streams/Zotlabs/Module/Ca.php

<?php
namespace Zotlabs\Module;

use Zotlabs\Web\Controller;

class Ca extends Controller {

	function get() {
		if (argc() > 1) {
			$path = 'cache/img/' . substr(argv(1),0,2) . '/' . argv(1);

			if (file_exists($path) && filesize($path)) {
				$x = @getimagesize($path);
				if ($x) {
					header('Content-Type: ' . $x['mime']);
				}

				$cache = intval(get_config('system','photo_cache_time'));
				if (! $cache) {
					$cache = (3600 * 24); // 1 day
				}
			 	header('Expires: ' . gmdate('D, d M Y H:i:s', time() + $cache) . ' GMT');
				// Set browser cache age as $cache.  But set timeout of 'shared caches'
				// much lower in the event that infrastructure caching is present.
				$smaxage = intval($cache/12);
				header('Cache-Control: s-maxage=' . $smaxage . '; max-age=' . $cache . ';');
	
				$infile = fopen($path,'rb');
				$outfile = fopen('php://output','wb');
				if ($infile && $outfile) {
					pipe_streams($infile,$outfile);
				}
				fclose($infile);
				fclose($outfile);
				killme();
			}

			if ($_GET['url']) {
				goaway($url);
			}
		}
		http_status_exit(404,'Not found');
	}
}