Append data to an attachment without reloading it's large size content

[A Elbarbary]

Hi community,

There is a situation where I need to process large chunks of data (coming from a web service) and write it to an attachment. The problem with GlideSysAttachment.write or GlideSysAttachment.writeContent is that it requires all the content at once and I believe that it will be too large to fit in memory (I don't have clues yet how large the data would be but I know it will be very).

Due to this, I wanted to know if it's possible to dump first page then programmatically append next pages to the existing attachment. I tried to add base64 data to to table sys_attachment_doc  but that didn't work, also I searched the documentation and the only file stream class GlideScriptableInputStream/GlideTextReader provides only reading capabilities.

Thanks in advance.

[Tushar]

Hi there,

One of my friend had the same use case and I remember them implementing an external cloud storage service rather than storing it directly in ServiceNow.

Thanks,

Tushar