/*
* Copyright (C) 2009 eXo Platform SAS.
*
* This 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 software 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.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.frameworks.jcr.command.web;
import org.apache.commons.chain.Command;
import org.apache.commons.chain.Context;
import org.exoplatform.commons.utils.MimeTypeResolver;
import org.exoplatform.frameworks.jcr.command.DefaultKeys;
import org.exoplatform.frameworks.jcr.command.JCRCommandHelper;
import java.io.InputStream;
import java.io.PrintWriter;
import javax.jcr.ItemNotFoundException;
import javax.jcr.Node;
import javax.jcr.PathNotFoundException;
import javax.jcr.Property;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Created by The eXo Platform SAS .<br/> the command to output nt:resource to Servlet Response gets
* DefaultKeys.PATH attrribute from the Context and acts as follow: - if there is nt:resource Node
* on DefaultKeys.PATH displays it - otherwise recursively tries to get nt:resource from incoming
* node's primary items and display it - throws PathNotFoundException if no such a node found
* WARNING: this mechanizm is not suitable for big files streaming as uses byte arry buffer for data
* transfer!
*
* @author Gennady Azarenkov
* @version $Id: DisplayResourceCommand.java 13861 2007-03-28 11:31:16Z vetal_ok $
*/
public class DisplayResourceCommand implements Command
{
public static String DEFAULT_MAPPING = "/jcr";
public static String DEFAULT_ENCODING = "UTF-8";
private String pathKey = DefaultKeys.PATH;
/*
* (non-Javadoc)
* @see org.apache.commons.chain.Command#execute(org.apache.commons.chain.Context)
*/
public boolean execute(Context context) throws Exception
{
GenericWebAppContext webCtx = (GenericWebAppContext)context;
HttpServletResponse response = webCtx.getResponse();
HttpServletRequest request = webCtx.getRequest();
// standalone request?
String servletPath = request.getPathInfo();
boolean doClose = true;
// or included?
if (servletPath == null)
{
servletPath = (String)request.getAttribute("javax.servlet.include.path_info");
if (servletPath != null)
doClose = false;
}
Node file = (Node)webCtx.getSession().getItem((String)context.get(pathKey));
file.refresh(false);
Node content = null;
try
{
content = JCRCommandHelper.getNtResourceRecursively(file);
}
catch (ItemNotFoundException e)
{
// Patch for ver 1.0 back compatibility
// as exo:image was not primary item
if (file.isNodeType("exo:article"))
{
try
{
content = file.getNode("exo:image");
}
catch (PathNotFoundException e1)
{
throw e; // new ItemNotFoundException("No nt:resource node found at
// "+file.getPath()+" nor primary items of nt:resource type
// ");
}
}
else
{
throw e; // new ItemNotFoundException("No nt:resource node found at
// "+file.getPath()+" nor primary items of nt:resource type
// ");
}
}
// if(file.isNodeType("nt:file")) {
// content = file.getNode("jcr:content");
// } else if(file.isNodeType("exo:article")) {
// content = file.getNode("exo:image");
// } else
// throw new Exception("Invalid node type, expected nt:file or exo:article,
// have "+file.getPrimaryNodeType().getName()+" at "+file.getPath());
Property data;
try
{
data = content.getProperty("jcr:data");
}
catch (PathNotFoundException e)
{
throw new PathNotFoundException("No jcr:data node found at " + content.getPath());
}
String mime = content.getProperty("jcr:mimeType").getString();
String encoding =
content.hasProperty("jcr:encoding") ? content.getProperty("jcr:encoding").getString() : DEFAULT_ENCODING;
MimeTypeResolver resolver = new MimeTypeResolver();
String fileName = file.getName();
String fileExt = "";
if (fileName.lastIndexOf(".") > -1)
{
fileExt = fileName.substring(fileName.lastIndexOf(".") + 1);
fileName = fileName.substring(0, fileName.lastIndexOf("."));
}
String mimeExt = resolver.getExtension(mime);
if (fileExt == null || fileExt.length() == 0)
{
fileExt = mimeExt;
}
response.setContentType(mime + "; charset=" + encoding);
String parameter = (String)context.get("cache-control-max-age");
String cacheControl = parameter == null ? "" : "public, max-age=" + parameter;
response.setHeader("Cache-Control: ", cacheControl);
response.setHeader("Pragma: ", ""); // leave blank to avoid IE errors
response.setHeader("Content-disposition", "attachment; filename=\"" + fileName + "." + fileExt + "\"");
if (mime.startsWith("text"))
{
PrintWriter out = response.getWriter();
out.write(data.getString());
out.flush();
if (doClose)
out.close();
}
else
{
InputStream is = data.getStream();
byte[] buf = new byte[is.available()];
is.read(buf);
ServletOutputStream os = response.getOutputStream();
os.write(buf);
os.flush();
if (doClose)
os.close();
}
return true;
}
/**
* @return path Key
*/
public String getPathKey()
{
return pathKey;
}
}