HTTPS request with NodeJS TLS Socket

httpsSocketRequest.js

#!/usr/bin/env node

import tls from 'node:tls'

const host = 'one.one.one.one' // Cloudflare DNS
const port = 443
const timeout = 5_000
const path = '/dns/'

const request = trim(`
  HEAD ${path} HTTP/1.1
  Host: ${host}
  Connection: close
`) + '\n\n'

let reads = 0
console.log(`connecting to https://${host}:${port}...`)
const socket = getSocket()
  .on('ready', () => {
    socket.write(request, () => {
      console.log(`——  HTTPS Request  ——\n${request}`)
    })
  })
  .on('data', data => {
    if (!reads++) {
      console.log(`——  HTTPS Response  ——`)
    }
    console.log(data.toString())
  })
  .on('end', () => console.log('——'))


/*  Returns <TLSSocket> with error handling
 *
 *  <tls.TLSSocket>           https://nodejs.org/api/tls.html#class-tlstlssocket
 *    ∟ <net.Socket>          https://nodejs.org/api/net.html#class-netsocket
 *        ∟ <stream.Duplex>   https://nodejs.org/api/stream.html#class-streamduplex
 */
function getSocket() {
  const socket = tls.connect({ host, port })
    .setTimeout(timeout)
    .on('error', err => {
      socket.once('close', () => {
        console.error(err)
        throw err
      })
    })
    .on('timeout', () => {
      const error = socket.connecting
        ? Error('connection timeout')
        : Error('inactivity timeout')
      socket.destroy(error)
    })
    .on('close', isError => {
      console.log('socket closed:', { isError })
    })
  return socket
}


// trims whitespace from multiline JS template strings
function trim(str) {
  return str
    .replace(/(^\s*|\s*$)/g, '')  // start/end lines
    .replace(/\s*\n\s*/g, '\n')   // leading/trailing whitespace
}

NodeJS test

$ node -v

v22.6.0

$ node httpsSocketRequest.js 

——  HTTPS Request  ——
HEAD /dns/ HTTP/1.1
Host: one.one.one.one
Connection: close


——  HTTPS Response  ——
HTTP/1.1 200 OK
Date: Fri, 20 Jun 2025 00:00:00 GMT
Content-Type: text/html; charset=utf-8
Connection: close
Access-Control-Allow-Origin: *
Cache-Control: public, max-age=0, must-revalidate
ETag: "e3b0b55949321bee09e380eb849f90fd"
Vary: Accept-Encoding
referrer-policy: strict-origin-when-cross-origin
x-content-type-options: nosniff
x-frame-options: DENY
Server: cloudflare
alt-svc: h3=":443"; ma=86400


——
socket closed: { isError: false }

Bun test

$ bun -v

1.2.16

$ bun httpsSocketRequest.js 

——  HTTPS Request  ——
HEAD /dns/ HTTP/1.1
Host: one.one.one.one
Connection: close


——  HTTPS Response  ——
HTTP/1.1 200 OK
Date: Fri, 20 Jun 2025 00:00:00 GMT
Content-Type: text/html; charset=utf-8
Connection: closed
...