Clear Cloudflare cache Chevereto

cf-purge.php

<?php

/*
Cloudflare's purge directly depends on what your url looks like, in my case it's an example: https://s1.domain.com/Akd3X.jpg
That is, with the name of the encoded image.

Within my script I had to place a function to encode the image because the deleted image table does not have its code encoded.

I quickly made this script a while ago, it doesn't follow any good programming practices.

This script is not plug and play in the variables, each case must be analyzed.
*/

//crontab, you need define run every 5 minutes
//database select will pick up images deleted 5 minutes ago
//*/5 * * * * sudo -u nginx php /home/nginx/script/cf-purge.php > /home/nginx/script/cf-purge.log

//salt chevereto
$chvSalt = ""; //you can get salt here https://yourdomain.app/dashboard/settings/system

$chvUrlDirect = "https://s1.domain.com/"; //direct url of images, Example: https://s1.domain.com/xxxxx.png you need put: https://s1.domain.com/

//cloudflare api config
$cfEmail = "[email protected]";
$cfAuthKey = "";
$cfZone = "zone of your cloudflare, you can get on Zone ID in dashboard";

//mysql
$servername = "127.0.0.1";
$username = "user";
$password = "pass";
$dbname = "dbname";



//encode decode image name 
//this function was captured within the chevereto code
function chvEncDec($in, $salt, $action = 'encode'){
        $cheveretoID = null;
        $index = 'abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
		
        $id_padding = intval("5000");
        // Use a stock version of the hashed values (faster execution)
        if (isset($cheveretoID)) {
                $passhash = $cheveretoID['passhash'];
                $p = $cheveretoID['p'];
                $i = $cheveretoID['i'];
        } else {
                for ($n = 0; $n < strlen($index); ++$n) {
                        $i[] = substr($index, $n, 1);
                }
                $passhash = hash('sha256', $salt);
                $passhash = (strlen($passhash) < strlen($index)) ? hash('sha512', $salt) : $passhash;
                for ($n = 0; $n < strlen($index); ++$n) {
                        $p[] = substr($passhash, $n, 1);
                }
                $cheveretoID = [
                        'passhash' => $passhash,
                        'p' => $p,
                        'i' => $i,
                ];
        }
        array_multisort($p, SORT_DESC, $i);
        $index = implode($i);
        $base = strlen($index);
        if ($action == 'decode') {
                $out = 0;
                $len = strlen($in) - 1;
                for ($t = 0; $t <= $len; ++$t) {
                        $bcpow = bcpow((string) $base, (string) ($len - $t));
                        $out = $out + strpos($index, substr($in, $t, 1)) * $bcpow;
                }
                if ($id_padding > 0) {
                        $out = $out / $id_padding;
                }
                $out = (int) sprintf('%s', $out);
        } else {
                if ($id_padding > 0) {
                        $in = $in * $id_padding;
                }
                $out = '';
                for ($t = floor(log((float) $in, $base)); $t >= 0; --$t) {
                        $bcp = bcpow((string) $base, (string) $t);
                        $a = floor($in / $bcp) % $base;
                        $out = $out . substr($index, $a, 1);
                        $in = $in - ($a * $bcp);
                }
        }

        return $out;
}


function cfPurge($files, $cfEmail, $cfAuthKey, $cfZone){
        $curl = curl_init();

        curl_setopt_array($curl, array(
          CURLOPT_URL => 'https://api.cloudflare.com/client/v4/zones/' . $cfZone . '/purge_cache',
          CURLOPT_RETURNTRANSFER => true,
          CURLOPT_ENCODING => '',
          CURLOPT_MAXREDIRS => 10,
          CURLOPT_TIMEOUT => 0,
          CURLOPT_FOLLOWLOCATION => true,
          CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
          CURLOPT_CUSTOMREQUEST => 'POST',
          CURLOPT_POSTFIELDS => $files,
          CURLOPT_HTTPHEADER => array(
                'Content-Type: application/json',
                'X-Auth-Email: ' . $cfEmail,
                'X-Auth-Key: ' . $cfAuthKey,
          ),
        ));

        $response = curl_exec($curl);

        curl_close($curl);
        return $response;
}





try {
        $conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
        $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
	
	//get images deleted from table chv_deletions 
	//images deleted with 5 min blocks ago
        $stmt = $conn->prepare("
                SELECT * FROM chv_deletions WHERE deleted_date_gmt
                BETWEEN
                        date_format(DATE_SUB(NOW(),INTERVAL 10 MINUTE), '%Y-%m-%d %H:%i:00')
                AND
                        date_format(DATE_SUB(NOW(),INTERVAL 5 MINUTE), '%Y-%m-%d %H:%i:00')
                ORDER BY deleted_date_gmt DESC;
        ");
        $stmt->execute();

        // set the resulting array to associative
        //$result = $stmt->setFetchMode(PDO::FETCH_ASSOC);

        $result = $stmt->fetchAll();

        if(count($result)<1){
                echo "nothing for the purge";
                exit();
        }

        #print_r($result);

        $allImages = [];

        foreach($result as $v){
                #$ext = "." . pathinfo($v['deleted_content_original_filename'], PATHINFO_EXTENSION);
		
		//encode image from id
		$urlNameDecoded = $chvUrlDirect . chvEncDec($v['deleted_content_id'], $chvSalt);

		//set all images variants
                $allImages[] = $urlNameDecoded . ".jpg";
                $allImages[] = $urlNameDecoded . ".jpeg";
                $allImages[] = $urlNameDecoded . ".png";
                $allImages[] = $urlNameDecoded . ".bmp";
                $allImages[] = $urlNameDecoded . ".gif";
                $allImages[] = $urlNameDecoded . ".webp";
				
                $allImages[] = $urlNameDecoded . ".md.jpg";
                $allImages[] = $urlNameDecoded . ".md.jpeg";
                $allImages[] = $urlNameDecoded . ".md.png";
                $allImages[] = $urlNameDecoded . ".md.bmp";
                $allImages[] = $urlNameDecoded . ".md.gif";
                $allImages[] = $urlNameDecoded . ".md.webp";
				
                $allImages[] = $urlNameDecoded . ".th.jpg";
                $allImages[] = $urlNameDecoded . ".th.jpeg";
                $allImages[] = $urlNameDecoded . ".th.png";
                $allImages[] = $urlNameDecoded . ".th.bmp";
                $allImages[] = $urlNameDecoded . ".th.gif";
                $allImages[] = $urlNameDecoded . ".th.webp";
        }

	//create a chuncks of 30 images, beacause the limit of api cloudflare
        $imagesChunks = array_chunk($allImages, 30);

        foreach($imagesChunks as $v){
                $files = json_encode(["files" => $v], JSON_UNESCAPED_SLASHES);
                $cfReturn = cfPurge($files, $cfEmail, $cfAuthKey, $cfZone);
                echo $cfReturn;
                echo $files . "\n\n";
        }

} catch(PDOException $e) {
  echo "Error: " . $e->getMessage();
}
$conn = null;