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<?php |
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/** |
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* This file is part of the Shieldon package. |
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* |
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* (c) Terry L. <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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* php version 7.1.0 |
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* |
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* @category Web-security |
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* @package Shieldon |
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* @author Terry Lin <[email protected]> |
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* @copyright 2019 terrylinooo |
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* @license https://github.com/terrylinooo/shieldon/blob/2.x/LICENSE MIT |
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* @link https://github.com/terrylinooo/shieldon |
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* @see https://shieldon.io |
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*/ |
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declare(strict_types=1); |
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namespace Shieldon\Firewall\Panel; |
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use Psr\Http\Message\ResponseInterface; |
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use Shieldon\Firewall\HttpFactory; |
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use function Shieldon\Firewall\get_response; |
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/** |
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* The static asset files such as CSS, JavaScript. |
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*/ |
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class Asset extends BaseController |
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{ |
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/** |
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* Public methods | Desctiotion |
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* ----------------------|--------------------------------------------- |
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* css | Output the content contains CSS. |
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* js | Output the content contains JavaScript. |
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* favicon | Output the content contains favicon's binary string. |
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* logo | Output the content contains logo's binary string. |
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* ----------------------|--------------------------------------------- |
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*/ |
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/** |
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* The directory in where the static assets of the firewall panel are placed. |
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*/ |
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const PANEL_ASSET_DIR = __DIR__ . '/../../../assets'; |
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/** |
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* Constructor. |
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*/ |
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public function __construct() |
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{ |
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parent::__construct(); |
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} |
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/** |
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* Output the content contains CSS to the browser. |
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* |
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* @return ResponseInterface |
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*/ |
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public function css(): ResponseInterface |
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{ |
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return $this->getResponseWithContentType( |
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'text/css; charset=UTF-8', |
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$this->loadCss() |
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); |
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} |
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/** |
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* Output the content contains JavaScript to the browser. |
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* |
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* @return ResponseInterface |
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*/ |
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public function js(): ResponseInterface |
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{ |
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return $this->getResponseWithContentType( |
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'text/javascript; charset=UTF-8', |
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$this->loadJs() |
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); |
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} |
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/** |
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* Output the content contains image binary string to the browser. |
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* |
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* @return ResponseInterface |
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*/ |
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public function favicon(): ResponseInterface |
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{ |
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return $this->getResponseWithContentType( |
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'image/x-icon', |
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$this->loadFavicon() |
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); |
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} |
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/** |
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* Output the content contains logo's binary string to the browser. |
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* |
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* @return ResponseInterface |
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*/ |
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public function logo(): ResponseInterface |
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{ |
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return $this->getResponseWithContentType( |
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'image/png', |
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$this->loadLogo() |
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); |
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} |
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/** |
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* Load CSS content. |
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* |
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* @return string |
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*/ |
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protected function loadJs(): string |
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{ |
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ob_start(); |
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echo file_get_contents(self::PANEL_ASSET_DIR . '/dist/app-packed.js'); |
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$output = ob_get_contents(); |
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ob_end_clean(); |
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return $this->filterString($output); |
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} |
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/** |
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* Load CSS content. |
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* |
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* @return string |
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*/ |
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protected function loadCss(): string |
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{ |
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ob_start(); |
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echo file_get_contents(self::PANEL_ASSET_DIR . '/dist/app-packed.css'); |
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$output = ob_get_contents(); |
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ob_end_clean(); |
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return $this->filterString($output); |
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} |
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/** |
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* Load Shieldon's favicon. |
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* |
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* @return string |
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*/ |
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protected function loadFavicon(): string |
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{ |
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ob_start(); |
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echo file_get_contents(self::PANEL_ASSET_DIR . '/src/images/favicon.ico'); |
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$output = ob_get_contents(); |
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ob_end_clean(); |
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return $output; |
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} |
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/** |
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* Load Shieldon's logo. |
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* |
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* @return string |
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*/ |
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protected function loadLogo(): string |
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{ |
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ob_start(); |
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echo file_get_contents(self::PANEL_ASSET_DIR . '/src/images/logo.png'); |
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$output = ob_get_contents(); |
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ob_end_clean(); |
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return $output; |
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} |
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/** |
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* Get server response with content. |
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* |
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* @param string $contentType The content type. |
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* @param string $body The data sring. |
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* |
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* @return ResponseInterface |
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*/ |
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private function getResponseWithContentType(string $contentType, string $body): ResponseInterface |
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{ |
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$response = get_response(); |
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$response = $response->withHeader('Content-Type', $contentType); |
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$stream = HttpFactory::createStream(); |
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$stream->write($body); |
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$stream->rewind(); |
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$response = $response->withBody($stream); |
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return $this->withCacheHeader($response); |
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} |
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/** |
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* Return the header with cache parameters. |
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* |
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* @param ResponseInterface $response The PSR-7 server response. |
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* |
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* @return ResponseInterface |
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*/ |
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private function withCacheHeader(ResponseInterface $response): ResponseInterface |
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{ |
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$seconds = 86400; // 24 hours |
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$response = $response->withHeader('Expires', gmdate('D, d M Y H:i:s', time() + $seconds) . ' GMT'); |
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$response = $response->withHeader('Pragma', 'cache'); |
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$response = $response->withHeader('Cache-Control', 'max-age=' . $seconds); |
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return $response; |
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} |
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/** |
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* Remove the PHP syntax, prevent the possible security issues. |
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* |
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* @param string $string |
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* |
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* @return string |
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*/ |
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private function filterString(string $string): string |
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{ |
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return str_replace(['<?php', '<?', '?>'], '', $string); |
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} |
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} |
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