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io.micronaut.http.netty.body.NettyJsonHandler Maven / Gradle / Ivy
/*
* Copyright 2017-2023 original 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 io.micronaut.http.netty.body;
import io.micronaut.context.annotation.BootstrapContextCompatible;
import io.micronaut.context.annotation.Replaces;
import io.micronaut.context.annotation.Requires;
import io.micronaut.core.annotation.Internal;
import io.micronaut.core.annotation.NonNull;
import io.micronaut.core.annotation.Order;
import io.micronaut.core.io.buffer.ByteBuffer;
import io.micronaut.core.io.buffer.ByteBufferFactory;
import io.micronaut.core.type.Argument;
import io.micronaut.core.type.Headers;
import io.micronaut.core.type.MutableHeaders;
import io.micronaut.http.HttpRequest;
import io.micronaut.http.MediaType;
import io.micronaut.http.MutableHttpResponse;
import io.micronaut.http.body.ChunkedMessageBodyReader;
import io.micronaut.http.body.MessageBodyHandler;
import io.micronaut.http.body.MessageBodyWriter;
import io.micronaut.http.codec.CodecException;
import io.micronaut.http.netty.NettyHttpHeaders;
import io.micronaut.json.JsonFeatures;
import io.micronaut.json.JsonMapper;
import io.micronaut.json.body.JsonMessageHandler;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufOutputStream;
import io.netty.handler.codec.http.DefaultFullHttpResponse;
import io.netty.handler.codec.http.EmptyHttpHeaders;
import io.netty.handler.codec.http.HttpHeaderNames;
import io.netty.handler.codec.http.HttpResponseStatus;
import io.netty.handler.codec.http.HttpVersion;
import jakarta.inject.Singleton;
import org.reactivestreams.Publisher;
import reactor.core.publisher.Flux;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* Replacement for {@link JsonMessageHandler} with {@link ChunkedMessageBodyReader} support.
*
* @param The type
*/
@Order(JsonMessageHandler.ORDER)
@Singleton
@Internal
@Replaces(JsonMessageHandler.class)
@JsonMessageHandler.ProducesJson
@JsonMessageHandler.ConsumesJson
@BootstrapContextCompatible
@Requires(beans = JsonMapper.class)
public final class NettyJsonHandler implements MessageBodyHandler, ChunkedMessageBodyReader, CustomizableNettyJsonHandler, NettyBodyWriter {
private final JsonMessageHandler jsonMessageHandler;
public NettyJsonHandler(JsonMapper jsonMapper) {
this(new JsonMessageHandler<>(jsonMapper));
}
private NettyJsonHandler(JsonMessageHandler jsonMessageHandler) {
this.jsonMessageHandler = jsonMessageHandler;
}
@Override
public CustomizableNettyJsonHandler customize(JsonFeatures jsonFeatures) {
return new NettyJsonHandler<>(jsonMessageHandler.getJsonMapper().cloneWithFeatures(jsonFeatures));
}
@Override
public Publisher readChunked(Argument type, MediaType mediaType, Headers httpHeaders, Publisher> input) {
JsonChunkedProcessor processor = new JsonChunkedProcessor();
if (Iterable.class.isAssignableFrom(type.getType())) {
// Publisher> is parsed as a single item of type List
processor.counter.noTokenization();
} else {
// Publisher is unwrapped
processor.counter.unwrapTopLevelArray();
}
return processor.process(Flux.from(input).map(bb -> {
if (!(bb.asNativeBuffer() instanceof ByteBuf buf)) {
throw new IllegalArgumentException("Only netty buffers are supported");
}
return buf;
})).map(bb -> read(type, mediaType, httpHeaders, bb));
}
@Override
public boolean isReadable(Argument type, MediaType mediaType) {
return jsonMessageHandler.isReadable(type, mediaType);
}
@Override
public T read(Argument type, MediaType mediaType, Headers httpHeaders, ByteBuffer byteBuffer) throws CodecException {
return jsonMessageHandler.read(type, mediaType, httpHeaders, byteBuffer);
}
@Override
public T read(Argument type, MediaType mediaType, Headers httpHeaders, InputStream inputStream) throws CodecException {
return jsonMessageHandler.read(type, mediaType, httpHeaders, inputStream);
}
@Override
public boolean isWriteable(Argument type, MediaType mediaType) {
return jsonMessageHandler.isWriteable(type, mediaType);
}
@Override
public void writeTo(Argument type, MediaType mediaType, T object, MutableHeaders outgoingHeaders, OutputStream outputStream) throws CodecException {
jsonMessageHandler.writeTo(type, mediaType, object, outgoingHeaders, outputStream);
}
@Override
public ByteBuffer writeTo(Argument type, MediaType mediaType, T object, MutableHeaders outgoingHeaders, ByteBufferFactory bufferFactory) throws CodecException {
return jsonMessageHandler.writeTo(type, mediaType, object, outgoingHeaders, bufferFactory);
}
@Override
public void writeTo(@NonNull HttpRequest request, @NonNull MutableHttpResponse outgoingResponse, @NonNull Argument type, @NonNull MediaType mediaType, @NonNull T object, @NonNull NettyWriteContext nettyContext) throws CodecException {
NettyHttpHeaders nettyHttpHeaders = (NettyHttpHeaders) outgoingResponse.getHeaders();
nettyHttpHeaders.setIfMissing(HttpHeaderNames.CONTENT_TYPE, mediaType);
ByteBuf buffer = nettyContext.alloc().buffer();
JsonMapper jsonMapper = jsonMessageHandler.getJsonMapper();
try {
jsonMapper.writeValue(new ByteBufOutputStream(buffer), object);
} catch (IOException e) {
buffer.release();
throw new CodecException("Error encoding object [" + object + "] to JSON: " + e.getMessage(), e);
}
nettyContext.writeFull(new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.valueOf(outgoingResponse.code(), outgoingResponse.reason()), buffer, nettyHttpHeaders.getNettyHeaders(), EmptyHttpHeaders.INSTANCE));
}
@Override
public MessageBodyWriter createSpecific(Argument type) {
return new NettyJsonHandler<>(jsonMessageHandler.createSpecific(type));
}
@Override
public boolean isBlocking() {
return jsonMessageHandler.isBlocking();
}
}
