public function Esi::process

Replaces a Response ESI tags with the included resource content.

Parameters

Request $request A Request instance:

Response $response A Response instance:

Return value

Response

File

drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/HttpCache/Esi.php, line 146

Class

Esi

Esi implements the ESI capabilities to Request and Response instances.

Namespace

Code

public function process(Request $request, Response $response) {
  $this->request = $request;
  $type = $response->headers
    ->get('Content-Type');
  if (empty($type)) {
    $type = 'text/html';
  }
  $parts = explode(';', $type);
  if (!in_array($parts[0], $this->contentTypes)) {
    return $response;
  }

  // we don't use a proper XML parser here as we can have ESI tags in a plain text response
  $content = $response
    ->getContent();
  $content = str_replace(array(
    '<?',
    '<%',
  ), array(
    '<?php echo "<?"; ?>',
    '<?php echo "<%"; ?>',
  ), $content);
  $content = preg_replace_callback('#<esi\\:include\\s+(.*?)\\s*(?:/|</esi\\:include)>#', array(
    $this,
    'handleEsiIncludeTag',
  ), $content);
  $content = preg_replace('#<esi\\:comment[^>]*(?:/|</esi\\:comment)>#', '', $content);
  $content = preg_replace('#<esi\\:remove>.*?</esi\\:remove>#', '', $content);
  $response
    ->setContent($content);
  $response->headers
    ->set('X-Body-Eval', 'ESI');

  // remove ESI/1.0 from the Surrogate-Control header
  if ($response->headers
    ->has('Surrogate-Control')) {
    $value = $response->headers
      ->get('Surrogate-Control');
    if ('content="ESI/1.0"' == $value) {
      $response->headers
        ->remove('Surrogate-Control');
    }
    elseif (preg_match('#,\\s*content="ESI/1.0"#', $value)) {
      $response->headers
        ->set('Surrogate-Control', preg_replace('#,\\s*content="ESI/1.0"#', '', $value));
    }
    elseif (preg_match('#content="ESI/1.0",\\s*#', $value)) {
      $response->headers
        ->set('Surrogate-Control', preg_replace('#content="ESI/1.0",\\s*#', '', $value));
    }
  }
}