From 0e265ed85941f4bc2355206aa841d8e68aa80f12 Mon Sep 17 00:00:00 2001
From: Subhodip Ghosh <suvodip@siliconpin.com>
Date: Tue, 27 Jan 2026 13:48:57 +0530
Subject: [PATCH] add CORS

---
 .hta_slug/dns-tools-get-a-record.php | 66 +++++++++++++++++++++-------
 1 file changed, 51 insertions(+), 15 deletions(-)

diff --git a/.hta_slug/dns-tools-get-a-record.php b/.hta_slug/dns-tools-get-a-record.php
index c703c1d..5594825 100644
--- a/.hta_slug/dns-tools-get-a-record.php
+++ b/.hta_slug/dns-tools-get-a-record.php
@@ -1,10 +1,6 @@
 <?php
 require_once __DIR__ . '/../.hta_config/conf.php';
 
-
-// -------------------------------
-// Apply headers + CORS
-// -------------------------------
 applyApiHeaders($API_HEADERS);
 handleCorsPreflight();
 
@@ -36,11 +32,9 @@ if (!is_array($data)) {
 }
 
 // -------------------------------
-// Extract + normalize domain
+// Normalize domain
 // -------------------------------
 $domain = trim($data['domain'] ?? '');
-
-// Remove protocol if user sends URL
 $domain = preg_replace('#^https?://#', '', $domain);
 $domain = preg_replace('#/.*$#', '', $domain);
 
@@ -65,15 +59,54 @@ if (!$domain || !validateDomain($domain)) {
 }
 
 // -------------------------------
-// DNS A record lookup
+// DNS lookup with timing
 // -------------------------------
+$startTime = microtime(true);
 $records = dns_get_record($domain, DNS_A);
-$ips = [];
+$lookupTimeMs = round((microtime(true) - $startTime) * 1000, 2);
+
+// -------------------------------
+// Resolver info
+// -------------------------------
+$resolver = 'system';
+$resolvConf = '/etc/resolv.conf';
+if (is_readable($resolvConf)) {
+    $content = file_get_contents($resolvConf);
+    if (preg_match('/nameserver\s+([^\s]+)/', $content, $m)) {
+        $resolver = $m[1];
+    }
+}
+
+// -------------------------------
+// Provider detection (heuristic)
+// -------------------------------
+function detectProvider(string $ip): string
+{
+    if (preg_match('/^(104\.|172\.6[4-7]\.)/', $ip)) {
+        return 'Cloudflare';
+    }
+    if (preg_match('/^(13\.|15\.|52\.|54\.)/', $ip)) {
+        return 'AWS';
+    }
+    if (preg_match('/^(34\.|35\.)/', $ip)) {
+        return 'Google Cloud';
+    }
+    return 'Unknown';
+}
+
+// -------------------------------
+// Build records
+// -------------------------------
+$result = [];
 
 if ($records !== false) {
     foreach ($records as $record) {
         if (!empty($record['ip'])) {
-            $ips[] = $record['ip'];
+            $result[] = [
+                'ip'       => $record['ip'],
+                'ttl'      => $record['ttl'] ?? null,
+                'provider' => detectProvider($record['ip'])
+            ];
         }
     }
 }
@@ -81,18 +114,21 @@ if ($records !== false) {
 // -------------------------------
 // Response
 // -------------------------------
-if (empty($ips)) {
+if (empty($result)) {
     echo json_encode([
         'success' => false,
         'domain'  => $domain,
         'message' => 'No A records found',
-        'ips'     => []
+        'records' => []
     ]);
     exit;
 }
 
 echo json_encode([
-    'success' => true,
-    'domain'  => $domain,
-    'ips'     => array_values(array_unique($ips))
+    'success'         => true,
+    'domain'          => $domain,
+    'record_count'    => count($result),
+    'lookup_time_ms'  => $lookupTimeMs,
+    'resolver'        => $resolver,
+    'records'         => $result
 ]);