org.springframework.http.client.SimpleStreamingAsyncClientHttpRequest 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.IOException;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.concurrent.Callable;
import org.springframework.core.task.AsyncListenableTaskExecutor;
import org.springframework.http.HttpHeaders;
import org.springframework.lang.Nullable;
import org.springframework.util.StreamUtils;
import org.springframework.util.concurrent.ListenableFuture;
/**
* {@link org.springframework.http.client.ClientHttpRequest} implementation
* that uses standard Java facilities to execute streaming requests. Created
* via the {@link org.springframework.http.client.SimpleClientHttpRequestFactory}.
*
* @author Arjen Poutsma
* @since 3.0
* @see org.springframework.http.client.SimpleClientHttpRequestFactory#createRequest
* @see org.springframework.http.client.support.AsyncHttpAccessor
* @see org.springframework.web.client.AsyncRestTemplate
* @deprecated as of Spring 5.0, with no direct replacement
*/
@Deprecated
final class SimpleStreamingAsyncClientHttpRequest extends AbstractAsyncClientHttpRequest {
private final HttpURLConnection connection;
private final int chunkSize;
@Nullable
private OutputStream body;
private final boolean outputStreaming;
private final AsyncListenableTaskExecutor taskExecutor;
SimpleStreamingAsyncClientHttpRequest(HttpURLConnection connection, int chunkSize,
boolean outputStreaming, AsyncListenableTaskExecutor taskExecutor) {
this.connection = connection;
this.chunkSize = chunkSize;
this.outputStreaming = outputStreaming;
this.taskExecutor = taskExecutor;
}
@Override
public String getMethodValue() {
return 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) {
long contentLength = 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 ListenableFuture executeInternal(final HttpHeaders headers) throws IOException {
return this.taskExecutor.submitListenable(new Callable() {
@Override
public ClientHttpResponse call() throws Exception {
try {
if (body != null) {
body.close();
}
else {
SimpleBufferingClientHttpRequest.addHeaders(connection, headers);
connection.connect();
// Immediately trigger the request in a no-output scenario as well
connection.getResponseCode();
}
}
catch (IOException ex) {
// ignore
}
return new SimpleClientHttpResponse(connection);
}
});
}
}