Perl

Cloudfare DNS over HTTPS

See more Cloudfare Examples

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.

Perl

use chilkat();

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

$http = chilkat::CkHttp->new();

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

$http->put_Accept("application/dns-json");

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

$jsonResp = $http->quickGetStr($url);
if ($http->get_LastMethodSuccess() != 1) {
    print $http->lastErrorText() . "\r\n";
    exit;
}

print "Response Status Code: " . $http->get_LastStatus() . "\r\n";

$json = chilkat::CkJsonObject->new();
$json->Load($jsonResp);
$json->put_EmitCompact(0);
print $json->emit() . "\r\n";

if ($http->get_LastStatus() != 200) {
    print "Failed." . "\r\n";
    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 < $count_i) {
    $json->put_I($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 < $count_i) {
    $json->put_I($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");

    print "IP Address: " . $ipAddr . "\r\n";
    $i = $i + 1;
}