Backend — Rust
axumrusqliteargon2migrations- One binary, a SQLite store with migrations in code
- Every data route filters by the signed-in user
- The sign-in code is stored hashed, never in clear text
- Caching and headers in a single middleware layer
Case file · Own app · fitness
Teretana
Gym tracker
My own training tracker, not a fork: Rust axum and rusqlite in a single binary, with a frontend of plain ES modules and no build step. A catalogue of 1324 exercises with animated loops and a muscle map, sessions with sets and weights, history per muscle group and a plan generator. Sign-in uses an email code and Cloudflare Turnstile, with data separated per user.
What it does
01 / 09- A catalogue of 1324 exercises with animations, imported by script, muscle groups in Serbian
- GIFs converted to ping-pong MP4: six to ten times smaller, and the loop is smooth
- A muscle map as SVG, with history, best weights and a "not tried yet" state
- Sessions, sets and reps, computed volume and a calorie estimate
- A plan generator: the three most-trained groups plus new ones to fill in
- Sign-in: email code (six digits, ten minutes, attempt limit) and Turnstile
- Per-user data isolation on every query, 30-day sessions
- A frontend with no build step, View Transitions, and only content animated
- Cache rules per type: API no-store, HTML revalidated, media immutable
Layers
02 / 03Interface
ES modulesView TransitionsSVG- A set of tabs: Today, Exercises, Muscles, Plan, Profile
- Only the content animates, the fixed tab bar never jumps
- The muscle map is generated from geometry, not hand-drawn
- Details: a sheet that does not jump, stagger capped at ten elements
Data and media
PythonffmpegSQLite- Catalogue and media imported once by script, repeatable
- HD video goes through faststart, otherwise the browser waits for the whole file
- Video matched to an exercise by exact name only, no guessing
- Calories are an estimate: MET per set, duration clamped
Technologies
03 / 03Languages RustJavaScriptPythonSQL 04
Frameworks & tools axumrusqliteargon2TurnstileView Transitionsffmpeg 06
Infrastructure nplpa-vpssystemdCaddy 03