GoRelink – Go URL Shortener

A simple URL shortener written in Go with both a console interface and a basic HTML web UI.

Features

• Accepts a URL from the terminal or via web form.
• Automatically prepends https:// if missing.
• Generates a random short identifier.
• Stores short → original URL mappings in memory.
• Exposes an /api/shorten endpoint for web clients.
• Redirects users from short URLs using /gorelink/{id}.
• Includes a basic HTML frontend with a logo.

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Usage (Web UI)

1. Open index.html in your browser or host it via Go.
2. Enter a URL into the form.
3. The shortened link will appear below the form.
4. It uses POST /api/shorten to generate short URLs.

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API

POST /api/shorten

Request Body:

{
  "url": "https://example.com"
}

Response:

{
  "shortURL": "http://localhost:8080/gorelink/XyZ123"
}

CORS is enabled for local testing.

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Storage

Currently uses in-memory map. Data will be lost when the program stops.

Possible Improvements

• Store links in a file or database.
• Add a web form for submitting URLs.
• Generate collision-free short IDs.
• Support expiration dates for short links.

Testing

This project includes unit tests for the HTTP handlers and storage logic.

To run tests, use:

go test ./...

This will run all tests and show verbose output.

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Run Instructions

git clone https://github.com/DaniilPolskov/GoRelink.git
cd GoRelink
go run main.go