Posting Attachments through Scripted REST API

[anthonydalferro]

We have a requirement where a third part application needs to send an attachment to Service Now and attach it to a record.  We cannot use the out of box Attachment API as that requires the Sys Id of the record being updated and they won't have it.  So I am building a Scripted Rest API based on the following GlideSysAttachment command.

https://developer.servicenow.com/dev.do#!/reference/api/washingtondc/server/no-namespace/c_GlideSysA...

I have tried to add this sample code from the documentation and updated the sys id of an incident that exists in my instance.

var attachment = new GlideSysAttachment();

var rec = new GlideRecord('incident');

var incidentSysID = 'ab1b30031b04ec101363ff37dc4bcbfc';

rec.get(incidentSysID);

var fileName = 'example.txt';

var contentType = 'text/csv';

var base64Encodedcontent = 'SSBhbSB0ZXh0Lg==';

var agr = attachment.writeBase64(rec, fileName, contentType, base64Encodedcontent);

gs.info('The attachment sys_id is: ' + agr);

When I run this through fix script to test the logic, I get the following message,

GlideTime - unparseable date: invalid function
*** Script: The attachment sys_id is: undefined

And the attachment does not get added.  What am I doing wrong?  Should this work through a fix script as a test?

[Nikolay Megdano]

Maybe you are running it in global scope. This method doesn't seem to be supported in global. Copy/paste it in background script, pick any other scope and run it.