/*
* Copyright 2009-2013 PrimeTek.
*
* Licensed 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.primefaces.webapp.filter;
import java.io.File;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.faces.context.FacesContext;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.FileCleanerCleanup;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.FileCleaningTracker;
import org.primefaces.util.Constants;
import org.primefaces.webapp.MultipartRequest;
public class FileUploadFilter implements Filter {
private final static Logger logger = Logger.getLogger(FileUploadFilter.class.getName());
private final static String THRESHOLD_SIZE_PARAM = "thresholdSize";
private final static String UPLOAD_DIRECTORY_PARAM = "uploadDirectory";
private String thresholdSize;
private String uploadDir;
private boolean bypass;
public void init(FilterConfig filterConfig) throws ServletException {
boolean isAtLeastJSF22 = detectJSF22();
String uploader = filterConfig.getServletContext().getInitParameter(Constants.ContextParams.UPLOADER);
if(uploader == null || uploader.equals("auto"))
bypass = isAtLeastJSF22 ? true : false;
else if(uploader.equals("native"))
bypass = true;
else if(uploader.equals("commons"))
bypass = false;
thresholdSize = filterConfig.getInitParameter(THRESHOLD_SIZE_PARAM);
uploadDir = filterConfig.getInitParameter(UPLOAD_DIRECTORY_PARAM);
if(logger.isLoggable(Level.FINE))
logger.fine("FileUploadFilter initiated successfully");
}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException {
if(bypass) {
filterChain.doFilter(request, response);
return;
}
HttpServletRequest httpServletRequest = (HttpServletRequest) request;
boolean isMultipart = ServletFileUpload.isMultipartContent(httpServletRequest);
if(isMultipart) {
if(logger.isLoggable(Level.FINE))
logger.fine("Parsing file upload request");
DiskFileItemFactory diskFileItemFactory = new DiskFileItemFactory();
if(thresholdSize != null) {
diskFileItemFactory.setSizeThreshold(Integer.valueOf(thresholdSize));
}
if(uploadDir != null) {
diskFileItemFactory.setRepository(new File(uploadDir));
}
FileCleaningTracker fileCleaningTracker = FileCleanerCleanup.getFileCleaningTracker(httpServletRequest.getSession().getServletContext());
if(fileCleaningTracker != null) {
diskFileItemFactory.setFileCleaningTracker(fileCleaningTracker);
}
ServletFileUpload servletFileUpload = new ServletFileUpload(diskFileItemFactory);
MultipartRequest multipartRequest = new MultipartRequest(httpServletRequest, servletFileUpload);
if(logger.isLoggable(Level.FINE))
logger.fine("File upload request parsed succesfully, continuing with filter chain with a wrapped multipart request");
filterChain.doFilter(multipartRequest, response);
}
else {
filterChain.doFilter(request, response);
}
}
public void destroy() {
if(logger.isLoggable(Level.FINE))
logger.fine("Destroying FileUploadFilter");
}
private boolean detectJSF22() {
String version = FacesContext.class.getPackage().getImplementationVersion();
if(version != null) {
return version.startsWith("2.2");
}
else {
//fallback
try {
Class.forName("javax.faces.flow.Flow");
return true;
}
catch (ClassNotFoundException ex) {
return false;
}
}
}
}