How to set curl options

Hi @ wrd-oaitsd
sorry for the huge delay.

You can achieve what you want by adding options to your "Http Services Api" definition via *.http_services_api.yml file.
sorry for the huge delay.
You can achieve what you want by adding options to your "Http Services Api" definition via "*.http_services_ api.yaml" file.
Take a look at the example implementation here https://git.drupalcode.org/project/http_client_manager/-/blob/10.x/modules/http_client_manager_example/http_client_manager_example.http_services_api.yml?

You can add any custom value like these:

example_services:
  title: "[JSON] - Example Services fake API"
  api_path: "src/api/example_services.json"
  config:
    base_uri: "http://jsonplaceholder.typicode.com"
    curl:
      'CURLOPT_SSL_VERIFYPEER': true
      'CURLOPT_CAINFO': "/path/to/cacert.pem"

You can also achieve the same result by entering extra configurations in the configuration form at 'admin/config/services/http-client-manager/settings':

But if you have more complex needs you can exploit the "onHandlerStack" event, see the example here: https://git.drupalcode.org/project/http_client_manager/-/blob/10.x/modules/http_client_manager_example/src/EventSubscriber/HttpClientManagerExampleSubscriber.php

You can create your own EventSuscriber where you can override the handler as you wish:

  /**
   * This method is called whenever the http_client.handler_stack event is
   * dispatched.
   *
   * @param \Drupal\http_client_manager\Event\HttpClientHandlerStackEvent $event
   *   The HTTP Client Handler stack event.
   */
  public function onHandlerStack(HttpClientHandlerStackEvent $event) {
    if ($event->getHttpServiceApi() != 'example_services') {
      return;
    }

    $stack = $event->getHandlerStack();
    $stack->setHandler(new CustomCurlHandler());
  }

where CustomCurlHandler is defined like that:

declare(strict_types=1);

namespace Drupal\your_custom_module;

use GuzzleHttp\Handler\CurlHandler;
use GuzzleHttp\Promise\PromiseInterface;
use Psr\Http\Message\RequestInterface;

class CustomCurlHandler extends CurlHandler {

  /**
   * @param RequestInterface $request
   * @param array $options
   * @return PromiseInterface
   */
  public function __invoke(RequestInterface $request, array $options): PromiseInterface
  {
    // Change cURL options here
    $options['curl'][CURLOPT_SSL_VERIFYPEER] = false;
    $options['curl'][CURLOPT_TIMEOUT] = 666;

    return parent::__invoke($request, $options);
  }
}

Thanks @emanuelrighetto for your support.

Regards,
aronne