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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,210 @@ | ||
| <?php | ||
|
|
||
| if ((! defined('WP_REDIS_DISABLED') || ! WP_REDIS_DISABLED) | ||
| && class_exists('WP_Redis_Page_Cache') | ||
| ) : | ||
|
|
||
| /** | ||
| * Advanced Cache API | ||
| */ | ||
|
|
||
| $redis_cache = new WP_Redis_Page_Cache(); | ||
| $redis_cache->cache_status_header($redis_cache::CACHE_STATUS_MISS); | ||
|
|
||
| // Don't cache interactive scripts or API endpoints | ||
| if (in_array(basename($_SERVER['SCRIPT_FILENAME']), [ | ||
| 'wp-cron.php', | ||
| 'xmlrpc.php', | ||
| ])) { | ||
| $redis_cache->cache_status_header($redis_cache::CACHE_STATUS_BYPASS); | ||
|
|
||
| return; | ||
| } | ||
|
|
||
| // Don't cache javascript generators | ||
| if (strpos($_SERVER['SCRIPT_FILENAME'], 'wp-includes/js') !== false) { | ||
| $redis_cache->cache_status_header($redis_cache::CACHE_STATUS_BYPASS); | ||
|
|
||
| return; | ||
| } | ||
|
|
||
| // Only cache HEAD and GET requests | ||
| if (isset($_SERVER['REQUEST_METHOD']) && ! in_array($_SERVER['REQUEST_METHOD'], ['GET', 'HEAD'])) { | ||
| $redis_cache->cache_status_header($redis_cache::CACHE_STATUS_BYPASS); | ||
|
|
||
| return; | ||
| } | ||
|
|
||
| // Don't cache when cookies indicate a cache-exempt visitor | ||
| if (is_array($_COOKIE) && ! empty($_COOKIE)) { | ||
| foreach (array_keys($_COOKIE) as $cookie) { | ||
| if (in_array($cookie, $redis_cache->noskip_cookies)) { | ||
| continue; | ||
| } | ||
|
|
||
| if (strpos($cookie, 'wp') === 0 || | ||
| strpos($cookie, 'wordpress') === 0 || | ||
| strpos($cookie, 'comment_author') === 0 | ||
| ) { | ||
| $redis_cache->cache_status_header($redis_cache::CACHE_STATUS_BYPASS); | ||
|
|
||
| return; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| if (! defined('WP_CONTENT_DIR')) { | ||
| $redis_cache->cache_status_header($redis_cache::CACHE_STATUS_DOWN); | ||
|
|
||
| return; | ||
| } | ||
|
|
||
| if (! require_once WP_CONTENT_DIR . '/object-cache.php') { | ||
| $redis_cache->cache_status_header($redis_cache::CACHE_STATUS_DOWN); | ||
|
|
||
| return; | ||
| } | ||
|
|
||
| wp_cache_init(); | ||
|
|
||
| if (! ($wp_object_cache instanceof WP_Redis_Object_Cache)) { | ||
| $redis_cache->cache_status_header($redis_cache::CACHE_STATUS_DOWN); | ||
|
|
||
| return; | ||
| } | ||
|
|
||
| // Cache is disabled | ||
| if ($redis_cache->max_age < 1) { | ||
| $redis_cache->cache_status_header($redis_cache::CACHE_STATUS_BYPASS); | ||
|
|
||
| return; | ||
| } | ||
|
|
||
| // Necessary to prevent clients using cached version after login cookies set | ||
| if (defined('WP_REDIS_VARY_COOKIE') && WP_REDIS_VARY_COOKIE) { | ||
| header('Vary: Cookie', false); | ||
| } | ||
|
|
||
| if (function_exists('wp_cache_add_global_groups')) { | ||
| wp_cache_add_global_groups([$redis_cache->group]); | ||
| } | ||
|
|
||
| $redis_cache->setup_request(); | ||
| $redis_cache->do_variants(); | ||
| $redis_cache->generate_keys(); | ||
|
|
||
| $genlock = false; | ||
| $do_cache = false; | ||
| $serve_cache = false; | ||
| $cache = wp_cache_get($redis_cache->key, $redis_cache->group); | ||
|
|
||
| if (isset($cache['version']) && $cache['version'] !== $redis_cache->url_version) { | ||
| // Refresh the cache if a newer version is available | ||
| $redis_cache->cache_status_header($redis_cache::CACHE_STATUS_EXPIRED); | ||
| $do_cache = true; | ||
| } else if ($redis_cache->seconds < 1 || $redis_cache->times < 2) { | ||
| if (is_array($cache) && time() < $cache['time'] + $cache['max_age']) { | ||
| $do_cache = false; | ||
| $serve_cache = true; | ||
| } else if (is_array($cache) && $redis_cache->use_stale) { | ||
| $do_cache = true; | ||
| $serve_cache = true; | ||
| } else { | ||
| $do_cache = true; | ||
| } | ||
| } else if (! is_array($cache) || time() >= $cache['time'] + $redis_cache->max_age - $redis_cache->seconds) { | ||
| // No cache item found, or ready to sample traffic again at the end of the cache life | ||
|
|
||
| wp_cache_add($redis_cache->req_key, 0, $redis_cache->group); | ||
| $requests = wp_cache_incr($redis_cache->req_key, 1, $redis_cache->group); | ||
|
|
||
| if ($requests >= $redis_cache->times) { | ||
| if (is_array($cache) && time() >= $cache['time'] + $cache['max_age']) { | ||
| $redis_cache->cache_status_header($redis_cache::CACHE_STATUS_EXPIRED); | ||
| } | ||
|
|
||
| wp_cache_delete($redis_cache->req_key, $redis_cache->group); | ||
| $do_cache = true; | ||
| } else { | ||
| $redis_cache->cache_status_header($redis_cache::CACHE_STATUS_IGNORED); | ||
| $do_cache = false; | ||
| } | ||
| } | ||
|
|
||
| // Obtain cache generation lock | ||
| if ($do_cache) { | ||
| $genlock = wp_cache_add("{$redis_cache->url_key}_genlock", 1, $redis_cache->group, 10); | ||
| } | ||
|
|
||
| if ($serve_cache && | ||
| isset($cache['time'], $cache['max_age']) && | ||
| time() < $cache['time'] + $cache['max_age'] | ||
| ) { | ||
| // Respect ETags | ||
| $three04 = false; | ||
|
|
||
| if (isset($_SERVER['HTTP_IF_NONE_MATCH'], $cache['headers']['ETag'][0]) && | ||
| $_SERVER['HTTP_IF_NONE_MATCH'] == $cache['headers']['ETag'][0] | ||
| ) { | ||
| $three04 = true; | ||
| } else if ($redis_cache->cache_control && isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) { | ||
| $client_time = strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']); | ||
|
|
||
| if (isset($cache['headers']['Last-Modified'][0])) { | ||
| $cache_time = strtotime($cache['headers']['Last-Modified'][0]); | ||
| } else { | ||
| $cache_time = $cache['time']; | ||
| } | ||
|
|
||
| if ($client_time >= $cache_time) { | ||
| $three04 = true; | ||
| } | ||
| } | ||
|
|
||
| // Use the cache save time for `Last-Modified` so we can issue "304 Not Modified", | ||
| // but don't clobber a cached `Last-Modified` header. | ||
| if ($redis_cache->cache_control && ! isset($cache['headers']['Last-Modified'][0])) { | ||
| header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $cache['time']) . ' GMT', true); | ||
| header('Cache-Control: max-age=' . ($cache['max_age'] - time() + $cache['time']) . ', must-revalidate', true); | ||
| } | ||
|
|
||
| $redis_cache->do_headers($redis_cache->headers, $cache['headers']); | ||
|
|
||
| if ($three04) { | ||
| $protocol = $_SERVER['SERVER_PROTOCOL']; | ||
|
|
||
| if (! preg_match('/^HTTP\/[0-9]{1}.[0-9]{1}$/', $protocol)) { | ||
| $protocol = 'HTTP/1.0'; | ||
| } | ||
|
|
||
| header("{$protocol} 304 Not Modified", true, 304); | ||
| $redis_cache->cache_status_header($redis_cache::CACHE_STATUS_HIT); | ||
| exit; | ||
| } | ||
|
|
||
| if (! empty($cache['status_header'])) { | ||
| header($cache['status_header'], true); | ||
| } | ||
|
|
||
| $redis_cache->cache_status_header($redis_cache::CACHE_STATUS_HIT); | ||
|
|
||
| if ($do_cache && function_exists('fastcgi_finish_request')) { | ||
| echo $cache['output']; | ||
| fastcgi_finish_request(); | ||
| } else { | ||
| echo $cache['output']; | ||
| exit; | ||
| } | ||
| } | ||
|
|
||
| if (! $do_cache || ! $genlock) { | ||
| return; | ||
| } | ||
|
|
||
| $wp_filter['status_header'][10]['redis_cache'] = [ | ||
| 'function' => [&$redis_cache, 'status_header'], | ||
| 'accepted_args' => 2 | ||
| ]; | ||
|
|
||
| ob_start([&$redis_cache, 'output_callback']); | ||
| endif; |
2 changes: 1 addition & 1 deletion
2
...ss-wp-redis-object-cache-cli-commands.php → src/class-wp-redis-cli-commands.php
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