public function TestHttpClientMiddleware::__invoke in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Test/HttpClientMiddleware/TestHttpClientMiddleware.php \Drupal\Core\Test\HttpClientMiddleware\TestHttpClientMiddleware::__invoke()
2. 10 core/lib/Drupal/Core/Test/HttpClientMiddleware/TestHttpClientMiddleware.php \Drupal\Core\Test\HttpClientMiddleware\TestHttpClientMiddleware::__invoke()

HTTP middleware that replaces the user agent for simpletest requests.

File

core/lib/Drupal/Core/Test/HttpClientMiddleware/TestHttpClientMiddleware.php, line 19

Class

TestHttpClientMiddleware

Overrides the User-Agent HTTP header for outbound HTTP requests.

Namespace

Drupal\Core\Test\HttpClientMiddleware

Code

public function __invoke() {

  // If the database prefix is being used by SimpleTest to run the tests in a copied
  // database then set the user-agent header to the database prefix so that any
  // calls to other Drupal pages will run the SimpleTest prefixed database. The
  // user-agent is used to ensure that multiple testing sessions running at the
  // same time won't interfere with each other as they would if the database
  // prefix were stored statically in a file or database variable.
  return function ($handler) {
    return function (RequestInterface $request, array $options) use ($handler) {
      if ($test_prefix = drupal_valid_test_ua()) {
        $request = $request
          ->withHeader('User-Agent', drupal_generate_test_ua($test_prefix));
      }
      return $handler($request, $options)
        ->then(function (ResponseInterface $response) use ($request) {
        if (!drupal_valid_test_ua()) {
          return $response;
        }
        $headers = $response
          ->getHeaders();
        foreach ($headers as $header_name => $header_values) {
          if (preg_match('/^X-Drupal-Assertion-[0-9]+$/', $header_name, $matches)) {
            foreach ($header_values as $header_value) {

              // Call \Drupal\simpletest\WebTestBase::error() with the parameters from
              // the header.
              $parameters = unserialize(urldecode($header_value));
              if (count($parameters) === 3) {
                if ($parameters[1] === 'User deprecated function') {

                  // Fire the same deprecation message to allow it to be
                  // collected by
                  // \Symfony\Bridge\PhpUnit\DeprecationErrorHandler::collectDeprecations().
                  @trigger_error((string) $parameters[0], E_USER_DEPRECATED);
                }
                else {
                  throw new \Exception($parameters[1] . ': ' . $parameters[0] . "\n" . Error::formatBacktrace([
                    $parameters[2],
                  ]));
                }
              }
              else {
                throw new \Exception('Error thrown with the wrong amount of parameters.');
              }
            }
          }
        }
        return $response;
      });
    };
  };
}