/**********************************************************************************
* $URL: https://source.sakaiproject.org/svn/search/trunk/search-tool/tool/src/java/org/sakaiproject/search/tool/ControllerServlet2.java $
* $Id: ControllerServlet2.java 118402 2013-01-16 21:32:11Z jbush@rsmart.com $
***********************************************************************************
*
* Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008 The Sakai Foundation
*
* Licensed under the Educational Community License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.opensource.org/licenses/ECL-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
**********************************************************************************/
package org.sakaiproject.search.tool;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import javax.servlet.ServletConfig;
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.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.VelocityEngine;
import org.sakaiproject.component.api.ServerConfigurationService;
import org.sakaiproject.exception.PermissionException;
import org.sakaiproject.search.tool.api.SearchAdminBean;
import org.sakaiproject.search.tool.api.SearchBeanFactory;
import org.sakaiproject.tool.api.SessionManager;
import org.sakaiproject.tool.api.Tool;
import org.sakaiproject.tool.api.ToolSession;
import org.sakaiproject.tool.cover.ToolManager;
import org.sakaiproject.util.ResourceLoader;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
/**
* @author ieb
*/
public class ControllerServlet2 extends HttpServlet
{
private static final Log log = LogFactory.getLog(ControllerServlet2.class);
private static final String MACROS = "/WEB-INF/vm/macros.vm";
private static final String BUNDLE_NAME = "org.sakaiproject.search.tool.bundle.Messages"; //$NON-NLS-1$
private static final ResourceLoader rlb = new ResourceLoader(BUNDLE_NAME);
/**
* Required for serialization... also to stop eclipse from giving me a
* warning!
*/
private static final long serialVersionUID = 676743152200357708L;
public static final String SAVED_REQUEST_URL = "org.sakaiproject.search.api.last-request-url";
private static final String PANEL = "panel";
private static final Object TITLE_PANEL = "Title";
private WebApplicationContext wac;
private SearchBeanFactory searchBeanFactory = null;
private SessionManager sessionManager;
private Map<String, String> contentTypes = new HashMap<String, String>();
private Map<String, String> characterEncodings = new HashMap<String, String>();
private VelocityEngine vengine;
private String inlineMacros;
private String basePath;
private String serverUrl;
@Override
public void init(ServletConfig servletConfig) throws ServletException
{
super.init(servletConfig);
ServletContext sc = servletConfig.getServletContext();
wac = WebApplicationContextUtils.getWebApplicationContext(sc);
if (wac == null)
{
throw new ServletException("Unable to get WebApplicationContext ");
}
searchBeanFactory = (SearchBeanFactory) wac.getBean("search-searchBeanFactory");
if (searchBeanFactory == null)
{
throw new ServletException("Unable to get search-searchBeanFactory ");
}
sessionManager = (SessionManager) wac.getBean(SessionManager.class.getName());
if (sessionManager == null)
{
throw new ServletException("Unable to get " + SessionManager.class.getName());
}
ServerConfigurationService serverConfigurationService = (ServerConfigurationService) wac.getBean(ServerConfigurationService.class.getName());
if (serverConfigurationService == null)
{
throw new ServletException("Unable to get " + ServerConfigurationService.class.getName());
}
serverUrl = serverConfigurationService.getServerUrl();
searchBeanFactory.setContext(sc);
inlineMacros = MACROS;
InputStream is = null;
try
{
vengine = new VelocityEngine();
vengine.setApplicationAttribute(ServletContext.class.getName(), sc);
Properties p = new Properties();
is = this.getClass().getResourceAsStream("searchvelocity.config");
p.load(is);
vengine.init(p);
vengine.getTemplate(inlineMacros);
}
catch (Exception ex)
{
throw new ServletException(ex);
}
finally
{
if (is !=null)
{
try {
is.close();
} catch (IOException e) {
log.debug("exception thrown in Finally block");
}
}
}
contentTypes.put("opensearch", "application/opensearchdescription+xml");
contentTypes.put("sakai.src", "application/opensearchdescription+xml" );
contentTypes.put("rss20", "text/xml" );
}
protected void doGet(final HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
execute(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
execute(request, response);
}
public void execute(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
request.setAttribute(Tool.NATIVE_URL, Tool.NATIVE_URL);
VelocityContext vc = new VelocityContext();
String sakaiHeader = (String) request.getAttribute("sakai.html.head");
String toolPlacement = (String) request.getAttribute("sakai.tool.placement.id");
String toolPlacementJs = toolPlacement.toString().replace('-','x');
String skin = "default/"; // this could be changed in the future to
// make search skin awaire
vc.put("skin", skin);
vc.put("sakaiheader", sakaiHeader);
vc.put("rlb",rlb);
vc.put("currentSiteId",ToolManager.getCurrentPlacement().getContext());
vc.put("sakai_tool_placement_id", toolPlacement);
vc.put("sakai_tool_placement_id_js", toolPlacementJs);
vc.put("serverurl", serverUrl);
String targetURL = persistState(request);
if (targetURL != null && targetURL.trim().length() > 0)
{
response.sendRedirect(targetURL);
return;
}
String template = null;
if (TITLE_PANEL.equals(request.getParameter(PANEL)))
{
template = "title";
}
else
{
String path = request.getPathInfo();
if (path == null || path.length() == 0)
{
path = "index";
}
if (path.startsWith("/"))
{
path = path.substring(1);
// SAK-13408, SAK-16278 - Websphere must be told to look in a different directory for .vm files.
// This fix forces the class to use the default directory and file when using WebSphere.
ServerConfigurationService serverConfigurationService
= (ServerConfigurationService) wac.getBean(ServerConfigurationService.class.getName());
if (serverConfigurationService == null)
{
throw new ServletException("Unable to get " + ServerConfigurationService.class.getName());
}
if ("websphere".equals(serverConfigurationService.getString("servlet.container")))
{
// expecting path like: "tool/fe2bb974-dbd4-4a08-b75b-d69f3cdcacea" or
// "tool/fe2bb974-dbd4-4a08-b75b-d69f3cdcacea/admin/index"
if (path.indexOf("/") >= 0) {
path = path.substring(path.indexOf("/"));
}
if (path.startsWith("/")) {
path = path.substring(1);
}
if (path.indexOf("/") >= 0) {
path = path.substring(path.indexOf("/"));
if (path.startsWith("/")) {
path = path.substring(1);
}
} else
{
path = "index";
}
}
}
template = path;
}
log.debug("Path is "+template+" for "+request.getPathInfo());
if ( "sakai.gif".equals(template) ) {
try
{
searchBeanFactory.newSherlockSearchBean(request).sendIcon(response);
}
catch (PermissionException e)
{
log.warn("Failed to send gif ",e);
}
return;
}
try
{
vc.put("searchModel", searchBeanFactory.newSearchBean(request));
}
catch (PermissionException e1)
{
log.debug(e1);
}
try
{ SearchAdminBean searchAdminBean = searchBeanFactory.newSearchAdminBean(request);
if ( searchAdminBean.isRedirectRequired() ) {
response.sendRedirect(request.getRequestURL().toString());
return;
}
vc.put("adminModel", searchBeanFactory.newSearchAdminBean(request));
}
catch (PermissionException e1)
{
log.debug(e1);
}
try
{
vc.put("sherlockModel", searchBeanFactory.newSherlockSearchBean(request));
}
catch (PermissionException e1)
{
log.debug(e1);
}
try
{
vc.put("openSearchModel", searchBeanFactory.newOpenSearchBean(request));
}
catch (PermissionException e1)
{
log.debug(e1);
}
try
{
String filePath = "/WEB-INF/vm/" + template + ".vm";
String contentType = contentTypes.get(template);
if (contentType == null)
{
contentType = "text/html";
}
String characterEncoding = characterEncodings.get(template);
if (characterEncoding == null)
{
characterEncoding = "UTF-8";
}
response.setContentType(contentType);
response.setCharacterEncoding(characterEncoding);
vengine.mergeTemplate(filePath, vc, response.getWriter());
request.removeAttribute(Tool.NATIVE_URL);
}
catch (Exception e)
{
throw new ServletException("Search Failed ", e);
}
}
public void addLocalHeaders(HttpServletRequest request)
{
}
/**
* returns the request state for the tool. If the state is restored, we set
* the request attribute RWikiServlet.REQUEST_STATE_RESTORED to Boolean.TRUE
* and a Thread local named RWikiServlet.REQUEST_STATE_RESTORED to
* Boolean.TRUE. These MUST be checked by anything that modifies state, to
* ensure that a reinitialisation of Tool state does not result in a repost
* of data.
*
* @param request
* @return
*/
private String persistState(HttpServletRequest request)
{
ToolSession ts = sessionManager.getCurrentToolSession();
if (isPageToolDefault(request))
{
log.debug("Incomming URL is " + request.getRequestURL().toString() + "?"
+ request.getQueryString());
log.debug("Restore " + ts.getAttribute(SAVED_REQUEST_URL));
return (String) ts.getAttribute(SAVED_REQUEST_URL);
}
if (isPageRestorable(request))
{
ts.setAttribute(SAVED_REQUEST_URL, request.getRequestURL().toString() + "?"
+ request.getQueryString());
log.debug("Saved " + ts.getAttribute(SAVED_REQUEST_URL));
}
return null;
}
/**
* Check to see if the reques represents the Tool default page. This is not
* the same as the view Home. It is the same as first entry into a Tool or
* when the page is refreshed
*
* @param request
* @return true if the page is the Tool default page
*/
private boolean isPageToolDefault(HttpServletRequest request)
{
if (TITLE_PANEL.equals(request.getParameter(PANEL))) return false;
String pathInfo = request.getPathInfo();
String queryString = request.getQueryString();
String method = request.getMethod();
return ("GET".equalsIgnoreCase(method)
&& (pathInfo == null || request.getPathInfo().length() == 0) && (queryString == null || queryString
.length() == 0));
}
/**
* Check to see if the request represents a page that can act as a restor
* point.
*
* @param request
* @return true if it is possible to restore to this point.
*/
private boolean isPageRestorable(HttpServletRequest request)
{
if (TITLE_PANEL.equals(request.getParameter(PANEL))) return false;
String pathInfo = request.getPathInfo();
if (pathInfo != null)
{
if (request.getPathInfo().endsWith(".gif"))
{
return false;
}
if (request.getPathInfo().endsWith(".src"))
{
return false;
}
}
if ("GET".equalsIgnoreCase(request.getMethod())) return true;
return false;
}
}