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Add HttpMessageConverters
Prior to this commit, Spring Web would configure `HttpMessageConverter<?>` collections on clients like `RestTemplate` and on the server infrastructure, in `WebMvcConfigurationSupport`. This commit introduces a high-level construct for building and configuring ordered collections of converters. This includes: * configuration of well-known converters with classpath detection * configuration of shared converters, or client/server specific * configuration of custom converters See gh-33894
This commit is contained in:
Brian Clozel
+434
@@ -0,0 +1,434 @@
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/*
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* Copyright 2002-present the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.http.converter;
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import java.io.IOException;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.util.Collection;
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import java.util.HashSet;
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import java.util.Set;
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import java.util.stream.Stream;
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import java.util.stream.StreamSupport;
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import com.google.gson.Gson;
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import com.rometools.rome.feed.WireFeed;
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import jakarta.json.bind.Jsonb;
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import org.junit.jupiter.api.Nested;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.params.ParameterizedTest;
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import org.junit.jupiter.params.provider.Arguments;
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import org.junit.jupiter.params.provider.MethodSource;
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import tools.jackson.databind.ObjectMapper;
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import tools.jackson.dataformat.cbor.CBORMapper;
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import tools.jackson.dataformat.smile.SmileMapper;
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import tools.jackson.dataformat.xml.XmlMapper;
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import tools.jackson.dataformat.yaml.YAMLMapper;
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import org.springframework.core.SmartClassLoader;
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import org.springframework.http.HttpInputMessage;
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import org.springframework.http.HttpOutputMessage;
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import org.springframework.http.converter.cbor.JacksonCborHttpMessageConverter;
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import org.springframework.http.converter.cbor.KotlinSerializationCborHttpMessageConverter;
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import org.springframework.http.converter.cbor.MappingJackson2CborHttpMessageConverter;
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import org.springframework.http.converter.feed.AtomFeedHttpMessageConverter;
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import org.springframework.http.converter.feed.RssChannelHttpMessageConverter;
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import org.springframework.http.converter.json.GsonHttpMessageConverter;
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import org.springframework.http.converter.json.JacksonJsonHttpMessageConverter;
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import org.springframework.http.converter.json.JsonbHttpMessageConverter;
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import org.springframework.http.converter.json.KotlinSerializationJsonHttpMessageConverter;
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import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
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import org.springframework.http.converter.protobuf.KotlinSerializationProtobufHttpMessageConverter;
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import org.springframework.http.converter.smile.JacksonSmileHttpMessageConverter;
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import org.springframework.http.converter.smile.MappingJackson2SmileHttpMessageConverter;
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import org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter;
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import org.springframework.http.converter.xml.JacksonXmlHttpMessageConverter;
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import org.springframework.http.converter.xml.Jaxb2RootElementHttpMessageConverter;
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import org.springframework.http.converter.xml.MappingJackson2XmlHttpMessageConverter;
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import org.springframework.http.converter.yaml.JacksonYamlHttpMessageConverter;
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import org.springframework.http.converter.yaml.MappingJackson2YamlHttpMessageConverter;
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import static org.assertj.core.api.Assertions.assertThat;
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import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
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/**
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* Tests for {@link DefaultHttpMessageConverters}.
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*/
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@SuppressWarnings("removal")
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class DefaultHttpMessageConvertersTests {
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@ParameterizedTest
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@MethodSource("emptyMessageConverters")
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void emptyConverters(Iterable<HttpMessageConverter<?>> converters) {
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assertThat(converters).isEmpty();
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}
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static Stream<Arguments> emptyMessageConverters() {
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return Stream.of(
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Arguments.of(HttpMessageConverters.create().build().forClient()),
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Arguments.of(HttpMessageConverters.create().build().forServer())
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);
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}
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@Test
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void clientAndServerConvertersAreShared() {
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var converters = HttpMessageConverters.withDefaults().build();
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Set<HttpMessageConverter<?>> allConverters = new HashSet<>();
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converters.forClient().forEach(allConverters::add);
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converters.forServer().forEach(allConverters::add);
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assertThat(allConverters).hasSize(15);
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}
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@Test
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void failsWhenStringConverterDoesNotSupportMediaType() {
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assertThatIllegalArgumentException().isThrownBy(() ->
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HttpMessageConverters.create().stringMessageConverter(new CustomHttpMessageConverter()).build())
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.withMessage("stringMessageConverter should support 'text/plain'");
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}
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@Test
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void failsWhenJsonConverterDoesNotSupportMediaType() {
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assertThatIllegalArgumentException().isThrownBy(() ->
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HttpMessageConverters.create().jsonMessageConverter(new CustomHttpMessageConverter()).build())
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.withMessage("jsonMessageConverter should support 'application/json'");
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}
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@Test
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void failsWhenXmlConverterDoesNotSupportMediaType() {
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assertThatIllegalArgumentException().isThrownBy(() ->
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HttpMessageConverters.create().xmlMessageConverter(new CustomHttpMessageConverter()).build())
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.withMessage("xmlMessageConverter should support 'text/xml'");
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}
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@Test
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void failsWhenSmileConverterDoesNotSupportMediaType() {
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assertThatIllegalArgumentException().isThrownBy(() ->
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HttpMessageConverters.create().smileMessageConverter(new CustomHttpMessageConverter()).build())
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.withMessage("smileMessageConverter should support 'application/x-jackson-smile'");
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}
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@Test
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void failsWhenCborConverterDoesNotSupportMediaType() {
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assertThatIllegalArgumentException().isThrownBy(() ->
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HttpMessageConverters.create().cborMessageConverter(new CustomHttpMessageConverter()).build())
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.withMessage("cborMessageConverter should support 'application/cbor'");
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}
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@Test
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void failsWhenYamlConverterDoesNotSupportMediaType() {
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assertThatIllegalArgumentException().isThrownBy(() ->
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HttpMessageConverters.create().yamlMessageConverter(new CustomHttpMessageConverter()).build())
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.withMessage("yamlMessageConverter should support 'application/yaml'");
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}
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@Nested
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class ClientConvertersTests {
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@Test
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void defaultConverters() {
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var converters = HttpMessageConverters.withDefaults().build();
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assertThat(converters.forClient()).hasExactlyElementsOfTypes(ByteArrayHttpMessageConverter.class,
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StringHttpMessageConverter.class, ResourceHttpMessageConverter.class,
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AllEncompassingFormHttpMessageConverter.class,
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JacksonJsonHttpMessageConverter.class, JacksonSmileHttpMessageConverter.class,
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JacksonCborHttpMessageConverter.class, JacksonYamlHttpMessageConverter.class,
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JacksonXmlHttpMessageConverter.class, KotlinSerializationProtobufHttpMessageConverter.class,
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AtomFeedHttpMessageConverter.class, RssChannelHttpMessageConverter.class);
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}
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@Test
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void multipartConverterContainsOtherConverters() {
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var converters = HttpMessageConverters.withDefaults().build();
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AllEncompassingFormHttpMessageConverter multipartConverter = findMessageConverter(AllEncompassingFormHttpMessageConverter.class, converters.forClient());
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assertThat(multipartConverter.getPartConverters()).hasExactlyElementsOfTypes(
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ByteArrayHttpMessageConverter.class, StringHttpMessageConverter.class,
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ResourceHttpMessageConverter.class, JacksonJsonHttpMessageConverter.class,
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JacksonSmileHttpMessageConverter.class, JacksonCborHttpMessageConverter.class,
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JacksonYamlHttpMessageConverter.class, JacksonXmlHttpMessageConverter.class,
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KotlinSerializationProtobufHttpMessageConverter.class, AtomFeedHttpMessageConverter.class,
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RssChannelHttpMessageConverter.class);
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}
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@Test
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void registerCustomMessageConverter() {
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var converters = HttpMessageConverters.create()
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.additionalMessageConverter(new CustomHttpMessageConverter()).build();
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assertThat(converters.forClient()).hasExactlyElementsOfTypes(AllEncompassingFormHttpMessageConverter.class, CustomHttpMessageConverter.class);
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}
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@Test
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void registerCustomConverterInMultipartConverter() {
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var converters = HttpMessageConverters.withDefaults()
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.additionalMessageConverter(new CustomHttpMessageConverter()).build();
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AllEncompassingFormHttpMessageConverter multipartConverter = findMessageConverter(AllEncompassingFormHttpMessageConverter.class, converters.forClient());
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assertThat(multipartConverter.getPartConverters()).hasAtLeastOneElementOfType(CustomHttpMessageConverter.class);
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}
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@Test
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void shouldUseServerSpecificConverter() {
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JacksonJsonHttpMessageConverter jacksonConverter = new JacksonJsonHttpMessageConverter();
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var converters = HttpMessageConverters.withDefaults()
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.configureClient(configurer -> configurer.jsonMessageConverter(jacksonConverter)).build();
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JacksonJsonHttpMessageConverter customConverter = findMessageConverter(JacksonJsonHttpMessageConverter.class, converters.forClient());
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assertThat(customConverter).isEqualTo(jacksonConverter);
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}
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@Test
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void shouldConfigureConverter() {
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CustomHttpMessageConverter customConverter = new CustomHttpMessageConverter();
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var converters = HttpMessageConverters.withDefaults()
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.additionalMessageConverter(customConverter)
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.configureClient(configurer -> {
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configurer.configureClientMessageConverters(converter -> {
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if (converter instanceof CustomHttpMessageConverter custom) {
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custom.processed = true;
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}
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});
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}).build();
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assertThat(customConverter.processed).isTrue();
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}
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}
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@Nested
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class ServerConvertersTests {
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@Test
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void defaultConverters() {
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var converters = HttpMessageConverters.withDefaults().build();
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assertThat(converters.forServer()).hasExactlyElementsOfTypes(
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ByteArrayHttpMessageConverter.class, StringHttpMessageConverter.class,
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ResourceHttpMessageConverter.class, ResourceRegionHttpMessageConverter.class,
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JacksonJsonHttpMessageConverter.class, JacksonSmileHttpMessageConverter.class,
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JacksonCborHttpMessageConverter.class, JacksonYamlHttpMessageConverter.class,
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JacksonXmlHttpMessageConverter.class, KotlinSerializationProtobufHttpMessageConverter.class,
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AtomFeedHttpMessageConverter.class, RssChannelHttpMessageConverter.class,
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AllEncompassingFormHttpMessageConverter.class);
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}
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@Test
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void multipartConverterContainsOtherConverters() {
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var converters = HttpMessageConverters.withDefaults().build();
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AllEncompassingFormHttpMessageConverter multipartConverter = findMessageConverter(AllEncompassingFormHttpMessageConverter.class, converters.forServer());
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assertThat(multipartConverter.getPartConverters()).hasExactlyElementsOfTypes(
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ByteArrayHttpMessageConverter.class, StringHttpMessageConverter.class,
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ResourceHttpMessageConverter.class, JacksonJsonHttpMessageConverter.class,
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JacksonSmileHttpMessageConverter.class, JacksonCborHttpMessageConverter.class,
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JacksonYamlHttpMessageConverter.class, JacksonXmlHttpMessageConverter.class,
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KotlinSerializationProtobufHttpMessageConverter.class, AtomFeedHttpMessageConverter.class,
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RssChannelHttpMessageConverter.class);
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}
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@Test
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void registerCustomMessageConverter() {
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var converters = HttpMessageConverters.create()
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.additionalMessageConverter(new CustomHttpMessageConverter()).build();
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assertThat(converters.forServer()).hasExactlyElementsOfTypes(CustomHttpMessageConverter.class, AllEncompassingFormHttpMessageConverter.class);
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}
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@Test
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void registerCustomConverterInMultipartConverter() {
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var converters = HttpMessageConverters.withDefaults()
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.additionalMessageConverter(new CustomHttpMessageConverter()).build();
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AllEncompassingFormHttpMessageConverter multipartConverter = findMessageConverter(AllEncompassingFormHttpMessageConverter.class, converters.forServer());
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assertThat(multipartConverter.getPartConverters()).hasAtLeastOneElementOfType(CustomHttpMessageConverter.class);
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}
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@Test
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void shouldUseServerSpecificConverter() {
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JacksonJsonHttpMessageConverter jacksonConverter = new JacksonJsonHttpMessageConverter();
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var converters = HttpMessageConverters.withDefaults()
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.configureServer(configurer -> configurer.jsonMessageConverter(jacksonConverter)).build();
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JacksonJsonHttpMessageConverter customConverter = findMessageConverter(JacksonJsonHttpMessageConverter.class, converters.forServer());
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assertThat(customConverter).isEqualTo(jacksonConverter);
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}
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@Test
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void shouldConfigureConverter() {
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CustomHttpMessageConverter customConverter = new CustomHttpMessageConverter();
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var converters = HttpMessageConverters.withDefaults()
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.additionalMessageConverter(customConverter)
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.configureServer(configurer -> {
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configurer.configureServerMessageConverters(converter -> {
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if (converter instanceof CustomHttpMessageConverter custom) {
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custom.processed = true;
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}
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});
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}).build();
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assertThat(customConverter.processed).isTrue();
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}
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}
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@Nested
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class ClasspathDetectionTests {
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@Test
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void jsonUsesJackson2WhenJacksonNotPresent() {
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var classLoader = new FilteredClassLoader(ObjectMapper.class);
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var converters = new DefaultHttpMessageConverters.DefaultBuilder(true, classLoader).build();
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assertThat(converters.forServer()).hasAtLeastOneElementOfType(MappingJackson2HttpMessageConverter.class)
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.doesNotHaveAnyElementsOfTypes(JacksonJsonHttpMessageConverter.class);
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}
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@Test
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void jsonUsesGsonWhenJacksonNotPresent() {
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var classLoader = new FilteredClassLoader(ObjectMapper.class, com.fasterxml.jackson.databind.ObjectMapper.class);
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var converters = new DefaultHttpMessageConverters.DefaultBuilder(true, classLoader).build();
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assertThat(converters.forServer()).hasAtLeastOneElementOfType(GsonHttpMessageConverter.class)
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.doesNotHaveAnyElementsOfTypes(JacksonJsonHttpMessageConverter.class, MappingJackson2HttpMessageConverter.class);
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}
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@Test
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void jsonUsesJsonbWhenJacksonAndGsonNotPresent() {
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var classLoader = new FilteredClassLoader(ObjectMapper.class, com.fasterxml.jackson.databind.ObjectMapper.class, Gson.class);
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var converters = new DefaultHttpMessageConverters.DefaultBuilder(true, classLoader).build();
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assertThat(converters.forServer()).hasAtLeastOneElementOfType(JsonbHttpMessageConverter.class)
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.doesNotHaveAnyElementsOfTypes(JacksonJsonHttpMessageConverter.class, MappingJackson2HttpMessageConverter.class,
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GsonHttpMessageConverter.class);
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}
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@Test
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void jsonUsesKotlinWhenOthersNotPresent() {
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var classLoader = new FilteredClassLoader(ObjectMapper.class, com.fasterxml.jackson.databind.ObjectMapper.class, Gson.class, Jsonb.class);
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var converters = new DefaultHttpMessageConverters.DefaultBuilder(true, classLoader).build();
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assertThat(converters.forServer()).hasAtLeastOneElementOfType(KotlinSerializationJsonHttpMessageConverter.class)
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.doesNotHaveAnyElementsOfTypes(JacksonJsonHttpMessageConverter.class, MappingJackson2HttpMessageConverter.class,
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GsonHttpMessageConverter.class, JsonbHttpMessageConverter.class);
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}
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@Test
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void xmlUsesJackson2WhenJacksonNotPresent() {
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var classLoader = new FilteredClassLoader(XmlMapper.class);
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var converters = new DefaultHttpMessageConverters.DefaultBuilder(true, classLoader).build();
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assertThat(converters.forServer()).hasAtLeastOneElementOfType(MappingJackson2XmlHttpMessageConverter.class)
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.doesNotHaveAnyElementsOfTypes(JacksonXmlHttpMessageConverter.class);
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}
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@Test
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void xmlUsesJaxbWhenJacksonNotPresent() {
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var classLoader = new FilteredClassLoader(XmlMapper.class, com.fasterxml.jackson.dataformat.xml.XmlMapper.class);
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var converters = new DefaultHttpMessageConverters.DefaultBuilder(true, classLoader).build();
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assertThat(converters.forServer()).hasAtLeastOneElementOfType(Jaxb2RootElementHttpMessageConverter.class)
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.doesNotHaveAnyElementsOfTypes(JacksonXmlHttpMessageConverter.class, MappingJackson2XmlHttpMessageConverter.class);
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}
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@Test
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void smileUsesJackson2WhenJacksonNotPresent() {
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var classLoader = new FilteredClassLoader(SmileMapper.class);
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var converters = new DefaultHttpMessageConverters.DefaultBuilder(true, classLoader).build();
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assertThat(converters.forServer()).hasAtLeastOneElementOfType(MappingJackson2SmileHttpMessageConverter.class)
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.doesNotHaveAnyElementsOfTypes(JacksonSmileHttpMessageConverter.class);
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}
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@Test
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void cborUsesJackson2WhenJacksonNotPresent() {
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var classLoader = new FilteredClassLoader(CBORMapper.class);
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var converters = new DefaultHttpMessageConverters.DefaultBuilder(true, classLoader).build();
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assertThat(converters.forServer()).hasAtLeastOneElementOfType(MappingJackson2CborHttpMessageConverter.class)
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.doesNotHaveAnyElementsOfTypes(JacksonCborHttpMessageConverter.class);
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}
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@Test
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void cborUsesKotlinWhenJacksonNotPresent() {
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var classLoader = new FilteredClassLoader(CBORMapper.class, com.fasterxml.jackson.dataformat.cbor.CBORFactory.class);
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var converters = new DefaultHttpMessageConverters.DefaultBuilder(true, classLoader).build();
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assertThat(converters.forServer()).hasAtLeastOneElementOfType(KotlinSerializationCborHttpMessageConverter.class)
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.doesNotHaveAnyElementsOfTypes(JacksonCborHttpMessageConverter.class, MappingJackson2CborHttpMessageConverter.class);
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}
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@Test
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void yamlUsesJackson2WhenJacksonNotPresent() {
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var classLoader = new FilteredClassLoader(YAMLMapper.class);
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var converters = new DefaultHttpMessageConverters.DefaultBuilder(true, classLoader).build();
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assertThat(converters.forServer()).hasAtLeastOneElementOfType(MappingJackson2YamlHttpMessageConverter.class)
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.doesNotHaveAnyElementsOfTypes(JacksonYamlHttpMessageConverter.class);
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}
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@Test
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void atomAndRssNotConfiguredWhenRomeNotPresent() {
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var classLoader = new FilteredClassLoader(WireFeed.class);
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var converters = new DefaultHttpMessageConverters.DefaultBuilder(true, classLoader).build();
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assertThat(converters.forServer()).doesNotHaveAnyElementsOfTypes(AtomFeedHttpMessageConverter.class, RssChannelHttpMessageConverter.class);
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}
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}
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@SuppressWarnings("unchecked")
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private <T> T findMessageConverter(Class<T> converterType, Iterable<HttpMessageConverter<?>> converters) {
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return (T) StreamSupport
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.stream(converters.spliterator(), false)
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.filter(converter -> converter.getClass().equals(converterType))
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.findFirst().orElseThrow();
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}
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static class FilteredClassLoader extends URLClassLoader implements SmartClassLoader {
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private final Collection<Class<?>> hiddenClasses;
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public FilteredClassLoader(Class<?>... hiddenClasses) {
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this(java.util.Arrays.asList(hiddenClasses));
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}
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FilteredClassLoader(Collection<Class<?>> hiddenClasses) {
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super(new URL[0], FilteredClassLoader.class.getClassLoader());
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this.hiddenClasses = hiddenClasses;
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}
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@Override
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protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
|
||||
for (Class<?> hiddenClass : this.hiddenClasses) {
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||||
if (hiddenClass.getName().equals(name)) {
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throw new ClassNotFoundException();
|
||||
}
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}
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return super.loadClass(name, resolve);
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}
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}
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static class CustomHttpMessageConverter extends AbstractHttpMessageConverter<Object> {
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boolean processed = false;
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||||
@Override
|
||||
protected boolean supports(Class<?> clazz) {
|
||||
return false;
|
||||
}
|
||||
|
||||
@Override
|
||||
protected Object readInternal(Class<?> clazz, HttpInputMessage inputMessage) throws IOException, HttpMessageNotReadableException {
|
||||
return null;
|
||||
}
|
||||
|
||||
@Override
|
||||
protected void writeInternal(Object o, HttpOutputMessage outputMessage) throws IOException, HttpMessageNotWritableException {
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
Reference in New Issue
Block a user