Stop reimplementing file uploads for your Python ASGI app. Meet tussi. Every few months I find myself in the same situation: "we need to support large file uploads" . And every time, it's a chore. This time, I decided to fix it properly to never have that headache again. I'm sharing my painkiller. What I found I discovered TUS . It's an open protocol for resumable file uploads. Clients pick up exactly where they left off after a network drop. There are TUS clients for multiple platforms and languages. I checked out the existing Python server implementations. None of them fit my use case: Most require a database to track upload state Some need a separate daemon process Multi-worker safety is either missing or poorly documented So I decided, we need a better one. Meet tussi tussi is a TUS 1.0.0 resumable upload server for Python. ASGI-native, filesystem storage, no framework lock-in. My USP: no database required, no separate daemon, and total thread/process/worker safety.…