Uplink Cloudflare Workers

workers.js

addEventListener('fetch', event =>
  event.respondWith(handleRequest(event.request))
)

const sitemapUrl = "https://uplink-files.s3.eu-central-1.amazonaws.com/sitemap.xml"
const mediumBlogPostPaths = [
  '/announcing-our-cooperation-with-expath-to-help-freelancers-get-started-in-germany-49edbd765992',
  '/why-you-should-work-freelance-as-a-software-developer-in-germany-52de81082f6f',
  '/why-are-many-it-recruiters-technically-completely-incompetent-e924f559ed0e',
  '/announcing-our-new-partner-exali-5c9acfb34e1c',
  '/debitoor-is-our-newest-partner-82883f67630f',
  '/joining-forces-with-christa-weidner-6a234d97fb5a',
  '/announcing-uplinks-first-partner-kontist-2484d587528e',
  '/introducing-the-uplink-referral-program-72c3db1c8a8d',
  '/lets-move-to-slack-86558368e6d8',
  '/whats-in-a-pitch-cc80cefb7cb8',
  '/our-new-pricing-4e088d7a90b4'
]

async function handleRequest(request) {
  let url = new URL(request.url)

  if (url.pathname === '/sitemap.xml') {
    return fetch(sitemapUrl, request)
  } else if ((url.hostname === 'uplink.tech') && (url.pathname.startsWith('/knowledge-base'))) {
    url.hostname = 'uplinkhq.github.io'

    let   response = await fetch(url, request)
    const location = response.headers.get('Location')

    if (location) {
      const locationUrl = new URL(location)

      if (locationUrl.hostname === 'uplinkhq.github.io') {
        locationUrl.hostname = 'uplink.tech'

        response = new Response(response.body, {
          status: response.status,
          statusText: response.statusText,
          headers: response.headers
        })
        response.headers.set('Location', locationUrl)
      }
    }

    return response
  } else if (url.hostname === 'kb.uplink.tech') {
    url.hostname = 'uplink.tech'
    url.pathname = '/knowledge-base' + url.pathname
    return Response.redirect(url, 301)
  } else if ((url.hostname === 'uplink.tech') && (url.pathname.startsWith('/blog'))) {
    url.hostname = 'ghost.uplink.tech'
    return fetch(url, request)
  } else if (url.hostname === 'blog.uplink.tech') {
    if (mediumBlogPostPaths.includes(url.pathname)) {
      url.hostname = 'medium.com'
      url.pathname = '/uplink-it-freelancer-network' + url.pathname
    } else {
      url.hostname = 'uplink.tech'
      url.pathname = '/blog' + url.pathname
    }
    return Response.redirect(url, 301)
  } else {
    return fetch(request)
  }
}