/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.http.examples.nio.client;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CoderResult;
import java.util.concurrent.Future;
import org.apache.http.HttpEntity;
import org.apache.http.HttpException;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.impl.nio.client.DefaultHttpAsyncClient;
import org.apache.http.message.BasicHttpRequest;
import org.apache.http.nio.ContentDecoder;
import org.apache.http.nio.ContentEncoder;
import org.apache.http.nio.IOControl;
import org.apache.http.nio.client.HttpAsyncClient;
import org.apache.http.nio.client.HttpAsyncRequestProducer;
import org.apache.http.nio.client.HttpAsyncResponseConsumer;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
public class AsyncClientHttpExchangeStreaming {
public static void main(String[] args) throws Exception {
HttpAsyncClient httpclient = new DefaultHttpAsyncClient();
httpclient.start();
try {
Future<Boolean> future = httpclient.execute(
new MyRequestProducer(), new MyResponseConsumer(), null);
Boolean result = future.get();
if (result != null && result.booleanValue()) {
System.out.println("Request successfully executed");
} else {
System.out.println("Request failed");
}
System.out.println("Shutting down");
} finally {
httpclient.shutdown();
}
System.out.println("Done");
}
static class MyRequestProducer implements HttpAsyncRequestProducer {
public HttpRequest generateRequest() throws IOException, HttpException {
BasicHttpRequest request = new BasicHttpRequest("GET", "/");
return request;
}
public HttpHost getTarget() {
return new HttpHost("www.apache.org");
}
public boolean isRepeatable() {
return true;
}
public void produceContent(
final ContentEncoder encoder, final IOControl ioctrl) throws IOException {
// Should never be called for non entity enclosing requests
}
public void resetRequest() {
}
}
static class MyResponseConsumer implements HttpAsyncResponseConsumer<Boolean> {
private Charset charset;
private CharsetDecoder decoder;
private ByteBuffer bbuf;
private CharBuffer cbuf;
private volatile Boolean result;
public synchronized void responseReceived(
final HttpResponse response) throws IOException, HttpException {
System.out.println("HTTP response: " + response.getStatusLine());
HttpEntity entity = response.getEntity();
if (entity != null) {
String s = EntityUtils.getContentCharSet(entity);
if (s == null) {
s = HTTP.DEFAULT_CONTENT_CHARSET;
}
this.charset = Charset.forName(s);
this.decoder = this.charset.newDecoder();
this.bbuf = ByteBuffer.allocate(1024);
this.cbuf = CharBuffer.allocate(1024);
}
}
public synchronized void consumeContent(
final ContentDecoder decoder, final IOControl ioctrl) throws IOException {
int bytesRead;
do {
bytesRead = decoder.read(this.bbuf);
this.bbuf.flip();
CoderResult result = this.decoder.decode(this.bbuf, this.cbuf, decoder.isCompleted());
if (result.isError()) {
result.throwException();
}
this.bbuf.compact();
this.cbuf.flip();
while (this.cbuf.hasRemaining()) {
System.out.print(this.cbuf.get());
}
this.cbuf.compact();
} while (bytesRead > 0);
}
public void responseCompleted() {
this.result = Boolean.TRUE;
}
public void cancel() {
this.result = Boolean.FALSE;
}
public void failed(final Exception ex) {
this.result = Boolean.FALSE;
ex.printStackTrace();
}
public Boolean getResult() {
return this.result;
}
}
}