RE: upload file filter in struts

[Kailash Vasani]

Hi Vijaya,

Try using isFormField() method of FileItem interface, which indicates
whether the item is form field or not.
If it is then u can use getFieldName() and getString() on FileItem to
retrieve the form field name and value
of it in String format.

Hope this would be helpful.

For details of various API used below
(http://jakarta.apache.org/commons/fileupload/apidocs/index.html)

Regards,
Kailash


-----Original Message-----
From: vijaya shetty [mailto:[EMAIL PROTECTED]
Sent: Thursday, July 22, 2004 7:05 AM
To: [EMAIL PROTECTED]
Subject: upload file filter in struts


Hi

I have an struts application which does the
authorisation in filters. Authorisation is done using
the request.getParameter("menu"). 

This filter works very fine But fails when the the
request is of enctype="multipart/form-data". i.e when
i am using the file upload in the page. 

To solve this i used the commons-fileupload to get the
Parameter. Now again the parameter is available at
filter, but the request fails at Action of Struts.

Now how do i convert the request back to the original
form. If you could get me the code, it would be highly
appreciated.

My parsing code:

      int contentLength = request.getContentLength();
      // Copy the request's input stream. 
      final ServletInputStream bis =
request.getInputStream();
      final BufferedOutputStream bos;
      final Object bodyData;
      if (contentLength > 50000)
      {
        // Use a disk file for storing the body data. 
        bodyDataFile = File.createTempFile("body-",
".data");
        bodyDataFile.deleteOnExit();
        final FileOutputStream fos = new
FileOutputStream(bodyDataFile);
        bos = new BufferedOutputStream(fos);
        bodyData = bodyDataFile;
      }
      else
      {
        // Use a byte array for storing the body data.

        final ByteArrayOutputStream baos = new
ByteArrayOutputStream();
        bos = new BufferedOutputStream(baos);
        bodyData = baos;
      }
      final int BUFFER_SIZE = 10240;
      byte[] buffer = new byte[BUFFER_SIZE];
      int toBeCopied = contentLength;
      while (toBeCopied > 0)
      {
        int read = bis.read(buffer, 0,
Math.min(BUFFER_SIZE, toBeCopied));
        bos.write(buffer, 0, read);
        toBeCopied -= read;
      }
      bis.close();
      bos.close();

      // Wrap the request in a
FileUploadHttpServletRequest for further processing. 
      chain.doFilter(new
FileUploadHttpServletRequest((HttpServletRequest)
request, bodyData), response);

Thanks
Vijaya

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