HonoJS Redirector - https://byt3bl33d3r.substack.com/publish/post/66929654

index.ts

import { Hono } from "hono";

const app = new Hono()

app.get('/', async (c) => {
    const bad_user_agent_array = ['curl', 'httpie']

    const user_agent = c.req.header('User-Agent')
    const ip = c.req.header("CF-Connecting-IP")

    console.log(user_agent)
    //Object.keys(c.req.cf)
    //  .forEach( key => console.log(`${key}: ${c.req.cf[key]}`))

    const user_agent_test = bad_user_agent_array.some( x => {
        return user_agent.toLowerCase().startsWith(x.toLowerCase())
    })
    const asn_org_test = c.req.cf.asOrganization.starsWith("Microsoft")

    const detected = user_agent_test || asn_org_test

    console.log(detected)
    switch(detected){
        case true:
            return c.body('nope', 404)
        case false:
            return c.body('yes', 200)
    }

})