mirror of
https://github.com/Felitendo/spotifast.git
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Carmine Paolino
8193825ef2
A librespot, spotifyd, or hardware receiver only enters Spotify's device list once it has an account, so a speaker plainly visible in the official client is missing from the Web API. Fastpotify now browses mDNS for _spotify-connect._tcp when the device picker opens, lists what it finds, and on request hands over the reusable credential librespot already stores: wrapped in a key derived from the receiver's device id, then encrypted to a key both sides derive from a Diffie-Hellman exchange with the key that receiver published. The receiver logs in, appears in the ordinary device list, and playback moves there. Verified against a real librespot 0.8 receiver on the LAN. The crate is now also a library so diagnostics can reach these internals; examples/connect_probe.rs discovers and connects from the terminal.
188 lines
8.1 KiB
Markdown
188 lines
8.1 KiB
Markdown
# Fastpotify
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**Spotify, native and fast.** A lightweight Spotify client written in Rust with
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[egui](https://github.com/emilk/egui), playing music through
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[librespot](https://github.com/librespot-org/librespot). It runs on Linux,
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macOS, and Windows, starts in well under a second, and stays small while it
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runs. There is no browser engine anywhere in the process.
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Fastpotify follows in the footsteps of
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[Omarchy Spotify](https://github.com/stappmus/Omarchy-Spotify) and
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[spotify-tui](https://github.com/Rigellute/spotify-tui): the familiar Spotify
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layout, the whole library, and a Spotify Connect receiver on your computer,
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as one ordinary desktop application rather than a shell plugin.
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**Documentation:** [fastpotify.rocks](https://fastpotify.rocks/): what it is, getting started, everyday use, and how it connects to Spotify.
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## What it does
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- **Plays music on this computer.** Fastpotify is a Spotify Connect device.
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Pick it from your phone, or press play here. Gapless, up to 320 kbps, with
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optional volume normalisation and an on-disk audio cache.
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- **Controls every other device.** Move playback to a speaker, a phone, or
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another computer from the device picker, and keep controlling it: play,
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pause, skip, seek, shuffle, repeat, volume.
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- **Finds speakers on your network.** A librespot, spotifyd, or hardware
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receiver waiting on the LAN is invisible to Spotify's API until it has an
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account. Fastpotify discovers those over mDNS and connects them for you,
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after which they behave like any other Spotify Connect device.
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- **Your whole library.** Playlists, Liked Songs, saved albums, followed
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artists, podcasts, and saved episodes, filterable in the sidebar and as
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full pages.
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- **Search** across songs, artists, albums, playlists, podcasts, and episodes,
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with a top result and per-type views.
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- **Home** with Made for you, Recently played, your top artists and songs, and
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recommendations.
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- **Artist pages** with popular songs, a filterable discography, and related
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artists. **Album**, **playlist**, and **podcast** pages with everything
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playable from any row.
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- **Playlists you own** can be created, renamed, described, reordered, and
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edited: add from any row's menu, remove from the playlist page.
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- **Queue** as a side panel or a page; add anything to it from a row menu.
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- **Album-art colour.** Pages and the player bar take a tint from the cover
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of what you are looking at or listening to. Turn it off in Settings.
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- **Light and dark**, or follow the system.
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- **Keyboard-first.** Every common action has a shortcut (`Ctrl+/` lists
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them).
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- **Keeps playing when you close the window.** The window closes for real,
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the music and the process stay in the system tray (Linux status notifier),
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and clicking the tray, or your desktop's media controls, brings a window
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back. No compositor-specific tricks, so it behaves the same on any
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desktop. Quit from the tray menu or `Ctrl+Q`; turn the behaviour off in
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Settings if you prefer close-to-quit.
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- **Honest about the network.** Pages show spinners while they load, a
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quiet indicator appears in the top bar whenever the app is talking to
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Spotify for more than a moment, and if Spotify asks the app to back off
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you see that it is waiting, instead of an unexplained pause.
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- **One instance.** Launching it again surfaces the window that is already
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open instead of starting a rival copy, on every platform.
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- **Desktop integration.** MPRIS on Linux, so media keys, the shell, and
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`playerctl` see Fastpotify like any other player.
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## Install
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On Arch Linux, Fastpotify is in the AUR:
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```bash
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yay -S fastpotify # the released build
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yay -S fastpotify-git # built from the latest commit
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```
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Everywhere else it is a single binary. Build it with a stable Rust toolchain
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(1.95 or newer):
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```bash
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cargo install --path .
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```
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On Linux you also need the development packages for ALSA, PulseAudio (which
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covers PipeWire), and the usual windowing libraries, for example on Arch:
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```bash
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sudo pacman -S --needed alsa-lib libpulse libxkbcommon wayland
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```
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and on Debian or Ubuntu:
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```bash
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sudo apt install libasound2-dev libpulse-dev libxkbcommon-dev libwayland-dev
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```
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A desktop entry is provided in `packaging/applications/fastpotify.desktop`.
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## Sign in
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Press **Sign in with Spotify**. Your browser opens Spotify's own consent
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page (Authorization Code with PKCE); Fastpotify never sees your password.
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When Spotify redirects back to the app, your library, search, and control
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of other devices work immediately. The refresh token is stored in the
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platform's state directory (`~/.local/state/fastpotify` on Linux), so the
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browser is needed once per machine.
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Playing music **on this computer** is one more one-time browser approval.
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Spotify treats streaming as a separate grant for its own client identity,
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which is what librespot plays with. Take it from the device menu ("Play
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here, set up once") or Settings; it needs Spotify Premium, and librespot
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stores a reusable credential so it also never asks again. Browsing and
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remote control work on any account without this step.
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By default the Web API uses the shared public application also used by
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spotify-player, ncspot, and Omarchy Spotify. If you hit rate limits you can
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register your own (free) Spotify application and paste its Client ID in
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Settings → Account.
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## Keyboard shortcuts
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| Shortcut | What it does |
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| --- | --- |
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| `Space` | Play or pause |
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| `Ctrl+←` / `Ctrl+→` | Previous or next |
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| `Shift+←` / `Shift+→` | Seek 10 seconds |
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| `Ctrl+↑` / `Ctrl+↓` | Volume |
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| `M` | Mute |
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| `S` / `R` | Shuffle / cycle repeat |
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| `Q` | Queue panel |
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| `Ctrl+F` or `/` | Search |
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| `Alt+←` / `Alt+→` | Back or forward |
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| `Ctrl+H` / `Ctrl+L` | Home / Liked Songs |
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| `Ctrl+Shift+A` / `Ctrl+Shift+B` | Playing artist / album |
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| `Ctrl+,` | Settings |
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| `Ctrl+/` | All shortcuts |
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| `Ctrl+Q` | Quit |
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On macOS, `Cmd` replaces `Ctrl`.
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## Settings
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Everything lives in one readable JSON file (`~/.config/fastpotify/settings.json`
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on Linux): the Connect device name, bitrate, normalisation, autoplay, gapless
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playback, the audio backend (PulseAudio/PipeWire or ALSA on Linux), audio
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cache size, theme, and whether pages take colour from artwork. Playback
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settings apply when you press **Apply and restart playback**.
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Caches (audio, artwork) live under the cache directory and can be deleted at
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any time without signing you out.
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## How it is built
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- `src/player.rs`: the librespot session, player, mixer, and Spirc (Spotify
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Connect) wrapped into one engine that folds player events into a state
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snapshot for the interface.
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- `src/api/`: a small Web API client with bounded concurrency,
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`Retry-After` handling, and automatic fallback between the 2026 endpoint
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shapes (`/me/library`, `/playlists/{id}/items`) and the classic ones.
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- `src/backend.rs`: a tokio runtime on its own thread; the interface talks to
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it through channels and is woken with `request_repaint`, so the app is idle
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when nothing happens.
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- `src/images.rs`: album art as an egui bytes loader with a disk cache and
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time-based eviction, plus the accent-colour extraction.
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- `src/app.rs`, `src/model.rs`, `src/ui/`: state, navigation, and the views.
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Views collect `Action`s while drawing and the app applies them afterwards.
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- `src/mpris.rs`: Linux media controls on a dedicated thread.
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Fastpotify pins its Rust toolchain in `rust-toolchain.toml`; `cargo test`
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covers the API models, the endpoint fallbacks, PKCE, the player state
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machine, and a headless render of every page, panel, and dialog.
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To look at the interface without a Spotify account, build with the `demo`
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feature and start it with sample data:
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```bash
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cargo run --features demo -- --demo --demo-page playlist:pl1 --demo-show queue
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```
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Demo mode never contacts Spotify and never writes settings.
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## Acknowledgements
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Fastpotify stands on [librespot](https://github.com/librespot-org/librespot),
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[egui](https://github.com/emilk/egui), the [Inter](https://rsms.me/inter/)
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typeface (OFL), and [Lucide](https://lucide.dev) icons (ISC).
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Fastpotify is an independent project and is not affiliated with Spotify.
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Spotify is a trademark of Spotify AB.
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Licensed under the [MIT License](LICENSE).
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