package org.jbpm.designer.server;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
/**
* Copyright (c) 2008 Stefan Krumnow.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
public class EPCUpload extends HttpServlet {
private static final long serialVersionUID = 316274845723034029L;
// private static Configuration config = null;
/**
* The POST request.
*/
protected void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException {
// No isMultipartContent => Error
final boolean isMultipartContent = ServletFileUpload.isMultipartContent(req);
if (!isMultipartContent){
printError(res, "No Multipart Content transmitted.");
return ;
}
// Get the uploaded file
final FileItemFactory factory = new DiskFileItemFactory();
final ServletFileUpload servletFileUpload = new ServletFileUpload(factory);
servletFileUpload.setSizeMax(-1);
final List<?> items;
try {
items = servletFileUpload.parseRequest(req);
if (items.size() != 1){
printError(res, "Not exactly one File.");
return ;
}
} catch (FileUploadException e) {
handleException(res, e);
return;
}
final FileItem fileItem = (FileItem)items.get(0);
// Get filename and content (needed to distinguish between EPML and AML)
final String fileName = fileItem.getName();
String content = fileItem.getString();
// Get the input stream
final InputStream inputStream;
try {
inputStream = fileItem.getInputStream();
} catch (IOException e){
handleException(res, e);
return;
}
// epml2eRDF XSLT source
final String xsltFilename = getServletContext().getRealPath("/xslt/EPML2eRDF.xslt");
// final String xsltFilename = System.getProperty("catalina.home") + "/webapps/oryx/xslt/EPML2eRDF.xslt";
final File epml2eRDFxsltFile = new File(xsltFilename);
final Source epml2eRDFxsltSource = new StreamSource(epml2eRDFxsltFile);
// Transformer Factory
final TransformerFactory transformerFactory = TransformerFactory.newInstance();
// Get the epml source
final Source epmlSource;
if (fileName.endsWith(".epml") || content.contains("http://www.epml.de")){
epmlSource = new StreamSource(inputStream);
} else {
printError(res, "No EPML or AML file uploaded.");
return ;
}
// Get the result string
String resultString = null;
try {
Transformer transformer = transformerFactory.newTransformer(epml2eRDFxsltSource);
StringWriter writer = new StringWriter();
transformer.transform(epmlSource, new StreamResult(writer));
resultString = writer.toString();
} catch (Exception e){
handleException(res, e);
return;
}
if (resultString != null){
try {
printResponse( res, resultString );
} catch (Exception e){
handleException(res, e);
return;
}
}
}
private void printResponse(HttpServletResponse res, String text){
if (res != null){
// Get the PrintWriter
res.setContentType("text/plain");
PrintWriter out = null;
try {
out = res.getWriter();
} catch (IOException e) {
e.printStackTrace();
}
out.print(text);
}
}
private void printError(HttpServletResponse res, String err){
if (res != null){
// Get the PrintWriter
res.setContentType("text/html");
PrintWriter out = null;
try {
out = res.getWriter();
} catch (IOException e) {
e.printStackTrace();
}
out.print("{success:false, content:'"+err+"'}");
}
}
private void handleException(HttpServletResponse res, Exception e) {
e.printStackTrace();
printError(res, e.getLocalizedMessage());
}
}