晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Directory :  /home/rainic/public_html/oldTZh/wp-content/plugins/wp-rocket/inc/Addon/Varnish/

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Current File : //home/rainic/public_html/oldTZh/wp-content/plugins/wp-rocket/inc/Addon/Varnish/Subscriber.php
<?php
namespace WP_Rocket\Addon\Varnish;

use WP_Rocket\Admin\Options_Data;
use WP_Rocket\Event_Management\Subscriber_Interface;

/**
 * Subscriber for the Varnish Purge.
 *
 * @since 3.5
 */
class Subscriber implements Subscriber_Interface {
	/**
	 * Varnish instance
	 *
	 * @var Varnish
	 */
	private $varnish;

	/**
	 * WP Rocket options instance
	 *
	 * @var Options_Data
	 */
	private $options;

	/**
	 * Constructor
	 *
	 * @param Varnish      $varnish Varnish instance.
	 * @param Options_Data $options WP Rocket options instance.
	 */
	public function __construct( Varnish $varnish, Options_Data $options ) {
		$this->varnish = $varnish;
		$this->options = $options;
	}

	/**
	 * {@inheritdoc}
	 */
	public static function get_subscribed_events() {
		return [
			'before_rocket_clean_domain'          => [ 'clean_domain', 10, 3 ],
			'before_rocket_clean_file'            => [ 'clean_file' ],
			'rocket_rucss_after_clearing_usedcss' => [ 'clean_file' ],
			'before_rocket_clean_home'            => [ 'clean_home', 10, 2 ],
			'rocket_rucss_complete_job_status'    => [ 'clean_file' ],
		];
	}

	/**
	 * Checks if Varnish cache should be purged
	 *
	 * @since 3.5
	 *
	 * @return bool
	 */
	private function should_purge() {
		return (
			/**
			 * Filters the use of the Varnish compatibility add-on
			 *
			 * @param bool $varnish_purge True to use, false otherwise.
			 */
			apply_filters( 'do_rocket_varnish_http_purge', false ) // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals
			||
			(bool) $this->options->get( 'varnish_auto_purge', 0 )
		);
	}

	/**
	 * Clears Varnish cache for the whole domain
	 *
	 * @param string $root The path of home cache file.
	 * @param string $lang The current lang to purge.
	 * @param string $url  The home url.
	 * @return void
	 */
	public function clean_domain( $root, $lang, $url ) {
		if ( ! $this->should_purge() ) {
			return;
		}

		$this->varnish->purge( trailingslashit( $url ) . '?regex' );
	}

	/**
	 * Clears a specific page in Varnish cache
	 *
	 * @param string $url The url to purge.
	 * @return void
	 */
	public function clean_file( $url ) {
		if ( ! $this->should_purge() ) {
			return;
		}

		$this->varnish->purge( trailingslashit( $url ) . '?regex' );
	}

	/**
	 * Clears the homepage in Varnish cache
	 *
	 * @param string $root The path of home cache file.
	 * @param string $lang The current lang to purge.
	 * @return void
	 */
	public function clean_home( $root, $lang ) {
		if ( ! $this->should_purge() ) {
			return;
		}

		$home_url            = trailingslashit( get_rocket_i18n_home_url( $lang ) );
		$home_pagination_url = $home_url . trailingslashit( $GLOBALS['wp_rewrite']->pagination_base ) . '?regex';

		$this->varnish->purge( $home_url );
		$this->varnish->purge( $home_pagination_url );
	}
}

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