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response.php (2256B)

      1 <?php
      2 /**
      3  * @package		OpenCart
      4  * @author		Daniel Kerr
      5  * @copyright	Copyright (c) 2005 - 2017, OpenCart, Ltd. (https://www.opencart.com/)
      6  * @license		https://opensource.org/licenses/GPL-3.0
      7  * @link		https://www.opencart.com
      8 */
      9 
     10 /**
     11 * Response class
     12 */
     13 class Response {
     14 	private $headers = array();
     15 	private $level = 0;
     16 	private $output;
     17 
     18 	/**
     19 	 * Constructor
     20 	 *
     21 	 * @param	string	$header
     22 	 *
     23  	*/
     24 	public function addHeader($header) {
     25 		$this->headers[] = $header;
     26 	}
     27 	
     28 	/**
     29 	 * 
     30 	 *
     31 	 * @param	string	$url
     32 	 * @param	int		$status
     33 	 *
     34  	*/
     35 	public function redirect($url, $status = 302) {
     36 		header('Location: ' . str_replace(array('&amp;', "\n", "\r"), array('&', '', ''), $url), true, $status);
     37 		exit();
     38 	}
     39 	
     40 	/**
     41 	 * 
     42 	 *
     43 	 * @param	int		$level
     44  	*/
     45 	public function setCompression($level) {
     46 		$this->level = $level;
     47 	}
     48 	
     49 	/**
     50 	 * 
     51 	 *
     52 	 * @return	array
     53  	*/
     54 	public function getOutput() {
     55 		return $this->output;
     56 	}
     57 	
     58 	/**
     59 	 * 
     60 	 *
     61 	 * @param	string	$output
     62  	*/	
     63 	public function setOutput($output) {
     64 		$this->output = $output;
     65 	}
     66 	
     67 	/**
     68 	 * 
     69 	 *
     70 	 * @param	string	$data
     71 	 * @param	int		$level
     72 	 * 
     73 	 * @return	string
     74  	*/
     75 	private function compress($data, $level = 0) {
     76 		if (isset($_SERVER['HTTP_ACCEPT_ENCODING']) && (strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== false)) {
     77 			$encoding = 'gzip';
     78 		}
     79 
     80 		if (isset($_SERVER['HTTP_ACCEPT_ENCODING']) && (strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'x-gzip') !== false)) {
     81 			$encoding = 'x-gzip';
     82 		}
     83 
     84 		if (!isset($encoding) || ($level < -1 || $level > 9)) {
     85 			return $data;
     86 		}
     87 
     88 		if (!extension_loaded('zlib') || ini_get('zlib.output_compression')) {
     89 			return $data;
     90 		}
     91 
     92 		if (headers_sent()) {
     93 			return $data;
     94 		}
     95 
     96 		if (connection_status()) {
     97 			return $data;
     98 		}
     99 
    100 		$this->addHeader('Content-Encoding: ' . $encoding);
    101 
    102 		return gzencode($data, (int)$level);
    103 	}
    104 	
    105 	/**
    106 	 * 
    107  	*/
    108 	public function output() {
    109 		if ($this->output) {
    110 			$output = $this->level ? $this->compress($this->output, $this->level) : $this->output;
    111 			
    112 			if (!headers_sent()) {
    113 				foreach ($this->headers as $header) {
    114 					header($header, true);
    115 				}
    116 			}
    117 			
    118 			echo $output;
    119 		}
    120 	}
    121 }