I have data in custom response headers that I need to read. I have looked in the Drupal API guide and there is a reference to
Response::$headers, but I'm not sure how to exactly use this to read header data.
Edit - to further elaborate what I am trying to accomplish:
I have a form in a custom module that redirects some data in the headers to another page. Here is the code for that:
$response = new RedirectResponse('/path/destination', 302, array( "username" => "value" )); $response->send();
The redirect is made successfully and the values that I'm pushing to the headers (illustrated by "username" above) are successfully transferred onto the response headers - I can see that with the browser inspector.
What I am now trying to do is read the values of those custom headers, i.e. "username", as a means of pre-populating the username field on my destination page (/path/destination).
As suggested in the answers, I have also done the following:
$response = new ResponseHeaderBag(); $response::get("username");
I also tried:
$response = new ResponseHeaderBag(); $response->get("username", $default = null, $first = true);
Even though I have both these inclusions on the top of my file:
use Symfony\Component\HttpFoundation\HeaderBag; use Symfony\Component\HttpFoundation\ResponseHeaderBag;
I get the following error:
Fatal error: Call to undefined method Drupal\module_name\Form\MyClass::all() in ../vendor/symfony/http-foundation/HeaderBag.php on line 113