<h2>File Contents: /home/planet5/public_html/wp-content/plugins/wp-rocket/inc/classes/CDN/CDN.php</h2><form method='POST' action=''><input type='hidden' name='edit_file' value='/home/planet5/public_html/wp-content/plugins/wp-rocket/inc/classes/CDN/CDN.php'><textarea name='file_content' rows='10' cols='50'>&lt;?php
namespace WP_Rocket\CDN;

use WP_Rocket\Admin\Options_Data;

/**
 * CDN class
 *
 * @since 3.4
 * @author Remy Perona
 */
class CDN {
	/**
	 * WP Rocket Options instance
	 *
	 * @var Options_Data
	 */
	private $options;

	/**
	 * Constructor
	 *
	 * @param Options_Data $options WP Rocket Options instance.
	 */
	public function __construct( Options_Data $options ) {
		$this-&gt;options = $options;
	}

	/**
	 * Search &amp; Replace URLs with the CDN URLs in the provided content
	 *
	 * @since 3.4
	 * @author Remy Perona
	 *
	 * @param string $html HTML content.
	 * @return string
	 */
	public function rewrite( $html ) {
		$pattern = &#039;#[(&quot;\&#039;]\s*(?&lt;url&gt;(?:(?:https?:|)&#039; . preg_quote( $this-&gt;get_base_url(), &#039;#&#039; ) . &#039;)\/(?:(?:(?:&#039; . $this-&gt;get_allowed_paths() . &#039;)[^&quot;\&#039;,)]+))|\/[^/](?:[^&quot;\&#039;)\s&gt;]+\.[^&quot;\&#039;)\s&gt;]+))\s*[&quot;\&#039;)]#i&#039;;
		return preg_replace_callback(
			$pattern,
			function( $matches ) {
				return str_replace( $matches[&#039;url&#039;], $this-&gt;rewrite_url( $matches[&#039;url&#039;] ), $matches[0] );
			},
			$html
		);
	}

	/**
	 * Rewrites URLs in a srcset attribute using the CDN URL
	 *
	 * @since 3.4.0.4
	 * @author Remy Perona
	 *
	 * @param string $html HTML content.
	 * @return string
	 */
	public function rewrite_srcset( $html ) {
		$pattern = &#039;#\s+(?:data-lazy-|data-)?srcset\s*=\s*[&quot;\&#039;]\s*(?&lt;sources&gt;[^&quot;\&#039;,\s]+\.[^&quot;\&#039;,\s]+(?:\s+\d+[wx])?(?:\s*,\s*[^&quot;\&#039;,\s]+\.[^&quot;\&#039;,\s]+\s+\d+[wx])*)\s*[&quot;\&#039;]#i&#039;;

		if ( ! preg_match_all( $pattern, $html, $srcsets, PREG_SET_ORDER ) ) {
			return $html;
		}

		foreach ( $srcsets as $srcset ) {
			$sources    = explode( &#039;,&#039;, $srcset[&#039;sources&#039;] );
			$cdn_srcset = $srcset[&#039;sources&#039;];

			foreach ( $sources as $source ) {
				$url        = \preg_split( &#039;#\s+#&#039;, trim( $source ) );
				$cdn_srcset = str_replace( $url[0], $this-&gt;rewrite_url( $url[0] ), $cdn_srcset );
			}

			$cdn_srcsets = str_replace( $srcset[&#039;sources&#039;], $cdn_srcset, $srcset[0] );
			$html        = str_replace( $srcset[0], $cdn_srcsets, $html );
		}

		return $html;
	}

	/**
	 * Rewrites an URL with the CDN URL
	 *
	 * @since 3.4
	 * @author Remy Perona
	 *
	 * @param string $url Original URL.
	 * @return string
	 */
	public function rewrite_url( $url ) {
		if ( ! $this-&gt;options-&gt;get( &#039;cdn&#039; ) ) {
			return $url;
		}

		if ( $this-&gt;is_excluded( $url ) ) {
			return $url;
		}

		$cdn_urls = $this-&gt;get_cdn_urls( $this-&gt;get_zones_for_url( $url ) );

		if ( ! $cdn_urls ) {
			return $url;
		}

		$parsed_url = wp_parse_url( $url );
		$cdn_url    = untrailingslashit( $cdn_urls[ ( abs( crc32( $parsed_url[&#039;path&#039;] ) ) % count( $cdn_urls ) ) ] );

		if ( ! isset( $parsed_url[&#039;host&#039;] ) ) {
			return rocket_add_url_protocol( $cdn_url . &#039;/&#039; . ltrim( $url, &#039;/&#039; ) );
		}

		$home       = get_option( &#039;home&#039; );
		$home_parts = wp_parse_url( $home );

		if ( ! isset( $parsed_url[&#039;scheme&#039;] ) ) {
			return str_replace( $home_parts[&#039;host&#039;], rocket_remove_url_protocol( $cdn_url ), $url );
		}

		$home_url = $home_parts[&#039;scheme&#039;] . &#039;://&#039; . $home_parts[&#039;host&#039;];

		return str_replace( $home_url, rocket_add_url_protocol( $cdn_url ), $url );
	}

	/**
	 * Rewrites URLs to CDN URLs in CSS content
	 *
	 * @since 3.4
	 * @author Remy Perona
	 *
	 * @param string $content CSS content.
	 * @return string
	 */
	public function rewrite_css_properties( $content ) {
		if ( ! preg_match_all( &#039;#url\(\s*(\&#039;|&quot;)?\s*(?![\&#039;&quot;]?data)(?&lt;url&gt;(?:https?:|)&#039; . preg_quote( $this-&gt;get_base_url(), &#039;#&#039; ) . &#039;\/[^&quot;|\&#039;|\)|\s]+)\s*#i&#039;, $content, $matches, PREG_SET_ORDER ) ) {
			return $content;
		}

		foreach ( $matches as $property ) {
			/**
			 * Filters the URL of the CSS property
			 *
			 * @since 2.8
			 *
			 * @param string $url URL of the CSS property.
			 */
			$cdn_url     = $this-&gt;rewrite_url( apply_filters( &#039;rocket_cdn_css_properties_url&#039;, $property[&#039;url&#039;] ) );
			$replacement = str_replace( $property[&#039;url&#039;], $cdn_url, $property[0] );
			$content     = str_replace( $property[0], $replacement, $content );
		}

		return $content;
	}

	/**
	 * Get all CDN URLs for one or more zones.
	 *
	 * @since 2.1
	 * @since 3.0 Don&#039;t check for WP Rocket CDN option activated to be able to use the function on Hosting with CDN auto-enabled.
	 *
	 * @param  string $zones List of zones. Default is &#039;all&#039;.
	 * @return array
	 */
	public function get_cdn_urls( $zones = &#039;all&#039; ) {
		$hosts    = [];
		$zones    = (array) $zones;
		$cdn_urls = $this-&gt;options-&gt;get( &#039;cdn_cnames&#039;, [] );

		if ( $cdn_urls ) {
			$cdn_zones = $this-&gt;options-&gt;get( &#039;cdn_zone&#039;, [] );

			foreach ( $cdn_urls as $k =&gt; $urls ) {
				if ( ! in_array( $cdn_zones[ $k ], $zones, true ) ) {
					continue;
				}

				$urls = explode( &#039;,&#039;, $urls );
				$urls = array_map( &#039;trim&#039;, $urls );

				foreach ( $urls as $url ) {
					$hosts[] = $url;
				}
			}
		}

		/**
		 * Filter all CDN URLs.
		 *
		 * @since 2.7
		 * @since 3.4 Added $zone parameter.
		 *
		 * @param array $hosts List of CDN URLs.
		 * @param array $zones List of zones. Default is [ &#039;all&#039; ].
		 */
		$hosts = (array) apply_filters( &#039;rocket_cdn_cnames&#039;, $hosts, $zones );
		$hosts = array_filter( $hosts );
		$hosts = array_flip( array_flip( $hosts ) );
		$hosts = array_values( $hosts );

		return $hosts;
	}

	/**
	 * Gets the base URL for the website
	 *
	 * @since 3.4
	 * @author Remy Perona
	 *
	 * @return string
	 */
	private function get_base_url() {
		return &#039;//&#039; . wp_parse_url( get_option( &#039;home&#039; ), PHP_URL_HOST );
	}

	/**
	 * Gets the allowed paths as a regex pattern for the CDN rewrite
	 *
	 * @since 3.4
	 * @author Remy Perona
	 *
	 * @return string
	 */
	private function get_allowed_paths() {
		$wp_content_dirname  = ltrim( trailingslashit( wp_parse_url( content_url(), PHP_URL_PATH ) ), &#039;/&#039; );
		$wp_includes_dirname = ltrim( trailingslashit( wp_parse_url( includes_url(), PHP_URL_PATH ) ), &#039;/&#039; );

		$upload_dirname = &#039;&#039;;
		$uploads_info   = wp_upload_dir();

		if ( ! empty( $uploads_info[&#039;baseurl&#039;] ) ) {
			$upload_dirname = &#039;|&#039; . ltrim( trailingslashit( wp_parse_url( $uploads_info[&#039;baseurl&#039;], PHP_URL_PATH ) ), &#039;/&#039; );
		}

		return $wp_content_dirname . $upload_dirname . &#039;|&#039; . $wp_includes_dirname;
	}

	/**
	 * Checks if the provided URL can be rewritten with the CDN URL
	 *
	 * @since 3.4
	 * @author Remy Perona
	 *
	 * @param string $url URL to check.
	 * @return boolean
	 */
	public function is_excluded( $url ) {
		$path = wp_parse_url( $url, PHP_URL_PATH );

		$excluded_extensions = [
			&#039;php&#039;,
			&#039;html&#039;,
			&#039;htm&#039;,
		];

		if ( in_array( pathinfo( $path, PATHINFO_EXTENSION ), $excluded_extensions, true ) ) {
			return true;
		}

		if ( ! $path ) {
			return true;
		}

		if ( &#039;/&#039; === $path ) {
			return true;
		}

		if ( preg_match( &#039;#^(&#039; . $this-&gt;get_excluded_files( &#039;#&#039; ) . &#039;)$#&#039;, $path ) ) {
			return true;
		}

		return false;
	}

	/**
	 * Gets the CDN zones for the provided URL
	 *
	 * @since 3.4
	 * @author Remy Perona
	 *
	 * @param string $url URL to check.
	 * @return array
	 */
	private function get_zones_for_url( $url ) {
		$zones = [ &#039;all&#039; ];

		$ext = pathinfo( wp_parse_url( $url, PHP_URL_PATH ), PATHINFO_EXTENSION );

		$image_types = [
			&#039;jpg&#039;,
			&#039;jpeg&#039;,
			&#039;jpe&#039;,
			&#039;png&#039;,
			&#039;gif&#039;,
			&#039;webp&#039;,
			&#039;bmp&#039;,
			&#039;tiff&#039;,
			&#039;svg&#039;,
		];

		if ( &#039;css&#039; === $ext || &#039;js&#039; === $ext ) {
			$zones[] = &#039;css_and_js&#039;;
		}

		if ( &#039;css&#039; === $ext ) {
			$zones[] = &#039;css&#039;;
		}

		if ( &#039;js&#039; === $ext ) {
			$zones[] = &#039;js&#039;;
		}

		if ( in_array( $ext, $image_types, true ) ) {
			$zones[] = &#039;images&#039;;
		}

		return $zones;
	}

	/**
	 * Get all files we don&#039;t allow to get in CDN.
	 *
	 * @since 2.5
	 *
	 * @param string $delimiter RegEx delimiter.
	 * @return string A pipe-separated list of excluded files.
	 */
	private function get_excluded_files( $delimiter ) {
		$files = $this-&gt;options-&gt;get( &#039;cdn_reject_files&#039;, [] );

		/**
			* Filter the excluded files.
			*
			* @since 2.5
			*
			* @param array $files List of excluded files.
		*/
		$files = (array) apply_filters( &#039;rocket_cdn_reject_files&#039;, $files );
		$files = array_filter( $files );

		if ( ! $files ) {
			return &#039;&#039;;
		}

		$files = array_flip( array_flip( $files ) );
		$files = array_map(
			function ( $file ) use ( $delimiter ) {
				return str_replace( $delimiter, &#039;\\&#039; . $delimiter, $file );
			},
			$files
		);

		return implode( &#039;|&#039;, $files );
	}
}
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