/*
* $Id: PellMultiPartRequest.java 1099157 2011-05-03 17:53:55Z jogep $
*
* 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.struts2.dispatcher.multipart;
import http.utils.multipartrequest.ServletMultipartRequest;
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.StrutsConstants;
import com.opensymphony.xwork2.inject.Inject;
import com.opensymphony.xwork2.util.logging.Logger;
import com.opensymphony.xwork2.util.logging.LoggerFactory;
/**
* Multipart form data request adapter for Jason Pell's multipart utils package.
*
*/
public class PellMultiPartRequest implements MultiPartRequest {
private static final Logger LOG = LoggerFactory.getLogger(PellMultiPartRequest.class);
private ServletMultipartRequest multi;
private String defaultEncoding;
private boolean maxSizeProvided;
private int maxSize;
@Inject(StrutsConstants.STRUTS_I18N_ENCODING)
public void setDefaultEncoding(String enc) {
this.defaultEncoding = enc;
}
@Inject(StrutsConstants.STRUTS_MULTIPART_MAXSIZE)
public void setMaxSize(String maxSize) {
this.maxSizeProvided = true;
this.maxSize = Integer.parseInt(maxSize);
}
/**
* Creates a new request wrapper to handle multi-part data using methods adapted from Jason Pell's
* multipart classes (see class description).
*
* @param saveDir the directory to save off the file
* @param servletRequest the request containing the multipart
*/
public void parse(HttpServletRequest servletRequest, String saveDir) throws IOException {
//this needs to be synchronised, as we should not change the encoding at the same time as
//calling the constructor. See javadoc for MultipartRequest.setEncoding().
synchronized (this) {
setEncoding();
if (maxSizeProvided){
multi = new ServletMultipartRequest(servletRequest, saveDir, maxSize);
}else{
multi = new ServletMultipartRequest(servletRequest, saveDir);
}
}
}
public Enumeration getFileParameterNames() {
return multi.getFileParameterNames();
}
public String[] getContentType(String fieldName) {
return new String[]{multi.getContentType(fieldName)};
}
public File[] getFile(String fieldName) {
return new File[]{multi.getFile(fieldName)};
}
public String[] getFileNames(String fieldName) {
// TODO - not sure about this - is this the filename of the actual file or
// TODO - the uploaded filename as provided by the browser?
// TODO - Not sure what version of Pell this class uses as it doesn't seem to be the latest
return new String[]{multi.getFile(fieldName).getName()};
}
public String[] getFilesystemName(String fieldName) {
return new String[]{multi.getFileSystemName(fieldName)};
}
public String getParameter(String name) {
return multi.getURLParameter(name);
}
public Enumeration getParameterNames() {
return multi.getParameterNames();
}
public String[] getParameterValues(String name) {
Enumeration enumeration = multi.getURLParameters(name);
if (!enumeration.hasMoreElements()) {
return null;
}
List values = new ArrayList();
while (enumeration.hasMoreElements()) {
values.add(enumeration.nextElement());
}
return (String[]) values.toArray(new String[values.size()]);
}
public List getErrors() {
return Collections.EMPTY_LIST;
}
/**
* Sets the encoding for the uploaded params. This needs to be set if you are using character sets other than
* ASCII.
* <p/>
* The encoding is looked up from the configuration setting 'struts.i18n.encoding'. This is usually set in
* default.properties & struts.properties.
*/
private void setEncoding() {
String encoding = null;
try {
encoding = defaultEncoding;
if (encoding != null) {
//NB: This should never be called at the same time as the constructor for
//ServletMultiPartRequest, as it can cause problems.
//See javadoc for MultipartRequest.setEncoding()
http.utils.multipartrequest.MultipartRequest.setEncoding(encoding);
} else {
http.utils.multipartrequest.MultipartRequest.setEncoding("UTF-8");
}
} catch (IllegalArgumentException e) {
if (LOG.isInfoEnabled()) {
LOG.info("Could not get encoding property 'struts.i18n.encoding' for file upload. Using system default");
}
} catch (UnsupportedEncodingException e) {
LOG.error("Encoding " + encoding + " is not a valid encoding. Please check your struts.properties file.");
}
}
}