/*
* 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.reseditor;
import java.io.IOException;
import java.io.InputStream;
import javax.jcr.Node;
import javax.jcr.PathNotFoundException;
import javax.jcr.PropertyType;
import javax.jcr.RepositoryException;
import javax.jcr.ValueFormatException;
import javax.servlet.Servlet;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Properties;
import org.apache.felix.scr.annotations.Property;
import org.apache.felix.scr.annotations.Service;
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.servlets.SlingSafeMethodsServlet;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Streams the content of the property specified by the request parameter
* 'property' to the response of the request.
*/
@Component
@Service(Servlet.class)
@Properties({
@Property(name = "service.description", value = "Download Servlet for binary properties"),
@Property(name = "service.vendor", value = "The Apache Software Foundation"),
@Property(name = "sling.servlet.selectors", value = "property"),
@Property(name = "sling.servlet.extensions", value = "download"),
@Property(name = "sling.servlet.resourceTypes", value = "sling/servlet/default")
})
public class DownloadBinaryProperty extends SlingSafeMethodsServlet {
private static final long serialVersionUID = -1L;
/** default log */
private final Logger log = LoggerFactory
.getLogger(DownloadBinaryProperty.class);
@Override
protected void doGet(SlingHttpServletRequest request,
SlingHttpServletResponse response) throws ServletException,
IOException {
String propertyName = request.getParameter("property");
if ("".equals(propertyName) || propertyName == null)
throw new ResourceNotFoundException("No property specified.");
ServletOutputStream out = response.getOutputStream();
Resource resource = request.getResource();
Node currentNode = resource.adaptTo(Node.class);
javax.jcr.Property property = null;
try {
property = currentNode.getProperty(propertyName);
} catch (PathNotFoundException e) {
response.sendError(HttpServletResponse.SC_NOT_FOUND, "Not found.");
throw new ResourceNotFoundException("Not found.");
} catch (RepositoryException e) {
response.sendError(HttpServletResponse.SC_NOT_FOUND, "Not found.");
throw new ResourceNotFoundException("Not found.");
}
InputStream stream = null;
try {
if (property == null || property.getType() != PropertyType.BINARY) {
response.sendError(HttpServletResponse.SC_NOT_FOUND, "Not found.");
throw new ResourceNotFoundException("Not found.");
}
long length = property.getLength();
if (length > 0) {
if (length < Integer.MAX_VALUE) {
response.setContentLength((int) length);
} else {
response.setHeader("Content-Length", String.valueOf(length));
}
}
stream = property.getStream();
byte[] buf = new byte[2048];
int rd;
while ((rd = stream.read(buf)) >= 0) {
out.write(buf, 0, rd);
}
} catch (ValueFormatException e) {
response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
"Error downloading the property content.");
log.debug("error reading the property " + property + " of path "
+ resource.getPath(), e);
} catch (RepositoryException e) {
response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
"Error downloading the property content.");
log.debug("error reading the property " + property + " of path "
+ resource.getPath(), e);
} finally {
stream.close();
}
}
}