/* * 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. */ package org.springframework.mock.http.client.reactive.test; import java.net.URI; import java.nio.charset.Charset; import java.nio.charset.StandardCharsets; import java.util.Collection; import java.util.Optional; import java.util.function.Function; import org.reactivestreams.Publisher; import reactor.core.publisher.Flux; import reactor.core.publisher.Mono; import org.springframework.core.io.buffer.DataBuffer; import org.springframework.core.io.buffer.DataBufferFactory; import org.springframework.core.io.buffer.DataBufferUtils; import org.springframework.core.io.buffer.DefaultDataBufferFactory; import org.springframework.http.HttpHeaders; import org.springframework.http.HttpMethod; import org.springframework.http.client.reactive.AbstractClientHttpRequest; import org.springframework.http.client.reactive.ClientHttpRequest; import org.springframework.util.Assert; import org.springframework.util.MimeType; import org.springframework.web.util.UriComponentsBuilder; /** * Mock implementation of {@link ClientHttpRequest}. * * @author Brian Clozel * @author Rossen Stoyanchev * @since 5.0 */ public class MockClientHttpRequest extends AbstractClientHttpRequest { private HttpMethod httpMethod; private URI url; private final DataBufferFactory bufferFactory = new DefaultDataBufferFactory(); private Flux<DataBuffer> body = Flux.error( new IllegalStateException("The body is not set. " + "Did handling complete with success? Is a custom \"writeHandler\" configured?")); private Function<Flux<DataBuffer>, Mono<Void>> writeHandler; public MockClientHttpRequest(HttpMethod httpMethod, String urlTemplate, Object... vars) { this(httpMethod, UriComponentsBuilder.fromUriString(urlTemplate).buildAndExpand(vars).encode().toUri()); } public MockClientHttpRequest(HttpMethod httpMethod, URI url) { this.httpMethod = httpMethod; this.url = url; this.writeHandler = body -> { this.body = body.cache(); return this.body.then(); }; } /** * Configure a custom handler for writing the request body. * * <p>The default write handler consumes and caches the request body so it * may be accessed subsequently, e.g. in test assertions. Use this property * when the request body is an infinite stream. * * @param writeHandler the write handler to use returning {@code Mono<Void>} * when the body has been "written" (i.e. consumed). */ public void setWriteHandler(Function<Flux<DataBuffer>, Mono<Void>> writeHandler) { Assert.notNull(writeHandler, "'writeHandler' is required"); this.writeHandler = writeHandler; } @Override public HttpMethod getMethod() { return this.httpMethod; } @Override public URI getURI() { return this.url; } @Override public DataBufferFactory bufferFactory() { return this.bufferFactory; } @Override protected void applyHeaders() { } @Override protected void applyCookies() { getCookies().values().stream().flatMap(Collection::stream) .forEach(cookie -> getHeaders().add(HttpHeaders.COOKIE, cookie.toString())); } @Override public Mono<Void> writeWith(Publisher<? extends DataBuffer> body) { return doCommit(() -> Mono.defer(() -> this.writeHandler.apply(Flux.from(body)))); } @Override public Mono<Void> writeAndFlushWith(Publisher<? extends Publisher<? extends DataBuffer>> body) { return writeWith(Flux.from(body).flatMap(p -> p)); } @Override public Mono<Void> setComplete() { return writeWith(Flux.empty()); } /** * Return the request body, or an error stream if the body was never set * or when {@link #setWriteHandler} is configured. */ public Flux<DataBuffer> getBody() { return this.body; } /** * Aggregate response data and convert to a String using the "Content-Type" * charset or "UTF-8" by default. */ public Mono<String> getBodyAsString() { Charset charset = Optional.ofNullable(getHeaders().getContentType()).map(MimeType::getCharset) .orElse(StandardCharsets.UTF_8); return getBody() .reduce(bufferFactory().allocateBuffer(), (previous, current) -> { previous.write(current); DataBufferUtils.release(current); return previous; }) .map(buffer -> bufferToString(buffer, charset)); } private static String bufferToString(DataBuffer buffer, Charset charset) { Assert.notNull(charset, "'charset' must not be null"); byte[] bytes = new byte[buffer.readableByteCount()]; buffer.read(bytes); return new String(bytes, charset); } }