handle file upload as stream example

gistfile1.cfm

component {

  jServletFileUpload = createObject("java","org.apache.commons.fileupload.servlet.ServletFileUpload");
	jStreams = createObject("java","org.apache.commons.fileupload.util.Streams");
	jByteArrayOutputStream = createObject("java","java.io.ByteArrayOutputStream");
	
	function getFormItems() {
       //var out = getPageContext().getResponse().getWriter();
       var htRequest = getPageContext().getRequest();
       var bao = jByteArrayOutputStream.init();
       var contentLength = htRequest.getContentLength(); 
       var contentType = htRequest.getHeader("Content-Type");
       var isMultipart = jServletFileUpload.isMultipartContent(htRequest);
       var items = [];
       if(isMultipart){
              var upload = jServletFileUpload.init();
              var iter = upload.getItemIterator(htRequest);
              var item = "";
              var name = "";
              var stream = "";
              while (iter.hasNext()){
                 item = iter.next();
                 name = item.getFieldName();
                 stream = item.openStream();
                 if(item.isFormField()){
                 	arrayAppend(items,{name:name, value:jStreams.asString(stream)});
                 }
                 else {
                     systemOutput("name==" & name);
                     if(!isNull(name) && name != ""){
                        var fileName = item.getName();
                        //var file = jFile.init(getServletContext().getRealPath("/" & fileName));
                        //var fos = jFileOutputStream.init(file);
                        var fileSize = jStreams.copy(stream, bao, true);
                        bao.close();
                        stream.close();
                 		arrayAppend(items,{filename:fileName, fileSize:fileSize, bytes:bao});
                     }
                 }
              }
       	}
       	return items;
	}
}

How do you two handle validation here?