/*
* 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.services.rest.impl.provider;
import org.apache.commons.fileupload.DefaultFileItemFactory;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUpload;
import org.apache.commons.fileupload.FileUploadException;
import org.exoplatform.commons.utils.SecurityHelper;
import org.exoplatform.services.rest.ApplicationContext;
import org.exoplatform.services.rest.RequestHandler;
import org.exoplatform.services.rest.impl.ApplicationContextImpl;
import org.exoplatform.services.rest.provider.EntityProvider;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
import java.util.Iterator;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.Consumes;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.Provider;
/**
* Processing multipart data based on apache fileupload.
*
* @author <a href="mailto:andrew00x@gmail.com">Andrey Parfonov</a>
* @version $Id: $
*/
@Provider
@Consumes({"multipart/*"})
public class MultipartFormDataEntityProvider implements EntityProvider<Iterator<FileItem>>
{
/**
* @see HttpServletRequest
*/
@Context
private HttpServletRequest httpRequest;
/**
* {@inheritDoc}
*/
public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
{
if (type == Iterator.class)
{
try
{
ParameterizedType t = (ParameterizedType)genericType;
Type[] ta = t.getActualTypeArguments();
if (ta.length == 1 && ta[0] == FileItem.class)
{
return true;
}
return false;
}
catch (ClassCastException e)
{
return false;
}
}
return false;
}
/**
* {@inheritDoc}
*/
@SuppressWarnings("unchecked")
public Iterator<FileItem> readFrom(Class<Iterator<FileItem>> type, Type genericType, Annotation[] annotations,
MediaType mediaType, MultivaluedMap<String, String> httpHeaders, InputStream entityStream) throws IOException
{
try
{
ApplicationContext context = ApplicationContextImpl.getCurrent();
int bufferSize =
context.getProperties().get(RequestHandler.WS_RS_BUFFER_SIZE) == null
? RequestHandler.WS_RS_BUFFER_SIZE_VALUE : Integer.parseInt(context.getProperties().get(
RequestHandler.WS_RS_BUFFER_SIZE));
File repo = new File(context.getProperties().get(RequestHandler.WS_RS_TMP_DIR));
DefaultFileItemFactory factory = new DefaultFileItemFactory(bufferSize, repo);
final FileUpload upload = new FileUpload(factory);
return SecurityHelper.doPrivilegedExceptionAction(new PrivilegedExceptionAction<Iterator<FileItem>>()
{
public Iterator<FileItem> run() throws Exception
{
return upload.parseRequest(httpRequest).iterator();
}
});
}
catch (PrivilegedActionException pae)
{
Throwable cause = pae.getCause();
if (cause instanceof FileUploadException)
{
throw new IOException("Can't process multipart data item " + cause);
}
else if (cause instanceof RuntimeException)
{
throw (RuntimeException)cause;
}
else
{
throw new RuntimeException(cause);
}
}
}
/**
* {@inheritDoc}
*/
public long getSize(Iterator<FileItem> t, Class<?> type, Type genericType, Annotation[] annotations,
MediaType mediaType)
{
return -1;
}
/**
* {@inheritDoc}
*/
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
{
// output is not supported
return false;
}
/**
* {@inheritDoc}
*/
public void writeTo(Iterator<FileItem> t, Class<?> type, Type genericType, Annotation[] annotations,
MediaType mediaType, MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream) throws IOException
{
throw new UnsupportedOperationException();
}
}