Script to send attachment to third party from servicenow instance?

(function executeRule(current, previous /*null when async*/ ) {
      var attachment = new GlideRecord('sys_attachment');
      attachment.addQuery('table_sys_id', current.sys_id);
      attachment.addQuery('table_name', current.getTableName());
      attachment.query();
      while (attachment.next()) {
              sendAttachment(attachment);
      }
      function sendAttachment(att) {
              try {
                      var StringUtil = new GlideStringUtil();
                      var file_name = att.file_name.toString();
                      var gsa = GlideSysAttachmentInputStream(att.sys_id.toString());
                      var baos = new Packages.java.io.ByteArrayOutputStream();
                      gsa.writeTo(baos);
                      baos.close();
                      var base64EncodedData = StringUtil.base64Encode(baos.toByteArray());
                      sendRequest(base64EncodedData, file_name);
                                 } catch (Exception) {
                      gs.log('Failed sending Attachment to due to Exception: ' + Exception);
              }
     }
      function sendRequest(encData, file_name) {
              //Set up variables
              s.setStringParameter('attachment.filename', file_name);
              s.setStringParameter('attachment.type', encData);
      }
})(current, previous);