<?
$resolvers = array('haruhiobjectcache' => array ('resolverurl' => 'http://objectcache.web.vm.haruhi.eu/object.php?%s'));

if (isset($_GET['service'])) $service = $_GET['service'];
if (isset($_GET['request'])) $urn =     $_GET['request'];
switch ($service) {
	case 'N2R':
		#print_r ($_SERVER);
		#print_r ($_GET);
		if (!preg_match('/^urn:sha1:[0-9a-zA-Z]+$/', $urn)) {
			header('HTTP/1.1 400 Unrecognized identifier format');
			print "Error: the requested identifier is not in a recognized format.";
			return;
		}
		$req = file_get_contents(sprintf($resolvers['haruhiobjectcache']['resolverurl'], $urn));
		$response = parse_http_response($http_response_header);
		if ($response['response']['code'] == 200) {
			header('Content-Type: '.$response['headers']['Content-Type']);
			header('Content-Disposition: '.$response['headers']['Content-Disposition']);
			header('Content-Length: '.$response['headers']['Content-Length']);
			header('Last-Modified: '.$response['headers']['Last-Modified']);
			header('Expires: '.$response['headers']['Expires']);
			//header('X-Resolver: '.'haruhiobjectcache');
			print $req;
		} else {
			header('HTTP/1.1 404 Image not found');
			print "Unable to retrieve object. <br/>";
			//print "You may be able to find what you want on <a href=\"http://urnc.yi.org/$urn\">http://urnc.yi.org</a><br/>";
			print "The following response may be helpful in working out what happened: ";
			print "<pre>"; print_r ($response); print "</pre>";
		}
		break;
	default:
		header('HTTP/1.1 400 Service not provided');
		print "Error: the requested service is not provided by this resolver.";
		//print_r ($_SERVER);
}

function parse_http_response($http_response_header) {
	if (preg_match('/^([^ ]+) ([^ ]+) (.+)$/', $http_response_header[0], $r)) {
		$parse['response']['raw'] = $http_response_header[0];
		$parse['response']['protocol'] = $r[1];
		$parse['response']['code'] = $r[2];
		$parse['response']['text'] = $r[3];

		foreach ($http_response_header as $header) {
			if (preg_match('/^([^:]+): ?(.+)$/', $header, $r)) {
				$parse['headers'][$r[1]] = $r[2];
			}
		}
	} else { return FALSE; }
	return $parse;
}
?>