%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
/**
* Class for JS optimization.
*/
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
class autoptimizeScripts extends autoptimizeBase
{
/**
* Stores founds scripts.
*
* @var array
*/
private $scripts = array();
/**
* Stores to be moved JS.
*
* @var array
*/
private $move = array(
'first' => array(),
'last' => array(),
);
/**
* List of not to be moved JS.
*
* @var array
*/
private $dontmove = array(
'document.write',
'html5.js',
'show_ads.js',
'google_ad',
'histats.com/js',
'statcounter.com/counter/counter.js',
'ws.amazon.com/widgets',
'media.fastclick.net',
'/ads/',
'comment-form-quicktags/quicktags.php',
'edToolbar',
'intensedebate.com',
'scripts.chitika.net/',
'_gaq.push',
'jotform.com/',
'admin-bar.min.js',
'GoogleAnalyticsObject',
'plupload.full.min.js',
'syntaxhighlighter',
'adsbygoogle',
'gist.github.com',
'_stq',
'nonce',
'post_id',
'data-noptimize',
'data-cfasync',
'data-pagespeed-no-defer',
'logHuman',
'amp-mobile-version-switcher',
'data-rocketlazyloadscript',
'rocket-browser-checker-js-after',
);
/**
* List of to be moved JS.
*
* @var array
*/
private $domove = array(
'gaJsHost',
'load_cmc',
'jd.gallery.transitions.js',
'swfobject.embedSWF(',
'tiny_mce.js',
'tinyMCEPreInit.go',
);
/**
* List of JS that can be moved last (not used any more).
*
* @var array
*/
private $domovelast = array(
'addthis.com',
'/afsonline/show_afs_search.js',
'disqus.js',
'networkedblogs.com/getnetworkwidget',
'infolinks.com/js/',
'jd.gallery.js.php',
'jd.gallery.transitions.js',
'swfobject.embedSWF(',
'linkwithin.com/widget.js',
'tiny_mce.js',
'tinyMCEPreInit.go',
);
/**
* Setting CDN base URL.
*
* @var string
*/
public $cdn_url = '';
/**
* Setting; aggregate or not.
*
* @var bool
*/
private $aggregate = true;
/**
* Setting; if not aggregated, should we defer?
*
* @var bool
*/
private $defer_not_aggregate = false;
/**
* Setting; defer inline JS?
*
* @var bool
*/
private $defer_inline = false;
/**
* Setting; try/catch wrapping or not.
*
* @var bool
*/
private $trycatch = false;
/**
* State; is JS already minified.
*
* @var bool
*/
private $alreadyminified = false;
/**
* Setting; force JS in head or not.
*
* @var bool
*/
private $forcehead = true;
/**
* Setting; aggregate inline JS or not.
*
* @var bool
*/
private $include_inline = false;
/**
* State; holds JS code.
*
* @var string
*/
private $jscode = '';
/**
* State; holds URL of JS-file.
*
* @var string
*/
private $url = '';
/**
* State; stores rest of HTML if (old) option "only in head" is on.
*
* @var string
*/
private $restofcontent = '';
/**
* State; holds md5-hash.
*
* @var string
*/
private $md5hash = '';
/**
* Setting (filter); allowlist of to be aggregated JS.
*
* @var string
*/
private $allowlist = '';
/**
* Setting (filter); holds JS that should be removed.
*
* @var array
*/
private $jsremovables = array();
/**
* Setting (filter); can we inject already minified files after the
* unminified aggregate JS has been minified.
*
* @var bool
*/
private $inject_min_late = true;
/**
* Setting; should excluded JS be minified (if not already).
*
* @var bool
*/
private $minify_excluded = true;
/**
* Reads the page and collects script tags.
*
* @param array $options all options.
*/
public function read( $options )
{
$noptimize_js = false;
// If page/ post check post_meta to see if optimize is off.
if ( false === autoptimizeConfig::get_post_meta_ao_settings( 'ao_post_js_optimize' ) ) {
$noptimize_js = true;
}
// And a filter to enforce JS noptimize.
$noptimize_js = apply_filters( 'autoptimize_filter_js_noptimize', $noptimize_js, $this->content );
// And finally bail if noptimize_js is true.
if ( $noptimize_js ) {
return false;
}
// only optimize known good JS?
$allowlist_js = apply_filters( 'autoptimize_filter_js_allowlist', '', $this->content );
if ( ! empty( $allowlist_js ) ) {
$this->allowlist = array_filter( array_map( 'trim', explode( ',', $allowlist_js ) ) );
}
// is there JS we should simply remove?
$removable_js = apply_filters( 'autoptimize_filter_js_removables', '', $this->content );
if ( ! empty( $removable_js ) ) {
$this->jsremovables = array_filter( array_map( 'trim', explode( ',', $removable_js ) ) );
}
// only header?
if ( apply_filters( 'autoptimize_filter_js_justhead', $options['justhead'] ) ) {
$content = explode( '</head>', $this->content, 2 );
$this->content = $content[0] . '</head>';
$this->restofcontent = $content[1];
}
// Determine whether we're doing JS-files aggregation or not.
if ( ! $options['aggregate'] ) {
$this->aggregate = false;
}
// Returning true for "dontaggregate" turns off aggregation.
if ( $this->aggregate && apply_filters( 'autoptimize_filter_js_dontaggregate', false ) ) {
$this->aggregate = false;
}
// and the filter that should have been there to begin with.
$this->aggregate = apply_filters( 'autoptimize_filter_js_aggregate', $this->aggregate );
// Defer when not aggregating.
if ( false === $this->aggregate && apply_filters( 'autoptimize_filter_js_defer_not_aggregate', $options['defer_not_aggregate'] ) ) {
$this->defer_not_aggregate = true;
}
// Defer inline JS?
if ( ( true === $this->defer_not_aggregate && apply_filters( 'autoptimize_js_filter_defer_inline', $options['defer_inline'] ) ) || apply_filters( 'autoptimize_js_filter_force_defer_inline', false ) ) {
$this->defer_inline = true;
}
// include inline?
if ( apply_filters( 'autoptimize_js_include_inline', $options['include_inline'] ) ) {
$this->include_inline = true;
}
// filter to "late inject minified JS", default to true for now (it is faster).
$this->inject_min_late = apply_filters( 'autoptimize_filter_js_inject_min_late', true );
// filters to override hardcoded do(nt)move(last) array contents (array in, array out!).
$this->dontmove = apply_filters( 'autoptimize_filter_js_dontmove', $this->dontmove );
$this->domovelast = apply_filters( 'autoptimize_filter_js_movelast', $this->domovelast );
$this->domove = apply_filters( 'autoptimize_filter_js_domove', $this->domove );
// Determine whether excluded files should be minified if not yet so.
if ( ! $options['minify_excluded'] && $options['aggregate'] ) {
$this->minify_excluded = false;
}
$this->minify_excluded = apply_filters( 'autoptimize_filter_js_minify_excluded', $this->minify_excluded, '' );
// get extra exclusions settings or filter.
$exclude_js = $options['js_exclude'];
$exclude_js = apply_filters( 'autoptimize_filter_js_exclude', $exclude_js, $this->content );
if ( '' !== $exclude_js ) {
if ( is_array( $exclude_js ) ) {
$remove_keys = array_keys( $exclude_js, 'remove' );
if ( false !== $remove_keys ) {
foreach ( $remove_keys as $remove_key ) {
unset( $exclude_js[ $remove_key ] );
$this->jsremovables[] = $remove_key;
}
}
$excl_js_arr = array_keys( $exclude_js );
} else {
$excl_js_arr = array_filter( array_map( 'trim', explode( ',', $exclude_js ) ) );
}
$this->dontmove = array_merge( $excl_js_arr, $this->dontmove );
}
// Should we add try-catch?
if ( $options['trycatch'] ) {
$this->trycatch = true;
}
// force js in head?
if ( $options['forcehead'] ) {
$this->forcehead = true;
} else {
$this->forcehead = false;
}
$this->forcehead = apply_filters( 'autoptimize_filter_js_forcehead', $this->forcehead );
// get cdn url.
$this->cdn_url = $options['cdn_url'];
// noptimize me.
$this->content = $this->hide_noptimize( $this->content );
// Save IE hacks.
$this->content = $this->hide_iehacks( $this->content );
// comments.
$this->content = $this->hide_comments( $this->content );
// Get script files.
if ( preg_match_all( '#<script.*</script>#Usmi', $this->content, $matches ) ) {
foreach ( $matches[0] as $tag ) {
// only consider script aggregation for types allowlisted in should_aggregate-function.
$should_aggregate = $this->should_aggregate( $tag );
if ( ! $should_aggregate ) {
$tag = '';
continue;
}
if ( preg_match( '#<script[^>]*src=("|\')([^>]*)("|\')#Usmi', $tag, $source ) ) {
// non-inline script.
if ( $this->isremovable( $tag, $this->jsremovables ) ) {
$this->content = str_replace( $tag, '', $this->content );
continue;
}
$orig_tag = null;
$url = current( explode( '?', $source[2], 2 ) );
$path = $this->getpath( $url );
if ( false !== $path && preg_match( '#\.js$#', $path ) && $this->ismergeable( $tag ) ) {
// ok to optimize, add to array.
$this->scripts[] = $path;
} else {
$orig_tag = $tag;
$new_tag = $tag;
// non-mergeable script (excluded or dynamic or external).
if ( is_array( $exclude_js ) ) {
// should we add flags?
foreach ( $exclude_js as $excl_tag => $excl_flags ) {
if ( false !== strpos( $orig_tag, $excl_tag ) && in_array( $excl_flags, array( 'async', 'defer' ) ) ) {
$new_tag = str_replace( '<script ', '<script ' . $excl_flags . ' ', $new_tag );
}
}
}
// not aggregating but deferring?
if ( $this->defer_not_aggregate && false === $this->aggregate && ( str_replace( $this->dontmove, '', $path ) === $path || ( apply_filters( 'autoptimize_filter_js_defer_external', true ) && str_replace( $this->dontmove, '', $orig_tag ) === $orig_tag ) ) && strpos( $new_tag, ' defer' ) === false && strpos( $new_tag, ' async' ) === false ) {
$new_tag = str_replace( '<script ', '<script defer ', $new_tag );
}
// Should we minify the non-aggregated script?
// -> if aggregate is on and exclude minify is on
// -> if aggregate is off and the file is not in dontmove.
if ( $path && $this->minify_excluded ) {
$consider_minified_array = apply_filters( 'autoptimize_filter_js_consider_minified', false );
if ( ( false === $this->aggregate && str_replace( $this->dontmove, '', $path ) === $path ) || ( true === $this->aggregate && ( false === $consider_minified_array || str_replace( $consider_minified_array, '', $path ) === $path ) ) ) {
$minified_url = $this->minify_single( $path );
if ( ! empty( $minified_url ) ) {
// Replace original URL with minified URL from cache.
$new_tag = str_replace( $url, $minified_url, $new_tag );
} elseif ( apply_filters( 'autoptimize_filter_ccsjs_remove_empty_minified_url', false ) ) {
// Remove the original script tag, because cache content is empty but only if filter
// is trued because $minified_url is also false if original JS is minified already.
$new_tag = '';
}
}
}
// Check if we still need to CDN (esp. for already minified resources).
if ( ! empty( $this->cdn_url ) || has_filter( 'autoptimize_filter_base_replace_cdn' ) ) {
$new_tag = str_replace( $url, $this->url_replace_cdn( $url ), $new_tag );
}
if ( $this->ismovable( $new_tag ) ) {
// can be moved, flags and all.
if ( $this->movetolast( $new_tag ) ) {
$this->move['last'][] = $new_tag;
} else {
$this->move['first'][] = $new_tag;
}
} else {
// cannot be moved, so if flag was added re-inject altered tag immediately.
if ( ( '' !== $new_tag && $orig_tag !== $new_tag ) || ( '' === $new_tag && apply_filters( 'autoptimize_filter_js_remove_empty_files', false ) ) ) {
$this->content = str_replace( $orig_tag, $new_tag, $this->content );
$orig_tag = '';
}
// and forget about the $tag (not to be touched any more).
$tag = '';
}
}
} else {
// Inline script.
if ( $this->isremovable( $tag, $this->jsremovables ) ) {
$this->content = str_replace( $tag, '', $this->content );
continue;
}
// unhide comments, as javascript may be wrapped in comment-tags for old times' sake.
$tag = $this->restore_comments( $tag );
if ( $this->ismergeable( $tag ) && $this->include_inline ) {
preg_match( '#<script.*>(.*)</script>#Usmi', $tag, $code );
$code = preg_replace( '#.*<!\[CDATA\[(?:\s*\*/)?(.*)(?://|/\*)\s*?\]\]>.*#sm', '$1', $code[1] );
$code = preg_replace( '/(?:^\\s*<!--\\s*|\\s*(?:\\/\\/)?\\s*-->\\s*$)/', '', $code );
$this->scripts[] = 'INLINE;' . $code;
} else {
$_inline_deferable = apply_filters( 'autoptimize_filters_js_inline_deferable', array( 'nonce', 'post_id', 'syntaxhighlighter' ) );
$_inline_dontmove = array_values( array_diff( $this->dontmove, $_inline_deferable ) );
if ( false === $this->defer_inline ) {
// Can we move this?
$autoptimize_js_moveable = apply_filters( 'autoptimize_js_moveable', '', $tag );
if ( $this->ismovable( $tag ) || '' !== $autoptimize_js_moveable ) {
if ( $this->movetolast( $tag ) || 'last' === $autoptimize_js_moveable ) {
$this->move['last'][] = $tag;
} else {
$this->move['first'][] = $tag;
}
} else {
$tag = '';
}
} else if ( str_replace( $_inline_dontmove, '', $tag ) === $tag ) {
// defer inline JS by base64 encoding it.
// preg_match( '#<script.*>(.*)</script>#Usmi', $tag, $match );
preg_match( '#<script(?:[^>](?!id=))*\s*(?:id=(["\'])([^"\']+)\1)*+[^>]*+>(.*?)<\/script>#is', $tag, $match );
if ( $match[2] ) {
$_id = 'id="' . $match[2] . '" ';
} else {
$_id = '';
}
$new_tag = '<script defer ' . $_id . 'src="data:text/javascript;base64,' . base64_encode( $match[3] ) . '"></script>';
$this->content = str_replace( $tag, $new_tag, $this->content );
$tag = '';
} else {
$tag = '';
}
}
// Re-hide comments to be able to do the removal based on tag from $this->content.
$tag = $this->hide_comments( $tag );
}
// Remove the original script tag.
$this->content = str_replace( $tag, '', $this->content );
}
return true;
}
// No script files, great ;-) .
return false;
}
/**
* Determines wheter a certain `<script>` $tag should be aggregated or not.
*
* We consider these as "aggregation-safe" currently:
* - script tags without a `type` attribute
* - script tags with these `type` attribute values: `text/javascript`, `text/ecmascript`, `application/javascript`,
* and `application/ecmascript`
*
* Everything else should return false.
*
* @link https://developer.mozilla.org/en/docs/Web/HTML/Element/script#attr-type
*
* @param string $tag Script node & child(ren).
* @return bool
*/
public static function should_aggregate( $tag )
{
if ( empty( $tag ) ) {
return false;
}
// We're only interested in the type attribute of the <script> tag itself, not any possible
// inline code that might just contain the 'type=' string...
$tag_parts = array();
preg_match( '#<(script[^>]*)>#i', $tag, $tag_parts );
$tag_without_contents = null;
if ( ! empty( $tag_parts[1] ) ) {
$tag_without_contents = $tag_parts[1];
}
$has_type = ( strpos( $tag_without_contents, 'type' ) !== false );
$type_valid = false;
if ( $has_type ) {
$type_valid = (bool) preg_match( '/type\s*=\s*[\'"]?(?:text|application)\/(?:javascript|ecmascript)[\'"]?/i', $tag_without_contents );
}
$should_aggregate = false;
if ( ! $has_type || $type_valid ) {
$should_aggregate = true;
}
return $should_aggregate;
}
/**
* Joins and optimizes JS.
*/
public function minify()
{
foreach ( $this->scripts as $script ) {
if ( empty( $script ) ) {
continue;
}
// TODO/FIXME: some duplicate code here, can be reduced/simplified.
if ( preg_match( '#^INLINE;#', $script ) ) {
// Inline script.
$script = preg_replace( '#^INLINE;#', '', $script );
$script = rtrim( $script, ";\n\t\r" ) . ';';
// Add try-catch?
if ( $this->trycatch ) {
$script = 'try{' . $script . '}catch(e){}';
}
$tmpscript = apply_filters( 'autoptimize_js_individual_script', $script, '' );
if ( has_filter( 'autoptimize_js_individual_script' ) && ! empty( $tmpscript ) ) {
$script = $tmpscript;
$this->alreadyminified = true;
}
$this->jscode .= "\n" . $script;
} else {
// External script.
if ( false !== $script && file_exists( $script ) && is_readable( $script ) ) {
$scriptsrc = file_get_contents( $script );
$scriptsrc = preg_replace( '/\x{EF}\x{BB}\x{BF}/', '', $scriptsrc );
$scriptsrc = rtrim( $scriptsrc, ";\n\t\r" ) . ';';
// Add try-catch?
if ( $this->trycatch ) {
$scriptsrc = 'try{' . $scriptsrc . '}catch(e){}';
}
$tmpscriptsrc = apply_filters( 'autoptimize_js_individual_script', $scriptsrc, $script );
if ( has_filter( 'autoptimize_js_individual_script' ) && ! empty( $tmpscriptsrc ) ) {
$scriptsrc = $tmpscriptsrc;
$this->alreadyminified = true;
} elseif ( $this->can_inject_late( $script ) ) {
$scriptsrc = self::build_injectlater_marker( $script, md5( $scriptsrc ) );
}
$this->jscode .= "\n" . $scriptsrc;
}
}
}
// Check for already-minified code.
$this->md5hash = md5( $this->jscode );
$ccheck = new autoptimizeCache( $this->md5hash, 'js' );
if ( $ccheck->check() ) {
$this->jscode = $ccheck->retrieve();
return true;
}
unset( $ccheck );
// $this->jscode has all the uncompressed code now.
if ( true !== $this->alreadyminified ) {
if ( apply_filters( 'autoptimize_js_do_minify', true ) ) {
$tmp_jscode = trim( JSMin::minify( $this->jscode ) );
if ( ! empty( $tmp_jscode ) ) {
$this->jscode = $tmp_jscode;
unset( $tmp_jscode );
}
$this->jscode = $this->inject_minified( $this->jscode );
$this->jscode = apply_filters( 'autoptimize_js_after_minify', $this->jscode );
return true;
} else {
$this->jscode = $this->inject_minified( $this->jscode );
return false;
}
}
$this->jscode = apply_filters( 'autoptimize_js_after_minify', $this->jscode );
return true;
}
/**
* Caches the JS in uncompressed, deflated and gzipped form.
*/
public function cache()
{
$cache = new autoptimizeCache( $this->md5hash, 'js' );
if ( ! $cache->check() ) {
// Cache our code.
$cache->cache( $this->jscode, 'text/javascript' );
}
$this->url = AUTOPTIMIZE_CACHE_URL . $cache->getname();
$this->url = $this->url_replace_cdn( $this->url );
}
/**
* Returns the content.
*/
public function getcontent()
{
// Restore the full content.
if ( ! empty( $this->restofcontent ) ) {
$this->content .= $this->restofcontent;
$this->restofcontent = '';
}
// Add the scripts taking forcehead/ deferred (default) into account.
if ( $this->forcehead ) {
$replace_tag = array( '</head>', 'before' );
$defer = '';
} else {
$replace_tag = array( '</body>', 'before' );
$defer = 'defer ';
}
$defer = apply_filters( 'autoptimize_filter_js_defer', $defer );
$type_js = '';
if ( apply_filters( 'autoptimize_filter_cssjs_addtype', false ) ) {
$type_js = 'type="text/javascript" ';
}
$bodyreplacementpayload = '<script ' . $type_js . $defer . 'src="' . $this->url . '"></script>';
$bodyreplacementpayload = apply_filters( 'autoptimize_filter_js_bodyreplacementpayload', $bodyreplacementpayload );
$bodyreplacement = implode( '', $this->move['first'] );
$bodyreplacement .= $bodyreplacementpayload;
$bodyreplacement .= implode( '', $this->move['last'] );
$replace_tag = apply_filters( 'autoptimize_filter_js_replacetag', $replace_tag );
if ( strlen( $this->jscode ) > 0 ) {
$this->inject_in_html( $bodyreplacement, $replace_tag );
}
// Restore comments.
$this->content = $this->restore_comments( $this->content );
// Restore IE hacks.
$this->content = $this->restore_iehacks( $this->content );
// Restore noptimize.
$this->content = $this->restore_noptimize( $this->content );
// Return the modified HTML.
return $this->content;
}
/**
* Checks against the allow- and blocklists.
*
* @param string $tag JS tag.
*/
private function ismergeable( $tag )
{
if ( empty( $tag ) || ! $this->aggregate ) {
return false;
}
if ( ! empty( $this->allowlist ) ) {
foreach ( $this->allowlist as $match ) {
if ( false !== strpos( $tag, $match ) ) {
return true;
}
}
// No match with allowlist.
return false;
} else {
foreach ( $this->domove as $match ) {
if ( false !== strpos( $tag, $match ) ) {
// Matched something.
return false;
}
}
if ( $this->movetolast( $tag ) ) {
return false;
}
foreach ( $this->dontmove as $match ) {
if ( false !== strpos( $tag, $match ) ) {
// Matched something.
return false;
}
}
// If we're here it's safe to merge.
return true;
}
}
/**
* Checks agains the blocklist.
*
* @param string $tag tag to check for blocklist (exclusions).
*/
private function ismovable( $tag )
{
if ( empty( $tag ) || true !== $this->include_inline || apply_filters( 'autoptimize_filter_js_unmovable', true ) ) {
return false;
}
foreach ( $this->domove as $match ) {
if ( false !== strpos( $tag, $match ) ) {
// Matched something.
return true;
}
}
if ( $this->movetolast( $tag ) ) {
return true;
}
foreach ( $this->dontmove as $match ) {
if ( false !== strpos( $tag, $match ) ) {
// Matched something.
return false;
}
}
// If we're here it's safe to move.
return true;
}
private function movetolast( $tag )
{
if ( empty( $tag ) ) {
return false;
}
foreach ( $this->domovelast as $match ) {
if ( false !== strpos( $tag, $match ) ) {
// Matched, return true.
return true;
}
}
// Should be in 'first'.
return false;
}
/**
* Determines wheter a <script> $tag can be excluded from minification (as already minified) based on:
* - inject_min_late being active
* - filename ending in `min.js`
* - filename matching `js/jquery/jquery.js` (WordPress core jquery, is minified)
* - filename matching one passed in the consider minified filter
*
* @param string $js_path Path to JS file.
* @return bool
*/
private function can_inject_late( $js_path ) {
$consider_minified_array = apply_filters( 'autoptimize_filter_js_consider_minified', false );
if ( true !== $this->inject_min_late ) {
// late-inject turned off.
return false;
} elseif ( ( false === strpos( $js_path, 'min.js' ) ) && ( false === strpos( $js_path, 'wp-includes/js/jquery/jquery.js' ) ) && ( str_replace( $consider_minified_array, '', $js_path ) === $js_path ) ) {
// file not minified based on filename & filter.
return false;
} else {
// phew, all is safe, we can late-inject.
return true;
}
}
/**
* Returns whether we're doing aggregation or not.
*
* @return bool
*/
public function aggregating()
{
return $this->aggregate;
}
/**
* Minifies a single local js file and returns its (cached) url.
*
* @param string $filepath Filepath.
* @param bool $cache_miss Optional. Force a cache miss. Default false.
*
* @return bool|string Url pointing to the minified js file or false.
*/
public function minify_single( $filepath, $cache_miss = false )
{
$contents = $this->prepare_minify_single( $filepath );
if ( empty( $contents ) ) {
return false;
}
// Check cache.
$hash = 'single_' . md5( $contents );
$cache = new autoptimizeCache( $hash, 'js' );
// If not in cache already, minify...
if ( ! $cache->check() || $cache_miss ) {
$contents = trim( JSMin::minify( $contents ) );
// Check if minified cache content is empty.
if ( empty( $contents ) ) {
return false;
}
// Filter contents of excluded minified CSS.
$contents = apply_filters( 'autoptimize_filter_js_single_after_minify', $contents );
// Store in cache.
$cache->cache( $contents, 'text/javascript' );
}
$url = $this->build_minify_single_url( $cache );
return $url;
}
}
Zerion Mini Shell 1.0