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Edit File: functions.photon.php
<?php use Automattic\Jetpack\Status; /** * Generic functions using the Photon service. * * Some are used outside of the Photon module being active, so intentionally not within the module. * * @package jetpack */ /** * Generates a Photon URL. * * @see https://developer.wordpress.com/docs/photon/ * * @param string $image_url URL to the publicly accessible image you want to manipulate. * @param array|string $args An array of arguments, i.e. array( 'w' => '300', 'resize' => array( 123, 456 ) ), or in string form (w=123&h=456). * @param string|null $scheme URL protocol. * @return string The raw final URL. You should run this through esc_url() before displaying it. */ function jetpack_photon_url( $image_url, $args = array(), $scheme = null ) { $image_url = trim( $image_url ); if ( ! defined( 'IS_WPCOM' ) || ! IS_WPCOM ) { /** * Disables Photon URL processing for local development * * @module photon * * @since 4.1.0 * * @param bool false Result of Automattic\Jetpack\Status->is_development_mode(). */ if ( true === apply_filters( 'jetpack_photon_development_mode', ( new Status() )->is_development_mode() ) ) { return $image_url; } } /** * Allow specific image URls to avoid going through Photon. * * @module photon * * @since 3.2.0 * * @param bool false Should the image be returned as is, without going through Photon. Default to false. * @param string $image_url Image URL. * @param array|string $args Array of Photon arguments. * @param string|null $scheme Image scheme. Default to null. */ if ( false !== apply_filters( 'jetpack_photon_skip_for_url', false, $image_url, $args, $scheme ) ) { return $image_url; } /** * Filter the original image URL before it goes through Photon. * * @module photon * * @since 1.9.0 * * @param string $image_url Image URL. * @param array|string $args Array of Photon arguments. * @param string|null $scheme Image scheme. Default to null. */ $image_url = apply_filters( 'jetpack_photon_pre_image_url', $image_url, $args, $scheme ); /** * Filter the original Photon image parameters before Photon is applied to an image. * * @module photon * * @since 1.9.0 * * @param array|string $args Array of Photon arguments. * @param string $image_url Image URL. * @param string|null $scheme Image scheme. Default to null. */ $args = apply_filters( 'jetpack_photon_pre_args', $args, $image_url, $scheme ); if ( empty( $image_url ) ) { return $image_url; } $image_url_parts = wp_parse_url( $image_url ); // Unable to parse. if ( ! is_array( $image_url_parts ) || empty( $image_url_parts['host'] ) || empty( $image_url_parts['path'] ) ) { return $image_url; } if ( is_array( $args ) ) { // Convert values that are arrays into strings. foreach ( $args as $arg => $value ) { if ( is_array( $value ) ) { $args[ $arg ] = implode( ',', $value ); } } // Encode values. // See https://core.trac.wordpress.org/ticket/17923 . $args = rawurlencode_deep( $args ); } // Don't photon-ize WPCOM hosted images -- we can serve them up from wpcom directly. $is_wpcom_image = false; if ( wp_endswith( strtolower( $image_url_parts['host'] ), '.files.wordpress.com' ) ) { $is_wpcom_image = true; if ( isset( $args['ssl'] ) ) { // Do not send the ssl argument to prevent caching issues. unset( $args['ssl'] ); } } /** This filter is documented below. */ $custom_photon_url = apply_filters( 'jetpack_photon_domain', '', $image_url ); $custom_photon_url = esc_url( $custom_photon_url ); // You can't run a Photon URL through Photon again because query strings are stripped. // So if the image is already a Photon URL, append the new arguments to the existing URL. // Alternately, if it's a *.files.wordpress.com url, then keep the domain as is. if ( in_array( $image_url_parts['host'], array( 'i0.wp.com', 'i1.wp.com', 'i2.wp.com' ), true ) || wp_parse_url( $custom_photon_url, PHP_URL_HOST ) === $image_url_parts['host'] || $is_wpcom_image ) { /* * VideoPress Poster images should only keep one param, ssl. */ if ( is_array( $args ) && 'videos.files.wordpress.com' === strtolower( $image_url_parts['host'] ) ) { $args = array_intersect_key( array( 'ssl' => 1 ), $args ); } $photon_url = add_query_arg( $args, $image_url ); return jetpack_photon_url_scheme( $photon_url, $scheme ); } /** * Allow Photon to use query strings as well. * By default, Photon doesn't support query strings so we ignore them and look only at the path. * This setting is Photon Server dependent. * * @module photon * * @since 1.9.0 * * @param bool false Should images using query strings go through Photon. Default is false. * @param string $image_url_parts['host'] Image URL's host. */ if ( ! apply_filters( 'jetpack_photon_any_extension_for_domain', false, $image_url_parts['host'] ) ) { // Photon doesn't support query strings so we ignore them and look only at the path. // However some source images are served via PHP so check the no-query-string extension. // For future proofing, this is a blacklist of common issues rather than a whitelist. $extension = pathinfo( $image_url_parts['path'], PATHINFO_EXTENSION ); if ( empty( $extension ) || in_array( $extension, array( 'php', 'ashx' ), true ) ) { return $image_url; } } $image_host_path = $image_url_parts['host'] . $image_url_parts['path']; /* * Figure out which CDN subdomain to use. * * The goal is to have the same subdomain for any particular image to prevent multiple runs resulting in multiple * images needing to be downloaded by the browser. * * We are providing our own generated value by taking the modulus of the crc32 value of the URL. * * Valid values are 0, 1, and 2. */ $subdomain = abs( crc32( $image_host_path ) % 3 ); /** * Filters the domain used by the Photon module. * * @module photon * * @since 3.4.2 * * @param string https://i{$subdomain}.wp.com Domain used by Photon. $subdomain is a random number between 0 and 2. * @param string $image_url URL of the image to be photonized. */ $photon_domain = apply_filters( 'jetpack_photon_domain', "https://i{$subdomain}.wp.com", $image_url ); $photon_domain = trailingslashit( esc_url( $photon_domain ) ); $photon_url = $photon_domain . $image_host_path; /** * Add query strings to Photon URL. * By default, Photon doesn't support query strings so we ignore them. * This setting is Photon Server dependent. * * @module photon * * @since 1.9.0 * * @param bool false Should query strings be added to the image URL. Default is false. * @param string $image_url_parts['host'] Image URL's host. */ if ( isset( $image_url_parts['query'] ) && apply_filters( 'jetpack_photon_add_query_string_to_domain', false, $image_url_parts['host'] ) ) { $photon_url .= '?q=' . rawurlencode( $image_url_parts['query'] ); } if ( $args ) { if ( is_array( $args ) ) { $photon_url = add_query_arg( $args, $photon_url ); } else { // You can pass a query string for complicated requests but where you still want CDN subdomain help, etc. $photon_url .= '?' . $args; } } if ( isset( $image_url_parts['scheme'] ) && 'https' === $image_url_parts['scheme'] ) { $photon_url = add_query_arg( array( 'ssl' => 1 ), $photon_url ); } return jetpack_photon_url_scheme( $photon_url, $scheme ); } /** * Add an easy way to photon-ize a URL that is safe to call even if Jetpack isn't active. * * See: https://jetpack.com/2013/07/11/photon-and-themes/ */ add_filter( 'jetpack_photon_url', 'jetpack_photon_url', 10, 3 ); /** * WordPress.com * * If a cropped WP.com-hosted image is the source image, have Photon replicate the crop. */ add_filter( 'jetpack_photon_pre_args', 'jetpack_photon_parse_wpcom_query_args', 10, 2 ); /** * Parses WP.com-hosted image args to replicate the crop. * * @param mixed $args Args set during Photon's processing. * @param string $image_url URL of the image. * @return array|string Args for Photon to use for the URL. */ function jetpack_photon_parse_wpcom_query_args( $args, $image_url ) { $parsed_url = wp_parse_url( $image_url ); if ( ! $parsed_url ) { return $args; } $image_url_parts = wp_parse_args( $parsed_url, array( 'host' => '', 'query' => '', ) ); if ( '.files.wordpress.com' !== substr( $image_url_parts['host'], -20 ) ) { return $args; } if ( empty( $image_url_parts['query'] ) ) { return $args; } $wpcom_args = wp_parse_args( $image_url_parts['query'] ); if ( empty( $wpcom_args['w'] ) || empty( $wpcom_args['h'] ) ) { return $args; } // Keep the crop by using "resize". if ( ! empty( $wpcom_args['crop'] ) ) { if ( is_array( $args ) ) { $args = array_merge( array( 'resize' => array( $wpcom_args['w'], $wpcom_args['h'] ) ), $args ); } else { $args = 'resize=' . rawurlencode( absint( $wpcom_args['w'] ) . ',' . absint( $wpcom_args['h'] ) ) . '&' . $args; } } else { if ( is_array( $args ) ) { $args = array_merge( array( 'fit' => array( $wpcom_args['w'], $wpcom_args['h'] ) ), $args ); } else { $args = 'fit=' . rawurlencode( absint( $wpcom_args['w'] ) . ',' . absint( $wpcom_args['h'] ) ) . '&' . $args; } } return $args; } /** * Sets the scheme for a URL * * @param string $url URL to set scheme. * @param string $scheme Scheme to use. Accepts http, https, network_path. * * @return string URL. */ function jetpack_photon_url_scheme( $url, $scheme ) { if ( ! in_array( $scheme, array( 'http', 'https', 'network_path' ), true ) ) { if ( preg_match( '#^(https?:)?//#', $url ) ) { return $url; } $scheme = 'http'; } if ( 'network_path' === $scheme ) { $scheme_slashes = '//'; } else { $scheme_slashes = "$scheme://"; } return preg_replace( '#^([a-z:]+)?//#i', $scheme_slashes, $url ); } /** * A wrapper for PHP's parse_url, prepending assumed scheme for network path * URLs. PHP versions 5.4.6 and earlier do not correctly parse without scheme. * * WP ships with a wrapper for parse_url, wp_parse_url, that should be used instead. * * @see https://php.net/manual/en/function.parse-url.php#refsect1-function.parse-url-changelog * @deprecated 7.8.0 Use wp_parse_url instead. * * @param string $url The URL to parse. * @param integer $component Retrieve specific URL component. * @return mixed Result of parse_url */ function jetpack_photon_parse_url( $url, $component = -1 ) { _deprecated_function( 'jetpack_photon_parse_url', 'jetpack-7.8.0', 'wp_parse_url' ); return wp_parse_url( $url, $component ); } add_filter( 'jetpack_photon_skip_for_url', 'jetpack_photon_banned_domains', 9, 2 ); /** * Check to skip Photon for a known domain that shouldn't be Photonized. * * @param bool $skip If the image should be skipped by Photon. * @param string $image_url URL of the image. * * @return bool Should the image be skipped by Photon. */ function jetpack_photon_banned_domains( $skip, $image_url ) { $banned_host_patterns = array( '/^chart\.googleapis\.com$/', '/^chart\.apis\.google\.com$/', '/^graph\.facebook\.com$/', '/\.fbcdn\.net$/', '/\.paypalobjects\.com$/', '/\.dropbox\.com$/', '/\.cdninstagram\.com$/', '/\.wikimedia\.org$/', ); $host = wp_parse_url( $image_url, PHP_URL_HOST ); foreach ( $banned_host_patterns as $banned_host_pattern ) { if ( 1 === preg_match( $banned_host_pattern, $host ) ) { return true; } } return $skip; } /** * Jetpack Photon - Support Text Widgets. * * @access public * @param string $content Content from text widget. * @return string */ function jetpack_photon_support_text_widgets( $content ) { if ( class_exists( 'Jetpack_Photon' ) && Jetpack::is_module_active( 'photon' ) ) { return Jetpack_Photon::filter_the_content( $content ); } return $content; } add_filter( 'widget_text', 'jetpack_photon_support_text_widgets' );
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