function advagg_missing_set_farfuture_headers in Advanced CSS/JS Aggregation 7.2

Set various headers so the browser will cache the file for a long time.

1 call to advagg_missing_set_farfuture_headers()

advagg_missing_send_saved_file in ./advagg.missing.inc

Send the css/js file to the client.

File

./advagg.missing.inc, line 373

Advanced CSS/JS aggregation module.

Code

function advagg_missing_set_farfuture_headers() {

  // Hat tip to the CDN module for the far future headers.
  //
  // Browsers that implement the W3C Access Control specification might refuse
  // to use certain resources such as fonts if those resources violate the
  // same-origin policy. Send a header to explicitly allow cross-domain use of
  // those resources. This is called Cross-Origin Resource Sharing, or CORS.
  header("Access-Control-Allow-Origin: *");

  // Remove all previously set Cache-Control headers, because we're going to
  // override it. Since multiple Cache-Control headers might have been set,
  // simply setting a new, overriding header isn't enough: that would only
  // override the *last* Cache-Control header. Yay for PHP!
  if (function_exists('header_remove')) {
    header_remove('Cache-Control');
    header_remove('ETag');
    header_remove('Set-Cookie');
  }
  else {
    header('Cache-Control:');
    header('Cache-Control:');
    header('ETag:');
    header('ETag:');
    header('Set-Cookie:');
    header('Set-Cookie:');
  }

  // Set a far future Cache-Control header (52 weeks), which prevents
  // intermediate caches from transforming the data and allows any
  // intermediate cache to cache it, since it's marked as a public resource.
  if (variable_get('advagg_resource_hints_use_immutable', ADVAGG_RESOURCE_HINTS_USE_IMMUTABLE)) {
    header('Cache-Control: max-age=31449600, public, immutable');
  }
  else {
    header('Cache-Control: max-age=31449600, public');
  }
}