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. * ****************************************************************/ package io.aos.protocol.http.commons; import java.io.IOException; import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler; import org.apache.commons.httpclient.HttpClient; import org.apache.commons.httpclient.HttpException; import org.apache.commons.httpclient.HttpStatus; import org.apache.commons.httpclient.methods.GetMethod; import org.apache.commons.httpclient.params.HttpMethodParams; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class CommonsHttpClient { private static final Logger LOG = LoggerFactory.getLogger(CommonsHttpClient.class); public static void get(String url) { HttpClient client = new HttpClient(); GetMethod method = new GetMethod(url); method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler(3, false)); try { int statusCode = client.executeMethod(method); if (statusCode != HttpStatus.SC_OK) { LOG.error("Method failed: " + method.getStatusLine()); } byte[] responseBody = method.getResponseBody(); LOG.debug(new String(responseBody, "UTF-8")); } catch (HttpException e) { LOG.error("Fatal protocol violation: " + e.getMessage(), e); } catch (IOException e) { LOG.error("Fatal transport error: " + e.getMessage(), e); } finally { method.releaseConnection(); } } }