@geekbb: A multi-protocol downloader with a Rust engine and Flutter UI, supporting HTTP/FTP, BT magnet, eD2K, and HLS/DASH streaming media, positioned as a free and open-source IDM alternative. https://github.com/zerx-lab/Flu…

A Rust engine + Flutter interface multi-protocol downloader, supporting HTTP/FTP, BitTorrent magnets, eD2K, and HLS/DASH streaming. Positioned as a free and open-source IDM alternative. https://t.co/ZzRm9lIVTM https://t.co/yNsXmzJCd1 — # zerx-lab/FluxDown Source: https://github.com/zerx-lab/FluxDown # FluxDown ### Downloads, Supercharged. A blazing fast, multi-protocol download manager — the free & open-source IDM alternative. Latest Release (https://github.com/zerx-lab/FluxDown/releases/latest) Downloads (https://github.com/zerx-lab/FluxDown/releases) License: AGPL-3.0 Platform Rust Flutter MCP Server (https://glama.ai/mcp/servers/zerx-lab/FluxDown) Website (https://fluxdown.zerx.dev) · Download (https://fluxdown.zerx.dev/#download) · Changelog (https://fluxdown.zerx.dev/changelog) · FAQ (https://fluxdown.zerx.dev/faq) · Feedback (https://fluxdown.zerx.dev/feedback) English | 简体中文 — ## Highlights - Up to 10x faster — Rust + Tokio engine with IDM-style dynamic segmentation - Multi-protocol — HTTP/HTTPS, FTP, BitTorrent, eD2K, HLS & DASH streaming - Browser integration — Chrome / Edge / Firefox extension with a 3-layer interception engine - AI-agent ready — built-in MCP (Model Context Protocol) server: let Claude, Cursor & other AI clients manage your downloads - Resume anywhere — full download state persisted in SQLite; survive crashes and reboots - Beautiful UI — light/dark themes, 13 color schemes, responsive three-pane layout - Clean & private — free forever, no ads, no tracking, no account, local-first ## Features | Feature | Description | |—|—| | Rust-Powered Engine | Built on Rust and Tokio with zero-cost abstractions — memory-safe concurrency at maximum throughput | | Smart Segmentation | Segments split dynamically at runtime; idle threads rescue slow segments, just like IDM — but smarter | | Multi-Protocol | Dedicated engines for HTTP/HTTPS, FTP, BitTorrent (DHT/UPnP/magnet), eD2K (server + Kad DHT source finding, MD4 verification), HLS (AES-decrypt) and DASH | | Speed Control | Token-bucket global rate limiting — download in the background without killing your browsing | | Resume Anywhere | Every byte tracked in SQLite with WAL; power loss never costs you progress | | Browser Integration | Three-layer download interception, streaming media sniffing, Alt+Click bypass, right-click send | | MCP Server | Built-in Model Context Protocol endpoint (Streamable HTTP) with 9 tools — AI agents can add, monitor and control downloads | | Beautiful Interface | shadcn-style widgets, IDM-style segment visualization, named queues, system tray | | Clean & Private | Zero ads, zero telemetry lock-in, zero accounts — your data never leaves your machine | ## FluxDown vs. IDM | | FluxDown | IDM | |—|:—:|:—:| | Price | Free forever | $24.95 + renewals | | Open source | Yes (AGPL-3.0) | No | | Platforms | Windows / macOS / Linux / NAS / Android | Windows only | | BitTorrent & magnet | Yes | No | | eD2K / eMule links | Yes | No | | HLS / DASH streaming | Yes | Partial | | Dynamic segmentation | Yes | Yes | | Browser extension | Chrome / Edge / Firefox | Yes | | Ads & tracking | None | — | ## Installation Grab the latest build from GitHub Releases (https://github.com/zerx-lab/FluxDown/releases/latest) or fluxdown.zerx.dev (https://fluxdown.zerx.dev/#download): | Platform | Packages | |—|—| | Windows (x64 / ARM64) | setup.exe installer · portable .zip | | macOS (Intel / Apple Silicon) | .dmg · portable .tar.gz | | Linux (x64) | .AppImage · .deb · Arch .pkg.tar.zst · portable .tar.gz | | Android (arm64-v8a / armeabi-v7a / x86_64) | per-ABI .apk · universal .apk | | NAS / Server (headless, x64 / ARM64) | Docker (https://ghcr.io/zerx-lab/fluxdown-server) · Synology DSM 6/7 .spk · QNAP .qpkg · OpenWrt .ipk · Unraid CA template · CasaOS / ZimaOS app store | ### Browser Extension Install the extension so FluxDown takes over browser downloads automatically: ## MCP Server (Model Context Protocol) FluxDown ships a built-in MCP server so AI agents (Claude Desktop, Cursor, Cline, …) can manage downloads via the Model Context Protocol (https://modelcontextprotocol.io). It speaks Streamable HTTP (JSON-RPC 2.0 over a single POST /mcp) on the local API port — no extra process needed. - Endpoint: http://127.0.0.1:17800/mcp (local-only by default) - Auth: Bearer token (Authorization: Bearer <token> or X-FluxDown-Token), shared with the management API - Enable: Settings → API Service → toggle MCP endpoint (a token is generated automatically); the headless server enables it by default ### Tools (9) | Tool | Description | |—|—| | download_add | Create a download task (HTTP/HTTPS, FTP, magnet, BitTorrent) | | download_list | List tasks with progress/speed/status, optional status filter | | download_get | Get a single task by ID | | download_pause / download_resume | Pause / resume one task | | download_pause_all / download_resume_all | Pause / resume all tasks | | download_remove | Remove a task, optionally deleting downloaded files | | queue_list | List named queues and their configuration | ### Client configuration json { "mcpServers": { "fluxdown": { "url": "http://127.0.0.1:17800/mcp", "headers": { "Authorization": "Bearer <token>" } } } } The MCP layer is implemented in native/api/src/mcp.rs on top of the same ApiHost trait that powers the REST management API and aria2-compatible JSON-RPC. ## Architecture Flutter renders the UI; a zero-FFI Rust engine does the heavy lifting. The two talk through Rinf (https://rinf.cunarist.org) signals, and the browser extension connects via Native Messaging. mermaid flowchart TD EXT["Browser Extension (WXT)"] -->|Native Messaging| NMH["fluxdown_nmh"] NMH -->|Named Pipe / Unix socket| HUB UI["Flutter UI (shadcn_ui)"] <-->|Rinf signals| HUB["hub — FFI adapter"] HUB --> ENGINE["fluxdown_engine"] ENGINE --> HTTP["HTTP/HTTPS"] ENGINE --> FTP["FTP"] ENGINE --> BT["BitTorrent"] ENGINE --> ED2K["eD2K"] ENGINE --> HLS["HLS / DASH"] ENGINE --> DB[("SQLite)"] | Layer | Tech | Path | |—|—|—| | UI | Flutter + shadcn_ui | lib/ | | FFI bridge | Rinf (Dart ↔ Rust signals) | native/hub/ | | Download engine | Rust + Tokio (zero FFI deps) | native/engine/ | | Browser extension | WXT + TypeScript | fluxDown/ | | Website | Astro + React | website/ | ## Building from Source Prerequisites: Flutter SDK (https://docs.flutter.dev/get-started/install) · Rust toolchain (https://www.rust-lang.org/tools/install) · Rinf CLI (https://rinf.cunarist.org) shell # Check your environment rustc --version flutter doctor # Install the Rinf CLI (once) cargo install rinf_cli # Fetch dependencies & generate Dart bindings flutter pub get rinf gen # Run in debug mode flutter run # Build a release flutter build windows --release # or: macos / linux Linux system dependencies shell # Debian/Ubuntu sudo apt-get install cmake ninja-build clang pkg-config \ libgtk-3-dev libayatana-appindicator3-dev libnotify-dev libsecret-1-dev patchelf zstd # Arch Linux sudo pacman -S cmake ninja clang pkgconf gtk3 libayatana-appindicator libnotify libsecret patchelf zstd The NMH relay binary (fluxdown_nmh) is built automatically by CMake during flutter build. Distribution packages (AppImage / deb / Arch / portable) are produced by CI on every tag. Running tests shell flutter test # Dart tests cargo test -p fluxdown_engine # Rust engine tests cargo test -p hub # FFI adapter tests ## Contributing & Community - Bug reports / feature requests — GitHub Issues (https://github.com/zerx-lab/FluxDown/issues) or the in-app feedback dialog - QQ Group — 832143651 (https://fluxdown.zerx.dev/qq-group) Pull requests are welcome! Before submitting, please make sure: shell cargo fmt --check && cargo clippy -- -D warnings # Rust flutter analyze # Dart ## License Distributed under the GNU Affero General Public License v3.0. If FluxDown saves you time, consider giving it a Star — it helps more people discover the project. Made by zerx-lab (https://github.com/zerx-lab)