How to solve java.io.IOException: Corrupt form data: premature ending

Question

hei evryone!
Does anyone knows how to solve this bug?
java.io.IOException: Corrupt form data: premature ending
Im using Oreilly's cos.jar MultipartRequest
here is my form :
<FORM METHOD="POST" NAME="uploadform" action="mbbfile" ENCTYPE="multipart/form-data">
<TR>
<TD>Select a File:</TD>
<TD><INPUT TYPE="FILE" NAME="srcfile" style="width:400px"/></TD>
</TR>
<TR><TD><INPUT TYPE="SUBMIT" VALUE="Send"/></TD></TR>
</FORM>
HERE IS mbbfile which is a servlet :
package mbb.servlet;
import java.io.IOException;
import java.sql.Connection;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.oreilly.servlet.MultipartRequest;
import org.jconfig.Configuration;
import org.jconfig.ConfigurationManager;
public class MBBFileServlet extends HttpServlet{
     private static final Configuration conf = ConfigurationManager.getConfiguration("ConfigFile");
     public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException
          String filePath = conf.getProperty("FilePath", "", "test");
          try{
          MultipartRequest multi = new MultipartRequest(req,filePath,5*1024*1024);
          }catch(Exception e){
               System.out.println("MBBFileServlet Exception ---> "+e.getMessage());
     public void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException
          doGet(req,res);
Sometimes it works meaning the file is uploaded in the directory without any exception, sometimes the file is uploaded but with exception on the log saying "MBBFileServlet Exception ---> Corrupt form data: Premature Ending". and sometimes the files is not uploaded at all and when i check the error is : "MBBFileServlet Exception ---> Corrupt form data: Premature Ending". Can anyone please help me on this matter. Thx!
Your response would be deeply appreciated.
br,
TAC

Answer 1

Hi all!
Since I've spent some days now trying to figure out what was wrong with my file upload in Struts 1.1, I would like to share my solution with the rest of you in order to spare you for the same amout of wasted time I've spent :-)
My platform is Resin 3.0.8 and Struts 1.1. My problem was that JPEG's got corrupted when arriviving at the server. After a few days searching on the net, I tried with a plain servlet and the O'Reilly package, and the app worked perfect.
Here is my servlet:
package no.yourcompany.yourapp.servlet;
import com.oreilly.servlet.multipart.MultipartParser;
import com.oreilly.servlet.multipart.Part;
import com.oreilly.servlet.multipart.FilePart;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.ServletException;
import javax.servlet.ServletContext;
import javax.servlet.RequestDispatcher;
import java.io.IOException;
import java.io.ByteArrayOutputStream;
public class ImageUpload extends HttpServlet {
private static final String PAGE_RECEIPT = "/popImageUploadReceipt.do";
private static final int MAX_FILE_SIZE_IN_BYTES = 10000000; // 10 M
* Extracts image from request and puts it into person form.
* @see HttpServlet#doPost(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// custom beans from my project, not defined here
PersonRegistrationForm personRegistrationForm = null;
PortraitImage portraitImage = null;
ByteArrayOutputStream outputStream = null;
Part currentPart = null;
FilePart currFilePart = null;
personRegistrationForm = (PersonRegistrationForm) request.getSession().getAttribute(DsnSessionKeyConstantsIF.KEY_PERSON_FORM);
portraitImage = personRegistrationForm.getPortraitImage();
try {
MultipartParser parser = new MultipartParser(request, MAX_FILE_SIZE_IN_BYTES);
while ((currentPart = parser.readNextPart()) != null) {
if (currentPart.isFile()) {
currFilePart = (FilePart) currentPart;
outputStream = new ByteArrayOutputStream();
currFilePart.writeTo(outputStream);
// portraitImage is just a bean for encapsulating image data, not defined in this posting
portraitImage.setContentType(currFilePart.getContentType());
portraitImage.setImageAsByteArray(outputStream.toByteArray());
portraitImage.setOriginalFileName(currFilePart.getFileName());
break;
} // if (currentPart.isFile())
} // while ((currentPart = parser.readNextPart()) != null)
} catch (IOException ioe) {
// noop
// redirect to receipt page
ServletContext servletContext = this.getServletContext();
RequestDispatcher requestDispatcher = servletContext.getRequestDispatcher(PAGE_RECEIPT);
requestDispatcher.forward(request, response);
} // doPost
} // ImageUpload
AND ADD THIS TO YOUR WEB.XML
<servlet>
<servlet-name>ImageUpload</servlet-name>
<servlet-class>no.yourcompany.yourapp.servlet.ImageUpload</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ImageUpload</servlet-name>
<url-pattern>imageUpload.do</url-pattern>
</servlet-mapping>
AND THE HTML-FORM IS HERE
<form action="/yourapp/imageUpload.do" method="post" enctype="multipart/form-data" accept="image/*">
<p>
<input type="file" name="portraitImage" />
</p>
<p>
<input type="image" src="/dsn/img/btn_last_bilde.gif" border="0">
</p>
</form>