add wp-rocket

wp-content/plugins/wp-rocket/inc/Addon/Varnish/Varnish.php

@@ -0,0 +1,129 @@
+<?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;
+	}
+}