/**
* concat_scripts()
*
* @param string $file
* @param array $handles
* @return void
**/
static function concat_scripts($file, $handles)
{
global $wp_scripts;
$js = array();
foreach ($handles as $handle) {
$src = $wp_scripts->registered[$handle]->src;
if (substr($src, 0, 1) == '/') {
$src = ABSPATH . ltrim($src, '/');
} else {
$src = str_replace(array(plugins_url(), content_url()), array(WP_PLUGIN_DIR, WP_CONTENT_DIR), $src);
}
$script = self::strip_bom(file_get_contents($src));
$js[] = self::compress_js($script);
}
cache_fs::put_contents($file, implode("\n\n", $js));
}
/**
* ob_callback()
*
* @param string $buffer
* @return string $buffer
**/
static function ob_callback($buffer)
{
if (!class_exists('sem_cache')) {
return $buffer;
}
if (DONOTCACHEPAGE) {
return $buffer;
}
# some things just shouldn't be cached
if (self::$nocache && !in_array(self::$status_code, array(301, 302, 404)) || !in_array(self::$status_code, array(200, 301, 302, 404))) {
return $buffer;
}
# sanity check on cookies
global $sem_cache_cookies;
if (!$sem_cache_cookies || $sem_cache_cookies != sem_cache::get_cookies()) {
return $buffer;
}
# only cache visitor requests
if (array_intersect(array_keys($_COOKIE), $sem_cache_cookies)) {
return $buffer;
}
# bail on valid but rarely served pages
if (self::$status_code == 200 && !(!is_feed() && is_singular() || !is_feed() && (is_home() || is_category()) && !is_paged() || is_feed() && (!is_archive() && !is_singular() || is_category()))) {
return $buffer;
}
#don't cache a contact form page due to spam prevention techniques
// if ( preg_match("/(\bsem_contact_form\b)/i",$buffer) )
// return $buffer;
#don't cache a page due if a sem_no_cache flag is found. Provide manual way to exclude a page
if (preg_match("/(\\bsem_do_not_cache\\b)/i", $buffer)) {
return $buffer;
}
$permalink_structure = get_option('permalink_structure');
# statically cache only when relevant
self::$static &= strpos($_SERVER['REQUEST_URI'], './') === false && self::$status_code == 200 && !is_feed() && empty($_GET) && $permalink_structure && strpos($permalink_structure, "|/index\\.php/|") === false;
# sanity check on the base folder
$host = get_option('home');
if (preg_match("|^([^/]+://[^/]+)/|", $host, $_host)) {
$host = end($_host);
}
if ($host != self::$host) {
return $buffer;
}
# sanity check on incomplete files
if (!in_array(self::$status_code, array(301, 302)) && !preg_match("/(?:<\\/html>|<\\/rss>|<\\/feed>)/i", $buffer)) {
return $buffer;
}
# sanity check on mobile users
global $sem_mobile_agents;
if ($sem_mobile_agents != sem_cache::get_mobile_agents()) {
return $buffer;
}
$mobile_agents = $sem_mobile_agents;
// $mobile_agents = array_map('preg_quote', (array) $mobile_agents);
$mobile_agents = implode("|", $mobile_agents);
if (preg_match("{({$mobile_agents})}i", $_SERVER['HTTP_USER_AGENT'])) {
return $buffer;
}
if (preg_match("/(?=.*?\\bandroid\\b)(?=.*?\\bmobile\\b).*\$/i", $_SERVER['HTTP_USER_AGENT'])) {
return $buffer;
}
// made it through all the checks. Let's minify the html now
// $buffer = self::minify_html( $buffer );
if (self::$static) {
$file = preg_replace("/#.*/", '', $_SERVER['REQUEST_URI']);
$file = '/static/' . trim($file, '/');
if (!preg_match("/\\.html\$/", $file)) {
global $wp_rewrite;
if ($wp_rewrite->use_trailing_slashes) {
$file = $file . '/index.html';
} else {
$file = $file . '.html';
}
}
cache_fs::put_contents($file, $buffer);
} elseif (self::$memory) {
$cache_id = $host . preg_replace("/#.*/", '', $_SERVER['REQUEST_URI']);
$cache_id = md5($cache_id);
$headers = headers_list();
if (self::$status_header) {
array_unshift($headers, self::$status_header);
}
wp_cache_add($cache_id, $headers, 'cached_headers', cache_timeout);
if ($buffer && !in_array(self::$status_code, array(301, 302))) {
wp_cache_add($cache_id, $buffer, 'cached_buffers', cache_timeout);
}
} elseif (!(function_exists('is_multisite') && is_multisite())) {
# poor man's memcached
$cache_id = $host . preg_replace("/#.*/", '', $_SERVER['REQUEST_URI']);
$cache_id = md5($cache_id);
$file = '/semi-static/' . $cache_id;
$headers = headers_list();
if (self::$status_header) {
array_unshift($headers, self::$status_header);
}
cache_fs::put_contents($file . '.meta', serialize($headers));
if ($buffer && !in_array(self::$status_code, array(301, 302))) {
cache_fs::put_contents($file . '.html', $buffer);
}
}
return $buffer;
}
