org.apache.struts2.dispatcher.multipart.JakartaMultiPartRequest Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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* 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 org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadBase;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.RequestContext;
import org.apache.commons.fileupload.disk.DiskFileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.struts2.dispatcher.LocalizedMessage;
import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.*;
/**
* Multipart form data request adapter for Jakarta Commons Fileupload package.
*/
public class JakartaMultiPartRequest extends AbstractMultiPartRequest {
static final Logger LOG = LogManager.getLogger(JakartaMultiPartRequest.class);
// maps parameter name -> List of FileItem objects
protected Map> files = new HashMap<>();
// maps parameter name -> List of param values
protected Map> params = new HashMap<>();
/**
* 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 request the request containing the multipart
* @throws java.io.IOException is thrown if encoding fails.
*/
public void parse(HttpServletRequest request, String saveDir) throws IOException {
try {
setLocale(request);
processUpload(request, saveDir);
} catch (FileUploadException e) {
LOG.warn("Request exceeded size limit!", e);
LocalizedMessage errorMessage;
if(e instanceof FileUploadBase.SizeLimitExceededException) {
FileUploadBase.SizeLimitExceededException ex = (FileUploadBase.SizeLimitExceededException) e;
errorMessage = buildErrorMessage(e, new Object[]{ex.getPermittedSize(), ex.getActualSize()});
} else {
errorMessage = buildErrorMessage(e, new Object[]{});
}
if (!errors.contains(errorMessage)) {
errors.add(errorMessage);
}
} catch (Exception e) {
LOG.warn("Unable to parse request", e);
LocalizedMessage errorMessage = buildErrorMessage(e, new Object[]{});
if (!errors.contains(errorMessage)) {
errors.add(errorMessage);
}
}
}
protected void processUpload(HttpServletRequest request, String saveDir) throws FileUploadException, UnsupportedEncodingException {
if (ServletFileUpload.isMultipartContent(request)) {
for (FileItem item : parseRequest(request, saveDir)) {
LOG.debug("Found file item: [{}]", item.getFieldName());
if (item.isFormField()) {
processNormalFormField(item, request.getCharacterEncoding());
} else {
processFileField(item);
}
}
}
}
protected void processFileField(FileItem item) {
LOG.debug("Item is a file upload");
// Skip file uploads that don't have a file name - meaning that no file was selected.
if (item.getName() == null || item.getName().trim().length() < 1) {
LOG.debug("No file has been uploaded for the field: {}", item.getFieldName());
return;
}
List values;
if (files.get(item.getFieldName()) != null) {
values = files.get(item.getFieldName());
} else {
values = new ArrayList<>();
}
values.add(item);
files.put(item.getFieldName(), values);
}
protected void processNormalFormField(FileItem item, String charset) throws UnsupportedEncodingException {
LOG.debug("Item is a normal form field");
List values;
if (params.get(item.getFieldName()) != null) {
values = params.get(item.getFieldName());
} else {
values = new ArrayList<>();
}
// note: see http://jira.opensymphony.com/browse/WW-633
// basically, in some cases the charset may be null, so
// we're just going to try to "other" method (no idea if this
// will work)
if (charset != null) {
values.add(item.getString(charset));
} else {
values.add(item.getString());
}
params.put(item.getFieldName(), values);
item.delete();
}
protected List parseRequest(HttpServletRequest servletRequest, String saveDir) throws FileUploadException {
DiskFileItemFactory fac = createDiskFileItemFactory(saveDir);
ServletFileUpload upload = createServletFileUpload(fac);
return upload.parseRequest(createRequestContext(servletRequest));
}
protected ServletFileUpload createServletFileUpload(DiskFileItemFactory fac) {
ServletFileUpload upload = new ServletFileUpload(fac);
upload.setSizeMax(maxSize);
return upload;
}
protected DiskFileItemFactory createDiskFileItemFactory(String saveDir) {
DiskFileItemFactory fac = new DiskFileItemFactory();
// Make sure that the data is written to file
fac.setSizeThreshold(0);
if (saveDir != null) {
fac.setRepository(new File(saveDir));
}
return fac;
}
/* (non-Javadoc)
* @see org.apache.struts2.dispatcher.multipart.MultiPartRequest#getFileParameterNames()
*/
public Enumeration getFileParameterNames() {
return Collections.enumeration(files.keySet());
}
/* (non-Javadoc)
* @see org.apache.struts2.dispatcher.multipart.MultiPartRequest#getContentType(java.lang.String)
*/
public String[] getContentType(String fieldName) {
List items = files.get(fieldName);
if (items == null) {
return null;
}
List contentTypes = new ArrayList<>(items.size());
for (FileItem fileItem : items) {
contentTypes.add(fileItem.getContentType());
}
return contentTypes.toArray(new String[contentTypes.size()]);
}
/* (non-Javadoc)
* @see org.apache.struts2.dispatcher.multipart.MultiPartRequest#getFile(java.lang.String)
*/
public UploadedFile[] getFile(String fieldName) {
List items = files.get(fieldName);
if (items == null) {
return null;
}
List fileList = new ArrayList<>(items.size());
for (FileItem fileItem : items) {
File storeLocation = ((DiskFileItem) fileItem).getStoreLocation();
if (fileItem.isInMemory() && storeLocation != null && !storeLocation.exists()) {
try {
storeLocation.createNewFile();
} catch (IOException e) {
LOG.error("Cannot write uploaded empty file to disk: {}", storeLocation.getAbsolutePath(), e);
}
}
fileList.add(new StrutsUploadedFile(storeLocation));
}
return fileList.toArray(new UploadedFile[fileList.size()]);
}
/* (non-Javadoc)
* @see org.apache.struts2.dispatcher.multipart.MultiPartRequest#getFileNames(java.lang.String)
*/
public String[] getFileNames(String fieldName) {
List items = files.get(fieldName);
if (items == null) {
return null;
}
List fileNames = new ArrayList<>(items.size());
for (FileItem fileItem : items) {
fileNames.add(getCanonicalName(fileItem.getName()));
}
return fileNames.toArray(new String[fileNames.size()]);
}
/* (non-Javadoc)
* @see org.apache.struts2.dispatcher.multipart.MultiPartRequest#getFilesystemName(java.lang.String)
*/
public String[] getFilesystemName(String fieldName) {
List items = files.get(fieldName);
if (items == null) {
return null;
}
List fileNames = new ArrayList<>(items.size());
for (FileItem fileItem : items) {
fileNames.add(((DiskFileItem) fileItem).getStoreLocation().getName());
}
return fileNames.toArray(new String[fileNames.size()]);
}
/* (non-Javadoc)
* @see org.apache.struts2.dispatcher.multipart.MultiPartRequest#getParameter(java.lang.String)
*/
public String getParameter(String name) {
List v = params.get(name);
if (v != null && v.size() > 0) {
return v.get(0);
}
return null;
}
/* (non-Javadoc)
* @see org.apache.struts2.dispatcher.multipart.MultiPartRequest#getParameterNames()
*/
public Enumeration getParameterNames() {
return Collections.enumeration(params.keySet());
}
/* (non-Javadoc)
* @see org.apache.struts2.dispatcher.multipart.MultiPartRequest#getParameterValues(java.lang.String)
*/
public String[] getParameterValues(String name) {
List v = params.get(name);
if (v != null && v.size() > 0) {
return v.toArray(new String[v.size()]);
}
return null;
}
/**
* Creates a RequestContext needed by Jakarta Commons Upload.
*
* @param req the request.
* @return a new request context.
*/
protected RequestContext createRequestContext(final HttpServletRequest req) {
return new RequestContext() {
public String getCharacterEncoding() {
return req.getCharacterEncoding();
}
public String getContentType() {
return req.getContentType();
}
public int getContentLength() {
return req.getContentLength();
}
public InputStream getInputStream() throws IOException {
InputStream in = req.getInputStream();
if (in == null) {
throw new IOException("Missing content in the request");
}
return req.getInputStream();
}
};
}
/* (non-Javadoc)
* @see org.apache.struts2.dispatcher.multipart.MultiPartRequest#cleanUp()
*/
public void cleanUp() {
Set names = files.keySet();
for (String name : names) {
List items = files.get(name);
for (FileItem item : items) {
LOG.debug("Removing file {} {}", name, item );
if (!item.isInMemory()) {
item.delete();
}
}
}
}
}