https://github.com/knightchaser/urlshortener

A simple URL shortener inspired from <System Design Interview>
https://github.com/knightchaser/urlshortener

Last synced: about 2 months ago
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A simple URL shortener inspired from <System Design Interview>

• Host: GitHub
• URL: https://github.com/knightchaser/urlshortener
• Owner: KnightChaser
• Created: 2024-03-02T15:40:34.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2024-03-03T08:37:22.000Z (over 2 years ago)
• Last Synced: 2025-01-28T16:46:17.986Z (over 1 year ago)
• Language: JavaScript
• Size: 149 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# urlshortener

![Express.js](https://img.shields.io/badge/express.js-%23404d59.svg?style=for-the-badge&logo=express&logoColor=%2361DAFB)

![MySQL](https://img.shields.io/badge/mysql-%2300f.svg?style=for-the-badge&logo=mysql&logoColor=white)

### A very very simple URL shortener inspired from ``

### Appearances

![1](./readme_pic/1.png)

![2](./readme_pic/2.png)

### Mechanism

1. Do SHA256 hash URL

2. Encode hashed URL to BASE62 encoding

3. Cut the first 10 characters. The duplication probability is **1/62^10** = 1/839,299,365,868,340,224. The url will be like `W99EdQi0CY`

4. Save that to the database and return the shortened URL to the user after appending the site domain like `knig.ht/W99EdQi0CY`. (Refer to `.env` file.)

It's a very simple and rough implementation, I just built it in only 3 hours. Of course, not for real production!