Surge — Blazing-Fast TUI Download Manager Built in Go

Introduction

Surge is a terminal-based download manager written in Go that maximizes download speeds through multi-connection splitting and provides a polished TUI for managing active transfers. Built for power users who prefer the terminal, it handles large file downloads with resume support and progress tracking.

What Surge Does

• Downloads files using multiple parallel connections for faster speeds
• Provides a responsive terminal UI showing progress, speed, and ETA for each transfer
• Supports resumable downloads that survive interruptions and restarts
• Manages download queues with configurable concurrency limits
• Handles HTTP, HTTPS, and FTP protocols for broad compatibility

Architecture Overview

Surge is built in Go using the Bubble Tea framework for its terminal interface. Downloads are split into segments that are fetched in parallel across multiple connections, then merged into the final file. The download engine manages connection pooling, retry logic, and segment tracking. State is persisted locally so that interrupted downloads can resume from where they left off. The TUI renders real-time progress bars, transfer speeds, and queue status.

Self-Hosting & Configuration

• Install via go install or download a prebuilt binary from GitHub releases
• Configure default download directory and concurrent connection count
• Set bandwidth limits to avoid saturating network connections
• Adjust retry count and timeout settings for unreliable connections
• Configuration is stored in a local YAML file in the user's config directory

Key Features

• Multi-connection download splitting for accelerated transfer speeds
• Interactive terminal UI with real-time progress bars and speed indicators
• Automatic resume for interrupted downloads using HTTP range requests
• Download queue management with priority ordering
• Lightweight single binary with no external dependencies

Comparison with Similar Tools

• aria2 — powerful CLI download utility; Surge adds a modern interactive TUI
• wget — standard single-connection downloader; Surge uses parallel connections for faster speeds
• curl — versatile transfer tool; Surge specializes in download management with queue support
• axel — lightweight download accelerator; Surge provides a richer TUI experience with Bubble Tea

FAQ

Q: Does Surge support torrent downloads? A: No, Surge focuses on HTTP, HTTPS, and FTP downloads. For torrents, use a dedicated client.

Q: Can I run Surge in headless mode without the TUI? A: Yes, you can pass a URL directly as an argument for a non-interactive download.

Q: How many parallel connections does it use by default? A: The default connection count is configurable. Typically 4-8 connections per download provides optimal speed without excessive server load.

Q: Does it support authentication for protected downloads? A: Yes, HTTP basic authentication and custom headers can be specified for authenticated endpoints.

Sources

• https://github.com/SurgeDM/Surge