Redirect to package page on archlinux.org

portal.js

addEventListener('fetch', event => {
  event.respondWith(handleRequest(event.request))
})
/**
 * Respond with hello worker text
 * @param {Request} request
 */
async function handleRequest(request) {
  const url = new URL(request.url)
  const path = url.pathname

  // process favicon.ico requests
  if (path === '/favicon.ico') {
    return new Response(null, {status: 204})
  }

  if (path.length === 0 || path.endsWith('/')) {
    return new Response('Hello worker!')
  }

  const package_name = path.substring(1)
  const response = await fetch(`https://archlinux.org/packages/search/json/?name=${package_name}`)
    .then(response => response.json())
    .then(json => {
      const pkg = json.results[0]
      const repo = pkg.repo
      const arch = pkg.arch
      const package_url = `https://archlinux.org/packages/${repo}/${arch}/${package_name}/`
      console.log(`${package_name} is available at ${package_url}`)

      // redirect to package page
      return new Response(null, {
        status: 302,
        headers: {
          'Location': package_url
        }
      })
    })
    .catch(error => {
      return new Response(error.message, { status: 500 })
    })

  return response
}