| /******************************************************************************* |
| * Copyright (c) 2000, 2011 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.help.internal.webapp.servlet; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| import java.util.WeakHashMap; |
| |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServlet; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import javax.xml.transform.TransformerException; |
| |
| import org.eclipse.help.internal.HelpPlugin; |
| import org.eclipse.help.internal.base.BaseHelpSystem; |
| import org.eclipse.help.internal.dynamic.DocumentWriter; |
| import org.eclipse.help.internal.toc.Toc; |
| import org.eclipse.help.internal.toc.TocContribution; |
| import org.eclipse.help.internal.webapp.data.UrlUtil; |
| |
| /* |
| * Sends all toc contributions available on this host in XML form. The toc |
| * is not send in assembled form, but instead fragments, because complete books |
| * may be distributed between remote and local. |
| * |
| * This is called on infocenters by client workbenches configured for remote |
| * help in order to gather all the toc fragments and assemble them into a |
| * complete toc. |
| */ |
| public class TocServlet extends HttpServlet { |
| |
| private static final long serialVersionUID = 1L; |
| private Map<String, String> responseByLocale; |
| private DocumentWriter writer; |
| private static boolean clearCache; |
| |
| @Override |
| protected void doGet(HttpServletRequest req, HttpServletResponse resp) |
| throws ServletException, IOException { |
| // set the character-set to UTF-8 before calling resp.getWriter() |
| resp.setContentType("application/xml; charset=UTF-8"); //$NON-NLS-1$ |
| resp.getWriter().write(processRequest(req, resp)); |
| } |
| |
| protected String processRequest(HttpServletRequest req, HttpServletResponse resp) |
| throws ServletException, IOException { |
| BaseHelpSystem.checkMode(); |
| String locale = UrlUtil.getLocale(req, resp); |
| req.setCharacterEncoding("UTF-8"); //$NON-NLS-1$ |
| |
| if (clearCache){ |
| responseByLocale = new WeakHashMap<String, String>(); |
| clearCache = false; |
| } |
| |
| if (responseByLocale == null) { |
| responseByLocale = new WeakHashMap<String, String>(); |
| } |
| String response = responseByLocale.get(locale); |
| if (response == null) { |
| TocContribution[] contributions = HelpPlugin.getTocManager().getTocContributions(locale); |
| try { |
| response = serialize(contributions, locale); |
| } |
| catch (TransformerException e) { |
| throw new ServletException(e); |
| } |
| responseByLocale.put(locale, response); |
| } |
| |
| return (response != null) ? response : ""; //$NON-NLS-1$ |
| } |
| |
| protected String serialize(TocContribution[] contributions, String locale) throws TransformerException { |
| StringBuffer buf = new StringBuffer(); |
| buf.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"); //$NON-NLS-1$ |
| buf.append("<tocContributions>\n"); //$NON-NLS-1$ |
| if (writer == null) { |
| writer = new DocumentWriter(); |
| } |
| for (TocContribution contribution : contributions) { |
| TocContribution contrib = contribution; |
| if (!contrib.isSubToc()) { |
| buf.append("<tocContribution"); //$NON-NLS-1$ |
| if (contrib.getCategoryId() != null) { |
| buf.append("\n categoryId=\"" + contrib.getCategoryId() + '"'); //$NON-NLS-1$ |
| } |
| if (contrib.getContributorId() != null) { |
| buf.append("\n contributorId=\"" + contrib.getContributorId() + '"'); //$NON-NLS-1$ |
| } |
| buf.append("\n id=\"" + contrib.getId() + '"'); //$NON-NLS-1$ |
| buf.append("\n locale=\"" + contrib.getLocale() + '"'); //$NON-NLS-1$ |
| buf.append("\n isPrimary=\"" + contrib.isPrimary() + "\">\n"); //$NON-NLS-1$ //$NON-NLS-2$ |
| buf.append(writer.writeString((Toc)contrib.getToc(), false)); |
| String[] hrefs = contrib.getExtraDocuments(); |
| for (String href : hrefs) { |
| buf.append(" <extraDocument href=\"" + href + "\"/>\n"); //$NON-NLS-1$//$NON-NLS-2$ |
| } |
| buf.append("</tocContribution>\n"); //$NON-NLS-1$ |
| } |
| } |
| buf.append("</tocContributions>\n"); //$NON-NLS-1$ |
| return buf.toString(); |
| } |
| |
| public static void clearCache() |
| { |
| clearCache = true; |
| } |
| } |