twitter.php
| 1 | <?php |
| 2 | /** |
| 3 | * Twitter/X oEmbed proxy functionality. |
| 4 | * |
| 5 | * This file handles proxying Twitter/X oEmbed requests through Automattic's infrastructure |
| 6 | * to minimize issues with rate limiting with 404 responses from Twitter/X. |
| 7 | * |
| 8 | * Unlike tweet.php which handles the [tweet] shortcode, this file provides core oEmbed support |
| 9 | * and is force-loaded via module-extras.php regardless of module status. |
| 10 | * |
| 11 | * @package automattic/jetpack |
| 12 | * @since 14.5 |
| 13 | */ |
| 14 | |
| 15 | use Automattic\Jetpack\Connection\Client; |
| 16 | use Automattic\Jetpack\Constants; |
| 17 | use Automattic\Jetpack\Status; |
| 18 | |
| 19 | if ( ! defined( 'ABSPATH' ) ) { |
| 20 | exit( 0 ); |
| 21 | } |
| 22 | |
| 23 | /** |
| 24 | * Update Twitter providers to use Automattic's Twitter/X oEmbed proxy. |
| 25 | * |
| 26 | * See paFLeq-3QD-p2. |
| 27 | * |
| 28 | * @param string $provider The URL of the oEmbed provider. |
| 29 | * |
| 30 | * @return string The modified URL of the oEmbed provider. |
| 31 | */ |
| 32 | function jetpack_proxy_twitter_oembed_provider( $provider ) { |
| 33 | if ( ! wp_startswith( $provider, 'https://publish.twitter.com/oembed' ) ) { |
| 34 | return $provider; |
| 35 | } |
| 36 | |
| 37 | // Allow other plugins to override the proxy URL. This constant should be set on the WordPress.com side |
| 38 | // to handle proxying after we're authenticated the request with the Jetpack token. |
| 39 | $oembed_proxy_url = Constants::is_defined( 'JETPACK__TWITTER_OEMBED_PROXY_URL' ) |
| 40 | ? Constants::get_constant( 'JETPACK__TWITTER_OEMBED_PROXY_URL' ) |
| 41 | : ''; |
| 42 | |
| 43 | // If we don't have a proxy URL, then we'll try to proxy through the WordPress.com. |
| 44 | // To that end, we need to make sure that we're connected to WP.com and that we're not in offline mode. |
| 45 | if ( empty( $oembed_proxy_url ) ) { |
| 46 | if ( ! Jetpack::is_connection_ready() || ( new Status() )->is_offline_mode() ) { |
| 47 | return $provider; |
| 48 | } |
| 49 | |
| 50 | $oembed_proxy_url = esc_url_raw( |
| 51 | sprintf( |
| 52 | '%s/wpcom/v2/oembed-proxy', |
| 53 | JETPACK__WPCOM_JSON_API_BASE, |
| 54 | Jetpack_Options::get_option( 'id' ) |
| 55 | ) |
| 56 | ); |
| 57 | |
| 58 | add_filter( 'oembed_remote_get_args', 'jetpack_twitter_oembed_remote_get_args', 10, 2 ); |
| 59 | } |
| 60 | |
| 61 | return str_replace( 'https://publish.twitter.com/oembed', $oembed_proxy_url, $provider ); |
| 62 | } |
| 63 | add_filter( 'oembed_fetch_url', 'jetpack_proxy_twitter_oembed_provider', 10 ); |
| 64 | |
| 65 | /** |
| 66 | * Add JP auth headers if we're proxying through WP.com. |
| 67 | * |
| 68 | * @param array $args oEmbed remote get arguments. |
| 69 | * @param string $url URL to be inspected. |
| 70 | */ |
| 71 | function jetpack_twitter_oembed_remote_get_args( $args, $url ) { |
| 72 | if ( ! wp_startswith( $url, Constants::get_constant( 'JETPACK__WPCOM_JSON_API_BASE' ) ) ) { |
| 73 | return $args; |
| 74 | } |
| 75 | |
| 76 | $method = 'GET'; |
| 77 | $signed_request = Client::build_signed_request( |
| 78 | compact( 'url', 'method' ) |
| 79 | ); |
| 80 | |
| 81 | if ( is_wp_error( $signed_request ) ) { |
| 82 | return $args; |
| 83 | } |
| 84 | |
| 85 | return $signed_request['request']; |
| 86 | } |
| 87 |