001 /*
002 * Sonar, open source software quality management tool.
003 * Copyright (C) 2008-2012 SonarSource
004 * mailto:contact AT sonarsource DOT com
005 *
006 * Sonar is free software; you can redistribute it and/or
007 * modify it under the terms of the GNU Lesser General Public
008 * License as published by the Free Software Foundation; either
009 * version 3 of the License, or (at your option) any later version.
010 *
011 * Sonar is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 * Lesser General Public License for more details.
015 *
016 * You should have received a copy of the GNU Lesser General Public
017 * License along with Sonar; if not, write to the Free Software
018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02
019 */
020 package org.sonar.server.plugins;
021
022 import com.google.common.collect.Lists;
023 import org.apache.commons.io.IOUtils;
024 import org.apache.commons.lang.StringUtils;
025 import org.slf4j.Logger;
026 import org.slf4j.LoggerFactory;
027
028 import java.io.IOException;
029 import java.io.InputStream;
030 import java.io.OutputStream;
031 import java.io.PrintWriter;
032 import java.util.List;
033 import java.util.Set;
034
035 import javax.servlet.ServletException;
036 import javax.servlet.http.HttpServlet;
037 import javax.servlet.http.HttpServletRequest;
038 import javax.servlet.http.HttpServletResponse;
039
040 /**
041 * This servlet allows to load libraries from directory "WEB-INF/lib" in order to provide them for batch-bootstrapper.
042 * Most probably this is not a best solution.
043 */
044 public class BatchResourcesServlet extends HttpServlet {
045
046 private static final Logger LOG = LoggerFactory.getLogger(BatchResourcesServlet.class);
047 private static final long serialVersionUID = -2100128371794649028L;
048
049 @Override
050 public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
051 String resource = getResource(request);
052 if (StringUtils.isEmpty(resource)) {
053 PrintWriter writer = null;
054 try {
055 response.setContentType("text/html");
056 writer = response.getWriter();
057 writer.print(StringUtils.join(getLibs(), ','));
058 } catch (IOException e) {
059 LOG.error("Unable to provide list of batch resources", e);
060 response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
061 } finally {
062 IOUtils.closeQuietly(writer);
063 }
064 } else {
065 InputStream in = null;
066 OutputStream out = null;
067 try {
068 in = getServletContext().getResourceAsStream("/WEB-INF/lib/" + resource);
069 if (in == null) {
070 // TODO
071 } else {
072 out = response.getOutputStream();
073 IOUtils.copy(in, out);
074 }
075 } catch (Exception e) {
076 LOG.error("Unable to load batch resource '" + resource + "'", e);
077 response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
078 } finally {
079 IOUtils.closeQuietly(in);
080 IOUtils.closeQuietly(out);
081 }
082 }
083 }
084
085 List<String> getLibs() {
086 List<String> libs = Lists.newArrayList();
087 Set paths = getServletContext().getResourcePaths("/WEB-INF/lib");
088 for (Object obj : paths) {
089 String path = (String) obj;
090 if (StringUtils.endsWith(path, ".jar")) {
091 String filename = StringUtils.removeStart(path, "/WEB-INF/lib/");
092 if (!isIgnored(filename)) {
093 libs.add(filename);
094 }
095 }
096 }
097 return libs;
098 }
099
100 private static final String[] IGNORE = { "derby", "jtds", "mysql", "postgresql", "jruby", "jfreechart", "eastwood", "jetty" };
101
102 /**
103 * Dirty hack to disable downloading for certain files.
104 */
105 static boolean isIgnored(String filename) {
106 for (String prefix : IGNORE) {
107 if (StringUtils.startsWith(filename, prefix)) {
108 return true;
109 }
110 }
111 return false;
112 }
113
114 /**
115 * @return part of request URL after servlet path
116 */
117 String getResource(HttpServletRequest request) {
118 return StringUtils.substringAfter(request.getRequestURI(), request.getContextPath() + request.getServletPath() + "/");
119 }
120
121 }