| /******************************************************************************* |
| * Copyright (c) 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.service; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import javax.servlet.ServletContext; |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServlet; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.eclipse.help.internal.search.SearchHit; |
| import org.eclipse.help.internal.search.SearchProgressMonitor; |
| import org.eclipse.help.internal.webapp.data.SearchData; |
| import org.eclipse.help.internal.webapp.data.UrlUtil; |
| import org.eclipse.help.internal.webapp.parser.SearchParser; |
| import org.eclipse.help.internal.webapp.utils.Utils; |
| import org.eclipse.help.internal.webapp.utils.SearchXMLGenerator; |
| |
| /** |
| * Returns the search hits in <code>xml</code> or <code>json</code> |
| * form for the query provided in the <code>searchWord</code> parameter. |
| * |
| * <p>This servlet is called on infocenters by client workbenches |
| * configured for remote help in order to retrieve search hits |
| * from the remote help server. |
| * |
| * <p>Internally reads {@link org.eclipse.help.internal.webapp.data.SearchData}. |
| * |
| * @param searchWord - specifies the search keyword |
| * @param quickSearch - (optional) specifies if it is a quick search. Scopes |
| * is just the selected toc or topic |
| * @param quickSearchType - (optional) specifies <code>QuickSearchTopic</code> for topic |
| * quick search |
| * @param scope - (optional) specifies search scope values |
| * @param workingSet - (optional) specifies the working set for scoped search |
| * @param maxHits - (optional) specifies the number of hits to return, default value is 500 |
| * @param fieldSearch - (optional) specifies if field only search should be performed; |
| * if set to false, default field "contents" and all other fields will be searched |
| * @param lang - (optional) specifies the locale |
| * @param returnType - (Optional) specifies the return type of the servlet. |
| * Accepts either <code>xml</code> (default) or |
| * <code>json</code> |
| * |
| * @return The search hits, either as <code>xml</code> (default) or |
| * <code>json</code> |
| * |
| * @version $Version$ |
| * |
| **/ |
| public class AdvancedSearchService extends HttpServlet { |
| |
| private static final long serialVersionUID = 1L; |
| public static final String XID = "xid"; //$NON-NLS-1$ |
| |
| @Override |
| protected void doGet(HttpServletRequest req, HttpServletResponse resp) |
| throws ServletException, IOException { |
| |
| req.setCharacterEncoding("UTF-8"); //$NON-NLS-1$ |
| // Set standard HTTP/1.1 no-cache headers. |
| resp.setHeader("Cache-Control", //$NON-NLS-1$ |
| "no-store, no-cache, must-revalidate"); //$NON-NLS-1$ |
| |
| resp.setContentType("application/xml; charset=UTF-8"); //$NON-NLS-1$ |
| |
| ServletContext context = req.getSession().getServletContext(); |
| SearchData searchData = new SearchData(context, req, resp); |
| |
| String noCat = req.getParameter(Utils.NO_CATEGORY); |
| boolean boolIsCategory = (noCat == null |
| || !noCat.equalsIgnoreCase("true")); //$NON-NLS-1$ |
| |
| String locale = UrlUtil.getLocale(req, resp); |
| SearchProgressMonitor pm = SearchProgressMonitor |
| .getProgressMonitor(locale); |
| while (!pm.isDone()) { |
| try { |
| Thread.sleep(500); // Sleep for 0.5 sec |
| } catch(InterruptedException ex) {} |
| } |
| |
| // Load search results |
| searchData.readSearchResults(); |
| SearchHit[] hits = searchData.getResults(); |
| |
| String response = SearchXMLGenerator.serialize(hits, boolIsCategory); |
| |
| String returnType = req.getParameter(Utils.RETURN_TYPE); |
| boolean boolIsJSON = (returnType != null |
| && returnType.equalsIgnoreCase(Utils.JSON)); |
| |
| // If JSON output is required |
| if (boolIsJSON) { |
| resp.setContentType("text/plain"); //$NON-NLS-1$ |
| response = getJSONResponse(response); |
| } |
| |
| resp.getWriter().write(response); |
| } |
| |
| protected String getJSONResponse(String response) |
| throws IOException { |
| SearchParser searchParser = new SearchParser(); |
| |
| InputStream is = null; |
| try { |
| if (response != null) { |
| is = new ByteArrayInputStream(response.getBytes("UTF-8")); //$NON-NLS-1$ |
| searchParser.parse(is); |
| } |
| |
| } catch (Exception e) { |
| e.printStackTrace(); |
| } |
| |
| if (is != null) |
| is.close(); |
| |
| // Call after the catch. |
| // An empty JSON is created if any Exception is thrown |
| // Else returns the complete JSON |
| return searchParser.toJSON(); |
| } |
| } |