//Get all magazines

$data = \Httpful\Request::get("https://d3og6tlt23zks5.cloudfront.net/magazines?ppage=1&per_page=1000000&languages=&sort=publish_date&safe=false")
            ->addHeader("Content-Type", "application/json")
            ->expectsJson()
            ->send();

	foreach(json_decode($data)->content as $mag){

		//Process each $mag (Magazine)

		 $data = \Httpful\Request::get("https://d3og6tlt23zks5.cloudfront.net/magazines/$mag->uuid?ppage=1&per_page=1000000")
                ->addHeader("Content-Type", "application/json")
                ->expectsJson()
                ->send();

		foreach (json_decode($data)->content as $issue) {

			//Process each magazine issue as you wish. Make sure to save the id and publication

			$opts = [
                "http" => [
                    "method" => "GET",
                    "header" => "User-Agent: Mozilla/5.0 (Windows NT 10.0; …) Gecko/20100101 Firefox/66.0 \r\n" .
                        "X-AUTH-TOKEN: GET YOUR OWN AUTH TOKEN AND PUT IT HERE\r\n" .
                        "Referer: https://go.readly.com/magazines/51c1819803c6b7589300009f\r\n"
                ]
            ];

			$headers = stream_context_create($opts);
            $token = file_get_contents("https://api-eu.readly.com/issue/$issue->uuid/content/token?format=webp&r=2400", false, $headers);

			$data = \Httpful\Request::get("https://api-eu.readly.com/content/$token")
                ->addHeader("Content-Type", "application/json")
                ->addHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; …) Gecko/20100101 Firefox/66.0")
                ->addHeader("X-AUTH-TOKEN", "GET YOUR OWN AUTH TOKEN AND PUT IT HERE")
                ->addHeader("Referer", "https://go.readly.com/")
                ->expectsJson()
                ->send();


			$i=1;
			foreach(json_decode($data)->content as $page){

                file_put_contents($i . ".webp",file_get_contents($page));

                shell_exec("node readly.js $issue->uuid  $i .webp");
				$i = $i+1;

            }


		}


	}






	And readly.js is:

var fs = require('fs');

function decodeImg(buffer, issueId) {
    var data = new Uint8Array(buffer);
    for (var i = 0; i <= data.length - 1; i++)
        data[i] = data[i] ^ issueId.charCodeAt(i % issueId.length);
    return data;
}

var issueId = process.argv[2];
var source = process.argv[3];

if( issueId && source ) {
    var fileBuffer = fs.readFileSync(source);
    fs.writeFileSync( 'decoded-' + source, decodeImg(fileBuffer, issueId) );
} else {
    console.log('Use: node decode.js [issueId] [fileName]');
}