octoturge
d0a17ee50e
Removed adapters/ (rumqttc MQTT, suppaftp FTPS, reqwest HTTP), plate_changer/ (tokio-serial), discovery/, and cache.rs (rusqlite) — src/printer/ already covers 'talk to a printer' as simple stubs, so keeping a second, more complex version alongside it was redundant. main.rs goes from 6 concurrent tasks to 2 (uplink + go2rtc). uplink/ drops channels, jitter, and Send-bound futures. Verified with cargo build + cargo run --example printer_polymorphism.
continuum-proxy
Edge gateway daemon for the Continuum print farm platform. Runs on a Linux
SBC on-site, talks to printers over the LAN, and keeps a connection to the
cloud control plane (continuum-backend).
This is a learning-stage boilerplate
This repo is deliberately minimal right now — real printer protocol clients
(Bambu MQTT+FTPS, PrusaLink REST, Klipper/Moonraker WebSocket) are not
implemented yet. Each vendor is a stub that just prints what it would do
(src/printer/bambu.rs, prusa.rs, klipper.rs). The idea is to learn
Rust's polymorphism pattern (trait + enum, since Rust has no class
inheritance) on something simple before adding real networking on top.
Getting started
cp .env.example .env
cargo run # the daemon: cloud uplink + go2rtc watchdog
cargo run --example printer_polymorphism # standalone demo, no network/env needed
Structure
src/
main.rs Runs the uplink and the go2rtc watchdog side by side
config.rs Loads settings from environment variables
uplink/ WebSocket client to continuum-backend: connect, heartbeat, reconnect on drop
printer/ Printer trait + PrinterBase + PrinterHandle enum + one stub per vendor
go2rtc.rs Restarts the go2rtc camera-restreaming process if it dies
examples/
printer_polymorphism.rs Runs all three printer stubs through one `connect()` call site
src/printer/ is where the "inheritance" question lives — see that
module's doc comment for the trait+enum pattern this project uses instead
of class inheritance, and run the example above to see it work.
What's not here yet (on purpose)
- Real MQTT/FTPS/HTTP/WebSocket printer clients —
src/printer/*.rshas aprintln!where each of these will go. - Local SQLite buffering for telemetry across connectivity gaps.
- LAN printer discovery (SSDP/mDNS).
- The mechanical plate-changer interface (serial/GPIO).
Add these back in one at a time as you get comfortable with the Rust underneath them — each is its own small lesson (async I/O, a new crate's API, error handling for a real protocol) rather than something to absorb all at once.