image_proxy.php

<?php

$config = require "config.php";
require "misc/tools.php";

$url = $_REQUEST["url"];

$split_url = explode("/", $url);
$base_url = $split_url[2];

$base_url_main_split = explode(".", strrev($base_url));
$base_url_main = strrev($base_url_main_split[1]) . "." . strrev($base_url_main_split[0]);

$allowed_domains = array("qwant.com", "wikimedia.org", "brave.com", "startpage.com", "startmail.com", "protonmail.com", "proton.me");

if (in_array($base_url_main, $allowed_domains)) {
    $image = $url;
    $image_src = request($image);

    header("Content-Type: image/jpeg");
    echo $image_src;
}