org.opencms.main.CmsAliasResourceHandler Maven / Gradle / Ivy
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/*
* This library is part of OpenCms -
* the Open Source Content Management System
*
* Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* For further information about Alkacon Software, please see the
* company website: http://www.alkacon.com
*
* For further information about OpenCms, please see the
* project website: http://www.opencms.org
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.opencms.main;
import org.opencms.ade.detailpage.CmsDetailPageResourceHandler;
import org.opencms.db.CmsAlias;
import org.opencms.db.CmsRewriteAliasMatcher;
import org.opencms.file.CmsObject;
import org.opencms.file.CmsResource;
import org.opencms.gwt.shared.alias.CmsAliasMode;
import org.opencms.i18n.CmsMessageContainer;
import org.opencms.security.CmsPermissionViolationException;
import org.opencms.security.CmsSecurityException;
import org.opencms.util.CmsFileUtil;
import org.opencms.workplace.CmsWorkplace;
import java.io.IOException;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
/**
* Resource init handler for detail-pages.
*
* @since 8.0.0
*/
public class CmsAliasResourceHandler implements I_CmsResourceInit {
/** The attribute containing the detail content resource. */
public static final String ATTR_DETAIL_CONTENT_RESOURCE = "__opencms_detail_content_resource";
/** The log object for this class. */
private static final Log LOG = CmsLog.getLog(CmsDetailPageResourceHandler.class);
/**
* Default constructor.
*/
public CmsAliasResourceHandler() {
// empty
}
/**
* @see org.opencms.main.I_CmsResourceInit#initResource(org.opencms.file.CmsResource, org.opencms.file.CmsObject, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
public CmsResource initResource(
CmsResource resource,
CmsObject cms,
HttpServletRequest req,
HttpServletResponse res) throws CmsResourceInitException, CmsSecurityException {
// check if the resource was already found or the path starts with '/system/'
boolean abort = (resource != null) || cms.getRequestContext().getUri().startsWith(CmsWorkplace.VFS_PATH_SYSTEM);
if (abort) {
// skip in all cases above
return resource;
}
String path = cms.getRequestContext().getUri();
path = CmsFileUtil.removeTrailingSeparator(path);
String siteRoot = cms.getRequestContext().getSiteRoot();
if ("".equals(siteRoot)) {
siteRoot = OpenCms.getSiteManager().getSiteRoot(path);
if (siteRoot == null) {
siteRoot = "";
}
}
try {
String sitePath = path;
String oldSiteRoot = cms.getRequestContext().getSiteRoot();
try {
cms.getRequestContext().setSiteRoot(siteRoot);
sitePath = cms.getRequestContext().removeSiteRoot(path);
} finally {
cms.getRequestContext().setSiteRoot(oldSiteRoot);
}
CmsRewriteAliasMatcher rewriteAliases = OpenCms.getAliasManager().getRewriteAliasMatcher(cms, siteRoot);
CmsRewriteAliasMatcher.RewriteResult rewriteResult = rewriteAliases.match(sitePath);
if ((rewriteResult != null) && (res != null)) {
String link = OpenCms.getLinkManager().substituteLink(cms, rewriteResult.getNewPath());
if (rewriteResult.getAlias().getMode().isRedirect()) {
redirectToTarget(
req,
res,
link,
rewriteResult.getAlias().getMode() == CmsAliasMode.permanentRedirect);
} else {
cms.getRequestContext().setUri(rewriteResult.getNewPath());
}
return null;
}
List aliases = OpenCms.getAliasManager().getAliasesForPath(cms, siteRoot, sitePath);
assert aliases.size() < 2;
if (aliases.size() == 1) {
CmsAlias alias = aliases.get(0);
CmsResource aliasTarget = cms.readResource(alias.getStructureId());
if (alias.isRedirect()) {
String link = OpenCms.getLinkManager().substituteLink(cms, aliasTarget);
boolean isPermanent = alias.isPermanentRedirect();
// response may be null if we're coming from the locale manager
redirectToTarget(req, res, link, isPermanent);
} else {
// not a redirect, just proceed with the aliased resource
cms.getRequestContext().setUri(cms.getSitePath(aliasTarget));
return aliasTarget;
}
}
} catch (CmsPermissionViolationException e) {
// trigger the permission denied handler
throw e;
} catch (CmsResourceInitException e) {
// just rethrow so the catch(Throwable e) code isn't executed
throw e;
} catch (Throwable e) {
String uri = cms.getRequestContext().getUri();
CmsMessageContainer msg = org.opencms.ade.detailpage.Messages.get().container(
org.opencms.ade.detailpage.Messages.ERR_RESCOURCE_NOT_FOUND_1,
uri);
LOG.error(e.getLocalizedMessage(), e);
throw new CmsResourceInitException(msg, e);
}
return null;
}
/**
* Helper method for sending a redirect to a new URI.
*
* @param req the current request
* @param res the current response
* @param link the redirect target
* @param isPermanent if true, sends a 'moved permanently' redirect
*
* @throws IOException
* @throws CmsResourceInitException
*/
private void redirectToTarget(HttpServletRequest req, HttpServletResponse res, String link, boolean isPermanent)
throws IOException, CmsResourceInitException {
CmsResourceInitException resInitException = new CmsResourceInitException(getClass());
if (res != null) {
// preserve request parameters for the redirect
String query = req.getQueryString();
if (query != null) {
link += "?" + query;
}
// disable 404 handler
resInitException.setClearErrors(true);
if (isPermanent) {
res.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);
res.setHeader("Location", link);
} else {
res.sendRedirect(link);
}
}
throw resInitException;
}
}