S2OJ/web/app/models/UOJResponse.php

<?php

class UOJResponse {
	public static function message($msg, $title = '消息') {
		if (UOJContext::isAjax()) {
			die($msg);
		} else {
			echoUOJPageHeader($title);
			echo $msg;
			echoUOJPageFooter();
			die();
		}
	}
	public static function page403($msg = null) {
		header($_SERVER['SERVER_PROTOCOL'] . " 403 Forbidden", true, 403); 
		if ($msg === null) {
			$msg = '<div class="text-center"><div style="font-size:233px">403</div><p>禁止入内！ T_T</p></div>';
		}
		UOJResponse::message($msg, '403');
	}
	public static function page404($msg = null) {
		header($_SERVER['SERVER_PROTOCOL'] . " 404 Not Found", true, 404);
		if ($msg === null) {
			$msg = '<div class="text-center"><div style="font-size:233px">404</div><p>唔……未找到该页面……你是从哪里点进来的……&gt;_&lt;……</p></div>';
		}
		self::message($msg, '404');
	}
	public static function page406($msg = null) {
		header($_SERVER['SERVER_PROTOCOL'] . " 406 Not Acceptable", true, 406);
		if ($msg === null) {
			$msg = '<div class="text-center"><div style="font-size:233px">406</div><p>服务器对你提交的请求好像不太满意</p></div>';
		}
		self::message($msg, '406');
	}
	public static function page500($msg) {
		header($_SERVER['SERVER_PROTOCOL'] . " 500 Internal Server Error", true, 500);
		self::message($msg, '500');
	}
	public static function page503($msg) {
		header($_SERVER['SERVER_PROTOCOL'] . " 503 Service Unavailable", true, 503);
		self::message($msg, '503');
	}

	public static function xsendfile($path, $cfg = []) {
		$cfg += [
		    'mimetype' => null,
		    'attachment' => null
		];

		$path = realpath($path);
		if (!is_file($path)) {
			self::page404();
		}

		if ($cfg['mimetype'] === null) {
			$cfg['mimetype'] = (new finfo(FILEINFO_MIME))->file($path);
			if ($cfg['mimetype'] === false) {
				self::page404();
			}
		}

		header("X-Sendfile: $path");
		header("Content-type: {$cfg['mimetype']}");
		if ($cfg['attachment'] !== null) {
			header("Content-Disposition: attachment; filename={$cfg['attachment']}");
		}
		die();
	}

	public static function echofile($echo_func, $cfg = []) {
		$cfg += [
		    'mimetype' => 'text/plain',
		    'attachment' => null
		];

		header("Content-type: {$cfg['mimetype']}");
		if ($cfg['attachment'] !== null) {
			header("Content-Disposition: attachment; filename={$cfg['attachment']}");
		}
		$echo_func();
		die();
	}
}