jetpack / modules / shortcodes / twitter.php

twitter.php in Jetpack – WP Security, Backup, Speed, & Growth 14.8, at modules/shortcodes/twitter.php

83 lines 2.6 KB

Raw Download Zip

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	/**
20	* Update Twitter providers to use Automattic's Twitter/X oEmbed proxy.
21	*
22	* See paFLeq-3QD-p2.
23	*
24	* @param string $provider The URL of the oEmbed provider.
25	*
26	* @return string The modified URL of the oEmbed provider.
27	*/
28	function jetpack_proxy_twitter_oembed_provider( $provider ) {
29	if ( ! wp_startswith( $provider, 'https://publish.twitter.com/oembed' ) ) {
30	return $provider;
31	}
32
33	// Allow other plugins to override the proxy URL. This constant should be set on the WordPress.com side
34	// to handle proxying after we're authenticated the request with the Jetpack token.
35	$oembed_proxy_url = Constants::is_defined( 'JETPACK__TWITTER_OEMBED_PROXY_URL' )
36	? Constants::get_constant( 'JETPACK__TWITTER_OEMBED_PROXY_URL' )
37	: '';
38
39	// If we don't have a proxy URL, then we'll try to proxy through the WordPress.com.
40	// To that end, we need to make sure that we're connected to WP.com and that we're not in offline mode.
41	if ( empty( $oembed_proxy_url ) ) {
42	if ( ! Jetpack::is_connection_ready() \|\| ( new Status() )->is_offline_mode() ) {
43	return $provider;
44	}
45
46	$oembed_proxy_url = esc_url_raw(
47	sprintf(
48	'%s/wpcom/v2/oembed-proxy',
49	JETPACK__WPCOM_JSON_API_BASE,
50	Jetpack_Options::get_option( 'id' )
51	)
52	);
53
54	add_filter( 'oembed_remote_get_args', 'jetpack_twitter_oembed_remote_get_args', 10, 2 );
55	}
56
57	return str_replace( 'https://publish.twitter.com/oembed', $oembed_proxy_url, $provider );
58	}
59	add_filter( 'oembed_fetch_url', 'jetpack_proxy_twitter_oembed_provider', 10 );
60
61	/**
62	* Add JP auth headers if we're proxying through WP.com.
63	*
64	* @param array $args oEmbed remote get arguments.
65	* @param string $url URL to be inspected.
66	*/
67	function jetpack_twitter_oembed_remote_get_args( $args, $url ) {
68	if ( ! wp_startswith( $url, Constants::get_constant( 'JETPACK__WPCOM_JSON_API_BASE' ) ) ) {
69	return $args;
70	}
71
72	$method = 'GET';
73	$signed_request = Client::build_signed_request(
74	compact( 'url', 'method' )
75	);
76
77	if ( is_wp_error( $signed_request ) ) {
78	return $args;
79	}
80
81	return $signed_request['request'];
82	}
83