*/
class Abovethefold_Proxy
{
/**
* Above the fold controller
*
* @var object $CTRL
*/
public $CTRL;
/**
* Preload list for javascript
*/
public $js_preload = array();
/**
* Preload list for styles (CSS)
*/
public $css_preload = array();
/**
* Include list for javascript
*/
public $js_include = array();
/**
* Include list for styles (CSS)
*/
public $css_include = array();
/**
* Exclude list for javascript
*/
public $js_exclude = array();
/**
* Exclude list for styles (CSS)
*/
public $css_exclude = array(
'fonts.googleapis.com/css'
);
/**
* Resources with custom expire time
*/
public $custom_expire = array();
/**
* Regex based target url translation
*/
public $regex_url_translation = array();
/**
* CDN for cached resources
*/
public $cdn = false;
/**
* Custom CDN url for individual resources
*/
public $custom_resource_cdn = array();
/**
* CDN hosts (for localhost checking)
*/
public $cdn_hosts = array();
/**
* Valid javascript mimetypes
*/
public $js_mimetypes = array(
'application/javascript',
'application/x-javascript',
'application/ecmascript',
'text/javascript',
'text/ecmascript',
'text/plain'
);
/**
* Valid CSS mimetypes
*/
public $css_mimetypes = array(
'text/css',
'text/plain'
);
/**
* Absolute path with trailingslash
*/
private $abspath;
/**
* Default cache expire time in seconds
*/
public $default_cache_expire = 2592000; // 30 days
/**
* Initialize the class and set its properties
*/
public function __construct(&$CTRL)
{
$this->CTRL = & $CTRL;
if ($this->CTRL->disabled) {
return; // above the fold optimization disabled for area / page
}
if (!isset($this->CTRL->options['js_proxy'])) {
$this->CTRL->options['js_proxy'] = false;
}
if (!isset($this->CTRL->options['css_proxy'])) {
$this->CTRL->options['css_proxy'] = false;
}
if (isset($this->CTRL->options['proxy_cdn']) && $this->CTRL->options['proxy_cdn']) {
$this->cdn = $this->CTRL->options['proxy_cdn'];
$parsed_url = parse_url($this->cdn);
$this->cdn_hosts[] = $parsed_url['host'];
}
// set include/exclude list
$keys = array('js_include','css_include','js_exclude','css_exclude');
foreach ($keys as $key) {
$params = explode('_', $key);
if (empty($this->$key)) {
if (isset($this->CTRL->options[$params[0] . '_proxy_' . $params[1]]) && is_array($this->CTRL->options[$params[0] . '_proxy_' . $params[1]])) {
$this->$key = $this->CTRL->options[$params[0] . '_proxy_' . $params[1]];
continue 1;
}
}
// merge default include / exclude list with settings
$this->$key = array_unique(
array_filter(
array_merge($this->$key, ((isset($this->CTRL->options[$params[0] . '_proxy_' . $params[1]]) && is_array($this->CTRL->options[$params[0] . '_proxy_' . $params[1]])) ? $this->CTRL->options[$params[0] . '_proxy_' . $params[1]] : array())),
create_function('$value', 'return trim($value) !== "";')
)
);
}
// preload list
$preloadlist = array();
if ($this->CTRL->options['css_proxy']) {
// add filter for CSS file processing
$this->CTRL->loader->add_filter('abtf_cssfile_pre', $this, 'process_cssfile');
/**
* Preload urls
*/
if (isset($this->CTRL->options['css_proxy_preload']) && is_array($this->CTRL->options['css_proxy_preload']) && !empty($this->CTRL->options['css_proxy_preload'])) {
if (!empty($this->CTRL->options['css_proxy_preload'])) {
foreach ($this->CTRL->options['css_proxy_preload'] as $url) {
$preloadlist[] = array($url,'css');
}
}
}
}
if ($this->CTRL->options['js_proxy']) {
// add filter for javascript file processing
$this->CTRL->loader->add_filter('abtf_jsfile_pre', $this, 'process_jsfile');
/**
* Preload urls
*/
if (isset($this->CTRL->options['js_proxy_preload']) && is_array($this->CTRL->options['js_proxy_preload']) && !empty($this->CTRL->options['js_proxy_preload'])) {
foreach ($this->CTRL->options['js_proxy_preload'] as $url) {
$preloadlist[] = array($url,'js');
}
}
}
if (!empty($preloadlist)) {
$preload_hashes = array();
foreach ($preloadlist as $preloadurl) {
list($url, $type) = $preloadurl;
// JSON config
if ($url && is_array($url)) {
// regex
if (!isset($url['url']) || trim($url['url']) === '') {
// no target url
continue 1;
}
// apply custom expire time
if (isset($url['expire']) && $url['expire']) {
$this->custom_expire[$url['url']] = $url['expire'];
}
// regex
if (isset($url['regex']) && $url['regex']) {
$this->regex_url_translation[$url['url']] = array($url['regex'],$url['regex-flags']);
}
// custom resource CDN
if (isset($url['cdn']) && $url['cdn']) {
$this->custom_resource_cdn[$url['url']] = $url['cdn'];
$parsed_url = parse_url($url['cdn']);
if (!in_array($parsed_url['host'], $this->cdn_hosts)) {
$this->cdn_hosts[] = $parsed_url['host'];
}
}
$url_config = $url;
$url = $url_config['url'];
unset($url_config['url']);
} else {
$url_config = false;
}
// verify url
$url = trim($url);
if ($url === '') {
continue;
}
$cache_hash = $this->cache_hash($url, $type, $url);
if ($url_config) {
$preload_url = array();
// JSON config object
if (isset($url_config['regex'])) {
$preload_url[0] = 'regex';
$preload_url[1] = ($cache_hash) ? $cache_hash : false;
$preload_url[2] = $url_config['regex'];
$preload_url[3] = (isset($url_config['regex-flags']) ? $url_config['regex-flags'] : '');
} else {
if ($cache_hash || (isset($url_config['cdn']) && $url_config['cdn'])) {
$preload_url[0] = $url;
$preload_url[1] = ($cache_hash) ? $cache_hash : false;
$preload_url[2] = false;
$preload_url[3] = false;
}
}
if (isset($url_config['cdn']) && $url_config['cdn']) {
$preload_url[4] = preg_replace('|^(http(s)?:)?//[^/]+/|Ui', trailingslashit($url_config['cdn']), $this->CTRL->cache_dir('proxy'));
}
$this->{$type . '_preload'}[] = $preload_url;
} elseif ($cache_hash) {
// general cached resource
$this->{$type . '_preload'}[] = array($url,$cache_hash);
}
}
}
// WordPress root with trailingslash
$this->abspath = trailingslashit(ABSPATH);
}
/**
* Get proxy url for an URL
*
* Returns cache url
*/
public function url($url = '{PROXY:URL}', $type = '{PROXY:TYPE}', $tryCache = false, $htmlUrl = false)
{
if ($url !== '{PROXY:URL}') {
// strip hash from url
if (strpos($url, '#') !== false) {
$url = strstr($url, '#', true);
}
// parse url
$parsed = $this->parse_url($url);
if ($parsed) {
list($url, $filehash, $local_file) = $parsed;
// try direct url to file
if ($tryCache) {
// CDN
$cdn = false;
if (!empty($this->custom_resource_cdn) && isset($this->custom_resource_cdn[$url])) {
$cdn = $this->custom_resource_cdn[$url];
} elseif ($this->cdn) {
$cdn = $this->cdn;
}
$cache_url = $this->cache_url($filehash, $type, $url, $cdn);
if ($cache_url) {
return $cache_url;
}
}
$url = urlencode($url);
}
}
// html valid ampersand
$amp = ($htmlUrl) ? '&' : '&';
// custom proxy url
if (isset($this->CTRL->options['proxy_url']) && $this->CTRL->options['proxy_url'] !== '') {
$proxy_url = $this->CTRL->options['proxy_url'];
if ($url !== '{PROXY:URL}') {
$proxy_url = str_replace(array(
'{PROXY:URL}',
'{PROXY:TYPE}'
), array(
$url,
$type
), $proxy_url);
}
} else {
// default WordPress PHP proxy url
$site_url = site_url();
$proxy_url = $site_url . ((strpos($site_url, '?') !== false) ? $amp : '?') . 'url=' . $url . $amp . 'type=' . $type . $amp . 'abtf-proxy=' . md5(SECURE_AUTH_KEY . AUTH_KEY);
}
return $proxy_url;
}
/**
* Parse CSS file in CSS file loop
*/
public function process_cssfile($cssfile)
{
// ignore
if (!$cssfile || is_array($cssfile) || in_array($cssfile, array('delete','ignore'))) {
return $cssfile;
}
$parsed_url = parse_url($cssfile);
if ($localfile = $this->is_local($parsed_url, $cssfile)) {
// not external
return $localfile;
}
if (!empty($this->cdn_hosts) && in_array($parsed_url['host'], $this->cdn_hosts)) {
// on CDN, not external
return $cssfile;
}
/**
* File does not match include list, ignore
*/
if (!$this->url_include($cssfile, 'css')) {
return $cssfile;
}
/**
* File matches exclude list, ignore
*/
if ($this->url_exclude($cssfile, 'css')) {
return $cssfile;
}
// External, proxify url
return $this->url($cssfile, 'css', true, true);
}
/**
* Parse javascript file in javascript file loop
*/
public function process_jsfile($jsfile)
{
// ignore
if (!$jsfile || in_array($jsfile, array('delete','ignore'))) {
return $jsfile;
}
$parsed_url = parse_url($jsfile);
if ($localfile = $this->is_local($parsed_url, $jsfile)) {
// not external
return $localfile;
}
if (!empty($this->cdn_hosts) && in_array($parsed_url['host'], $this->cdn_hosts)) {
// on CDN, not external
return $jsfile;
}
/**
* File does not match include list, ignore
*/
if (!$this->url_include($jsfile, 'js')) {
return $jsfile;
}
/**
* File matches exclude list, ignore
*/
if ($this->url_exclude($jsfile, 'js')) {
return $jsfile;
}
// External, proxify url
return $this->url($jsfile, 'js', true, true);
}
/**
* Handle forbidden requests
*/
public function forbidden($text = 'Forbidden')
{
while (ob_get_level()) {
ob_end_clean();
};
wp_die($text, 'Proxy Forbidden - Above The Fold Optimization', array(
'response' => '403'
));
}
/**
* Handle errors
*/
public function error($text = 'Forbidden')
{
while (ob_get_level()) {
ob_end_clean();
};
wp_die($text, 'Proxy Error - Above The Fold Optimization', array(
'response' => '500'
));
}
/**
* Cache file path
*/
public function cache_file_path($hash, $type, $create = true)
{
// verify hash
if (strlen($hash) !== 32) {
$this->forbidden('Invalid cache file hash');
}
// Initialize cache path
$cache_path = $this->CTRL->cache_path('proxy');
if (!is_dir($cache_path)) {
$this->error('Proxy cache directory not available ' . $cache_path);
}
$dir_blocks = array_slice(str_split($hash, 2), 0, 3);
foreach ($dir_blocks as $block) {
$cache_path .= $block . '/';
if (!is_dir($cache_path)) {
if (!$create) {
return false;
} else {
if (!$this->CTRL->mkdir($cache_path)) {
$this->error('Failed to create directory ' . $cache_path);
}
}
}
}
$cache_path .= $hash;
if ($type === 'js') {
$cache_path .= '.js';
} elseif ($type === 'css') {
$cache_path .= '.css';
}
if (!$create && !file_exists($cache_path)) {
return false;
}
return $cache_path;
}
/**
* Cache file expired check
*/
public function cache_file_expired($cache_file, $url)
{
// file does not exist
if (!$cache_file || !file_exists($cache_file)) {
return true;
}
$last_modified = filemtime($cache_file);
if (!empty($this->custom_expire) && isset($this->custom_expire[$url])) {
$expire_time = $this->custom_expire[$url];
} else {
$expire_time = $this->default_cache_expire;
}
// expired
if ($last_modified < (time() - $expire_time)) {
return true;
}
return false;
}
/**
* Strip www. from hostname
*/
public function nowww_host($hostname)
{
if (stripos($hostname, 'www.') === 0) {
return substr($hostname, 4);
}
return $hostname;
}
/**
* Is local url?
*/
public function is_local($url, $originalUrl = false)
{
if (!$originalUrl) {
$originalUrl = $url;
$url = parse_url($url);
}
if (is_array($url) && $url['host']) {
$hostname = $url['host'];
} else {
$parsed_url = parse_url($url);
$hostname = $parsed_url['host'];
}
/**
* Verify hostname
*/
if ($this->nowww_host($hostname) === $this->nowww_host($_SERVER['HTTP_HOST'])) {
if (stripos($originalUrl, $_SERVER['HTTP_HOST']) === false) {
$originalUrl = str_ireplace($hostname, $_SERVER['HTTP_HOST'], $originalUrl);
}
/**
* Translate protocol relative url
*/
if (substr($originalUrl, 0, 2) === '//') {
// prefix url with protocol
$originalUrl = ((isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off') ? 'https:' : 'http:') . $originalUrl;
}
return $originalUrl;
}
return false;
}
/**
* Cache url
*/
public function cache_url($hash, $type, $urlExpiredCheck = false, $cdn = false)
{
// verify hash
if (strlen($hash) !== 32) {
$this->forbidden('Invalid cache file hash');
}
// check if cache file exists
$cache_path = $this->cache_file_path($hash, $type, false);
if (!$cache_path) {
return false;
}
// check if cache file is expired
if ($urlExpiredCheck && $this->cache_file_expired($cache_path, $urlExpiredCheck)) {
return false;
}
$url = $this->CTRL->cache_dir('proxy');
$dir_blocks = array_slice(str_split($hash, 2), 0, 3);
foreach ($dir_blocks as $block) {
$url .= $block . '/';
}
$url .= $hash;
if ($type === 'js') {
$url .= '.js';
} elseif ($type === 'css') {
$url .= '.css';
}
// apply CDN
if ($cdn) {
$url = preg_replace('|^http(s)?://[^/]+/|Ui', trailingslashit($cdn), $url);
}
return $url;
}
/**
* Handle request
*/
public function handle_request()
{
if ((!isset($this->CTRL->options['js_proxy']) || !$this->CTRL->options['js_proxy']) && (!isset($this->CTRL->options['css_proxy']) || !$this->CTRL->options['css_proxy'])) {
$this->forbidden('Proxy is disabled');
}
$url = (isset($_REQUEST['url'])) ? trim($_REQUEST['url']) : '';
$type = (isset($_REQUEST['type'])) ? trim($_REQUEST['type']) : '';
if (!in_array($type, array('js','css'))) {
$this->forbidden();
}
// proxy resource
$proxy_resource = $this->proxy_resource($url, $type, true);
if (!$proxy_resource) {
$this->forbidden();
}
list($filehash, $cache_file, $url) = $proxy_resource;
// Proxy failed for url (potentially insecure, not a valid javascript or CSS resource, url not recognized etc)
if (!$cache_file) {
// forward request to original location
header("Location: " . $url);
exit;
}
// get last modified time
$last_modified = filemtime($cache_file);
/**
* Verify last modified
*/
if (
(isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && @strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) == $last_modified)
|| (isset($_SERVER['HTTP_IF_NONE_MATCH']) && trim($_SERVER['HTTP_IF_NONE_MATCH']) == $filehash)
) {
header("Etag: $filehash");
header("Last-Modified: " . gmdate("D, d M Y H:i:s", $last_modified) . " GMT");
header("HTTP/1.1 304 Not Modified");
exit;
}
/**
* Turn of output buffering
*/
while (ob_get_level()) {
ob_end_clean();
};
/**
* File headers
*/
if ($type === 'css') {
header("Content-Type: text/css", true);
} else {
header("Content-Type: application/javascript", true);
}
header("Last-Modified: " . gmdate("D, d M Y H:i:s", $last_modified) . " GMT");
/**
* Set gzip compression
*/
//if (extension_loaded("zlib") && (ini_get("output_handler") != "ob_gzhandler")) {
//ini_set("zlib.output_compression", 1);
//}
// prevent sniffing of content type
header("X-Content-Type-Options: nosniff", true);
/**
* Custom expire time for url
*/
if (!empty($this->custom_expire) && isset($this->custom_expire[$url])) {
$expire_time = $this->custom_expire[$url];
} else {
$expire_time = $this->default_cache_expire;
}
/**
* Cache headers
*/
header("Pragma: cache");
header("Cache-Control: max-age=".$expire_time.", public");
header("Expires: " . gmdate("D, d M Y H:i:s", ($last_modified + $expire_time)) . " GMT");
readfile($cache_file);
exit;
}
/**
* Proxy resource
*/
public function proxy_resource($url, $type, $debugExit = false)
{
if (!in_array($type, array('js','css'))) {
if ($debugExit) {
$this->error('Invalid proxy resource type');
}
return false;
}
// parse url
$parsed = $this->parse_url($url, true);
if (!$parsed) {
return false;
}
list($url, $filehash, $local_file) = $parsed;
/**
* File does not match include list, ignore
*/
if (!$this->url_include($url, $type)) {
if ($debugExit) {
$this->forbidden('The resource is not specifically included via the include list.');
}
return false;
}
/**
* File matches exclude list, ignore
*/
if ($this->url_exclude($url, $type)) {
if ($debugExit) {
$this->forbidden('The resource is excluded via the exclude list.');
}
return false;
}
// cache file
$cache_file = $this->cache_file_path($filehash, $type);
/**
* Return cache file
*/
if (file_exists($cache_file)) {
// check if cache file is expired
if (!$this->cache_file_expired($cache_file, $url)) {
return array($filehash,$cache_file, $url);
}
}
// verify local file
if ($local_file) {
/**
* Detect mime type of file
*/
$mime = mime_content_type($local_file);
if (!$mime) {
// failed
// @todo test support / stability in all environments
if ($debugExit) {
$this->forbidden('The local javascript resource does not have a valid mimetype.
File: '.str_replace(ABSPATH, '[HIDDEN]/', $local_file).'
Mime Type: '.$mime.'');
}
return false;
}
/**
* Make sure file has valid mime type
*/
if ($type === 'js') {
// valid javascript mime type?
if (!in_array($mime, $this->js_mimetypes) && !(substr($local_file, -3) === '.js' && substr($mime, 0, 5) === 'text/')) {
if ($debugExit) {
$this->forbidden('The local javascript resource does not have a valid mimetype.
File: '.str_replace(ABSPATH, '[HIDDEN]/', $local_file).'
Mime Type: '.$mime.'');
}
return false;
}
} elseif ($type === 'css') {
// valid CSS mime type?
if (!in_array($mime, $this->css_mimetypes) && !(substr($local_file, -4) === '.css' && substr($mime, 0, 5) === 'text/')) {
if ($debugExit) {
$this->forbidden('The local CSS resource does not have a valid mimetype.
File: '.str_replace(ABSPATH, '[HIDDEN]/', $local_file) . '
Mime Type: '.$mime.'');
}
return false;
}
}
}
/**
* External file? Require proxy to be enabled
*/
if (!$local_file && (!isset($this->CTRL->options[$type . '_proxy']) || !$this->CTRL->options[$type . '_proxy'])) {
if ($debugExit) {
$this->forbidden('The proxy is not enabled for file type '.$type);
}
return false;
}
/**
* Download file
*/
if ($local_file) {
$file_data = file_get_contents($local_file);
} else {
$file_data = $this->CTRL->remote_get($url);
}
/**
* Add proxy identification header (and increase security)
*/
if ($file_data) {
if (!empty($this->custom_expire) && isset($this->custom_expire[$url])) {
$expire_time = $this->custom_expire[$url];
} else {
$expire_time = $this->default_cache_expire;
}
$file_data = "/** " . (($type === 'js') ? 'Javascript' : 'CSS') . " Proxy / Above The Fold Optimization v".WPABTF_VERSION."\n * @url ".$url."\n * @expire ".date("Y/m/d H:i:s", (time() + $expire_time))." */\n" . $file_data;
}
/**
* Apply optimization filters to resource content
*/
$file_data = apply_filters('abtf_css', $file_data);
if ($file_data) {
$this->CTRL->file_put_contents($cache_file, $file_data);
} else {
if ($debugExit) {
$this->error('Failed to proxy file ' . htmlentities($url, ENT_COMPAT, 'utf-8'));
}
}
return array($filehash,$cache_file,$url);
}
/**
* Parse url
*/
public function parse_url($url, $x = false)
{
$url = trim($url);
/**
* Translate protocol relative url
*/
if (substr($url, 0, 2) === '//') {
// prefix url with protocol
$url = ((isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off') ? 'https:' : 'http:') . $url;
}
/**
* Handle local file
*/
$local_file = false;
// http(s):// based file, match host with server host
if (strpos($url, '://') !== false) {
$http_prefix = false;
$prefix_match = substr($url, 0, 6);
if ($prefix_match === 'https:') {
// HTTPS
$http_prefix = 'https://';
} elseif ($prefix_match === 'http:/') {
// HTTPS
$http_prefix = 'http://';
} else {
/**
* Invalid protocol
* @security
*/
return false;
}
$parsed_url = parse_url($url);
if ($this->is_local($parsed_url, $url) || (!empty($this->cdn_hosts) && in_array($parsed_url['host'], $this->cdn_hosts))) {
// local file
$url = str_ireplace($http_prefix . $parsed_url['host'], '', $url);
}
}
// local file
if (strpos($url, '://') === false) {
// remove query string
if (strpos($url, '?') !== false) {
$url = substr($url, 0, strpos($url, "?"));
}
// remove hash
if (strpos($url, '#') !== false) {
$url = substr($url, 0, strpos($url, "#"));
}
// get real path for url
if (substr($url, 0, 1) === '/') {
$url = substr($url, 1);
}
$resource_path = realpath($this->abspath . $url);
/**
* Make sure resource is in WordPress root
* @security
*/
if (strpos($resource_path, $this->abspath) === false || !file_exists($resource_path)) {
return false;
}
// create file hash based on file contents (force browser cache update on file changes)
$filehash = md5_file($resource_path);
return array($url, $filehash, $resource_path);
} else {
// translate url
$url = $this->regex_translate_url($url);
// file hash based on url
$filehash = md5($url);
return array($url, $filehash, false);
}
}
/**
* Translate url based on regex config
*/
public function regex_translate_url($url)
{
if (empty($this->regex_url_translation)) {
return $url;
}
foreach ($this->regex_url_translation as $matchurl => $regex) {
if (preg_match('|'.str_replace('|', '\\|', $regex[0]).'|' . $regex[1], $url)) {
return $matchurl;
}
}
return $url;
}
/**
* Return cache hash for url
*/
public function cache_hash($url, $type, $urlExpiredCheck = false)
{
$parsed = $this->parse_url($url);
if ($parsed) {
$cache_path = $this->cache_file_path($parsed[1], $type, false);
if (!$cache_path) {
return false;
}
// check if cache file is expired
if ($urlExpiredCheck && $this->cache_file_expired($cache_path, $urlExpiredCheck)) {
return false;
}
return $parsed[1];
}
// not in cache
return false;
}
/**
* Match url against include list
*/
public function url_include($url, $type)
{
/**
* Require proxy to be enabled
*/
if (!isset($this->CTRL->options[$type . '_proxy']) || !$this->CTRL->options[$type . '_proxy']) {
return false;
}
$include_key = $type . '_include';
/**
* Include list empty, include all
*/
if (empty($this->$include_key)) {
return true;
}
/**
* Match url against include list
*/
foreach ($this->$include_key as $str) {
if (strpos($url, $str) !== false) {
return true;
}
}
return false;
}
/**
* Match url against exclude list
*/
public function url_exclude($url, $type)
{
/**
* Require proxy to be enabled
*/
if (!isset($this->CTRL->options[$type . '_proxy']) || !$this->CTRL->options[$type . '_proxy']) {
return false;
}
$exclude_key = $type . '_exclude';
/**
* Exclude list empty, exclude none
*/
if (empty($this->$exclude_key)) {
return false;
}
/**
* Match url against exclude list
*/
foreach ($this->$exclude_key as $str) {
if (strpos($url, $str) !== false) {
return true;
}
}
return false;
}
/**
* Javascript client settings
*/
public function client_jssettings(&$jssettings, &$jsfiles, $jsdebug)
{
$proxyindex = $this->CTRL->optimization->client_config_ref['proxy'];
$proxyindexsub = $this->CTRL->optimization->client_config_ref['proxy-sub'];
/**
* Proxy settings
*/
$proxy_url = $this->url();
$jssettings[$proxyindex] = array(
$proxyindexsub['url'] => $proxy_url,
$proxyindexsub['js'] => (isset($this->CTRL->options['js_proxy']) && $this->CTRL->options['js_proxy']) ? true : false,
$proxyindexsub['css'] => (isset($this->CTRL->options['css_proxy']) && $this->CTRL->options['css_proxy']) ? true : false
);
if ($this->cdn) {
$jssettings[$proxyindex][$proxyindexsub['cdn']] = trailingslashit($this->cdn);
}
/**
* Preload urls
*/
$preload_hashes = array();
if (isset($this->CTRL->options['css_proxy']) && $this->CTRL->options['css_proxy'] && !empty($this->CTRL->proxy->css_preload)) {
foreach ($this->CTRL->proxy->css_preload as $url) {
$preload[] = $url;
}
}
if (isset($this->CTRL->options['js_proxy']) && $this->CTRL->options['js_proxy'] && !empty($this->CTRL->proxy->js_preload)) {
foreach ($this->CTRL->proxy->js_preload as $url) {
$preload[] = $url;
}
}
if (!empty($preload)) {
$jssettings[$proxyindex][$proxyindexsub['preload']] = $preload;
}
// base path
$jssettings[$proxyindex][$proxyindexsub['base']] = $this->CTRL->cache_dir('proxy');
$keys = array('js_include','css_include','js_exclude','css_exclude');
foreach ($keys as $key) {
$params = explode('_', $key);
if ($this->CTRL->options[$params[0] . '_proxy'] && is_array($this->CTRL->proxy->$key) && !empty($this->CTRL->proxy->$key)) {
$jssettings[$proxyindex][$proxyindexsub[$key]] = $this->CTRL->proxy->$key;
}
}
// fill empty array values to preserve JSON array format
$max = 0;
foreach ($jssettings[$proxyindex] as $index => $value) {
if ($index > $max) {
$max = $index;
}
}
if ($max > 0) {
for ($i = 0; $i <= $max; $i++) {
if (!isset($jssettings[$proxyindex][$i])) {
$jssettings[$proxyindex][$i] = -1;
}
}
ksort($jssettings[$proxyindex]);
}
$jsfiles[] = WPABTF_PATH . 'public/js/abovethefold-proxy'.$jsdebug.'.min.js';
}
/**
* Prune expired cache entries
*/
public function prune($stats_only = false)
{
// age to delete cache file
$prune_age = 30 * 86400; // 1 month
$prune_time = (time() - $prune_age);
$file_count = 0;
$file_size = 0;
$deleted_count = 0;
$cache_path = $this->CTRL->cache_path('proxy');
$root_dir = array_diff(scandir($cache_path), array('..', '.'));
foreach ($root_dir as $dirA) {
if (strlen($dirA) === 2 && is_dir($cache_path . $dirA . '/')) {
$A_dir = array_diff(scandir($cache_path . $dirA . '/'), array('..', '.'));
foreach ($A_dir as $dirB) {
if (strlen($dirB) === 2 && is_dir($cache_path . $dirA . '/' . $dirB . '/')) {
$C_dir = array_diff(scandir($cache_path . $dirA . '/' . $dirB . '/'), array('..', '.'));
foreach ($C_dir as $dirC) {
if (strlen($dirC) === 2 && is_dir($cache_path . $dirA . '/' . $dirB . '/' . $dirC . '/')) {
$C_cache_path = $cache_path . $dirA . '/' . $dirB . '/' . $dirC . '/';
$cache_files = array_diff(scandir($C_cache_path), array('..', '.'));
foreach ($cache_files as $file) {
// date created
$date_created = filemtime($C_cache_path . $file);
// older than min age, delete cache file
if ($date_created < $prune_time) {
if (!$stats_only) {
@unlink($C_cache_path . $file);
$deleted_count++;
}
} else {
$file_count++;
$file_size += filesize($C_cache_path . $file);
}
}
}
}
}
}
}
}
// add warning for admin
if ($file_count > 500) {
$this->CTRL->admin->set_notice('Above The Fold Optimization
The Proxy Cache directory contains '.number_format($file_count, 0, '.', ',').' cache entries. This may indicate that auto-capture captures a script with a changing url that causes a new cache entry to be created on each request.
The Proxy configuration page shows a solution to capture scripts with a changing url using a JSON config object.
', 'ERROR', array(
'date' => time(),
'expire' => (60 * 2)
));
}
// empty cache directory when reaching > 5,000 files
if ($file_count > 5000) {
$this->empty_cache();
$this->CTRL->admin->set_notice('Above The Fold Optimization
The Proxy Cache directory reached '.number_format($file_count, 0, '.', ',').' cache entries. The cache directory has been emptied.
', 'ERROR', array(
'date' => time(),
'expire' => (60 * 2)
));
$deleted_count = $file_count + $deleted_count;
$file_size = $file_count = 0;
}
// update proxy stats
$stats = get_option('abovethefold-proxy-stats');
if (!is_array($stats)) {
$stats = array();
}
$stats['files'] = $file_count;
$stats['size'] = $file_size;
$stats['deleted'] = $deleted_count;
$stats['date'] = time();
update_option('abovethefold-proxy-stats', $stats, false);
return $stats;
}
/**
* Empty cache directory
*/
public function empty_cache()
{
$cache_path = $this->CTRL->cache_path('proxy');
$root_dir = array_diff(scandir($cache_path), array('..', '.'));
foreach ($root_dir as $dirA) {
$this->CTRL->rmdir($cache_path . $dirA . '/');
}
$this->prune(true);
}
/**
* Get proxy cache stats
*/
public function cache_stats()
{
$stats = get_option('abovethefold-proxy-stats');
if (is_array($stats) && isset($stats['date']) && intval($stats['date']) > (time() - (60 * 60))) {
return $stats;
}
return $this->prune(true);
}
/**
* Cron prune method
*/
public function cron_prune()
{
// cron logfile
$cache_path = $this->CTRL->cache_path('proxy');
$cronlog = $cache_path . 'cleanup_cron.log';
$this->CTRL->file_put_contents($cronlog, 'start: ' . date('r'));
// prune cache
$stats = $this->prune(false);
// log result
$this->CTRL->file_put_contents($cronlog, 'completed: ' . date('r') . "\nDeleted: " . $stats['deleted'] . "\nFiles: " . $stats['files'] . "\nSize: " . $stats['size']);
}
}