# Session 0006: SSE Streaming Backup & Upload Endpoints

**Date:** 2026-02-22
**Status:** Completed
**Origin:** MDF Webseiten session 0036

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## Work Done

- [x] Added `upload` subcommand to `offsite.py` CLI (function existed but wasn't wired)
- [x] Converted `create_backup` endpoint from plain JSON to SSE streaming
- [x] Converted `upload_offsite` endpoint from plain JSON to SSE streaming
- [x] Changed both endpoints to accept GET+POST (EventSource API requires GET)

## Key Decisions / Learnings

- EventSource (SSE) requires GET requests — endpoints serving streaming output must accept GET
- Converting to SSE streaming gives real-time feedback for long-running backup and upload operations
- offsite.py had an upload function but it was never exposed as a CLI subcommand — easy fix, high value

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**Tags:** #Session #OpsDashboard #Backups #SSE