Java Backed Web Scripts - File Upload

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mocathe1st

Hi all,

I've been trying to create a Java Backed Web Script that will allow clients to upload files via POST. The main problem I'm getting is that no parameters seem to be present in the request object when I send a form as a multipart/form-data. I've written the following code to test if anything's getting through which shows the number of items in the uploaded request:

public void execute(WebScriptRequest req, WebScriptResponse res)
        throws IOException
    {
       try
       {
          HttpServletRequest httpReq = ((WebScriptServletRequest)req).getHttpServletRequest();
           FileItemFactory factory = new DiskFileItemFactory();
           ServletFileUpload upload = new ServletFileUpload(factory);
          
           List items = upload.parseRequest(httpReq);
           res.getWriter().write("no items: "+items.size());
          
           Iterator iter = items.iterator();
          
           while(iter.hasNext())
           {
              FileItem item = (FileItem)iter.next();
              if(item.isFormField())
              {
                 res.getWriter().write("\nIs Form Field");
                 res.getWriter().write("\nField Name: "+item.getFieldName());
              }
              else
              {
                 res.getWriter().write("\nIs Uploaded File");
                 res.getWriter().write("\nField Name: "+item.getFieldName());
              }
           }
          
       }
       catch(Exception e)
       {
          res.getWriter().write("Error in processing web service\n\n"+
                e.getMessage()+"\n\n"+
                e.getStackTrace()+"\n\n"+
                e.getCause()+"\n\n"+
                "error class= "+e.getClass());
       }
    }

I've written a test HTML page with a multipart/form-data form that allows uploading a file via <input type="file" name="testfile"/> and I also send a hidden input as such: <input type="hidden" name="test" value="test"/>. I don't seem to be able to get access to either of these. Removing the enctype in the form and with removing the file input, I can access the hidden input using req.getParameter("test") but am not able to access it as above.

Any help would be greatly appreciated, I've been pulling my hair out with this for a while now. File uploading seems to be an absolute nightmare with Java, I just wish that Alfresco was written in PHP…. :x  (unfortunately, due to the requirements of the project I'm currently working, a Java solution has to be used)

Thanks,
Malcolm Murray

jbarmash

i am not sure what's going on, but in your test page, are you setting enc-type?

From:
http://htmlhelp.com/reference/html40/forms/input.html

The following example allows the user to upload an HTML document for validation:

<FORM METHOD=post ACTION="/cgi-bin/validate.cgi" ENCTYPE="multipart/form-data">
<P>Select an HTML document to upload and validate. If your browser does not support form-based file upload, use one of our <A HREF="methods.html">alternate methods of validation</A>.</P>
<P><INPUT TYPE=file NAME="html_file" ACCEPT="text/html"></P>
<P><INPUT TYPE=submit VALUE="Validate it!"></P>
</FORM>