Automattic /
jetpack
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| 1 | <?php |
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| 2 | |||
| 3 | /** |
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| 4 | * Generates a Photon URL. |
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| 5 | * |
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| 6 | * @see http://developer.wordpress.com/docs/photon/ |
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| 7 | * |
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| 8 | * @param string $image_url URL to the publicly accessible image you want to manipulate |
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| 9 | * @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) |
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| 10 | * @return string The raw final URL. You should run this through esc_url() before displaying it. |
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| 11 | */ |
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| 12 | function jetpack_photon_url( $image_url, $args = array(), $scheme = null ) { |
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| 13 | $image_url = trim( $image_url ); |
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| 14 | |||
| 15 | if ( class_exists( 'Jetpack') ) { |
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| 16 | /** |
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| 17 | * Disables Photon URL processing for local development |
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| 18 | * |
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| 19 | * @module photon |
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| 20 | * |
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| 21 | * @since 4.1.0 |
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| 22 | * |
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| 23 | * @param bool false Result of Jetpack::is_development_mode. |
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| 24 | */ |
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| 25 | if ( true === apply_filters( 'jetpack_photon_development_mode', Jetpack::is_development_mode() ) ) { |
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| 26 | return $image_url; |
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| 27 | } |
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| 28 | } |
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| 29 | |||
| 30 | /** |
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| 31 | * Allow specific image URls to avoid going through Photon. |
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| 32 | * |
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| 33 | * @module photon |
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| 34 | * |
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| 35 | * @since 3.2.0 |
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| 36 | * |
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| 37 | * @param bool false Should the image be returned as is, without going through Photon. Default to false. |
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| 38 | * @param string $image_url Image URL. |
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| 39 | * @param array|string $args Array of Photon arguments. |
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| 40 | * @param string|null $scheme Image scheme. Default to null. |
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| 41 | */ |
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| 42 | if ( false !== apply_filters( 'jetpack_photon_skip_for_url', false, $image_url, $args, $scheme ) ) { |
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| 43 | return $image_url; |
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| 44 | } |
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| 45 | |||
| 46 | /** |
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| 47 | * Filter the original image URL before it goes through Photon. |
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| 48 | * |
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| 49 | * @module photon |
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| 50 | * |
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| 51 | * @since 1.9.0 |
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| 52 | * |
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| 53 | * @param string $image_url Image URL. |
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| 54 | * @param array|string $args Array of Photon arguments. |
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| 55 | * @param string|null $scheme Image scheme. Default to null. |
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| 56 | */ |
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| 57 | $image_url = apply_filters( 'jetpack_photon_pre_image_url', $image_url, $args, $scheme ); |
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| 58 | /** |
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| 59 | * Filter the original Photon image parameters before Photon is applied to an image. |
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| 60 | * |
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| 61 | * @module photon |
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| 62 | * |
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| 63 | * @since 1.9.0 |
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| 64 | * |
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| 65 | * @param array|string $args Array of Photon arguments. |
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| 66 | * @param string $image_url Image URL. |
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| 67 | * @param string|null $scheme Image scheme. Default to null. |
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| 68 | */ |
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| 69 | $args = apply_filters( 'jetpack_photon_pre_args', $args, $image_url, $scheme ); |
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| 70 | |||
| 71 | if ( empty( $image_url ) ) |
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| 72 | return $image_url; |
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| 73 | |||
| 74 | $image_url_parts = @jetpack_photon_parse_url( $image_url ); |
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| 75 | |||
| 76 | // Unable to parse |
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| 77 | if ( ! is_array( $image_url_parts ) || empty( $image_url_parts['host'] ) || empty( $image_url_parts['path'] ) ) |
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| 78 | return $image_url; |
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| 79 | |||
| 80 | if ( is_array( $args ) ){ |
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| 81 | // Convert values that are arrays into strings |
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| 82 | foreach ( $args as $arg => $value ) { |
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| 83 | if ( is_array( $value ) ) { |
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| 84 | $args[$arg] = implode( ',', $value ); |
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| 85 | } |
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| 86 | } |
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| 87 | |||
| 88 | // Encode values |
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| 89 | // See http://core.trac.wordpress.org/ticket/17923 |
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| 90 | $args = rawurlencode_deep( $args ); |
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| 91 | } |
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| 92 | |||
| 93 | /* Don't photon-ize WPCOM hosted images with only the following url args: |
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| 94 | * `w`, `h`, `fit`, `crop`, `zoom`, `strip`, `resize`, `quality` |
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| 95 | * These args can just be added to the wpcom-version of the image, and save on latency. |
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| 96 | */ |
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| 97 | $is_wpcom_image_with_safe_args = false; |
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| 98 | $allowed_wpcom_keys = array( |
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| 99 | 'w' => true, |
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| 100 | 'h' => true, |
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| 101 | 'fit' => true, |
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| 102 | 'crop' => true, |
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| 103 | 'zoom' => true, |
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| 104 | 'strip' => true, |
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| 105 | 'resize' => true, |
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| 106 | 'quality' => true, |
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| 107 | ); |
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| 108 | if ( wp_endswith( strtolower( $image_url_parts['host'] ), '.files.wordpress.com' ) && ! array_diff_key( $args, $allowed_wpcom_keys ) ) { |
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| 109 | $is_wpcom_image_with_safe_args = true; |
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| 110 | } |
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| 111 | |||
| 112 | /** This filter is documented below. */ |
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| 113 | $custom_photon_url = apply_filters( 'jetpack_photon_domain', '', $image_url ); |
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| 114 | $custom_photon_url = esc_url( $custom_photon_url ); |
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| 115 | |||
| 116 | // You can't run a Photon URL through Photon again because query strings are stripped. |
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| 117 | // So if the image is already a Photon URL, append the new arguments to the existing URL. |
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| 118 | // Alternately, if it's a *.files.wordpress.com url, and the arguments are supported, keep the domain. |
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| 119 | if ( |
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| 120 | in_array( $image_url_parts['host'], array( 'i0.wp.com', 'i1.wp.com', 'i2.wp.com' ) ) |
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| 121 | || $image_url_parts['host'] === jetpack_photon_parse_url( $custom_photon_url, PHP_URL_HOST ) |
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| 122 | || $is_wpcom_image_with_safe_args |
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| 123 | ) { |
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| 124 | $photon_url = add_query_arg( $args, $image_url ); |
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| 125 | return jetpack_photon_url_scheme( $photon_url, $scheme ); |
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| 126 | } |
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| 127 | |||
| 128 | /** |
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| 129 | * Allow Photon to use query strings as well. |
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| 130 | * By default, Photon doesn't support query strings so we ignore them and look only at the path. |
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| 131 | * This setting is Photon Server dependent. |
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| 132 | * |
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| 133 | * @module photon |
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| 134 | * |
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| 135 | * @since 1.9.0 |
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| 136 | * |
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| 137 | * @param bool false Should images using query strings go through Photon. Default is false. |
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| 138 | * @param string $image_url_parts['host'] Image URL's host. |
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| 139 | */ |
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| 140 | if ( ! apply_filters( 'jetpack_photon_any_extension_for_domain', false, $image_url_parts['host'] ) ) { |
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| 141 | // Photon doesn't support query strings so we ignore them and look only at the path. |
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| 142 | // However some source images are served via PHP so check the no-query-string extension. |
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| 143 | // For future proofing, this is a blacklist of common issues rather than a whitelist. |
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| 144 | $extension = pathinfo( $image_url_parts['path'], PATHINFO_EXTENSION ); |
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| 145 | if ( empty( $extension ) || in_array( $extension, array( 'php', 'ashx' ) ) ) |
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| 146 | return $image_url; |
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| 147 | } |
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| 148 | |||
| 149 | $image_host_path = $image_url_parts['host'] . $image_url_parts['path']; |
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| 150 | |||
| 151 | // Figure out which CDN subdomain to use |
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| 152 | srand( crc32( $image_host_path ) ); |
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| 153 | $subdomain = rand( 0, 2 ); |
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| 154 | srand(); |
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| 155 | |||
| 156 | /** |
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| 157 | * Filters the domain used by the Photon module. |
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| 158 | * |
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| 159 | * @module photon |
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| 160 | * |
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| 161 | * @since 3.4.2 |
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| 162 | * |
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| 163 | * @param string https://i{$subdomain}.wp.com Domain used by Photon. $subdomain is a random number between 0 and 2. |
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| 164 | * @param string $image_url URL of the image to be photonized. |
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| 165 | */ |
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| 166 | $photon_domain = apply_filters( 'jetpack_photon_domain', "https://i{$subdomain}.wp.com", $image_url ); |
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| 167 | $photon_domain = trailingslashit( esc_url( $photon_domain ) ); |
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| 168 | $photon_url = $photon_domain . $image_host_path; |
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| 169 | |||
| 170 | /** |
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| 171 | * Add query strings to Photon URL. |
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| 172 | * By default, Photon doesn't support query strings so we ignore them. |
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| 173 | * This setting is Photon Server dependent. |
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| 174 | * |
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| 175 | * @module photon |
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| 176 | * |
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| 177 | * @since 1.9.0 |
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| 178 | * |
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| 179 | * @param bool false Should query strings be added to the image URL. Default is false. |
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| 180 | * @param string $image_url_parts['host'] Image URL's host. |
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| 181 | */ |
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| 182 | if ( isset( $image_url_parts['query'] ) && apply_filters( 'jetpack_photon_add_query_string_to_domain', false, $image_url_parts['host'] ) ) { |
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| 183 | $photon_url .= '?q=' . rawurlencode( $image_url_parts['query'] ); |
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| 184 | } |
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| 185 | |||
| 186 | if ( $args ) { |
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| 187 | if ( is_array( $args ) ) { |
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| 188 | $photon_url = add_query_arg( $args, $photon_url ); |
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| 189 | } else { |
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| 190 | // You can pass a query string for complicated requests but where you still want CDN subdomain help, etc. |
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| 191 | $photon_url .= '?' . $args; |
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| 192 | } |
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| 193 | } |
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| 194 | |||
| 195 | if ( isset( $image_url_parts['scheme'] ) && 'https' == $image_url_parts['scheme'] ) { |
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| 196 | $photon_url = add_query_arg( array( 'ssl' => 1 ), $photon_url ); |
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| 197 | } |
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| 198 | |||
| 199 | return jetpack_photon_url_scheme( $photon_url, $scheme ); |
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| 200 | } |
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| 201 | add_filter( 'jetpack_photon_url', 'jetpack_photon_url', 10, 3 ); |
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| 202 | |||
| 203 | /** |
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| 204 | * WordPress.com |
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| 205 | * |
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| 206 | * If a cropped WP.com-hosted image is the source image, have Photon replicate the crop. |
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| 207 | */ |
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| 208 | add_filter( 'jetpack_photon_pre_args', 'jetpack_photon_parse_wpcom_query_args', 10, 2 ); |
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| 209 | |||
| 210 | function jetpack_photon_parse_wpcom_query_args( $args, $image_url ) { |
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| 211 | $parsed_url = @parse_url( $image_url ); |
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| 212 | |||
| 213 | if ( ! $parsed_url ) |
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| 214 | return $args; |
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| 215 | |||
| 216 | $image_url_parts = wp_parse_args( $parsed_url, array( |
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| 217 | 'host' => '', |
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| 218 | 'query' => '' |
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| 219 | ) ); |
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| 220 | |||
| 221 | if ( '.files.wordpress.com' != substr( $image_url_parts['host'], -20 ) ) |
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| 222 | return $args; |
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| 223 | |||
| 224 | if ( empty( $image_url_parts['query'] ) ) |
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| 225 | return $args; |
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| 226 | |||
| 227 | $wpcom_args = wp_parse_args( $image_url_parts['query'] ); |
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| 228 | |||
| 229 | if ( empty( $wpcom_args['w'] ) || empty( $wpcom_args['h'] ) ) |
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| 230 | return $args; |
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| 231 | |||
| 232 | // Keep the crop by using "resize" |
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| 233 | if ( ! empty( $wpcom_args['crop'] ) ) { |
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| 234 | View Code Duplication | if ( is_array( $args ) ) { |
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| 235 | $args = array_merge( array( 'resize' => array( $wpcom_args['w'], $wpcom_args['h'] ) ), $args ); |
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| 236 | } else { |
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| 237 | $args = 'resize=' . rawurlencode( absint( $wpcom_args['w'] ) . ',' . absint( $wpcom_args['h'] ) ) . '&' . $args; |
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| 238 | } |
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| 239 | View Code Duplication | } else { |
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| 240 | if ( is_array( $args ) ) { |
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| 241 | $args = array_merge( array( 'fit' => array( $wpcom_args['w'], $wpcom_args['h'] ) ), $args ); |
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| 242 | } else { |
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| 243 | $args = 'fit=' . rawurlencode( absint( $wpcom_args['w'] ) . ',' . absint( $wpcom_args['h'] ) ) . '&' . $args; |
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| 244 | } |
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| 245 | } |
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| 246 | |||
| 247 | return $args; |
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| 248 | } |
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| 249 | |||
| 250 | |||
| 251 | /** |
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| 252 | |||
| 253 | */ |
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| 254 | add_filter( 'jetpack_photon_add_query_string_to_domain', 'jetpack_photon_allow_facebook_graph_domain', 10, 2 ); |
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| 255 | add_filter( 'jetpack_photon_any_extension_for_domain', 'jetpack_photon_allow_facebook_graph_domain', 10, 2 ); |
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| 256 | |||
| 257 | function jetpack_photon_url_scheme( $url, $scheme ) { |
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| 258 | if ( ! in_array( $scheme, array( 'http', 'https', 'network_path' ) ) ) { |
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| 259 | if ( preg_match( '#^(https?:)?//#', $url ) ) { |
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| 260 | return $url; |
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| 261 | } |
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| 262 | |||
| 263 | $scheme = 'http'; |
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| 264 | } |
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| 265 | |||
| 266 | if ( 'network_path' == $scheme ) { |
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| 267 | $scheme_slashes = '//'; |
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| 268 | } else { |
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| 269 | $scheme_slashes = "$scheme://"; |
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| 270 | } |
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| 271 | |||
| 272 | return preg_replace( '#^([a-z:]+)?//#i', $scheme_slashes, $url ); |
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| 273 | } |
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| 274 | |||
| 275 | function jetpack_photon_allow_facebook_graph_domain( $allow = false, $domain ) { |
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| 276 | switch ( $domain ) { |
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| 277 | case 'graph.facebook.com' : |
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| 278 | return true; |
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| 279 | } |
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| 280 | |||
| 281 | return $allow; |
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| 282 | } |
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| 283 | |||
| 284 | /** |
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| 285 | * A wrapper for PHP's parse_url, prepending assumed scheme for network path |
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| 286 | * URLs. PHP versions 5.4.6 and earlier do not correctly parse without scheme. |
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| 287 | * |
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| 288 | * @see http://php.net/manual/en/function.parse-url.php#refsect1-function.parse-url-changelog |
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| 289 | * |
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| 290 | * @param string $url The URL to parse |
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| 291 | * @param integer $component Retrieve specific URL component |
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| 292 | * @return mixed Result of parse_url |
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| 293 | */ |
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| 294 | function jetpack_photon_parse_url( $url, $component = -1 ) { |
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| 295 | if ( 0 === strpos( $url, '//' ) ) { |
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| 296 | $url = ( is_ssl() ? 'https:' : 'http:' ) . $url; |
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| 297 | } |
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| 298 | |||
| 299 | return parse_url( $url, $component ); |
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| 300 | } |
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| 301 | |||
| 302 | add_filter( 'jetpack_photon_skip_for_url', 'jetpack_photon_banned_domains', 9, 4 ); |
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| 303 | function jetpack_photon_banned_domains( $skip, $image_url, $args, $scheme ) { |
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| 304 | $banned_domains = array( |
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| 305 | 'http://chart.googleapis.com/', |
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| 306 | 'https://chart.googleapis.com/', |
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| 307 | 'http://chart.apis.google.com/', |
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| 308 | ); |
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| 309 | |||
| 310 | foreach ( $banned_domains as $banned_domain ) { |
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| 311 | if ( wp_startswith( $image_url, $banned_domain ) ) |
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| 312 | return true; |
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| 313 | } |
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| 314 | |||
| 315 | return $skip; |
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| 316 | } |
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| 317 | |||
| 318 | |||
| 319 | /** |
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| 320 | * Jetpack Photon - Support Text Widgets. |
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| 321 | * |
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| 322 | * @access public |
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| 323 | * @param string $content Content from text widget. |
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| 324 | * @return string |
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| 325 | */ |
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| 326 | function jetpack_photon_support_text_widgets( $content ) { |
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| 327 | if ( class_exists( 'Jetpack_Photon' ) && Jetpack::is_module_active( 'photon' ) ) { |
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| 328 | return Jetpack_Photon::filter_the_content( $content ); |
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| 329 | } |
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| 330 | return $content; |
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| 331 | } |
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| 332 | add_filter( 'widget_text', 'jetpack_photon_support_text_widgets' ); |
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| 333 |
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.