Templates larger than 5 MB fail to upload and download

Description

Template binaries are transferred through the Forge invokeRemote channel, which caps the payload on upload and download of templates, so any template larger than ~5 MiB can be neither downloaded nor uploaded:

• Download: GET /api/templates/{id}?projectId={id} returns the file in the Forge invocation response, which the Atlassian GraphQL gateway rejects with

ResponseTooLargeException: Response must not exceed 5242880 bytes in size (statusCode 509, errorSource GRAPHQL_GATEWAY). 

• Upload: POST /api/templates/upload?installationtype=upload&id={id} sends the file in the Forge invocation request, which fails with HTTP 413 underlyingServiceCode_413 (errorSource UNDERLYING_SERVICE, service xen_invocation_service).

Pre-conditions

• A template larger than ~5 MiB. For the download case, the template must already exist.

How to reproduce

1. Open Project settings → Apps → Xporter Settings → Templates (or global Xporter Settings → Templates).
2. Try to Download or upload a template file with size > 5MB

Actual result/AttachmentsDownload fails; UI shows

• Network shows GraphQL error: Response must not exceed 5242880 bytes in size, statusCode 509, ResponseTooLargeException.
• Only large templates are affected 

Expected result

Templates upload and download successfully regardless of size.

Version

• Xporter Cloud 9.4.0

Workaround

N.A.