<?php

	if (($_SERVER['REQUEST_METHOD'] != 'GET') && ($_SERVER['REQUEST_METHOD'] != 'HEAD')) {
		header('HTTP/1.1 405 Sorry, only GET or HEAD.');
		die();
	}

	$_SERVER['HTTP_REFERER'] = strtolower($_SERVER['HTTP_REFERER']);
	if ($_SERVER['HTTP_REFERER']
		&& !strpos($_SERVER['HTTP_REFERER'], 'projectjj.')
		&& !strpos($_SERVER['HTTP_REFERER'], 'pjj.cc')) {
		$_REQUEST['url'] = 'blocked.gif';
	} else {
	    if (!preg_match('@[a-z0-9]{32}\.(gif|jpg|swf|png)@', $_REQUEST['url'])) {
			require_once('../../mmcache.php');
			$lbl = 'knownimgs';
			MMC_Lock($lbl);
			$knownimgs = MMC_Get($lbl);
			if (empty($knownimgs))
				$knownimgs = array();
			if (empty($knownimgs[$_REQUEST['url']])) {
				require_once('../../config.php');
				require_once('../../poolsql.php');
				require_once('../../modules/library_image.php');
				$fname = SQL_EscapeString($_REQUEST['url']);
				$rez = SQL_SingleQuery(
					"SELECT
					imgs.hash as hash,
					mimes.mime_type as mime
					FROM
					{$GLOBALS['sql_prefix']}images as imgs
					LEFT JOIN {$GLOBALS['sql_prefix']}mime_types as mimes
						ON (imgs.mime_id=mimes.mime_id)
					LEFT JOIN {$GLOBALS['sql_prefix']}image_meta as meta
						ON (imgs.id=meta.image_id)
					WHERE
					meta.name='{$fname}' ORDER BY imgs.created DESC LIMIT 1",
					NULL, __FILE__.' : '.__LINE__.' : '.__FUNCTION__);
				if (SQL_NumRows($rez) > 0) {
					$row = SQL_FetchAssoc($rez);
					$knownimgs[$_REQUEST['url']] = $row['hash'].'.'.ImageMimeToExt($row['mime']);
					MMC_Set($lbl, $knownimgs);
				}
				SQL_FreeResult($rez);
			}
			$_REQUEST['url'] = $knownimgs[$_REQUEST['url']];
			//header('X-pJJ-ImgMem: '.memory_get_usage().'/'.count($knownimgs));
			MMC_Unlock($lbl);

			if (!empty($_REQUEST['url'])) {
			    header('HTTP/1.1 301 Moved Permanently');
			    header('Location: http://i.pjj.cc/'.$_REQUEST['url']);
			    die();
			}
	    }
		$_REQUEST['url'] = strtolower($_REQUEST['url']{0}.'/'.$_REQUEST['url']);
	}
	
	if (file_exists($_REQUEST['url'])) {
		//$etag = preg_replace('.*([a-f0-9]{32}).*', '\1', $_REQUEST['url']);
		$etag = substr($_REQUEST['url'], -36, 32);
		//header('X-pJJ-Filename: '.$_REQUEST['url']);
		header('ETag: "'.$etag.'"');

		if ($_SERVER['HTTP_IF_MODIFIED_SINCE']) {
			header('HTTP/1.1 304 Not Modified');
			die();
		}

		$image = getimagesize($_REQUEST['url']);
		$fz = fopen($_REQUEST['url'], 'rb');
		if ($image && $fz) {
			header('Content-Type: '.$image['mime']);
			header('Content-Length: '.filesize($_REQUEST['url']));
			header('Date: '.gmdate('D, d M Y H:i:s').' GMT');
			header('Last-Modified: Sat, 01 Jan 2000 11:59:59 GMT');
			//header('Expires: Wed, 01 Jan 2020 12:00:00 GMT');
			header('Accept-Ranges: bytes');
			header('Connection: close');
			if ($_SERVER['REQUEST_METHOD'] != 'HEAD') {
				fpassthru($fz);
			}
			fclose($fz);
			flush();

			ignore_user_abort(true);
			ob_start();
			require_once('../../config.php');
			require_once('../../poolsql.php');
			SQL_EmptyQuery("UPDATE {$GLOBALS['sql_prefix']}images SET lasthit=now() WHERE hash='{$etag}'", __FILE__.' : '.__LINE__.' : '.__FUNCTION__);
			//header('X-pJJ-Debug: '.ob_get_contents().' : '.serialize($GLOBALS['sql_cur']));
			ob_end_clean();
			
			die();
		}
	}

	header('HTTP/1.1 404 Image Does Not Exist');
	header('Location: http://gfx.projectjj.com/null.gif');
?>