Flex file upload issue with large image files

Question

     Hello, I have created a sample flex application to upload an image and also created java servlet to upload and save image and deployed in local tomcat server. I am testing the application in LAN. I am able to upload small as well as large image file(1Mb) from some PCs but in some other PCs I am getting IOError while uploading large image files however it is working fine for small images. Image uploading is hanging after 10%-20% and throwing IOError. *Surprizgly it is working Ok with XP systems and causeing issues with Windows7 systems*.
Plz give me any idea to get a solution.
In Tomcat server side it is giving following error:
request: org.apache.catalina.connector.RequestFacade@c19694
org.apache.commons.fileupload.FileUploadBase$IOFileUploadException: Processing of multipart/form-data request failed. Stream ended unexpectedly
        at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:371)
        at org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.ja va:126)
        at flex.servlets.UploadImage.doPost(UploadImage.java:47)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j ava:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
        at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:877)
        at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProto col.java:594)
        at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675)
        at java.lang.Thread.run(Thread.java:722)
Caused by: org.apache.commons.fileupload.MultipartStream$MalformedStreamException: Stream ended unexpectedly
        at org.apache.commons.fileupload.MultipartStream$ItemInputStream.makeAvailable(MultipartStre am.java:982)
        at org.apache.commons.fileupload.MultipartStream$ItemInputStream.read(MultipartStream.java:8 86)
        at java.io.InputStream.read(InputStream.java:101)
        at org.apache.commons.fileupload.util.Streams.copy(Streams.java:96)
        at org.apache.commons.fileupload.util.Streams.copy(Streams.java:66)
        at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:366)
UploadImage.java:
package flex.servlets;
import java.io.*;
import java.sql.*;
import java.util.*;
import java.text.*;
import java.util.regex.*;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.*;
import sun.reflect.ReflectionFactory.GetReflectionFactoryAction;
import javax.servlet.*;
import javax.servlet.http.*;
public class UploadImage extends HttpServlet{
         * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
         *      response)
        protected void doGet(HttpServletRequest request,
                        HttpServletResponse response) throws ServletException, IOException {
                // TODO Auto-generated method stub
                doPost(request, response);
        public void doPost(HttpServletRequest request,
                        HttpServletResponse response)
        throws ServletException, IOException {
                PrintWriter out = response.getWriter();
                boolean isMultipart = ServletFileUpload.isMultipartContent(
                                request);
                System.out.println("request: "+request);
                if (!isMultipart) {
                        System.out.println("File Not Uploaded");
                } else {
                        FileItemFactory factory = new DiskFileItemFactory();
                        ServletFileUpload upload = new ServletFileUpload(factory);
                        List items = null;
                        try {
                                items = upload.parseRequest(request);
                                System.out.println("items: "+items);
                        } catch (FileUploadException e) {
                                e.printStackTrace();
                        Iterator itr = items.iterator();
                        while (itr.hasNext()) {
                                FileItem item = (FileItem) itr.next();
                                if (item.isFormField()){
                                        String name = item.getFieldName();
                                        System.out.println("name: "+name);
                                        String value = item.getString();
                                        System.out.println("value: "+value);
                                } else {
                                        try {
                                                String itemName = item.getName();
                                                Random generator = new Random();
                                                int r = Math.abs(generator.nextInt());
                                                String reg = "[.*]";
                                                String replacingtext = "";
                                                System.out.println("Text before replacing is:-" +
                                                                itemName);
                                                Pattern pattern = Pattern.compile(reg);
                                                Matcher matcher = pattern.matcher(itemName);
                                                StringBuffer buffer = new StringBuffer();
                                                while (matcher.find()) {
                                                        matcher.appendReplacement(buffer, replacingtext);
                                                int IndexOf = itemName.indexOf(".");
                                                String domainName = itemName.substring(IndexOf);
                                                System.out.println("domainName: "+domainName);
                                                String finalimage = buffer.toString()+"_"+r+domainName;
                                                System.out.println("Final Image==="+finalimage);
                                                File savedFile = new File(getServletContext().getRealPath("assets/images/")+"/LowesFloorPlan.png");
                                                //File savedFile = new File("D:/apache-tomcat-6.0.35/webapps/ROOT/example/"+"\\test.jpeg");
                                                item.write(savedFile);
                                                out.println("<html>");
                                                out.println("<body>");
                                                out.println("<table><tr><td>");
                                                out.println("");
                                                out.println("</td></tr></table>");
                                                try {
                                                        out.println("image inserted successfully");
                                                        out.println("</body>");
                                                        out.println("</html>");  
                                                } catch (Exception e) {
                                                        System.out.println(e.getMessage());
                                                } finally {
                                        } catch (Exception e) {
                                                e.printStackTrace();

Answer 1

It is only coming in Windows 7 systems and the root of this problem is SSL certificate.
Workaround for this:
Open application in IE and click on certificate error link at address bar . Click install certificate and you are done..
happy programming.
Thanks
DevSachin