How to use TrustedRedirectResponse()?

Question

I have used the following code on submit of a form to first send the form contents via guzzle and then redirect the form. I get the error

Error: Call to undefined function TrustedRedirectResponse()

this is my code:

use Drupal\Core\Routing\TrustedRedirectResponse;

function mymodule_submit(&$form, FormStateInterface $form_state){
$url="xyz.com";
$post_data=array("color"=>"red");

$client = \Drupal::httpClient();
  $response = $client->request('POST', $url, [
    'headers' => ['Content-Type' => 'application/x-www-form-urlencoded'],
     'verify'=>false,
    'form_params' => $post_data,

     ]);
    $status = $response->getStatusCode();

    $response = TrustedRedirectResponse(Url::fromUri($url));
    $form_state->setResponse($response);
}

I have two questions - how can I avoid the error , and is the order of getting the guzzle response and then getting the redirect response the correct order?

Answer 1

Your order seems correct, you need to instanciate a new TrustedRedirectResponse object like:

$response = new TrustedRedirectResponse($url_string);

Answer 2

The client->request is then unnecessary

 function my_module_submit(&$form, FormStateInterface $form_state) {
      $block = Block::load('bid');
      $block_settings = $block->get('settings');
      $url = $block_settings['url'];
      $query=$form_state->getValue('search_query');
      if (!empty($query)) {
        $url .= $query;
      }
      $response = new TrustedRedirectResponse($url);
      $form_state->setResponse($response);
    }