Update file inclusion paths in multiple PHP files: Adjusted paths to use the new backend directory structure, ensuring consistent access to functions and configuration files across the application.

backend/api/dns-lookup.php

@@ -0,0 +1,161 @@
+<?php
+/**
+ * HexaDNS - DNS Lookup API
+ * 
+ * Führt echte DNS-Abfragen durch und gibt die Ergebnisse als JSON zurück.
+ * 
+ * Verwendung: GET /api/dns-lookup.php?domain=example.com
+ */
+
+// CORS Headers für Frontend-Zugriff
+header('Content-Type: application/json; charset=utf-8');
+header('Access-Control-Allow-Origin: *');
+header('Access-Control-Allow-Methods: GET, OPTIONS');
+header('Access-Control-Allow-Headers: Content-Type');
+
+// Preflight request handling
+if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
+    http_response_code(200);
+    exit;
+}
+
+// Nur GET-Anfragen erlauben
+if ($_SERVER['REQUEST_METHOD'] !== 'GET') {
+    http_response_code(405);
+    echo json_encode(['error' => 'Nur GET-Anfragen erlaubt']);
+    exit;
+}
+
+// Domain-Parameter prüfen
+$domain = isset($_GET['domain']) ? trim($_GET['domain']) : '';
+
+if (empty($domain)) {
+    http_response_code(400);
+    echo json_encode(['error' => 'Domain-Parameter fehlt']);
+    exit;
+}
+
+// Domain validieren (einfache Prüfung)
+if (!preg_match('/^[a-zA-Z0-9][a-zA-Z0-9\-\.]*\.[a-zA-Z]{2,}$/', $domain)) {
+    http_response_code(400);
+    echo json_encode(['error' => 'Ungültiges Domain-Format']);
+    exit;
+}
+
+// DNS-Abfrage durchführen
+$startTime = microtime(true);
+$result = performDnsLookup($domain);
+$queryTime = round((microtime(true) - $startTime) * 1000, 2);
+
+// Ergebnis zurückgeben
+echo json_encode([
+    'success' => true,
+    'domain' => $domain,
+    'query_time_ms' => $queryTime,
+    'timestamp' => date('Y-m-d H:i:s'),
+    'records' => $result
+], JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);
+
+/**
+ * Führt DNS-Lookup für verschiedene Record-Typen durch
+ */
+function performDnsLookup(string $domain): array {
+    $records = [
+        'A' => [],
+        'AAAA' => [],
+        'MX' => [],
+        'NS' => [],
+        'TXT' => [],
+        'CNAME' => [],
+        'SOA' => []
+    ];
+    
+    // A-Records (IPv4)
+    $aRecords = @dns_get_record($domain, DNS_A);
+    if ($aRecords) {
+        foreach ($aRecords as $record) {
+            $records['A'][] = [
+                'ip' => $record['ip'],
+                'ttl' => $record['ttl']
+            ];
+        }
+    }
+    
+    // AAAA-Records (IPv6)
+    $aaaaRecords = @dns_get_record($domain, DNS_AAAA);
+    if ($aaaaRecords) {
+        foreach ($aaaaRecords as $record) {
+            $records['AAAA'][] = [
+                'ipv6' => $record['ipv6'],
+                'ttl' => $record['ttl']
+            ];
+        }
+    }
+    
+    // MX-Records (Mail)
+    $mxRecords = @dns_get_record($domain, DNS_MX);
+    if ($mxRecords) {
+        foreach ($mxRecords as $record) {
+            $records['MX'][] = [
+                'target' => $record['target'],
+                'priority' => $record['pri'],
+                'ttl' => $record['ttl']
+            ];
+        }
+        // Nach Priorität sortieren
+        usort($records['MX'], fn($a, $b) => $a['priority'] <=> $b['priority']);
+    }
+    
+    // NS-Records (Nameserver)
+    $nsRecords = @dns_get_record($domain, DNS_NS);
+    if ($nsRecords) {
+        foreach ($nsRecords as $record) {
+            $records['NS'][] = [
+                'target' => $record['target'],
+                'ttl' => $record['ttl']
+            ];
+        }
+    }
+    
+    // TXT-Records
+    $txtRecords = @dns_get_record($domain, DNS_TXT);
+    if ($txtRecords) {
+        foreach ($txtRecords as $record) {
+            $records['TXT'][] = [
+                'txt' => $record['txt'],
+                'ttl' => $record['ttl']
+            ];
+        }
+    }
+    
+    // CNAME-Records
+    $cnameRecords = @dns_get_record($domain, DNS_CNAME);
+    if ($cnameRecords) {
+        foreach ($cnameRecords as $record) {
+            $records['CNAME'][] = [
+                'target' => $record['target'],
+                'ttl' => $record['ttl']
+            ];
+        }
+    }
+    
+    // SOA-Record (Start of Authority)
+    $soaRecords = @dns_get_record($domain, DNS_SOA);
+    if ($soaRecords) {
+        foreach ($soaRecords as $record) {
+            $records['SOA'][] = [
+                'mname' => $record['mname'] ?? '',
+                'rname' => $record['rname'] ?? '',
+                'serial' => $record['serial'] ?? 0,
+                'refresh' => $record['refresh'] ?? 0,
+                'retry' => $record['retry'] ?? 0,
+                'expire' => $record['expire'] ?? 0,
+                'minimum_ttl' => $record['minimum-ttl'] ?? 0,
+                'ttl' => $record['ttl']
+            ];
+        }
+    }
+    
+    // Leere Arrays entfernen
+    return array_filter($records, fn($arr) => !empty($arr));
+}