org.springframework.http.client.HttpComponentsClientHttpResponse 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
*
* 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 org.springframework.http.client;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.util.EntityUtils;
import org.springframework.http.HttpHeaders;
import org.springframework.lang.Nullable;
import org.springframework.util.StreamUtils;
/**
* {@link ClientHttpResponse} implementation based on
* Apache HttpComponents HttpClient.
*
* Created via the {@link HttpComponentsClientHttpRequest}.
*
* @author Oleg Kalnichevski
* @author Arjen Poutsma
* @since 3.1
* @see HttpComponentsClientHttpRequest#execute()
*/
final class HttpComponentsClientHttpResponse extends AbstractClientHttpResponse {
private final HttpResponse httpResponse;
@Nullable
private HttpHeaders headers;
HttpComponentsClientHttpResponse(HttpResponse httpResponse) {
this.httpResponse = httpResponse;
}
@Override
public int getRawStatusCode() throws IOException {
return this.httpResponse.getStatusLine().getStatusCode();
}
@Override
public String getStatusText() throws IOException {
return this.httpResponse.getStatusLine().getReasonPhrase();
}
@Override
public HttpHeaders getHeaders() {
if (this.headers == null) {
this.headers = new HttpHeaders();
for (Header header : this.httpResponse.getAllHeaders()) {
this.headers.add(header.getName(), header.getValue());
}
}
return this.headers;
}
@Override
public InputStream getBody() throws IOException {
HttpEntity entity = this.httpResponse.getEntity();
return (entity != null ? entity.getContent() : StreamUtils.emptyInput());
}
@Override
public void close() {
// Release underlying connection back to the connection manager
try {
try {
// Attempt to keep connection alive by consuming its remaining content
EntityUtils.consume(this.httpResponse.getEntity());
}
finally {
if (this.httpResponse instanceof Closeable) {
((Closeable) this.httpResponse).close();
}
}
}
catch (IOException ex) {
// Ignore exception on close...
}
}
}