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<?php
namespace Core;
/**
* Response class
*
* @package core
* @author Frederic Guillot
*/
class Response
{
/**
* Send no cache headers
*
* @access public
*/
public function nocache()
{
header('Pragma: no-cache');
header('Expires: Sat, 26 Jul 1997 05:00:00 GMT');
// Use no-store due to a Chrome bug: https://code.google.com/p/chromium/issues/detail?id=28035
header('Cache-Control: no-store, must-revalidate');
}
/**
* Send a custom Content-Type header
*
* @access public
* @param string $mimetype Mime-type
*/
public function contentType($mimetype)
{
header('Content-Type: '.$mimetype);
}
/**
* Force the browser to download an attachment
*
* @access public
* @param string $filename File name
*/
public function forceDownload($filename)
{
header('Content-Disposition: attachment; filename="'.$filename.'"');
}
/**
* Send a custom HTTP status code
*
* @access public
* @param integer $status_code HTTP status code
*/
public function status($status_code)
{
header('Status: '.$status_code);
header($_SERVER['SERVER_PROTOCOL'].' '.$status_code);
}
/**
* Redirect to another URL
*
* @access public
* @param string $url Redirection URL
*/
public function redirect($url)
{
header('Location: '.$url);
exit;
}
/**
* Send a Json response
*
* @access public
* @param array $data Data to serialize in json
* @param integer $status_code HTTP status code
*/
public function json(array $data, $status_code = 200)
{
$this->status($status_code);
$this->nocache();
header('Content-Type: application/json');
echo json_encode($data);
exit;
}
/**
* Send a text response
*
* @access public
* @param string $data Raw data
* @param integer $status_code HTTP status code
*/
public function text($data, $status_code = 200)
{
$this->status($status_code);
$this->nocache();
header('Content-Type: text/plain; charset=utf-8');
echo $data;
exit;
}
/**
* Send a HTML response
*
* @access public
* @param string $data Raw data
* @param integer $status_code HTTP status code
*/
public function html($data, $status_code = 200)
{
$this->status($status_code);
$this->nocache();
header('Content-Type: text/html; charset=utf-8');
echo $data;
exit;
}
/**
* Send a XML response
*
* @access public
* @param string $data Raw data
* @param integer $status_code HTTP status code
*/
public function xml($data, $status_code = 200)
{
$this->status($status_code);
$this->nocache();
header('Content-Type: text/xml; charset=utf-8');
echo $data;
exit;
}
/**
* Send a javascript response
*
* @access public
* @param string $data Raw data
* @param integer $status_code HTTP status code
*/
public function js($data, $status_code = 200)
{
$this->status($status_code);
header('Content-Type: text/javascript; charset=utf-8');
echo $data;
exit;
}
/**
* Send a binary response
*
* @access public
* @param string $data Raw data
* @param integer $status_code HTTP status code
*/
public function binary($data, $status_code = 200)
{
$this->status($status_code);
$this->nocache();
header('Content-Transfer-Encoding: binary');
header('Content-Type: application/octet-stream');
echo $data;
exit;
}
/**
* Send the security header: Content-Security-Policy
*
* @access public
* @param array $policies CSP rules
*/
public function csp(array $policies = array())
{
$policies['default-src'] = "'self'";
$values = '';
foreach ($policies as $policy => $hosts) {
if (is_array($hosts)) {
$acl = '';
foreach ($hosts as &$host) {
if ($host === '*' || $host === 'self' || strpos($host, 'http') === 0) {
$acl .= $host.' ';
}
}
}
else {
$acl = $hosts;
}
$values .= $policy.' '.trim($acl).'; ';
}
header('Content-Security-Policy: '.$values);
}
/**
* Send the security header: X-Content-Type-Options
*
* @access public
*/
public function nosniff()
{
header('X-Content-Type-Options: nosniff');
}
/**
* Send the security header: X-XSS-Protection
*
* @access public
*/
public function xss()
{
header('X-XSS-Protection: 1; mode=block');
}
/**
* Send the security header: Strict-Transport-Security (only if we use HTTPS)
*
* @access public
*/
public function hsts()
{
if (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off') {
header('Strict-Transport-Security: max-age=31536000');
}
}
/**
* Send the security header: X-Frame-Options (deny by default)
*
* @access public
* @param string $mode Frame option mode
* @param array $urls Allowed urls for the given mode
*/
public function xframe($mode = 'DENY', array $urls = array())
{
header('X-Frame-Options: '.$mode.' '.implode(' ', $urls));
}
}
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