org.springframework.http.client.reactive.ReactorClientHttpResponse Maven / Gradle / Ivy
/*
* 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.http.client.reactive;
import java.util.Collection;
import java.util.concurrent.atomic.AtomicBoolean;
import io.netty.buffer.ByteBufAllocator;
import reactor.core.publisher.Flux;
import reactor.netty.NettyInbound;
import reactor.netty.http.client.HttpClientResponse;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.core.io.buffer.NettyDataBufferFactory;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseCookie;
import org.springframework.util.CollectionUtils;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
/**
* {@link ClientHttpResponse} implementation for the Reactor-Netty HTTP client.
*
* @author Brian Clozel
* @since 5.0
* @see reactor.netty.http.client.HttpClient
*/
class ReactorClientHttpResponse implements ClientHttpResponse {
private final NettyDataBufferFactory bufferFactory;
private final HttpClientResponse response;
private final NettyInbound inbound;
private final AtomicBoolean rejectSubscribers = new AtomicBoolean();
public ReactorClientHttpResponse(HttpClientResponse response, NettyInbound inbound, ByteBufAllocator alloc) {
this.response = response;
this.inbound = inbound;
this.bufferFactory = new NettyDataBufferFactory(alloc);
}
@Override
public Flux getBody() {
return this.inbound.receive()
.doOnSubscribe(s -> {
if (this.rejectSubscribers.get()) {
throw new IllegalStateException("The client response body can only be consumed once.");
}
})
.doOnCancel(() -> {
// https://github.com/reactor/reactor-netty/issues/503
// FluxReceive rejects multiple subscribers, but not after a cancel().
// Subsequent subscribers after cancel() will not be rejected, but will hang instead.
// So we need to intercept and reject them in that case.
this.rejectSubscribers.set(true);
})
.map(byteBuf -> {
byteBuf.retain();
return this.bufferFactory.wrap(byteBuf);
});
}
@Override
public HttpHeaders getHeaders() {
HttpHeaders headers = new HttpHeaders();
this.response.responseHeaders().entries().forEach(e -> headers.add(e.getKey(), e.getValue()));
return headers;
}
@Override
public HttpStatus getStatusCode() {
return HttpStatus.valueOf(getRawStatusCode());
}
@Override
public int getRawStatusCode() {
return this.response.status().code();
}
@Override
public MultiValueMap getCookies() {
MultiValueMap result = new LinkedMultiValueMap<>();
this.response.cookies().values().stream().flatMap(Collection::stream)
.forEach(cookie ->
result.add(cookie.name(), ResponseCookie.from(cookie.name(), cookie.value())
.domain(cookie.domain())
.path(cookie.path())
.maxAge(cookie.maxAge())
.secure(cookie.isSecure())
.httpOnly(cookie.isHttpOnly())
.build()));
return CollectionUtils.unmodifiableMultiValueMap(result);
}
@Override
public String toString() {
return "ReactorClientHttpResponse{" +
"request=[" + this.response.method().name() + " " + this.response.uri() + "]," +
"status=" + getRawStatusCode() + '}';
}
}