searchpro / inc / common-functions.php

common-functions.php in BerqWP – All-In-One Optimization for Core Web Vitals, Cache, CDN, Images, CSS & JavaScript 4.1.18, at inc/common-functions.php

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1	<?php
2
3	function bwp_pass_cookie_requirement() {
4	$berqconfigs = berqConfigs::getInstance();
5	$configs = $berqconfigs->get_configs();
6	$default = ['berqwpnocache', 'wp-postpass', 'comment_author', 'woocommerce_cart_hash', 'edd_items_in_cart'];
7	$excluded_cookies = array_merge($configs['exclude_cookies'], $default);
8
9	if (!empty($excluded_cookies)) {
10	foreach ($excluded_cookies as $cookie_id) {
11
12	// Skip if empty
13	if (empty($cookie_id)) {
14	continue;
15	}
16
17	foreach ($_COOKIE as $key => $value) {
18	if (strpos($key, $cookie_id) === 0) {
19	return false;
20	}
21	}
22	}
23	}
24
25	return true;
26	}
27
28	function bwp_request_is_https() {
29	if (!empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) !== 'off') {
30	return true;
31	}
32
33	// Reverse proxy / load balancer terminating TLS upstream
34	if (!empty($_SERVER['HTTP_X_FORWARDED_PROTO'])) {
35	// may be a comma-separated chain: "https,http" — first hop is the client
36	$proto = strtolower(trim(explode(',', $_SERVER['HTTP_X_FORWARDED_PROTO'])[0]));
37	if ($proto === 'https') {
38	return true;
39	}
40	}
41
42	if (!empty($_SERVER['HTTP_X_FORWARDED_SSL']) && strtolower($_SERVER['HTTP_X_FORWARDED_SSL']) === 'on') {
43	return true;
44	}
45
46	if (!empty($_SERVER['HTTP_FRONT_END_HTTPS']) && strtolower($_SERVER['HTTP_FRONT_END_HTTPS']) === 'on') {
47	return true;
48	}
49
50	if (!empty($_SERVER['SERVER_PORT']) && (int) $_SERVER['SERVER_PORT'] === 443) {
51	return true;
52	}
53
54	return false;
55	}
56
57	function bwp_get_request_url() {
58
59	$scheme = 'http://';
60
61	if (bwp_request_is_https()) {
62	$scheme = 'https://';
63	} elseif (function_exists('wp_parse_url') && function_exists('get_option')) {
64	$scheme = (wp_parse_url(get_option('home'), PHP_URL_SCHEME) === 'https') ? 'https://' : 'http://';
65	}
66
67	$host = isset($_SERVER['HTTP_HOST']) ? strip_tags(stripslashes($_SERVER['HTTP_HOST'])) : 'localhost';
68	$uri = isset($_SERVER['REQUEST_URI']) ? strip_tags(stripslashes($_SERVER['REQUEST_URI'])) : '/';
69	$url = $scheme . $host . $uri;
70	return strtolower($url);
71	}
72
73	// function bwp_build_cache_path($url) {
74	// $parts = parse_url($url);
75
76	// $host = $parts['host'] ?? '';
77	// $path = $parts['path'] ?? '/';
78
79	// // normalize
80	// $path = '/' . ltrim($path, '/');
81	// $path = rtrim($path, '/');
82
83	// if ($path === '') {
84	// $path = '/';
85	// }
86
87	// // sanitize
88	// $host = preg_replace('#[^a-zA-Z0-9\.\-]#', '', $host);
89	// $path = preg_replace('#[^a-zA-Z0-9/_-]#', '', $path);
90
91	// return $host . $path;
92	// }
93
94	function bwp_build_cache_path($url) {
95	$parts = parse_url($url);
96	$host = $parts['host'] ?? '';
97	$path = $parts['path'] ?? '/';
98	$query = $parts['query'] ?? '';
99
100	// normalize path
101	$path = '/' . ltrim($path, '/');
102	$path = rtrim($path, '/');
103	if ($path === '') {
104	$path = '/';
105	}
106
107	// sanitize host
108	$host = preg_replace('#[^a-zA-Z0-9\.\-]#', '', $host);
109
110	// Normalize percent-encoded chars to raw UTF-8, then strip only chars that
111	// are unsafe on filesystems (null bytes, path traversal sequences).
112	$path = urldecode($path);
113	$path = str_replace("\0", '', $path);
114	$path = preg_replace('#\.\.+#', '', $path);
115	$path = preg_replace('#[<>:"\\\\\|?*]#', '', $path);
116
117	if ($query === '') {
118	return $path === '/' ? $host : $host . $path;
119	}
120
121	// normalize query param order so ?b=2&a=1 and ?a=1&b=2 hit the same cache
122	parse_str($query, $params);
123	ksort($params);
124	$normalized_query = http_build_query($params);
125
126	// hash it — query strings can contain anything and be very long
127	$query_hash = substr(md5($normalized_query), 0, 12);
128
129	return $host . $path . '/q-' . $query_hash;
130	}
131
132	/**
133	* Redirect a mismatched-trailing-slash request to its canonical form, the same
134	* way WordPress's redirect_canonical() would — but without needing WordPress
135	* to boot first. Used by the advanced-cache.php dropin, which runs before the
136	* DB connection is available.
137	*/
138	function bwp_redirect_to_canonical_slash($wants_trailing_slash) {
139	$uri = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : '/';
140	$parts = explode('?', $uri, 2);
141	$path = $parts[0];
142	$query = isset($parts[1]) ? '?' . $parts[1] : '';
143
144	if ($wants_trailing_slash) {
145	$path = rtrim($path, '/') . '/';
146	} else {
147	$path = rtrim($path, '/');
148	if ($path === '') {
149	$path = '/';
150	}
151	}
152
153	$scheme = bwp_request_is_https() ? 'https://' : 'http://';
154	$host = isset($_SERVER['HTTP_HOST']) ? strip_tags(stripslashes($_SERVER['HTTP_HOST'])) : '';
155
156	header('Location: ' . $scheme . $host . $path . $query, true, 301);
157	exit();
158	}
159
160	function bwp_serve_advanced_cache($serve_from = 'plugin') {
161
162	if (php_sapi_name() === 'cli' \|\| (defined('WP_CLI') && WP_CLI)) {
163	return;
164	}
165
166	if ( strpos( $_SERVER["REQUEST_URI"], "berqwp-ping" ) !== false ) {
167	echo "PONG";
168	exit();
169	}
170
171	if (isset($_SERVER['REQUEST_METHOD']) && $_SERVER['REQUEST_METHOD'] === 'GET' && !bwp_is_user_logged_in() && !bwp_is_ajax() && !berqDetectCrawler::is_crawler() && bwp_pass_cookie_requirement()) {
172
173	$berqconfigs = berqConfigs::getInstance();
174	$configs = $berqconfigs->get_configs();
175	$url = bwp_get_request_url();
176	$url = @dropin_remove_ignore_params($url);
177	$cache_key = md5($url);
178	$cache_directory = WP_CONTENT_DIR . '/cache/berqwp/html/';
179	if (defined('MULTISITE') && MULTISITE) {
180	$blog_id = berqConfigs::detect_blog_id_from_request();
181	$cache_directory .= 'site-' . $blog_id . '/';
182	}
183	$cache_file = $cache_directory . $cache_key . '.html';
184	$cache_file_gz = $cache_directory . $cache_key . '.gz';
185	$cache_file_gz = $cache_directory . bwp_build_cache_path($url) . '/index.html.gz';
186	$cache_file = $cache_file_gz;
187	$cache_max_life = file_exists($cache_file) ? @filemtime($cache_file) + $configs['cache_lifespan'] : null;
188	// $compression_enabled = $configs['page_compression'] === true;
189	$compression_enabled = true;
190	$accept_encoding = $_SERVER['HTTP_ACCEPT_ENCODING'] ?? '';
191	$supports_gzip = strpos($accept_encoding, 'gzip') !== false;
192	$domain = isset($_SERVER['HTTP_HOST']) ? strip_tags(stripslashes($_SERVER['HTTP_HOST'])) : '';
193
194	if (berqwp_dropin_is_page_url_excluded($url)) {
195	return;
196	}
197
198	$request_path = parse_url($url, PHP_URL_PATH) ?? '/';
199	if ($request_path !== '/' && isset($configs['permalink_trailing_slash']) && $configs['permalink_trailing_slash'] !== null) {
200	$has_trailing_slash = substr($request_path, -1) === '/';
201	if ($configs['permalink_trailing_slash'] !== $has_trailing_slash) {
202	bwp_redirect_to_canonical_slash($configs['permalink_trailing_slash']);
203	}
204	}
205
206	if (file_exists($cache_file) && $cache_max_life > time()) {
207	$file_content = @file_get_contents($cache_file);
208
209	if (!isset($_GET['creating_cache']) && file_exists($cache_file)) {
210
211	if (strpos($file_content, "Optimized with BerqWP's instant cache") !== false && (filemtime($cache_file) + DAY_IN_SECONDS) < time()) {
212	return;
213	}
214
215	// Prepare gzip cache file
216	if ($compression_enabled && file_exists($cache_file_gz)) {
217	$cache_file = $cache_file_gz;
218	// header('Content-Encoding: gzip');
219	header_remove('Content-Encoding');
220	}
221
222	$lastModified = filemtime($cache_file);
223	$etag = md5_file($cache_file);
224	header('ETag: ' . $etag);
225	header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $lastModified) . ' GMT');
226	header('X-File-Size: ' . filesize($cache_file), true);
227	header('Content-Type: text/html; charset=utf-8');
228	header("X-served: $serve_from");
229	header("X-BerqWP-Cache: HIT");
230	// header('Vary: Cookie');
231
232	// Check if the client has a cached copy and if it's still valid using Last-Modified
233	if ((isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) >= $lastModified) \|\| (isset($_SERVER['HTTP_IF_NONE_MATCH']) && $_SERVER['HTTP_IF_NONE_MATCH'] === $etag)) {
234	// The client's cache is still valid based on Last-Modified, respond with a 304 Not Modified
235	header('HTTP/1.1 304 Not Modified');
236	// header('Expires: ' . gmdate('D, d M Y H:i:s') . ' GMT');
237	// header("Expires: 0");
238	// header('Cache-Control: no-cache, must-revalidate');
239	header('Cache-Control: public, max-age=600, s-maxage=2592000, stale-while-revalidate=86400', true);
240	header('cdn-cache-control: max-age=2592000');
241	header("Cache-Tag: $domain");
242	exit();
243
244	}
245
246	// Prevent PHP/Apache from re-compressing the already-gzipped cache file
247	if (ini_get('zlib.output_compression')) {
248	ini_set('zlib.output_compression', 'Off');
249	}
250
251	while (ob_get_level()) {
252	ob_end_clean();
253	}
254
255	// header('Cache-Control: public, max-age=0, s-maxage=3600, must-revalidate', true);
256	// header('Cache-Control: public, max-age=60, s-maxage=3600, stale-while-revalidate=60, must-revalidate', true);
257	header('Cache-Control: public, max-age=600, s-maxage=2592000, stale-while-revalidate=86400', true);
258	header('cdn-cache-control: max-age=2592000');
259	header("Cache-Tag: $domain");
260	// header("Content-Security-Policy: script-src 'self' blob: 'unsafe-inline'");
261	header('Vary: Accept-Encoding, Cookie');
262	header('Content-Encoding: gzip', true);
263	header('Content-Length: ' . filesize($cache_file), true);
264	readfile($cache_file);
265	exit();
266	}
267
268	}
269
270	}
271	}
272