Java tutorial
/************************************************************************* * Copyright 2009-2012 Eucalyptus Systems, Inc. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 3 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see http://www.gnu.org/licenses/. * * Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta * CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need * additional information or have any questions. * * This file may incorporate work covered under the following copyright * and permission notice: * * Software License Agreement (BSD License) * * Copyright (c) 2008, Regents of the University of California * All rights reserved. * * Redistribution and use of this software in source and binary forms, * with or without modification, are permitted provided that the * following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer * in the documentation and/or other materials provided with the * distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. USERS OF THIS SOFTWARE ACKNOWLEDGE * THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE LICENSED MATERIAL, * COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS SOFTWARE, * AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING * IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA, * SANTA BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY, * WHICH IN THE REGENTS' DISCRETION MAY INCLUDE, WITHOUT LIMITATION, * REPLACEMENT OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO * IDENTIFIED, OR WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT * NEEDED TO COMPLY WITH ANY SUCH LICENSES OR RIGHTS. ************************************************************************/ package com.eucalyptus.webui.server; import java.io.IOException; import java.io.InputStream; import java.net.MalformedURLException; import java.util.ArrayList; import org.apache.commons.httpclient.HttpClient; import org.apache.commons.httpclient.params.HttpMethodParams; import org.apache.commons.httpclient.params.HttpParams; import org.apache.commons.httpclient.ProxyHost; import org.apache.commons.httpclient.methods.GetMethod; import org.apache.log4j.Logger; import com.eucalyptus.bootstrap.HttpServerBootstrapper; import com.eucalyptus.webui.client.service.DownloadInfo; import com.google.common.collect.Lists; public class DownloadsWebBackend { private static final Logger LOG = Logger.getLogger(DownloadsWebBackend.class); private static final Integer TIMEOUT = 1000 * 10; // 10 seconds private static final int MAX = 50; public static ArrayList<DownloadInfo> getDownloads(String downloadsUrl) { ArrayList<DownloadInfo> downloadsList = Lists.newArrayList(); HttpClient httpClient = new HttpClient(); //set User-Agent String clientVersion = (String) httpClient.getParams().getDefaults() .getParameter(HttpMethodParams.USER_AGENT); String javaVersion = System.getProperty("java.version"); String osName = System.getProperty("os.name"); String osArch = System.getProperty("os.arch"); String eucaVersion = System.getProperty("euca.version"); String extraVersion = System.getProperty("euca.extra_version"); // Jakarta Commons-HttpClient/3.1 (java 1.6.0_24; Linux amd64) Eucalyptus/3.1.0-1.el6 String userAgent = clientVersion + " (java " + javaVersion + "; " + osName + " " + osArch + ") Eucalyptus/" + eucaVersion; if (extraVersion != null) { userAgent = userAgent + "-" + extraVersion; } httpClient.getParams().setParameter(HttpMethodParams.USER_AGENT, userAgent); //support for http proxy if (HttpServerBootstrapper.httpProxyHost != null && (HttpServerBootstrapper.httpProxyHost.length() > 0)) { String proxyHost = HttpServerBootstrapper.httpProxyHost; if (HttpServerBootstrapper.httpProxyPort != null && (HttpServerBootstrapper.httpProxyPort.length() > 0)) { int proxyPort = Integer.parseInt(HttpServerBootstrapper.httpProxyPort); httpClient.getHostConfiguration().setProxy(proxyHost, proxyPort); } else { httpClient.getHostConfiguration().setProxyHost(new ProxyHost(proxyHost)); } } GetMethod method = new GetMethod(downloadsUrl); method.getParams().setSoTimeout(TIMEOUT); try { httpClient.executeMethod(method); String str = ""; InputStream in = method.getResponseBodyAsStream(); byte[] readBytes = new byte[1024]; int bytesRead = -1; while ((bytesRead = in.read(readBytes)) > 0) { str += new String(readBytes, 0, bytesRead); } String entries[] = str.split("[\\r\\n]+"); for (int i = 0; i < entries.length; i++) { String entry[] = entries[i].split("\\t"); if (entry.length == 3) { downloadsList.add(new DownloadInfo(entry[0], entry[1], entry[2])); } } } catch (MalformedURLException e) { LOG.error("Malformed URL exception: " + downloadsUrl, e); LOG.debug(e, e); } catch (IOException e) { LOG.error("I/O exception", e); LOG.debug(e, e); } finally { method.releaseConnection(); } return downloadsList; } }