| 1 |
<?php |
| 2 |
|
| 3 |
use Automattic\Jetpack\Status; |
| 4 |
|
| 5 |
/** |
| 6 |
* Generic functions using the Photon service. |
| 7 |
* |
| 8 |
* Some are used outside of the Photon module being active, so intentionally not within the module. |
| 9 |
* |
| 10 |
* @package automattic/jetpack |
| 11 |
*/ |
| 12 |
|
| 13 |
/** |
| 14 |
* Generates a Photon URL. |
| 15 |
* |
| 16 |
* @see https://developer.wordpress.com/docs/photon/ |
| 17 |
* |
| 18 |
* @param string $image_url URL to the publicly accessible image you want to manipulate. |
| 19 |
* @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). |
| 20 |
* @param string|null $scheme URL protocol. |
| 21 |
* @return string The raw final URL. You should run this through esc_url() before displaying it. |
| 22 |
*/ |
| 23 |
function jetpack_photon_url( $image_url, $args = array(), $scheme = null ) { |
| 24 |
$image_url = trim( $image_url ); |
| 25 |
|
| 26 |
if ( ! defined( 'IS_WPCOM' ) || ! IS_WPCOM ) { |
| 27 |
/** |
| 28 |
* Disables Photon URL processing for local development |
| 29 |
* |
| 30 |
* @module photon |
| 31 |
* |
| 32 |
* @since 4.1.0 |
| 33 |
* |
| 34 |
* @param bool false Result of Automattic\Jetpack\Status->is_offline_mode(). |
| 35 |
*/ |
| 36 |
if ( true === apply_filters( 'jetpack_photon_development_mode', ( new Status() )->is_offline_mode() ) ) { |
| 37 |
return $image_url; |
| 38 |
} |
| 39 |
} |
| 40 |
|
| 41 |
/** |
| 42 |
* Allow specific image URls to avoid going through Photon. |
| 43 |
* |
| 44 |
* @module photon |
| 45 |
* |
| 46 |
* @since 3.2.0 |
| 47 |
* |
| 48 |
* @param bool false Should the image be returned as is, without going through Photon. Default to false. |
| 49 |
* @param string $image_url Image URL. |
| 50 |
* @param array|string $args Array of Photon arguments. |
| 51 |
* @param string|null $scheme Image scheme. Default to null. |
| 52 |
*/ |
| 53 |
if ( false !== apply_filters( 'jetpack_photon_skip_for_url', false, $image_url, $args, $scheme ) ) { |
| 54 |
return $image_url; |
| 55 |
} |
| 56 |
|
| 57 |
/** |
| 58 |
* Filter the original image URL before it goes through Photon. |
| 59 |
* |
| 60 |
* @module photon |
| 61 |
* |
| 62 |
* @since 1.9.0 |
| 63 |
* |
| 64 |
* @param string $image_url Image URL. |
| 65 |
* @param array|string $args Array of Photon arguments. |
| 66 |
* @param string|null $scheme Image scheme. Default to null. |
| 67 |
*/ |
| 68 |
$image_url = apply_filters( 'jetpack_photon_pre_image_url', $image_url, $args, $scheme ); |
| 69 |
/** |
| 70 |
* Filter the original Photon image parameters before Photon is applied to an image. |
| 71 |
* |
| 72 |
* @module photon |
| 73 |
* |
| 74 |
* @since 1.9.0 |
| 75 |
* |
| 76 |
* @param array|string $args Array of Photon arguments. |
| 77 |
* @param string $image_url Image URL. |
| 78 |
* @param string|null $scheme Image scheme. Default to null. |
| 79 |
*/ |
| 80 |
$args = apply_filters( 'jetpack_photon_pre_args', $args, $image_url, $scheme ); |
| 81 |
|
| 82 |
if ( empty( $image_url ) ) { |
| 83 |
return $image_url; |
| 84 |
} |
| 85 |
|
| 86 |
$image_url_parts = wp_parse_url( $image_url ); |
| 87 |
|
| 88 |
// Unable to parse. |
| 89 |
if ( ! is_array( $image_url_parts ) || empty( $image_url_parts['host'] ) || empty( $image_url_parts['path'] ) ) { |
| 90 |
return $image_url; |
| 91 |
} |
| 92 |
|
| 93 |
if ( is_array( $args ) ) { |
| 94 |
// Convert values that are arrays into strings. |
| 95 |
foreach ( $args as $arg => $value ) { |
| 96 |
if ( is_array( $value ) ) { |
| 97 |
$args[ $arg ] = implode( ',', $value ); |
| 98 |
} |
| 99 |
} |
| 100 |
|
| 101 |
// Encode values. |
| 102 |
// See https://core.trac.wordpress.org/ticket/17923 . |
| 103 |
$args = rawurlencode_deep( $args ); |
| 104 |
} |
| 105 |
|
| 106 |
// Don't photon-ize WPCOM hosted images -- we can serve them up from wpcom directly. |
| 107 |
$is_wpcom_image = false; |
| 108 |
if ( wp_endswith( strtolower( $image_url_parts['host'] ), '.files.wordpress.com' ) ) { |
| 109 |
$is_wpcom_image = true; |
| 110 |
if ( isset( $args['ssl'] ) ) { |
| 111 |
// Do not send the ssl argument to prevent caching issues. |
| 112 |
unset( $args['ssl'] ); |
| 113 |
} |
| 114 |
} |
| 115 |
|
| 116 |
/** This filter is documented below. */ |
| 117 |
$custom_photon_url = apply_filters( 'jetpack_photon_domain', '', $image_url ); |
| 118 |
$custom_photon_url = esc_url( $custom_photon_url ); |
| 119 |
|
| 120 |
// You can't run a Photon URL through Photon again because query strings are stripped. |
| 121 |
// So if the image is already a Photon URL, append the new arguments to the existing URL. |
| 122 |
// Alternately, if it's a *.files.wordpress.com url, then keep the domain as is. |
| 123 |
if ( |
| 124 |
in_array( $image_url_parts['host'], array( 'i0.wp.com', 'i1.wp.com', 'i2.wp.com' ), true ) |
| 125 |
|| wp_parse_url( $custom_photon_url, PHP_URL_HOST ) === $image_url_parts['host'] |
| 126 |
|| $is_wpcom_image |
| 127 |
) { |
| 128 |
$photon_url = add_query_arg( $args, $image_url ); |
| 129 |
return jetpack_photon_url_scheme( $photon_url, $scheme ); |
| 130 |
} |
| 131 |
|
| 132 |
/** |
| 133 |
* Allow Photon to use query strings as well. |
| 134 |
* By default, Photon doesn't support query strings so we ignore them and look only at the path. |
| 135 |
* This setting is Photon Server dependent. |
| 136 |
* |
| 137 |
* @module photon |
| 138 |
* |
| 139 |
* @since 1.9.0 |
| 140 |
* |
| 141 |
* @param bool false Should images using query strings go through Photon. Default is false. |
| 142 |
* @param string $image_url_parts['host'] Image URL's host. |
| 143 |
*/ |
| 144 |
if ( ! apply_filters( 'jetpack_photon_any_extension_for_domain', false, $image_url_parts['host'] ) ) { |
| 145 |
// Photon doesn't support query strings so we ignore them and look only at the path. |
| 146 |
// However some source images are served via PHP so check the no-query-string extension. |
| 147 |
// For future proofing, this is an excluded list of common issues rather than an allow list. |
| 148 |
$extension = pathinfo( $image_url_parts['path'], PATHINFO_EXTENSION ); |
| 149 |
if ( empty( $extension ) || in_array( $extension, array( 'php', 'ashx' ), true ) ) { |
| 150 |
return $image_url; |
| 151 |
} |
| 152 |
} |
| 153 |
|
| 154 |
$image_host_path = $image_url_parts['host'] . $image_url_parts['path']; |
| 155 |
|
| 156 |
/* |
| 157 |
* Figure out which CDN subdomain to use. |
| 158 |
* |
| 159 |
* The goal is to have the same subdomain for any particular image to prevent multiple runs resulting in multiple |
| 160 |
* images needing to be downloaded by the browser. |
| 161 |
* |
| 162 |
* We are providing our own generated value by taking the modulus of the crc32 value of the URL. |
| 163 |
* |
| 164 |
* Valid values are 0, 1, and 2. |
| 165 |
*/ |
| 166 |
$subdomain = abs( crc32( $image_host_path ) % 3 ); |
| 167 |
|
| 168 |
/** |
| 169 |
* Filters the domain used by the Photon module. |
| 170 |
* |
| 171 |
* @module photon |
| 172 |
* |
| 173 |
* @since 3.4.2 |
| 174 |
* |
| 175 |
* @param string https://i{$subdomain}.wp.com Domain used by Photon. $subdomain is a random number between 0 and 2. |
| 176 |
* @param string $image_url URL of the image to be photonized. |
| 177 |
*/ |
| 178 |
$photon_domain = apply_filters( 'jetpack_photon_domain', "https://i{$subdomain}.wp.com", $image_url ); |
| 179 |
$photon_domain = trailingslashit( esc_url( $photon_domain ) ); |
| 180 |
$photon_url = $photon_domain . $image_host_path; |
| 181 |
|
| 182 |
/** |
| 183 |
* Add query strings to Photon URL. |
| 184 |
* By default, Photon doesn't support query strings so we ignore them. |
| 185 |
* This setting is Photon Server dependent. |
| 186 |
* |
| 187 |
* @module photon |
| 188 |
* |
| 189 |
* @since 1.9.0 |
| 190 |
* |
| 191 |
* @param bool false Should query strings be added to the image URL. Default is false. |
| 192 |
* @param string $image_url_parts['host'] Image URL's host. |
| 193 |
*/ |
| 194 |
if ( isset( $image_url_parts['query'] ) && apply_filters( 'jetpack_photon_add_query_string_to_domain', false, $image_url_parts['host'] ) ) { |
| 195 |
$photon_url .= '?q=' . rawurlencode( $image_url_parts['query'] ); |
| 196 |
} |
| 197 |
|
| 198 |
if ( $args ) { |
| 199 |
if ( is_array( $args ) ) { |
| 200 |
$photon_url = add_query_arg( $args, $photon_url ); |
| 201 |
} else { |
| 202 |
// You can pass a query string for complicated requests but where you still want CDN subdomain help, etc. |
| 203 |
$photon_url .= '?' . $args; |
| 204 |
} |
| 205 |
} |
| 206 |
|
| 207 |
if ( isset( $image_url_parts['scheme'] ) && 'https' === $image_url_parts['scheme'] ) { |
| 208 |
$photon_url = add_query_arg( array( 'ssl' => 1 ), $photon_url ); |
| 209 |
} |
| 210 |
|
| 211 |
return jetpack_photon_url_scheme( $photon_url, $scheme ); |
| 212 |
} |
| 213 |
|
| 214 |
/** |
| 215 |
* Add an easy way to photon-ize a URL that is safe to call even if Jetpack isn't active. |
| 216 |
* |
| 217 |
* See: https://jetpack.com/2013/07/11/photon-and-themes/ |
| 218 |
*/ |
| 219 |
add_filter( 'jetpack_photon_url', 'jetpack_photon_url', 10, 3 ); |
| 220 |
|
| 221 |
/** |
| 222 |
* WordPress.com |
| 223 |
* |
| 224 |
* If a cropped WP.com-hosted image is the source image, have Photon replicate the crop. |
| 225 |
*/ |
| 226 |
add_filter( 'jetpack_photon_pre_args', 'jetpack_photon_parse_wpcom_query_args', 10, 2 ); |
| 227 |
|
| 228 |
/** |
| 229 |
* Parses WP.com-hosted image args to replicate the crop. |
| 230 |
* |
| 231 |
* @param mixed $args Args set during Photon's processing. |
| 232 |
* @param string $image_url URL of the image. |
| 233 |
* @return array|string Args for Photon to use for the URL. |
| 234 |
*/ |
| 235 |
function jetpack_photon_parse_wpcom_query_args( $args, $image_url ) { |
| 236 |
$parsed_url = wp_parse_url( $image_url ); |
| 237 |
|
| 238 |
if ( ! $parsed_url ) { |
| 239 |
return $args; |
| 240 |
} |
| 241 |
|
| 242 |
$image_url_parts = wp_parse_args( |
| 243 |
$parsed_url, |
| 244 |
array( |
| 245 |
'host' => '', |
| 246 |
'query' => '', |
| 247 |
) |
| 248 |
); |
| 249 |
|
| 250 |
if ( '.files.wordpress.com' !== substr( $image_url_parts['host'], -20 ) ) { |
| 251 |
return $args; |
| 252 |
} |
| 253 |
|
| 254 |
if ( empty( $image_url_parts['query'] ) ) { |
| 255 |
return $args; |
| 256 |
} |
| 257 |
|
| 258 |
$wpcom_args = wp_parse_args( $image_url_parts['query'] ); |
| 259 |
|
| 260 |
if ( empty( $wpcom_args['w'] ) || empty( $wpcom_args['h'] ) ) { |
| 261 |
return $args; |
| 262 |
} |
| 263 |
|
| 264 |
// Keep the crop by using "resize". |
| 265 |
if ( ! empty( $wpcom_args['crop'] ) ) { |
| 266 |
if ( is_array( $args ) ) { |
| 267 |
$args = array_merge( array( 'resize' => array( $wpcom_args['w'], $wpcom_args['h'] ) ), $args ); |
| 268 |
} else { |
| 269 |
$args = 'resize=' . rawurlencode( absint( $wpcom_args['w'] ) . ',' . absint( $wpcom_args['h'] ) ) . '&' . $args; |
| 270 |
} |
| 271 |
} else { |
| 272 |
if ( is_array( $args ) ) { |
| 273 |
$args = array_merge( array( 'fit' => array( $wpcom_args['w'], $wpcom_args['h'] ) ), $args ); |
| 274 |
} else { |
| 275 |
$args = 'fit=' . rawurlencode( absint( $wpcom_args['w'] ) . ',' . absint( $wpcom_args['h'] ) ) . '&' . $args; |
| 276 |
} |
| 277 |
} |
| 278 |
|
| 279 |
return $args; |
| 280 |
} |
| 281 |
|
| 282 |
/** |
| 283 |
* Sets the scheme for a URL |
| 284 |
* |
| 285 |
* @param string $url URL to set scheme. |
| 286 |
* @param string $scheme Scheme to use. Accepts http, https, network_path. |
| 287 |
* |
| 288 |
* @return string URL. |
| 289 |
*/ |
| 290 |
function jetpack_photon_url_scheme( $url, $scheme ) { |
| 291 |
if ( ! in_array( $scheme, array( 'http', 'https', 'network_path' ), true ) ) { |
| 292 |
if ( preg_match( '#^(https?:)?//#', $url ) ) { |
| 293 |
return $url; |
| 294 |
} |
| 295 |
|
| 296 |
$scheme = 'http'; |
| 297 |
} |
| 298 |
|
| 299 |
if ( 'network_path' === $scheme ) { |
| 300 |
$scheme_slashes = '//'; |
| 301 |
} else { |
| 302 |
$scheme_slashes = "$scheme://"; |
| 303 |
} |
| 304 |
|
| 305 |
return preg_replace( '#^([a-z:]+)?//#i', $scheme_slashes, $url ); |
| 306 |
} |
| 307 |
|
| 308 |
add_filter( 'jetpack_photon_skip_for_url', 'jetpack_photon_banned_domains', 9, 2 ); |
| 309 |
|
| 310 |
/** |
| 311 |
* Check to skip Photon for a known domain that shouldn't be Photonized. |
| 312 |
* |
| 313 |
* @param bool $skip If the image should be skipped by Photon. |
| 314 |
* @param string $image_url URL of the image. |
| 315 |
* |
| 316 |
* @return bool Should the image be skipped by Photon. |
| 317 |
*/ |
| 318 |
function jetpack_photon_banned_domains( $skip, $image_url ) { |
| 319 |
$banned_host_patterns = array( |
| 320 |
'/^chart\.googleapis\.com$/', |
| 321 |
'/^chart\.apis\.google\.com$/', |
| 322 |
'/^graph\.facebook\.com$/', |
| 323 |
'/\.fbcdn\.net$/', |
| 324 |
'/\.paypalobjects\.com$/', |
| 325 |
'/\.dropbox\.com$/', |
| 326 |
'/\.cdninstagram\.com$/', |
| 327 |
'/^(commons|upload)\.wikimedia\.org$/', |
| 328 |
'/\.wikipedia\.org$/', |
| 329 |
); |
| 330 |
|
| 331 |
$host = wp_parse_url( $image_url, PHP_URL_HOST ); |
| 332 |
|
| 333 |
foreach ( $banned_host_patterns as $banned_host_pattern ) { |
| 334 |
if ( 1 === preg_match( $banned_host_pattern, $host ) ) { |
| 335 |
return true; |
| 336 |
} |
| 337 |
} |
| 338 |
|
| 339 |
return $skip; |
| 340 |
} |
| 341 |
|
| 342 |
|
| 343 |
/** |
| 344 |
* Jetpack Photon - Support Text Widgets. |
| 345 |
* |
| 346 |
* @access public |
| 347 |
* @param string $content Content from text widget. |
| 348 |
* @return string |
| 349 |
*/ |
| 350 |
function jetpack_photon_support_text_widgets( $content ) { |
| 351 |
if ( class_exists( 'Jetpack_Photon' ) && Jetpack::is_module_active( 'photon' ) ) { |
| 352 |
return Jetpack_Photon::filter_the_content( $content ); |
| 353 |
} |
| 354 |
return $content; |
| 355 |
} |
| 356 |
add_filter( 'widget_text', 'jetpack_photon_support_text_widgets' ); |
| 357 |
|
