localization.cls.php — LiteSpeed Cache 7.8.1

litespeed-cache / src / localization.cls.php

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localization.cls.php

209 lines

1	<?php
2	/**
3	* The localization class.
4	*
5	* @since 3.3
6	* @package LiteSpeed
7	*/
8
9	namespace LiteSpeed;
10
11	defined( 'WPINC' ) \|\| exit();
12
13	/**
14	* Localization - serve external resources locally.
15	*
16	* @since 3.3
17	*/
18	class Localization extends Base {
19
20	const LOG_TAG = '🛍️';
21
22	/**
23	* Init optimizer
24	*
25	* @since 3.0
26	* @access protected
27	*/
28	public function init() {
29	add_filter( 'litespeed_buffer_finalize', [ $this, 'finalize' ], 23 ); // After page optm
30	}
31
32	/**
33	* Localize Resources
34	*
35	* @since 3.3
36	*
37	* @param string $uri Base64-encoded URL.
38	*/
39	public function serve_static( $uri ) {
40	$url = base64_decode( $uri ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_decode
41
42	if ( ! $this->conf( self::O_OPTM_LOCALIZE ) ) {
43	exit( 'Not supported' );
44	}
45
46	$match = false;
47	$domains = $this->conf( self::O_OPTM_LOCALIZE_DOMAINS );
48	foreach ( $domains as $v ) {
49	if ( ! $v \|\| 0 === strpos( $v, '#' ) ) {
50	continue;
51	}
52
53	$type = 'js';
54	$domain = $v;
55	// Try to parse space split value
56	if ( strpos( $v, ' ' ) ) {
57	$v = explode( ' ', $v );
58	if ( ! empty( $v[1] ) ) {
59	$type = strtolower( $v[0] );
60	$domain = $v[1];
61	}
62	}
63
64	if ( 0 !== strpos( $domain, 'https://' ) ) {
65	continue;
66	}
67
68	if ( 'js' !== $type ) {
69	continue;
70	}
71
72	if ( $url !== $domain ) {
73	continue;
74	}
75
76	$match = true;
77	break;
78	}
79
80	if ( ! $match ) {
81	exit( 'Not supported2' );
82	}
83
84	header( 'Content-Type: application/javascript' );
85
86	// Generate
87	$this->_maybe_mk_cache_folder( 'localres' );
88
89	$file = $this->_realpath( $url );
90
91	self::debug( 'localize [url] ' . $url );
92	$response = wp_safe_remote_get( $url, [
93	'timeout' => 180,
94	'stream' => true,
95	'filename' => $file,
96	] );
97
98	// Parse response data
99	if ( is_wp_error( $response ) ) {
100	$error_message = $response->get_error_message();
101	if ( file_exists( $file ) ) {
102	wp_delete_file( $file );
103	}
104	self::debug( 'failed to get: ' . $error_message );
105	wp_safe_redirect( $url );
106	exit();
107	}
108
109	$url = $this->_rewrite( $url );
110
111	wp_safe_redirect( $url );
112	exit();
113	}
114
115	/**
116	* Get the final URL of local avatar
117	*
118	* @since 4.5
119	*
120	* @param string $url Original external URL.
121	* @return string Rewritten local URL.
122	*/
123	private function _rewrite( $url ) {
124	return LITESPEED_STATIC_URL . '/localres/' . $this->_filepath( $url );
125	}
126
127	/**
128	* Generate realpath of the cache file
129	*
130	* @since 4.5
131	* @access private
132	*
133	* @param string $url Original external URL.
134	* @return string Absolute file path.
135	*/
136	private function _realpath( $url ) {
137	return LITESPEED_STATIC_DIR . '/localres/' . $this->_filepath( $url );
138	}
139
140	/**
141	* Get filepath
142	*
143	* @since 4.5
144	*
145	* @param string $url Original external URL.
146	* @return string Relative file path.
147	*/
148	private function _filepath( $url ) {
149	$filename = md5( $url ) . '.js';
150	if ( is_multisite() ) {
151	$filename = get_current_blog_id() . '/' . $filename;
152	}
153	return $filename;
154	}
155
156	/**
157	* Localize JS/Fonts
158	*
159	* @since 3.3
160	* @access public
161	*
162	* @param string $content Page HTML content.
163	* @return string Modified content with localized URLs.
164	*/
165	public function finalize( $content ) {
166	if ( is_admin() ) {
167	return $content;
168	}
169
170	if ( ! $this->conf( self::O_OPTM_LOCALIZE ) ) {
171	return $content;
172	}
173
174	$domains = $this->conf( self::O_OPTM_LOCALIZE_DOMAINS );
175	if ( ! $domains ) {
176	return $content;
177	}
178
179	foreach ( $domains as $v ) {
180	if ( ! $v \|\| 0 === strpos( $v, '#' ) ) {
181	continue;
182	}
183
184	$type = 'js';
185	$domain = $v;
186	// Try to parse space split value
187	if ( strpos( $v, ' ' ) ) {
188	$v = explode( ' ', $v );
189	if ( ! empty( $v[1] ) ) {
190	$type = strtolower( $v[0] );
191	$domain = $v[1];
192	}
193	}
194
195	if ( 0 !== strpos( $domain, 'https://' ) ) {
196	continue;
197	}
198
199	if ( 'js' !== $type ) {
200	continue;
201	}
202
203	$content = str_replace( $domain, LITESPEED_STATIC_URL . '/localres/' . base64_encode( $domain ), $content ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
204	}
205
206	return $content;
207	}
208	}
209