Jak obejít Mixed Content

$image_url = 'http://muj-stary-web.cz/obrazky/';function get_headers_from_response($response){ $headers = Array(); list($headers_raw, $body) = explode("rnrn", $response, 2); foreach (explode("rn", $headers_raw) as $i => $line) { if ($i === 0) { $headers = $line; } else { list($name, $value) = explode(': ', $line); $headers = $value; } } return Array($headers, $body);}$request_headers = Array();if (isset($_GET)) { $image_url .= $_GET;} else { header('HTTP/1.1 404 Not Found'); exit;}if (isset($_SERVER)) { $request_headers[] = "If-Modified-Since: " . $_SERVER;}if (isset($_SERVER)) { $request_headers[] = "If-None-Match: " . $_SERVER;}$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $image_url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);curl_setopt($ch, CURLOPT_HEADER, true);curl_setopt($ch, CURLOPT_USERAGENT, 'php-image-proxy/1.0');curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);curl_setopt($ch, CURLOPT_BUFFERSIZE, 12800);curl_setopt($ch, CURLOPT_NOPROGRESS, true);curl_setopt($ch, CURLOPT_HTTPHEADER, $request_headers);$response = curl_exec ($ch);curl_close ($ch);list($headers, $image) = get_headers_from_response($response);if (array_key_exists('Location', $headers)) { header("HTTP/1.1 301 Moved Permanently"); header('Location: ' . $headers); exit;} else { header($headers);}if (array_key_exists('Content-Type', $headers)) { $contentType = $headers; # vracet pouze obrázky if (strpos($contentType, 'image/') === false) { header('HTTP/1.1 404 Not Found'); exit; } header('Content-Type: ' . $contentType);}if (array_key_exists('Content-Length', $headers)) header('Content-Length: ' . $headers);if (array_key_exists('Expires', $headers)) header('Expires: ' . $headers);if (array_key_exists('Cache-Control', $headers)) header('Cache-Control: ' . $headers);if (array_key_exists('Last-Modified', $headers)) header('Last-Modified: ' . $headers);echo $image;