/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache 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.apache.org/licenses/LICENSE-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.apache.sling.servlets.get.impl.helpers;
import java.io.IOException;
import javax.jcr.Node;
import javax.jcr.RepositoryException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletResponse;
import org.apache.sling.api.SlingConstants;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.api.resource.ResourceNotFoundException;
import org.apache.sling.api.resource.ResourceUtil;
import org.apache.sling.api.servlets.SlingSafeMethodsServlet;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
/**
* The <code>XMLRendererServlet</code> renders the current resource in XML
* on behalf of the {@link org.apache.sling.servlets.get.impl.DefaultGetServlet}.
*
* At the moment only JCR nodes can be rendered as XML.
*/
public class XMLRendererServlet extends SlingSafeMethodsServlet {
public static final String EXT_XML = "xml";
private static final String SYSVIEW = "sysview";
private static final String DOCVIEW = "docview";
@Override
protected void doGet(SlingHttpServletRequest req,
SlingHttpServletResponse resp)
throws ServletException, IOException {
final Resource r = req.getResource();
if (ResourceUtil.isNonExistingResource(r)) {
throw new ResourceNotFoundException("No data to render.");
}
resp.setContentType(req.getResponseContentType());
resp.setCharacterEncoding("UTF-8");
// are we included?
final boolean isIncluded = req.getAttribute(SlingConstants.ATTR_REQUEST_SERVLET) != null;
final Node node = r.adaptTo(Node.class);
if ( node != null ) {
try {
if ( req.getRequestPathInfo().getSelectorString() == null
|| req.getRequestPathInfo().getSelectorString().equals(DOCVIEW) ) {
// check if response is adaptable to a content handler
final ContentHandler ch = resp.adaptTo(ContentHandler.class);
if ( ch == null ) {
node.getSession().exportDocumentView(node.getPath(), resp.getOutputStream(), false, false);
} else {
node.getSession().exportDocumentView(node.getPath(), ch, false, false);
}
} else if ( req.getRequestPathInfo().getSelectorString().equals(SYSVIEW) ) {
// check if response is adaptable to a content handler
final ContentHandler ch = resp.adaptTo(ContentHandler.class);
if ( ch == null ) {
node.getSession().exportSystemView(node.getPath(), resp.getOutputStream(), false, false);
} else {
node.getSession().exportSystemView(node.getPath(), ch, false, false);
}
} else {
resp.sendError(HttpServletResponse.SC_NO_CONTENT); // NO Content
}
} catch (RepositoryException e) {
throw new ServletException("Unable to export resource as xml: " + r, e);
} catch (SAXException e) {
throw new ServletException("Unable to export resource as xml: " + r, e);
}
} else {
if ( !isIncluded ) {
resp.sendError(HttpServletResponse.SC_NO_CONTENT); // NO Content
}
}
}
}