spring ServerDefaultCodecsImpl 源码
spring ServerDefaultCodecsImpl 代码
文件路径:/spring-web/src/main/java/org/springframework/http/codec/support/ServerDefaultCodecsImpl.java
/*
* Copyright 2002-2021 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.http.codec.support;
import java.util.List;
import org.springframework.core.codec.Encoder;
import org.springframework.http.codec.HttpMessageReader;
import org.springframework.http.codec.HttpMessageWriter;
import org.springframework.http.codec.ServerCodecConfigurer;
import org.springframework.http.codec.ServerSentEventHttpMessageWriter;
import org.springframework.http.codec.multipart.DefaultPartHttpMessageReader;
import org.springframework.http.codec.multipart.MultipartHttpMessageReader;
import org.springframework.http.codec.multipart.PartEventHttpMessageReader;
import org.springframework.http.codec.multipart.PartHttpMessageWriter;
import org.springframework.lang.Nullable;
/**
* Default implementation of {@link ServerCodecConfigurer.ServerDefaultCodecs}.
*
* @author Rossen Stoyanchev
*/
class ServerDefaultCodecsImpl extends BaseDefaultCodecs implements ServerCodecConfigurer.ServerDefaultCodecs {
@Nullable
private HttpMessageReader<?> multipartReader;
@Nullable
private Encoder<?> sseEncoder;
ServerDefaultCodecsImpl() {
}
ServerDefaultCodecsImpl(ServerDefaultCodecsImpl other) {
super(other);
this.multipartReader = other.multipartReader;
this.sseEncoder = other.sseEncoder;
}
@Override
public void multipartReader(HttpMessageReader<?> reader) {
this.multipartReader = reader;
initTypedReaders();
}
@Override
public void serverSentEventEncoder(Encoder<?> encoder) {
this.sseEncoder = encoder;
initObjectWriters();
}
@Override
protected void extendTypedReaders(List<HttpMessageReader<?>> typedReaders) {
if (this.multipartReader != null) {
addCodec(typedReaders, this.multipartReader);
}
else {
DefaultPartHttpMessageReader partReader = new DefaultPartHttpMessageReader();
addCodec(typedReaders, partReader);
addCodec(typedReaders, new MultipartHttpMessageReader(partReader));
}
addCodec(typedReaders, new PartEventHttpMessageReader());
}
@Override
protected void extendTypedWriters(List<HttpMessageWriter<?>> typedWriters) {
addCodec(typedWriters, new PartHttpMessageWriter());
}
@Override
protected void extendObjectWriters(List<HttpMessageWriter<?>> objectWriters) {
objectWriters.add(new ServerSentEventHttpMessageWriter(getSseEncoder()));
}
@Nullable
private Encoder<?> getSseEncoder() {
return this.sseEncoder != null ? this.sseEncoder :
jackson2Present ? getJackson2JsonEncoder() :
kotlinSerializationJsonPresent ? getKotlinSerializationJsonEncoder() :
null;
}
}
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