/*
* $HeadURL: http://svn.apache.org/repos/asf/jakarta/httpcomponents/httpclient/tags/4.0-alpha1/module-client/src/examples/org/apache/http/examples/client/ClientExecuteDirect.java $
* $Revision: 552268 $
* $Date: 2007-07-01 12:11:34 +0200 (Sun, 01 Jul 2007) $
*
* ====================================================================
* 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.client;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.HttpVersion;
import org.apache.http.client.HttpClient;
import org.apache.http.client.RoutedRequest;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.HttpRoute;
import org.apache.http.conn.PlainSocketFactory;
import org.apache.http.conn.Scheme;
import org.apache.http.conn.SchemeRegistry;
import org.apache.http.conn.SocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.ThreadSafeClientConnManager;
import org.apache.http.message.BasicHttpRequest;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;
import org.apache.http.util.EntityUtils;
/**
* How to send a request directly using {@link HttpClient HttpClient}.
*
* @author <a href="mailto:rolandw at apache.org">Roland Weber</a>
*
*
* <!-- empty lines above to avoid 'svn diff' context problems -->
* @version $Revision: 552268 $
*
* @since 4.0
*/
public class ClientExecuteDirect {
/**
* The default parameters.
* Instantiated in {@link #setup setup}.
*/
private static HttpParams defaultParameters = null;
/**
* The scheme registry.
* Instantiated in {@link #setup setup}.
*/
private static SchemeRegistry supportedSchemes;
/**
* Main entry point to this example.
*
* @param args ignored
*/
public final static void main(String[] args)
throws Exception {
final HttpHost target = new HttpHost("issues.apache.org", 80, "http");
setup(); // some general setup
HttpClient client = createHttpClient();
HttpRequest req = createRequest();
final HttpRoute route = new HttpRoute(target, null, false);
final RoutedRequest roureq = new RoutedRequest.Impl(req, route);
System.out.println("executing request to " + target);
HttpEntity entity = null;
try {
HttpResponse rsp = client.execute(roureq, null);
entity = rsp.getEntity();
System.out.println("----------------------------------------");
System.out.println(rsp.getStatusLine());
Header[] headers = rsp.getAllHeaders();
for (int i=0; i<headers.length; i++) {
System.out.println(headers[i]);
}
System.out.println("----------------------------------------");
if (entity != null) {
System.out.println(EntityUtils.toString(rsp.getEntity()));
}
} finally {
// If we could be sure that the stream of the entity has been
// closed, we wouldn't need this code to release the connection.
// However, EntityUtils.toString(...) can throw an exception.
// if there is no entity, the connection is already released
if (entity != null)
entity.consumeContent(); // release connection gracefully
}
} // main
private final static HttpClient createHttpClient() {
ClientConnectionManager ccm =
new ThreadSafeClientConnManager(getParams(), supportedSchemes);
// new SingleClientConnManager(getParams(), supportedSchemes);
DefaultHttpClient dhc =
new DefaultHttpClient(ccm, getParams());
return dhc;
}
/**
* Performs general setup.
* This should be called only once.
*/
private final static void setup() {
supportedSchemes = new SchemeRegistry();
// Register the "http" protocol scheme, it is required
// by the default operator to look up socket factories.
SocketFactory sf = PlainSocketFactory.getSocketFactory();
supportedSchemes.register(new Scheme("http", sf, 80));
// prepare parameters
HttpParams params = new BasicHttpParams();
HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
HttpProtocolParams.setContentCharset(params, "UTF-8");
HttpProtocolParams.setUseExpectContinue(params, true);
defaultParameters = params;
} // setup
private final static HttpParams getParams() {
return defaultParameters;
}
/**
* Creates a request to execute in this example.
*
* @return a request without an entity
*/
private final static HttpRequest createRequest() {
HttpRequest req = new BasicHttpRequest
("GET", "/", HttpVersion.HTTP_1_1);
//("OPTIONS", "*", HttpVersion.HTTP_1_1);
return req;
}
} // class ClientExecuteDirect