function varnish_purge_paths in Varnish 7

Same name and namespace in other branches

1. 8 varnish.module \varnish_purge_paths()

Helper function that wraps around varnish_purge().

Compiles a regular expression of all paths supplied to it. This function takes care to chunk commands into no more than 7500 bytes each, to avoid hitting params.cli_buffer.

Parameters

string $host: The host to purge.

array $paths: The paths (no leading slash) to purge for this host.

1 call to varnish_purge_paths()

varnish_expire_cache in ./varnish.module

Implements hook_expire_cache().

File

./varnish.module, line 219

Common functions used for the module.

Code

function varnish_purge_paths($host, array $paths) {

  // Subtract the hostname length from the global length limit.
  // Note we use strlen() because we're counting bytes, not characters.
  $length_limit = variable_get('varnish_cmdlength_limit', 7500) - strlen($host);
  $base_path = base_path();
  while (!empty($paths)) {

    // Construct patterns and send them to the server when they're full.
    $purge_pattern = '^';
    while (strlen($purge_pattern) < $length_limit && !empty($paths)) {
      $purge_pattern .= $base_path . array_shift($paths) . '$|^';
    }

    // Chop the final "|^" off the string, leaving "$".
    $purge_pattern = substr($purge_pattern, 0, -2);

    // Remove extra slashes in beginning of URL.
    $purge_pattern = preg_replace('#/+#', '/', $purge_pattern);

    // Submit this purge chunk.
    varnish_purge($host, $purge_pattern);
  }
}