/*
* Copyright 2002-2017 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.web.reactive.function.client;
import java.util.List;
import java.util.Optional;
import java.util.OptionalLong;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseCookie;
import org.springframework.http.client.reactive.ClientHttpResponse;
import org.springframework.util.MultiValueMap;
import org.springframework.web.reactive.function.BodyExtractor;
/**
* Represents an HTTP response, as returned by the {@link ExchangeFunction}.
* Access to headers and body is offered by {@link Headers} and
* {@link #body(BodyExtractor)}, {@link #bodyToMono(Class)}, {@link #bodyToFlux(Class)}
* respectively.
*
* @author Brian Clozel
* @author Arjen Poutsma
* @since 5.0
*/
public interface ClientResponse {
/**
* Return the status code of this response.
*/
HttpStatus statusCode();
/**
* Return the headers of this response.
*/
Headers headers();
/**
* Return cookies of this response.
*/
MultiValueMap<String, ResponseCookie> cookies();
/**
* Extract the body with the given {@code BodyExtractor}.
* @param extractor the {@code BodyExtractor} that reads from the response
* @param <T> the type of the body returned
* @return the extracted body
*/
<T> T body(BodyExtractor<T, ? super ClientHttpResponse> extractor);
/**
* Extract the body to a {@code Mono}.
* @param elementClass the class of element in the {@code Mono}
* @param <T> the element type
* @return a mono containing the body of the given type {@code T}
*/
<T> Mono<T> bodyToMono(Class<? extends T> elementClass);
/**
* Extract the body to a {@code Flux}.
* @param elementClass the class of element in the {@code Flux}
* @param <T> the element type
* @return a flux containing the body of the given type {@code T}
*/
<T> Flux<T> bodyToFlux(Class<? extends T> elementClass);
/**
* Represents the headers of the HTTP response.
* @see ClientResponse#headers()
*/
interface Headers {
/**
* Return the length of the body in bytes, as specified by the
* {@code Content-Length} header.
*/
OptionalLong contentLength();
/**
* Return the {@linkplain MediaType media type} of the body, as specified
* by the {@code Content-Type} header.
*/
Optional<MediaType> contentType();
/**
* Return the header value(s), if any, for the header of the given name.
* <p>Return an empty list if no header values are found.
* @param headerName the header name
*/
List<String> header(String headerName);
/**
* Return the headers as a {@link HttpHeaders} instance.
*/
HttpHeaders asHttpHeaders();
}
}