ClientFactory::fromOptions

public ClientFactory::fromOptions(array $config = [])

public function fromOptions(array $config = []) {
  $default_config = [
    // Security consideration: we must not use the certificate authority
    // file shipped with Guzzle because it can easily get outdated if a
    // certificate authority is hacked. Instead, we rely on the certificate
    // authority file provided by the operating system which is more likely
    // going to be updated in a timely fashion. This overrides the default
    // path to the pem file bundled with Guzzle.
    'verify' => TRUE,
    'timeout' => 30,
    'headers' => [
      'User-Agent' => 'Drupal/' . \Drupal::VERSION . ' (+https://www.drupal.org/) ' . \GuzzleHttp\default_user_agent(),
    ],
    'handler' => $this->stack,
    // Security consideration: prevent Guzzle from using environment variables
    // to configure the outbound proxy.
    'proxy' => [
      'http' => NULL,
      'https' => NULL,
      'no' => [],
    ]
  ];

  $config = NestedArray::mergeDeep($default_config, Settings::get('http_client_config', []), $config);

  return new Client($config);
}