<?php
/**
* BLOCK AMAZON WS IP'S
*
* By Rafael Martín Soto: @rafainatica 2024
*
*/
$jsonFile = 'https://ip-ranges.amazonaws.com/ip-ranges.json';
$cacheFile = __DIR__ . '/../cache/amazon_ips.cache.json';
$cacheFileCsv = $cacheFile.'.csv';
$updateInterval = 7 * 24 * 60 * 60; // 7 days in seconds
// Check if the cache file exists and if the update time has passed
if ( file_exists($cacheFileCsv) && time() - filemtime($cacheFileCsv) < $updateInterval) {
// Cache file is valid, load data from cache
$csvContent = file_get_contents($cacheFileCsv); // Set CSV Content
} else {
// Download the new JSON file
$jsonContent = file_get_contents($jsonFile);
if( $jsonContent === false || strlen($jsonContent) < 500000 ){
// SOME ERROR. LOAD PREVIOUS CACHE FILE
$jsonContent = file_get_contents($cacheFile);
} else {
// Save the new content to the cache file
$jsonContent = str_replace( ["\r\n", "\r", "\n", ' '], '', $jsonContent); // Compress file
file_put_contents($cacheFile, $jsonContent); // Original file
}
// Prepare same file in .csv format (faster)
$ipData = json_decode($jsonContent, true);
$arrIps = [];
foreach( $ipData['prefixes'] as $prefix ){
$arrIps[] = $prefix['ip_prefix'];
}
$csvContent = implode(',', $arrIps); // Set CSV Content
file_put_contents($cacheFileCsv, $csvContent); // .csvfile
}
// Decode the JSON to obtain an array of IP addresses
$ipData = explode(',', $csvContent);
$myIp = $_SERVER['REMOTE_ADDR'];
foreach( $ipData as $ip ){
if(ip_in_range($myIp, $ip) ){
http_response_code(404);
die();
}
}
// Function to check if the client's IP address is in the specified range
function ip_in_range($ip, $range) {
list($subnet, $mask) = explode('/', $range);
$subnet = ip2long($subnet);
$ip = ip2long($ip);
$mask = ~((1 << (32 - $mask)) - 1);
return ($ip & $mask) == ($subnet & $mask);
}
?>
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