URLSafeSplitPathTransport.php

Go to the documentation of this file.

<?php
 
namespace ILIAS\FileDelivery\Token\Transport;
 
class URLSafeSplitPathTransport implements Transport
{
    public function __construct(private int $max_length = 128)
    {
    }
 
    public function prepareForTransport(string $compressed_token): string
    {
        $string = rtrim(str_replace(['+', '/'], ['-', '_'], base64_encode($compressed_token)), '=');
        // split string into chunks of 255 characters and separate them with a slash
        $string = chunk_split($string, $this->max_length, "/");
 
        return $string;
    }
 
    public function readFromTransport(string $compressed_token): string
    {
        // combine chunks
        $compressed_token = str_replace("/", "", $compressed_token);
 
        return base64_decode(str_replace(['-', '_'], ['+', '/'], $compressed_token . '=='));
    }
 
}