ISP Content Filtering

const API_URL = 'https://webfilteringdatabase.com/api/moderate.php';
const API_KEY = 'YOUR_API_KEY';

const TIER_POLICIES = {
    base: new Set(['Malware', 'Phishing', 'Botnet']),
    family: new Set(['Malware', 'Phishing', 'Adult Content',
        'Gambling', 'Violence', 'Drugs']),
    premium: new Set(['Malware', 'Phishing', 'Adult Content',
        'Gambling', 'Violence', 'Social Media', 'Streaming'])
};

async function filterSubscriberRequest(domain, tier) {
    const res = await fetch(API_URL, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ api_key: API_KEY, query: domain })
    });
    const data = await res.json();
    const blocked = TIER_POLICIES[tier] || TIER_POLICIES.base;
    const violations = (data.categories || [])
        .filter(c => blocked.has(c));

    if (violations.length) {
        return { action: 'BLOCK', reason: violations.join(', ') };
    }
    return { action: 'ALLOW', category: data.primary_category };
}

// Check subscriber requests
['streaming-service.com', 'adult-site.xxx',
 'news.com', 'social-media.com']
    .forEach(async d => {
        const r = await filterSubscriberRequest(d, 'family');
        console.log(`${r.action}: ${d}`);
    });

# Check a streaming domain for subscriber filtering
curl -X POST "https://webfilteringdatabase.com/api/moderate.php" \
  -H "Content-Type: application/json" \
  -d '{
    "api_key": "YOUR_API_KEY",
    "query": "streaming-service.com"
  }'

# Response: {"primary_category":"Streaming","risk_level":"low"}

# Check an adult domain
curl -X POST "https://webfilteringdatabase.com/api/moderate.php" \
  -H "Content-Type: application/json" \
  -d '{
    "api_key": "YOUR_API_KEY",
    "query": "adult-site.xxx"
  }'

# Response: {"primary_category":"Adult Content","risk_level":"high"}

# Check a news domain
curl -X POST "https://webfilteringdatabase.com/api/moderate.php" \
  -H "Content-Type: application/json" \
  -d '{
    "api_key": "YOUR_API_KEY",
    "query": "news.com"
  }'

# Response: {"primary_category":"News","risk_level":"low"}

# Check a social media domain
curl -X POST "https://webfilteringdatabase.com/api/moderate.php" \
  -H "Content-Type: application/json" \
  -d '{
    "api_key": "YOUR_API_KEY",
    "query": "social-media.com"
  }'

# Response: {"primary_category":"Social Media","risk_level":"low"}

<?php
$apiUrl = 'https://webfilteringdatabase.com/api/moderate.php';
$apiKey = 'YOUR_API_KEY';

$tiers = [
    'base'    => ['Malware', 'Phishing', 'Botnet'],
    'family'  => ['Malware', 'Phishing', 'Adult Content',
                  'Gambling', 'Violence', 'Drugs'],
    'premium' => ['Malware', 'Phishing', 'Adult Content',
                  'Gambling', 'Violence', 'Social Media']
];

function filterSubscriberRequest($domain, $tier, $apiUrl, $apiKey, $tiers) {
    $ch = curl_init($apiUrl);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode([
        'api_key' => $apiKey,
        'query'   => $domain
    ]));
    curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $result = json_decode(curl_exec($ch), true);
    curl_close($ch);

    $blocked = $tiers[$tier] ?? $tiers['base'];
    $violations = array_intersect($result['categories'] ?? [], $blocked);

    if (!empty($violations)) {
        return ['BLOCK', implode(', ', $violations)];
    }
    return ['ALLOW', $result['primary_category'] ?? 'Unknown'];
}

// ISP subscriber DNS request filtering
$domains = ['streaming-service.com', 'adult-site.xxx', 'news.com', 'social-media.com'];
foreach ($domains as $d) {
    [$action, $reason] = filterSubscriberRequest($d, 'family', $apiUrl, $apiKey, $tiers);
    echo "$action: $d — $reason\n";
}
?>