randomToken('md5');
// Store a file in the session save path (safer than /tmp, as open_basedir might limit that)
file_put_contents($this->pathForToken($token), $token);
return $token;
}
protected function checkToken($token) {
$file = $this->pathForToken($token);
$content = null;
if (file_exists($file)) {
$content = file_get_contents($file);
unlink($file);
}
return $content == $token;
}
public function __construct($parameterName) {
// Store the parameter name
$this->parameterName = $parameterName;
// Store the parameter value
$this->parameter = isset($_GET[$parameterName]) ? $_GET[$parameterName] : null;
// Store the token
$this->token = isset($_GET[$parameterName.'token']) ? $_GET[$parameterName.'token'] : null;
// If a token was provided, but isn't valid, ignore it
if ($this->token && (!$this->checkToken($this->token))) $this->token = null;
}
public function parameterProvided() {
return $this->parameter !== null;
}
public function tokenProvided() {
return $this->token !== null;
}
public function params() {
return array(
$this->parameterName => $this->parameter,
$this->parameterName.'token' => $this->genToken()
);
}
/** What to use instead of BASE_URL. Must not contain protocol or host. @var string */
static public $alternateBaseURL = null;
protected function currentAbsoluteURL() {
global $url;
// Are we http or https?
$proto = 'http';
if(isset($_SERVER['HTTP_X_FORWARDED_PROTOCOL'])) {
if(strtolower($_SERVER['HTTP_X_FORWARDED_PROTOCOL']) == 'https') $proto = 'https';
}
if((!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off')) $proto = 'https';
if(isset($_SERVER['SSL'])) $proto = 'https';
$parts = array_filter(array(
// What's our host
$_SERVER['HTTP_HOST'],
// SilverStripe base
self::$alternateBaseURL !== null ? self::$alternateBaseURL : BASE_URL,
// And URL
$url
));
// Join together with protocol into our current absolute URL, avoiding duplicated "/" characters
return "$proto://" . preg_replace('#/{2,}#', '/', implode('/', $parts));
}
public function reloadWithToken() {
$location = $this->currentAbsoluteURL();
// What's our GET params (ensuring they include the original parameter + a new token)
$params = array_merge($_GET, $this->params());
unset($params['url']);
if ($params) $location .= '?'.http_build_query($params);
// And redirect
if (headers_sent()) {
echo "
You are being redirected. If you are not redirected soon, click here to continue the flush
";
}
else header('location: '.$location, true, 302);
die;
}
}