Re: Uploading multiple files using Oreilly MultipartRequest class

This is a sample code from a servlet that allows multiple file
attachments. The paths of the different files are placed in a vector:

if (button.equalsIgnoreCase("Attach")) {

               Vector mfiles = (Vector)session.getAttribute("files");

               //upload file to server
                MultipartRequest mr = new
MultipartRequest(request,uploadDirectory);

                Enumeration params = mr.getParameterNames();

                while (params.hasMoreElements()) {
                      String name = (String)params.nextElement();
                      String value = mr.getParameter(name);
                      System.out.println(name + " = " + value);
                }

                boolean attached = false;

                Enumeration files = mr.getFileNames();

                while (files.hasMoreElements()) {
                    String name = (String)files.nextElement();
                    String filename = mr.getFilesystemName(name);
                    if (filename==null){
                        System.out.println("\nDCA_TEC/Attach:File
attached is null");
                        String mailmsg = "Error: No file selected for
attachment.";
                        session.setAttribute("mailmsg",mailmsg);

response.sendRedirect("/NASApp/DCA_TEC/Message.jsp");
                        break;
                    }
                    String type = mr.getContentType(name);
                    File f = mr.getFile(name);
                    System.out.println("\nDCA_TEC/Attach:name:"+name);

System.out.println("\nDCA_TEC/Attach:filename:"+filename);
                    System.out.println("\nDCA_TEC/Attach:type:"+type);
                    if (f!=null){

System.out.println("\nDCA_TEC/Attach:length:"+f.length());
                        path = f.getAbsolutePath();
                        f.deleteOnExit();

System.out.println("\nDCA_TEC/Attach:path:"+f.getAbsolutePath());

                    }
                    //check if attached file is not one of the
following: exe, bat, com, dll
                    //if it is, remove the file from the server
                    boolean allowed = false;
                    String extension =
filename.substring((filename.length()-4),filename.length());
                    String[] allowedfiles =
{".avi",".bmp",".css",".csv",".doc",".dot",".gif",".htm",

"html",".ico",".jpe","jpeg",".jpg",".log",".lzh",".mdb",

".mid",".mp3",".pdf",".pps",".ppt",".rtf",".tar",".tif",

".txt",".wav",".xlb",".xls",".xml",".zip",".ear",".war",

".jar",".snp",".mpp",".mpe","mpeg",".mpg",".wks",".wk1",

".wk3",".wk4",".dbf",".xlt",".xlw",".prn",".spl",".swf",
                                        ".dif",".pcx",".rm" };

                    for(int x=0;x<allowedfiles.length;x++){
                        if (extension.equalsIgnoreCase(allowedfiles[x])){
                            allowed = true;
                        }
                    }
                    if (allowed==false) {
                        if (f.exists()){
                            boolean deleted = false;
                            deleted = f.delete();
                            if (deleted){

System.out.println("\nDCA_TEC/Attach:file deleted");
                            }else {

System.out.println("\nDCA_TEC/Attach:file not deleted.should be removed
manually.");
                            }
                            attached = true;
                            String mailmsg = "Attachment fails. File
selected may be potentially risky.";
                            session.setAttribute("mailmsg",mailmsg);
                        }
                    }
                }

Amit L Kanaskar wrote:

>Hi,
>
>I want to upload some files to the server from a applet. I am using the
>com.oreilly.servlet.MultipartRequest class and it works for a single file.
>Is it possible to do it for multiple files also ?
>It would be very helpful if there is any sample code available. I checked on
>the internet but all the examples are for form based upload.
>
>Thank you in advance,
>amit.
>
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