146 lines
2.6 KiB
PHP
146 lines
2.6 KiB
PHP
<?php
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/**
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* @package OpenCart
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* @author Daniel Kerr
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* @copyright Copyright (c) 2005 - 2022, OpenCart, Ltd. (https://www.opencart.com/)
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* @license https://opensource.org/licenses/GPL-3.0
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* @link https://www.opencart.com
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*/
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namespace Opencart\System\Library;
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/**
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* Class Response
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*
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* Stores the response so the correct headers can go out before the response output is shown.
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*
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*/
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class Response {
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/**
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* @var array
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*/
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private array $headers = [];
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/**
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* @var int
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*/
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private int $level = 0;
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/**
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* @var string
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*/
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private string $output = '';
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/**
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* Constructor
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*
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* @param string $header
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*
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*/
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public function addHeader(string $header): void {
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$this->headers[] = $header;
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}
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/**
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* Get Headers
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*
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* @param array
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*
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*/
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public function getHeaders(): array {
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return $this->headers;
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}
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/**
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* Redirect
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*
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* @param string $url
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* @param int $status
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*
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*/
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public function redirect(string $url, int $status = 302): void {
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header('Location: ' . str_replace(['&', "\n", "\r"], ['&', '', ''], $url), true, $status);
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exit();
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}
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/**
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* Set Compression
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*
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* @param int $level
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*/
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public function setCompression(int $level): void {
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$this->level = $level;
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}
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/**
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* Set Output
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*
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* @param string $output
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*/
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public function setOutput(string $output): void {
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$this->output = $output;
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}
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/**
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* Get Output
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*
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* @return array
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*/
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public function getOutput(): string {
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return $this->output;
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}
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/**
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* Compress
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*
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* @param string $data
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* @param int $level
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*
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* @return string
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*/
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private function compress(string $data, int $level = 0): string {
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if (isset($_SERVER['HTTP_ACCEPT_ENCODING']) && (strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== false)) {
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$encoding = 'gzip';
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}
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if (isset($_SERVER['HTTP_ACCEPT_ENCODING']) && (strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'x-gzip') !== false)) {
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$encoding = 'x-gzip';
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}
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if (!isset($encoding) || ($level < -1 || $level > 9)) {
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return $data;
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}
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if (!extension_loaded('zlib') || ini_get('zlib.output_compression')) {
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return $data;
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}
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if (headers_sent()) {
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return $data;
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}
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if (connection_status()) {
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return $data;
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}
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$this->addHeader('Content-Encoding: ' . $encoding);
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return gzencode($data, $level);
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}
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/**
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* Output
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*
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* Displays the set HTML output
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*/
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public function output(): void {
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if ($this->output) {
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$output = $this->level ? $this->compress($this->output, $this->level) : $this->output;
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if (!headers_sent()) {
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foreach ($this->headers as $header) {
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header($header, true);
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}
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}
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echo $output;
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}
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}
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}
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