code: public void actionUpload() throws PageException {
  	FormItem item = getFormItem(pageContext, filefield);
  	Struct cffile = _actionUpload(pageContext, securityManager, item, strDestination, nameconflict, accept, strict, mode, attributes, acl, serverPassword);
  	if (StringUtil.isEmpty(result)) {
  	    pageContext.undefinedScope().set(KeyConstants._file, cffile);
  	    pageContext.undefinedScope().set("cffile", cffile);
  	}
  	else {
  	    pageContext.setVariable(result, cffile);
  	}
      }
docs: read source file
  
  @throws PageException