/**
* Get Scheme (https or http)
*
* @return string
* @api
*/
public function getScheme()
{
$isHttps = false;
if ($this->headers->has('X_FORWARDED_PROTO') === true) {
$headerValue = $this->headers->get('X_FORWARDED_PROTO');
$isHttps = strtolower($headerValue) === 'https';
} else {
$headerValue = $this->env->get('HTTPS');
$isHttps = empty($headerValue) === false && $headerValue !== 'off';
}
return $isHttps ? 'https' : 'http';
}
/**
* Does this request have a given header?
*
* @param string $name
* @return bool
* @api
*/
public function hasHeader($name)
{
return $this->headers->has($name);
}
/**
* Delete HTTP cookie header
*
* This method will construct and set the HTTP `Set-Cookie` header to invalidate
* a client-side HTTP cookie. If a cookie with the same name (and, optionally, domain)
* is already set in the HTTP response, it will also be removed. Slim uses this method
* instead of PHP's native `setcookie` method. This allows more control of the HTTP header
* irrespective of PHP's native implementation's dependency on PHP versions.
*
* This method accepts the \Slim\Http\Headers object by reference as its
* first argument; this method directly modifies this object instead of
* returning a value.
*
* @param \Slim\Interfaces\Http\HeadersInterface $headers
* @param string $name
* @param array $value
* @api
*/
public function deleteHeader(HeadersInterface &$headers, $name, $value = array())
{
$crumbs = $headers->has('Set-Cookie') ? explode("\n", $headers->get('Set-Cookie')) : array();
$cookies = array();
foreach ($crumbs as $crumb) {
if (isset($value['domain']) && $value['domain']) {
$regex = sprintf('@%s=.*domain=%s@', urlencode($name), preg_quote($value['domain']));
} else {
$regex = sprintf('@%s=@', urlencode($name));
}
if (preg_match($regex, $crumb) === 0) {
$cookies[] = $crumb;
}
}
if (!empty($cookies)) {
$headers->set('Set-Cookie', implode("\n", $cookies));
} else {
$headers->remove('Set-Cookie');
}
$this->setHeader($headers, $name, array_merge(array('value' => '', 'path' => null, 'domain' => null, 'expires' => time() - 100), $value));
}
