org.springframework.http.client.SimpleStreamingClientHttpRequest Maven / Gradle / Ivy
/*
* Copyright 2002-2016 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;
import java.io.IOException;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URI;
import java.net.URISyntaxException;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.util.StreamUtils;
/**
* {@link ClientHttpRequest} implementation that uses standard JDK facilities to
* execute streaming requests. Created via the {@link SimpleClientHttpRequestFactory}.
*
* @author Arjen Poutsma
* @since 3.0
* @see SimpleClientHttpRequestFactory#createRequest(java.net.URI, HttpMethod)
*/
final class SimpleStreamingClientHttpRequest extends AbstractClientHttpRequest {
private final HttpURLConnection connection;
private final int chunkSize;
private OutputStream body;
private final boolean outputStreaming;
SimpleStreamingClientHttpRequest(HttpURLConnection connection, int chunkSize, boolean outputStreaming) {
this.connection = connection;
this.chunkSize = chunkSize;
this.outputStreaming = outputStreaming;
}
public HttpMethod getMethod() {
return HttpMethod.resolve(this.connection.getRequestMethod());
}
@Override
public URI getURI() {
try {
return this.connection.getURL().toURI();
}
catch (URISyntaxException ex) {
throw new IllegalStateException("Could not get HttpURLConnection URI: " + ex.getMessage(), ex);
}
}
@Override
protected OutputStream getBodyInternal(HttpHeaders headers) throws IOException {
if (this.body == null) {
if (this.outputStreaming) {
int contentLength = (int) headers.getContentLength();
if (contentLength >= 0) {
this.connection.setFixedLengthStreamingMode(contentLength);
}
else {
this.connection.setChunkedStreamingMode(this.chunkSize);
}
}
SimpleBufferingClientHttpRequest.addHeaders(this.connection, headers);
this.connection.connect();
this.body = this.connection.getOutputStream();
}
return StreamUtils.nonClosing(this.body);
}
@Override
protected ClientHttpResponse executeInternal(HttpHeaders headers) throws IOException {
try {
if (this.body != null) {
this.body.close();
}
else {
SimpleBufferingClientHttpRequest.addHeaders(this.connection, headers);
this.connection.connect();
// Immediately trigger the request in a no-output scenario as well
this.connection.getResponseCode();
}
}
catch (IOException ex) {
// ignore
}
return new SimpleClientHttpResponse(this.connection);
}
}