installed plugin W3 Total Cache version 2.3.2

wp-content/plugins/w3-total-cache/Extension_ImageService_Environment.php

@@ -0,0 +1,202 @@
+<?php
+/**
+ * File: Extension_ImageService_Environment.php
+ *
+ * @since 2.2.0
+ *
+ * @package W3TC
+ */
+
+namespace W3TC;
+
+/**
+ * Class: Extension_ImageService_Environment
+ */
+class Extension_ImageService_Environment {
+	/**
+	 * Fixes environment in each wp-admin request.
+	 *
+	 * @since 2.2.0
+	 *
+	 * @param Config $config           Configuration.
+	 * @param bool   $force_all_checks Force all checks.
+	 * @throws Util_Environment_Exceptions Exceptions.
+	 */
+	public function fix_on_wpadmin_request( $config, $force_all_checks ) {
+		$exs = new Util_Environment_Exceptions();
+
+		if ( $config->get_boolean( 'config.check' ) || $force_all_checks ) {
+			$extensions_active = $config->get_array( 'extensions.active' );
+
+			if ( array_key_exists( 'imageservice', $extensions_active ) ) {
+				$this->rules_add( $config, $exs );
+			} else {
+				$this->rules_remove( $exs );
+			}
+		}
+
+		if ( count( $exs->exceptions() ) > 0 ) {
+			throw $exs;
+		}
+	}
+
+	/**
+	 * Fixes environment once event occurs.
+	 *
+	 * @since 2.2.0
+	 *
+	 * @param Config $config     Config object.
+	 * @param mixed  $event      Event.
+	 * @param Config $old_config Old config object.
+	 */
+	public function fix_on_event( $config, $event, $old_config = null ) {
+	}
+
+	/**
+	 * Fixes environment after plugin deactivation
+	 *
+	 * @since 2.2.0
+	 *
+	 * @throws Util_Environment_Exceptions Exceptions.
+	 */
+	public function fix_after_deactivation() {
+		$exs = new Util_Environment_Exceptions();
+
+		$this->rules_remove( $exs );
+
+		if ( count( $exs->exceptions() ) > 0 ) {
+			throw $exs;
+		}
+	}
+
+	/**
+	 * Returns required rules for module.
+	 *
+	 * @since 2.2.0
+	 *
+	 * @param Config $config Configuration object.
+	 * @return array
+	 */
+	public function get_required_rules( $config ) {
+		return array(
+			array(
+				'filename' => Util_Rule::get_browsercache_rules_cache_path(),
+				'content'  => $this->rules_generate(),
+			),
+		);
+	}
+
+	/**
+	 * Write rewrite rules.
+	 *
+	 * @since 2.2.0
+	 *
+	 * @param Config                      $config Configuration.
+	 * @param Util_Environment_Exceptions $exs    Exceptions.
+	 *
+	 * @throws Util_WpFile_FilesystemOperationException S/FTP form if it can't get the required filesystem credentials.
+	 */
+	private function rules_add( $config, $exs ) {
+		Util_Rule::add_rules(
+			$exs,
+			Util_Rule::get_browsercache_rules_cache_path(),
+			$this->rules_generate(),
+			W3TC_MARKER_BEGIN_WEBP,
+			W3TC_MARKER_END_WEBP,
+			array(
+				W3TC_MARKER_BEGIN_BROWSERCACHE_CACHE => 0,
+				W3TC_MARKER_BEGIN_WORDPRESS          => 0,
+			)
+		);
+	}
+
+	/**
+	 * Generate rewrite rules.
+	 *
+	 * @since 2.2.0
+	 *
+	 * @see Dispatcher::nginx_rules_for_browsercache_section()
+	 *
+	 * @return string
+	 */
+	private function rules_generate() {
+		switch ( true ) {
+			case Util_Environment::is_apache():
+			case Util_Environment::is_litespeed():
+				return '
+# BEGIN W3TC WEBP
+<IfModule mod_rewrite.c>
+    RewriteEngine On
+    RewriteCond %{HTTP_ACCEPT} image/webp
+    RewriteCond %{REQUEST_FILENAME} (.+)\.(jpe?g|png|gif)$
+    RewriteCond %1\.webp -f
+    RewriteCond %{QUERY_STRING} !type=original
+    RewriteRule (.+)\.(jpe?g|png|gif)$ $1.webp [NC,T=image/webp,E=webp,L]
+</IfModule>
+<IfModule mod_headers.c>
+    <FilesMatch "\.(jpe?g|png|gif)$">
+        Header append Vary Accept
+    </FilesMatch>
+</IfModule>
+AddType image/webp .webp
+# END W3TC WEBP
+
+';
+
+			case Util_Environment::is_nginx():
+				$config = Dispatcher::config();
+
+				/*
+				 * Add Nginx rules only if Browser Cache is disabled.
+				 * Otherwise, the rules are added in "BrowserCache_Environment_Nginx.php".
+				 * @see BrowserCache_Environment_Nginx::generate_section()
+				 */
+				if ( ! $config->get_boolean( 'browsercache.enabled' ) ) {
+					if ( $config->get_boolean( 'browsercache.no404wp' ) ) {
+						$fallback = '=404';
+					} else {
+						$fallback = '/index.php?$args';
+					}
+
+					return '
+# BEGIN W3TC WEBP
+location ~* ^(?<path>.+)\.(jpe?g|png|gif)$ {
+    if ( $http_accept !~* "webp|\*/\*" ) {
+        break;
+    }
+
+    ' . implode( "\n    ", Dispatcher::nginx_rules_for_browsercache_section( $config, 'other' ) ) . '
+
+    add_header Vary Accept;
+    try_files ${path}.webp $uri ' . $fallback . ';
+}
+# END W3TC WEBP
+
+';
+				} else {
+					return '';
+				}
+
+			default:
+				return '';
+		}
+	}
+
+	/**
+	 * Removes cache directives
+	 *
+	 * @since 2.2.0
+	 *
+	 * @param Util_Environment_Exceptions $exs Exceptions.
+	 *
+	 * @throws Util_WpFile_FilesystemOperationException S/FTP form if it can't get the required filesystem credentials.
+	 */
+	private function rules_remove( $exs ) {
+		Util_Rule::remove_rules(
+			$exs,
+			Util_Rule::get_pgcache_rules_core_path(),
+			W3TC_MARKER_BEGIN_WEBP,
+			W3TC_MARKER_END_WEBP
+		);
+	}
+}