REST attachment

var sys_attach_gr=new GlideRecord('sys_attachment');

if (sys_attach_gr.get('sys_id', 'fb2890fddbef0700f60fe2e15b9619c9')){

 var attachmentMessage = new sn_ws.RESTMessageV2();

 attachmentMessage.setHttpMethod("post");

 attachmentMessage.setBasicAuth('smithr', 'Beethoven1');

 attachmentMessage.setEndpoint("https://mitchellsbutlersdev.service-now.com/api/now/attachment/file");

 attachmentMessage.setQueryParameter("table_name", "incident");

 attachmentMessage.setQueryParameter("table_sys_id", "2f96bf2637230f408ca1138943990e2a");

 attachmentMessage.setQueryParameter("file_name", sys_attach_gr.file_name);

 attachmentMessage.setRequestHeader("Content-Type", sys_attach_gr.content_type);

 attachmentMessage.setRequestHeader("Accept", "application/json");

 attachmentMessage.setRequestBodyFromAttachment(sys_attach_gr.sys_id);

 var response = attachmentMessage.execute();

 var responseBody = response.getBody();

 httpStatus = response.getStatusCode();

 gs.print(httpStatus + ':: ' + responseBody );

}