/**
* Redirects the browser to the specified URL.
*
* This method adds a "Location" header to the current response. Note that it does not send out
* the header until {@see \rock\response\Response::send()} is called. In a controller action you may use this method as follows:
*
* ```php
* return Rock::$app->response->redirect($url);
* ```
*
* In other places, if you want to send out the "Location" header immediately, you should use
* the following code:
*
* ```php
* Rock::$app->response->redirect($url)->send();
* return;
* ```
*
* In AJAX mode, this normally will not work as expected unless there are some
* client-side JavaScript code handling the redirection. To help achieve this goal,
* this method will send out a "X-Redirect" header instead of "Location".
*
* If you use the "rock" JavaScript module, it will handle the AJAX redirection as
* described above. Otherwise, you should write the following JavaScript code to
* handle the redirection:
*
* ```js
* $httpProvider.defaults.headers.common['X-Requested-With'] = 'XMLHttpRequest'
* ```
*
* @param string $url the URL to be redirected to. This can be in one of the following formats:
*
* - a string representing a URL (e.g. "http://example.com")
* - a string representing a URL alias (e.g. "@example.com")
*
* Any relative URL will be converted into an absolute one by prepending it with the host info
* of the current request.
*
* @param integer $statusCode the HTTP status code. Defaults to 302.
* See @link http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
* for details about HTTP status code
* @param boolean $checkAjax whether to specially handle AJAX (and PJAX) requests. Defaults to true,
* meaning if the current request is an AJAX or PJAX request, then calling this method will cause the browser
* to redirect to the given URL. If this is false, a `Location` header will be sent, which when received as
* an AJAX/PJAX response, may NOT cause browser redirection.
* @return static the response object itself
*/
public function redirect($url, $statusCode = 302, $checkAjax = true)
{
if (strpos($url, '/') === 0 && strpos($url, '//') !== 0) {
$url = $this->request->getHostInfo() . $url;
}
if ($checkAjax) {
if ($this->request->isPjax()) {
$this->getHeaders()->set('X-Pjax-Url', $url);
} elseif ($this->request->isAjax()) {
$this->getHeaders()->set('X-Redirect', $url);
} else {
$this->getHeaders()->set('Location', $url);
}
} else {
$this->getHeaders()->set('Location', $url);
}
$this->setStatusCode($statusCode);
return $this;
}