Embedded attachments not being sent

There has been a change to GlideSysAttachment from when some of our original extract attachments scripts were written, and when now passing the base64 decoded string as a byte array to the global GlideSysAttachment.write() method. Unifi has specialised debugging and because of this, the byte array ends up as null when Unifi debug mode is off. We suspect this is because ServiceNow routes the variable through some coercion in the Rhino environment when passing it through Unifi which forces it to work. Without the debug mode turned on, the byte array is being passed through and for some reason that isn't clear, it is treated differently.

You need to update the extract attachment script to something similar below:

payload = (function extractAttachments(payload, request) {

  function saveAttachment(record, filename, content_type, data) {
    var id;

    if (typeof filename === 'undefined') {
      x_snd_eb.ws_console.warn('Ignoring attachment with missing filename attribute.');
      id = 'x-attachment-error-missing-filename';
    } else if (!filename) {
      x_snd_eb.ws_console.warn('Ignoring attachment with empty filename attribute.');
      id = 'x-attachment-error-filename-is-empty';
    } else {  
      // use x_snd_eb scope to force using the scoped version of GSA
      id = new x_snd_eb.GlideSysAttachment().writeBase64(record, filename, content_type, data);
      x_snd_eb.ws_console.trace('Extracted attachment [' + filename + ':' + content_type + ']' +
        ' to record [' + id + ']' +
        ' for [' + record.getTableName() + ':' + record.sys_id + ']');
    }

    // return the original tag with the sys_id of the new attachment record
    // so Unifi can pick it up in processing later on
    return '[x-attachment-data sys_id="' + id + '" /]';
  }

  var obj = JSON.parse(payload);

  obj.attachment.data = saveAttachment(
    request, 
    obj.attachment.filename, 
    obj.attachment.mime_code, 
    obj.attachment.data
  );

  return JSON.stringify(obj);
})(payload, request);