File Transfer Service

A simple HTTP file transfer service written in Go that allows uploading, downloading, and managing files with optional password protection.

Why

This project was created to address the need for a lightweight, secure file transfer solution that:

• Stores files in a RAM-Disk for enhanced security and performance
• Provides simple password protection for sensitive files
• Runs as a standalone service without complex dependencies
• Offers a straightforward HTTP API for easy integration

Features

• Upload files up to 16GB
• Download files using unique file IDs
• Password protection for sensitive files
• File information retrieval
• Delete uploaded files
• CORS support

API Endpoints

Upload File - POST /

• Multipart form data with file field
• Optional password field for protection
• Returns JSON with filename and file ID

Download File - GET /

• Query params: id (required), password (if protected), show-popup (boolean)
• Returns file as attachment
• Basic auth support for password protected files

Delete File - DELETE /

• Query params: id (required), password (if protected), show-popup (boolean)
• Deletes file and its directory

File Info - GET /info

• Query params: id (required), password (if protected), show-popup (boolean)
• Returns JSON with name, age, MIME type, and size

Setup

1. Requires Go 1.22.5 or later
2. Install dependencies:

go mod download

3. Run the server:

go run .

The service runs on port 4545 and stores files in /var/cache/file-transfer.

Future Features

Planned improvements for future releases:

• Configurable maximum upload file size
• Custom storage path configuration
• Configuration file support for easier deployment and customization
• Configurable password strength requirement
• Custom CORS options
• Configurable port

Security Features

• SHA3-512 password hashing with salt
• Basic authentication support
• Temporary file storage in cache directory