Java tutorial
/**************************************************************** * Licensed to the AOS Community (AOS) under one or more * * contributor license agreements. See the NOTICE file * * distributed with this work for additional information * * regarding copyright ownership. The AOS 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. * ****************************************************************/ /* * ==================================================================== * 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 io.aos.protocol.http.httpcommon; import java.io.ByteArrayInputStream; import java.net.Socket; import org.apache.http.ConnectionReuseStrategy; import org.apache.http.HttpEntity; import org.apache.http.HttpHost; import org.apache.http.HttpRequestInterceptor; import org.apache.http.HttpResponse; import org.apache.http.HttpVersion; import org.apache.http.entity.ByteArrayEntity; import org.apache.http.entity.InputStreamEntity; import org.apache.http.entity.StringEntity; import org.apache.http.impl.DefaultConnectionReuseStrategy; import org.apache.http.impl.DefaultHttpClientConnection; import org.apache.http.message.BasicHttpEntityEnclosingRequest; import org.apache.http.params.HttpParams; import org.apache.http.params.HttpProtocolParams; import org.apache.http.params.SyncBasicHttpParams; import org.apache.http.protocol.BasicHttpContext; import org.apache.http.protocol.ExecutionContext; import org.apache.http.protocol.HttpContext; import org.apache.http.protocol.HttpProcessor; import org.apache.http.protocol.HttpRequestExecutor; import org.apache.http.protocol.ImmutableHttpProcessor; import org.apache.http.protocol.RequestConnControl; import org.apache.http.protocol.RequestContent; import org.apache.http.protocol.RequestExpectContinue; import org.apache.http.protocol.RequestTargetHost; import org.apache.http.protocol.RequestUserAgent; import org.apache.http.util.EntityUtils; /** * Elemental example for executing multiple POST requests sequentially. * <p> * Please note the purpose of this application is demonstrate the usage of HttpCore APIs. * It is NOT intended to demonstrate the most efficient way of building an HTTP client. */ public class ElementalHttpPost { public static void main(String... args) throws Exception { HttpParams params = new SyncBasicHttpParams(); HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1); HttpProtocolParams.setContentCharset(params, "UTF-8"); HttpProtocolParams.setUserAgent(params, "Test/1.1"); HttpProtocolParams.setUseExpectContinue(params, true); HttpProcessor httpproc = new ImmutableHttpProcessor(new HttpRequestInterceptor[] { // Required protocol interceptors new RequestContent(), new RequestTargetHost(), // Recommended protocol interceptors new RequestConnControl(), new RequestUserAgent(), new RequestExpectContinue() }); HttpRequestExecutor httpexecutor = new HttpRequestExecutor(); HttpContext context = new BasicHttpContext(null); HttpHost host = new HttpHost("localhost", 8080); DefaultHttpClientConnection conn = new DefaultHttpClientConnection(); ConnectionReuseStrategy connStrategy = new DefaultConnectionReuseStrategy(); context.setAttribute(ExecutionContext.HTTP_CONNECTION, conn); context.setAttribute(ExecutionContext.HTTP_TARGET_HOST, host); try { HttpEntity[] requestBodies = { new StringEntity("This is the first test request", "UTF-8"), new ByteArrayEntity("This is the second test request".getBytes("UTF-8")), new InputStreamEntity(new ByteArrayInputStream( "This is the third test request (will be chunked)".getBytes("UTF-8")), -1) }; for (int i = 0; i < requestBodies.length; i++) { if (!conn.isOpen()) { Socket socket = new Socket(host.getHostName(), host.getPort()); conn.bind(socket, params); } BasicHttpEntityEnclosingRequest request = new BasicHttpEntityEnclosingRequest("POST", "/servlets-examples/servlet/RequestInfoExample"); request.setEntity(requestBodies[i]); System.out.println(">> Request URI: " + request.getRequestLine().getUri()); request.setParams(params); httpexecutor.preProcess(request, httpproc, context); HttpResponse response = httpexecutor.execute(request, conn, context); response.setParams(params); httpexecutor.postProcess(response, httpproc, context); System.out.println("<< Response: " + response.getStatusLine()); System.out.println(EntityUtils.toString(response.getEntity())); System.out.println("=============="); if (!connStrategy.keepAlive(response, context)) { conn.close(); } else { System.out.println("Connection kept alive..."); } } } finally { conn.close(); } } }