East Lake Short URL System

Based on Cloudflare Workers & Vercel

Notice: I found the test site u.li2niu.com was abused by phishing emails. So I cancelled the deployment. Please deploy the version of your own.

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Try it now: https://cf-url-admin.li2niu.com/

• Username: li2niu
• Password: li2niu

Please don't delete data with many clicks. We believe you won't.

Short URL Examples:

• https://u.li2niu.com/tcK
• https://u.li2niu.com/666 (For 404)

Screenshots

Features

Frontend Admin (Next.js Project deployed on Vercel, source in /fe)

• Login page: get credentials to proceed.
• Shorten page: create short URLs.
• List page: display short URLs in a table.
• History page: view the click history for a specific short URL.

Backend Server (Cloudflare Worker, source in root directory)

• Correctly and swiftly redirect a short URL to its original long URL.
• Monitor click history per link (optional; note that if enabled, it will consume many read/write times for Cloudflare KV. If you are on a paid plan, forget it because of the unlimited read/write times. But keep in mind that KV is designed more for read rather than write, so inconsistency may exist).
• Expiration time supported.
• Password protection supported.
• 404 Not Found fallback page.

Prerequisites

You must have:

1. A Vercel account.
2. A Cloudflare account.
3. A domain (the shorter, the better). If the domain is managed by Cloudflare, later operations will be much easier.

Deployment

Fork this repo and clone it to your local machine. Then start the deployment process.

Frontend Admin

The frontend code is in /fe, which is a Next.js project. Vercel is highly recommended.

If you want google analytics, remember to add the following env NEXT_PUBLIC_GA_MEASUREMENT_ID=< your ga4 key e.g G-xxxxxxxxxx>

NEXT_PUBLIC_GA_MEASUREMENT_ID=G-xxxxxxxxxx

Backend Server

Initialize Cloudflare KV namespace

Fill in the KV namespace ID in wrangler.toml below. It is not necessary to name your namespace LINKS because it is just a global variable exposed to the worker.

[[kv_namespaces]]
binding = "LINKS"
id = "7f0bf9809c464f51871b753cdda2c124" ## Change it to yours

Create a worker service

Add environment variables.

Don't expose your vars in wrangler.toml

USERNAME = "li2niu" # Change it and don't expose it in this file
PASSWORD = "li2niu" # Change it and don't expose it in this file
JWT_SECRET = "li2niu" # Change it and don't expose it in this file
DEFAULT_PAGE = "https://blog.li2niu.com" # Change it
RECORD_CLICKS = true
FE_ADMIN_DOMAIN = "https://cf-url-admin.li2niu.com" # Replace it with your admin domain, important for cross-origin allowlist

Clone your repo to local

git clone yourrepo

Install Wrangler CLI Locally and Log in to Cloudflare

npm install -g wrangler
wrangler login

Deploy

wrangler publish

Create your short URL in the frontend admin. Enjoy!

Notices

Security

Use a long, difficult-to-guess username, password, and JWT secret for security.

Cloudflare Free Plan Limits

Cloudflare free plan has limits for KV, especially write times. Even in a paid plan, the write speed for the same key is limited to 1 time/second, potentially causing inaccuracies in high concurrency. Click history is not recommended for free plan users.

Vercel Limits

Vercel has limits for free users, but it is unlikely to be easily overused.

Support the Project

Credits

• Vercel
• GPT-4
• Cloudflare

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