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<?php
namespace WP_Rocket\Addon\Varnish;
/**
* Varnish cache purge
*
* @since 3.5
*/
class Varnish {
/**
* Send purge request to Varnish
*
* @since 3.5
*
* @param string $url The URL to purge.
* @return void
*/
public function purge( $url ) {
$parse_url = get_rocket_parse_url( $url );
$x_purge_method = 'default';
$regex = '';
if ( 'regex' === $parse_url['query'] ) {
$x_purge_method = 'regex';
$regex = '.*';
}
/**
* Filter the HTTP protocol (scheme)
*
* @since 2.7.3
* @param string $scheme The HTTP protocol
*/
$scheme = apply_filters( 'rocket_varnish_http_purge_scheme', 'http' );
/**
* Filters the headers to send with the Varnish purge request
*
* @since 3.1
*
* @param array $headers Headers to send.
*/
$headers = apply_filters(
'rocket_varnish_purge_headers',
[
/**
* Filters the host value passed in the request headers
*
* @since 2.8.15
* @param string $host The host value.
*/
'host' => apply_filters( 'rocket_varnish_purge_request_host', $parse_url['host'] ),
'X-Purge-Method' => $x_purge_method,
]
);
/**
* Filters the arguments passed to the Varnish purge request
*
* @since 3.5
*
* @param array $args Array of arguments for the request.
*/
$args = apply_filters(
'rocket_varnish_purge_request_args',
[
'method' => 'PURGE',
'blocking' => false,
'redirection' => 0,
'headers' => $headers,
]
);
foreach ( $this->get_varnish_ips() as $ip ) {
$host = ! empty( $ip ) ? $ip : str_replace( '*', '', $parse_url['host'] );
$purge_url_main = $scheme . '://' . $host . $parse_url['path'];
/**
* Filters the purge url.
*
* @since 3.6.3
*
* @param string $purge_url_full Full url contains the main url plus regex pattern.
* @param string $purge_url_main Main purge url without any additions params.
* @param string $regex Regex string.
*/
$purge_url = apply_filters(
'rocket_varnish_purge_url',
$purge_url_main . $regex,
$purge_url_main,
$regex
);
wp_remote_request( $purge_url, $args );
}
}
/**
* Gets an array of Varnish IPs to send the purge request to
*
* @return array
*/
private function get_varnish_ips() {
/**
* Filter the Varnish IP to call
*
* @since 2.6.8
* @param string|array $varnish_ip The Varnish IP
*/
$varnish_ip = apply_filters( 'rocket_varnish_ip', [] );
$constant = rocket_get_constant( 'WP_ROCKET_VARNISH_IP' );
if (
! empty( $constant )
&&
empty( $varnish_ip )
) {
$varnish_ip = $constant;
}
if ( empty( $varnish_ip ) ) {
$varnish_ip = [ '' ];
} elseif ( is_string( $varnish_ip ) ) {
$varnish_ip = (array) $varnish_ip;
}
return $varnish_ip;
}
}
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