Need to create Attachments via Scripted REST API on Scoped application (HR Core) from base64 encoded data.

[Shane-DXC]

I am trying to add base64 encoded files (images, etc.) as attachments onto an HR Case (scoped) via integration with a Scripted REST API. (I am unable to use the REST Attachment API as the system sending the data is unable to provide the target record sys_id, and it also needs to include additional attributes to update the target record when it sends the attachment.)

I am able to achieve the task successfully in the Global scope without issue (other than the fact that there is a 25 Mb payload limitation), but the methods I am using in the Global scope (particularly GlideStringUtil.base64DecodeAsBytes()) are not available from the scoped application.  Is there a scoped alternative to GlideStringUtil.base64DecodeAsBytes()?

The plain method I utilized in Global scope was:

var data = '<base64 encoded image/file data>';
var attach = new GlideSysAttachment(),

//Decode base64 data
var decodedBytes = GlideStringUtil.base64DecodeAsBytes(data);
			
//Write attachment associated to target record
var attchID = attach.write(<target_GlideRecord>, <Attachment_Name>, <Attachment_Type>, decodedBytes);

If I try using the AttachmentCreator method, the ECC Queue fails to write the attachment (due to scope permissions) with an error like: "Could not find a record in table '<target_table>' with sys_id '<target_record>'."

I have been unable to pass the work over to a Global script include, as I am unable to pass back the decoded bytes for the actual creation of the attachment.

[shiven]

I have tried the "writeBase64" method in scope, unfortunately the attachment is generated using this but the file is corrupted, doesn't work for docx, image etc only works for text. 

[Ankur Bawiskar]

@shiven 

can you post a new thread and tag me there as this is an old thread?

[shiven]

@Ankur Bawiskar 

Sure