(PowerShell) 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 .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

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

$http = New-Object 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 -ne $true) {
    $($http.LastErrorText)
    exit
}

$("Response Status Code: " + $http.LastStatus)

$json = New-Object Chilkat.JsonObject
$json.Load($jsonResp)
$json.EmitCompact = $false
$($json.Emit())

if ($http.LastStatus -ne 200) {
    $("Failed.")
    exit
}

# 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 = $json.SizeOfArray("Question")
while ($i -lt $count_i) {
    $json.I = $i
    $name = $json.StringOf("Question[i].name")
    $type = $json.IntOf("Question[i].type")
    $i = $i + 1
}

$i = 0
$count_i = $json.SizeOfArray("Answer")
# The domain name resolves to 1 or more IP addresses..
while ($i -lt $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")

    $("IP Address: " + $ipAddr)
    $i = $i + 1
}