingFormHttpMessageConverter extends FormHttpMessageConv
public AllEncompassingFormHttpMessageConverter() {
try {
addPartConverter(new SourceHttpMessageConverter<>());
}
catch (Error err) {
// Ignore when no TransformerFactory implementation is available
}
if (jaxb2Present && !jackson2XmlPresent) {
addPartConverter(new Jaxb2RootElementHttpMessageConverter());
}

8
spring-web/src/main/java/org/springframework/web/client/RestTemplate.java
View File

@@ -66,7 +66,6 @@ import org.springframework.http.converter.smile.MappingJackson2SmileHttpMessageC
import org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter;
import org.springframework.http.converter.xml.Jaxb2RootElementHttpMessageConverter;
import org.springframework.http.converter.xml.MappingJackson2XmlHttpMessageConverter;
import org.springframework.http.converter.xml.SourceHttpMessageConverter;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
@@ -173,13 +172,6 @@ public class RestTemplate extends InterceptingHttpAccessor implements RestOperat
this.messageConverters.add(new StringHttpMessageConverter());
this.messageConverters.add(new ResourceHttpMessageConverter(false));
try {
this.messageConverters.add(new SourceHttpMessageConverter<>());
}
catch (Error err) {
// Ignore when no TransformerFactory implementation is available
}
this.messageConverters.add(new AllEncompassingFormHttpMessageConverter());
if (romePresent) {