Handling Form Requests With File Uploads

• Form data encoded with "multipart/form-data" encoding, rather than "application/x-www-form-urlencoded".

• JSF does not handle multipart/form-data.

• Use a servlet filter that intercepts a file upload and:
  • Uses Apache Commons file upload library for decoding the multipart/form-data request.

  • Turns uploaded files into request attributes.

  • Turns other form data into request parameters.

• JSF application processes request parameters unaware that they were not URL encoded originally.

• Here is the servlet filter: UploadFilter.java