001/* 002 * (C) Copyright 2006-2009 Nuxeo SAS (http://nuxeo.com/) and contributors. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the GNU Lesser General Public License 006 * (LGPL) version 2.1 which accompanies this distribution, and is available at 007 * http://www.gnu.org/licenses/lgpl.html 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * Contributors: 015 * Nuxeo - initial API and implementation 016 * 017 * $Id$ 018 */ 019 020package org.nuxeo.ecm.platform.web.common.ajax.service; 021 022import java.util.HashMap; 023import java.util.Map; 024import java.util.concurrent.locks.ReentrantReadWriteLock; 025import java.util.regex.Matcher; 026import java.util.regex.Pattern; 027 028import org.apache.commons.logging.Log; 029import org.apache.commons.logging.LogFactory; 030import org.nuxeo.ecm.platform.web.common.requestcontroller.service.LRUCachingMap; 031import org.nuxeo.runtime.model.ComponentInstance; 032import org.nuxeo.runtime.model.DefaultComponent; 033 034/** 035 * Simple Runtime component to manage proxyable url configuration via Extension Points 036 * 037 * @author tiry 038 */ 039public class AjaxProxyComponent extends DefaultComponent implements AjaxProxyService { 040 041 public static final String PROXY_URL_EP = "proxyableURL"; 042 043 protected static final Map<String, ProxyableURLDescriptor> urlDescriptors = new HashMap<String, ProxyableURLDescriptor>(); 044 045 protected static final Map<String, ProxyURLConfigEntry> urlCache = new LRUCachingMap<String, ProxyURLConfigEntry>( 046 250); 047 048 protected static final ReentrantReadWriteLock cacheLock = new ReentrantReadWriteLock(); 049 050 private static final Log log = LogFactory.getLog(AjaxProxyComponent.class); 051 052 @Override 053 public void registerContribution(Object contribution, String extensionPoint, ComponentInstance contributor) { 054 if (PROXY_URL_EP.equals(extensionPoint)) { 055 ProxyableURLDescriptor desc = (ProxyableURLDescriptor) contribution; 056 registerProxyURL(desc); 057 } else { 058 log.error("Unknown ExtensionPoint " + extensionPoint); 059 } 060 } 061 062 protected void registerProxyURL(ProxyableURLDescriptor desc) { 063 if (urlDescriptors.containsKey(desc.getName())) { 064 urlDescriptors.get(desc.getName()).merge(desc); 065 } else { 066 urlDescriptors.put(desc.getName(), desc); 067 } 068 } 069 070 public ProxyURLConfigEntry getConfigForURL(String targetUrl) { 071 ProxyURLConfigEntry entry = null; 072 073 try { 074 cacheLock.readLock().lock(); 075 entry = urlCache.get(targetUrl); 076 } finally { 077 cacheLock.readLock().unlock(); 078 } 079 if (entry == null) { 080 entry = computeConfigForURL(targetUrl); 081 try { 082 cacheLock.writeLock().lock(); 083 urlCache.put(targetUrl, entry); 084 } finally { 085 cacheLock.writeLock().unlock(); 086 } 087 } 088 return entry; 089 } 090 091 public ProxyURLConfigEntry computeConfigForURL(String targetUrl) { 092 for (ProxyableURLDescriptor desc : urlDescriptors.values()) { 093 if (desc.isEnabled()) { 094 Pattern pat = desc.getCompiledPattern(); 095 Matcher m = pat.matcher(targetUrl); 096 if (m.matches()) { 097 return new ProxyURLConfigEntry(true, desc); 098 } 099 } 100 } 101 // return deny by default 102 return new ProxyURLConfigEntry(); 103 } 104 105}