(VBScript) Cloudfare DNS over HTTPS

Cloudflare offers a DNS over HTTPS resolver at: https://cloudflare-dns.com/dns-query

This example demonstrates how to do a DNS lookup for a domain using Cloudfare's HTTPS resolver.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Http")
set http = CreateObject("Chilkat.Http")

' Send the following CURL request:   curl -H 'accept: application/dns-json' 'https://cloudflare-dns.com/dns-query?name=chilkat.io&type=A'

http.Accept = "application/dns-json"

url = "https://cloudflare-dns.com/dns-query?name=chilkat.io&type=A"

jsonResp = http.QuickGetStr(url)
If (http.LastMethodSuccess <> 1) Then
    outFile.WriteLine(http.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine("Response Status Code: " & http.LastStatus)

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.JsonObject")
set json = CreateObject("Chilkat.JsonObject")
success = json.Load(jsonResp)
json.EmitCompact = 0
outFile.WriteLine(json.Emit())

If (http.LastStatus <> 200) Then
    outFile.WriteLine("Failed.")
    WScript.Quit
End If

' Sample output...
' (See the parsing code below..)
' 

' {
'   "Status": 0,
'   "TC": false,
'   "RD": true,
'   "RA": true,
'   "AD": false,
'   "CD": false,
'   "Question": [
'     {
'       "name": "chilkat.io.",
'       "type": 1
'     }
'   ],
'   "Answer": [
'     {
'       "name": "chilkat.io.",
'       "type": 1,
'       "TTL": 900,
'       "data": "52.25.83.238"
'     }
'   ]
' }

' Use this online tool to generate parsing code from sample JSON: 
' Generate Parsing Code from JSON

Status = json.IntOf("Status")
TC = json.BoolOf("TC")
RD = json.BoolOf("RD")
RA = json.BoolOf("RA")
AD = json.BoolOf("AD")
CD = json.BoolOf("CD")
i = 0
count_i = json.SizeOfArray("Question")
Do While i < count_i
    json.I = i
    name = json.StringOf("Question[i].name")
    type = json.IntOf("Question[i].type")
    i = i + 1
Loop
i = 0
count_i = json.SizeOfArray("Answer")
' The domain name resolves to 1 or more IP addresses..
Do While i < count_i
    json.I = i
    name = json.StringOf("Answer[i].name")
    type = json.IntOf("Answer[i].type")
    TTL = json.IntOf("Answer[i].TTL")
    ipAddr = json.StringOf("Answer[i].data")

    outFile.WriteLine("IP Address: " & ipAddr)
    i = i + 1
Loop

outFile.Close