/*
 * Copyright 2002-2018 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
 *
 *      http://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.
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package org.springframework.http.server.reactive;

import java.net.URISyntaxException;
import java.util.function.BiFunction;

import io.netty.handler.codec.http.HttpResponseStatus;
import org.apache.commons.logging.Log;
import reactor.core.publisher.Mono;
import reactor.netty.http.server.HttpServerRequest;
import reactor.netty.http.server.HttpServerResponse;

import org.springframework.core.io.buffer.NettyDataBufferFactory;
import org.springframework.http.HttpLogging;
import org.springframework.http.HttpMethod;
import org.springframework.util.Assert;

Adapt HttpHandler to the Reactor Netty channel handling function.
Author:Stephane Maldini, Rossen Stoyanchev
Since:5.0
/** * Adapt {@link HttpHandler} to the Reactor Netty channel handling function. * * @author Stephane Maldini * @author Rossen Stoyanchev * @since 5.0 */
public class ReactorHttpHandlerAdapter implements BiFunction<HttpServerRequest, HttpServerResponse, Mono<Void>> { private static final Log logger = HttpLogging.forLogName(ReactorHttpHandlerAdapter.class); private final HttpHandler httpHandler; public ReactorHttpHandlerAdapter(HttpHandler httpHandler) { Assert.notNull(httpHandler, "HttpHandler must not be null"); this.httpHandler = httpHandler; } @Override public Mono<Void> apply(HttpServerRequest reactorRequest, HttpServerResponse reactorResponse) { NettyDataBufferFactory bufferFactory = new NettyDataBufferFactory(reactorResponse.alloc()); try { ReactorServerHttpRequest request = new ReactorServerHttpRequest(reactorRequest, bufferFactory); ServerHttpResponse response = new ReactorServerHttpResponse(reactorResponse, bufferFactory); if (request.getMethod() == HttpMethod.HEAD) { response = new HttpHeadResponseDecorator(response); } return this.httpHandler.handle(request, response) .doOnError(ex -> logger.trace(request.getLogPrefix() + "Failed to complete: " + ex.getMessage())) .doOnSuccess(aVoid -> logger.trace(request.getLogPrefix() + "Handling completed")); } catch (URISyntaxException ex) { if (logger.isDebugEnabled()) { logger.debug("Failed to get request URI: " + ex.getMessage()); } reactorResponse.status(HttpResponseStatus.BAD_REQUEST); return Mono.empty(); } } }