Ubuntu
replace_tags( $buffer );
}
return $buffer;
}
/**
* Start buffering the output
*
* @since 1.0
*
* @access public
*
*/
public function start_buffer() {
/**
* Don't activate the cookie blocker is AMP is active, but the AMP integration is not enabled
* This problem only occurs for manually included iframes, not for WP generated embeds
*/
if ( cmplz_is_amp_endpoint() && !cmplz_amp_integration_active() ) {
return;
}
ob_start( array( $this, "filter_buffer" ) );
}
/**
* Flush the output buffer
*
* @since 1.0
*
* @access public
*
*/
public function end_buffer() {
/**
* Don't activate the cookie blocker is AMP is active, but the AMP integration is not enabled
*/
if ( cmplz_is_amp_endpoint() && !cmplz_amp_integration_active() ) {
return;
}
if ( ob_get_length() ) {
ob_end_flush();
}
}
/**
* Just before the page is sent to the visitor's browser, remove all tracked third party scripts
*
* @since 1.0
*
* @access public
*
*/
public function replace_tags( $output ) {
/**
* Get style tags
*
* */
$known_style_tags = apply_filters( 'cmplz_known_style_tags', COMPLIANZ::$config->style_tags );
/**
* Get script tags, and add custom user scrripts
*
* */
$known_script_tags = COMPLIANZ::$config->script_tags;
$custom_scripts = cmplz_strip_spaces( cmplz_get_value( 'thirdparty_scripts' ) );
if ( ! empty( $custom_scripts ) && strlen( $custom_scripts ) > 0 ) {
$custom_scripts = array_filter(explode( ',', $custom_scripts ));
$known_script_tags = array_merge( $known_script_tags, $custom_scripts );
}
$known_script_tags = apply_filters( 'cmplz_known_script_tags', $known_script_tags );
/**
* Get dependencies between scripts
* */
$dependencies = apply_filters( 'cmplz_dependencies', COMPLIANZ::$config->dependencies );
/**
* Get async list tags
*
* */
$async_list = apply_filters( 'cmplz_known_async_tags', COMPLIANZ::$config->async_list );
/**
* Get iframe tags, and add custom user iframes
*
* */
$known_iframe_tags = COMPLIANZ::$config->iframe_tags;
$custom_iframes = cmplz_strip_spaces( cmplz_get_value( 'thirdparty_iframes' ) );
if ( ! empty( $custom_iframes ) && strlen( $custom_iframes ) > 0 ) {
$custom_iframes = explode( ',', $custom_iframes );
$known_iframe_tags = array_merge( $known_iframe_tags, $custom_iframes );
}
$known_iframe_tags = apply_filters( 'cmplz_known_iframe_tags', $known_iframe_tags );
$iframe_tags_not_including = apply_filters( 'cmplz_iframe_tags_not_including', array() );
//not meant as a "real" URL pattern, just a loose match for URL type strings.
//edit: instagram uses ;width, so we need to allow ; as well.
$url_pattern = '([\w.,;ß@?^=%&:()\/~+#!\-*]*?)';
/**
* Handle scripts loaded with dns prefetch
*
*
* */
/* $prefetch_pattern = '/]*?>/i';*/
// if (preg_match_all($prefetch_pattern, $output, $matches, PREG_PATTERN_ORDER)) {
// foreach($matches[1] as $key => $prefetch_url){
// $total_match = $matches[0][$key];
// if ($this->strpos_arr($prefetch_url, $known_script_tags) !== false) {
// $new = $this->replace_href($total_match);
// $output = str_replace($total_match, $new, $output);
// }
// }
// }
/**
* Handle images from third party services, e.g. google maps
*
*
* */
$image_tags = COMPLIANZ::$config->image_tags;
$image_tags = apply_filters( 'cmplz_image_tags', $image_tags );
$image_pattern = '//s'; //matches multiline with s operater, for FB pixel
if ( preg_match_all( $image_pattern, $output, $matches, PREG_PATTERN_ORDER )
) {
foreach ( $matches[1] as $key => $image_url ) {
$total_match = $matches[0][ $key ];
$found = $this->strpos_arr( $image_url, $image_tags );
if ( $found !== false ) {
$placeholder = cmplz_placeholder( false, $image_url );
$new = $total_match;
$new = $this->add_data( $new, 'img', 'src-cmplz', $image_url );
//remove lazy loading for images, as it is breaking on activation
$new = str_replace('loading="lazy"', 'data-deferlazy="1"', $new );
$new = $this->add_class( $new, 'img', apply_filters( 'cmplz_image_class', 'cmplz-image', $total_match, $found ) );
$new = $this->replace_src( $new, apply_filters( 'cmplz_source_placeholder', $placeholder ) );
$new = apply_filters('cmplz_image_html', $new, $image_url);
if ( cmplz_use_placeholder( $image_url ) ) {
$new = $this->add_class( $new, 'img', " cmplz-placeholder-element " );
$new = '' . $new . '
';
}
$output = str_replace( $total_match, $new, $output );
}
}
}
/**
* Handle styles (e.g. google fonts)
* fonts.google.com has currently been removed in favor of plugin recommendation
*
* */
$style_pattern = '/]*?>/i';
if ( preg_match_all( $style_pattern, $output, $matches, PREG_PATTERN_ORDER ) ) {
foreach ( $matches[1] as $key => $style_url ) {
$total_match = $matches[0][ $key ];
if ( $this->strpos_arr( $style_url, $known_style_tags ) !== false ) {
$new = $this->replace_href( $total_match );
$new = $this->add_class( $new, 'link', 'cmplz-style-element' );
$output = str_replace( $total_match, $new, $output );
}
}
}
/**
* Handle iframes from third parties
*
*
* */
//the iframes URL pattern allows for a space, which may be included in a Google Maps embed.
$url_pattern_iframes = '([\w.,;@?^=%&:()\/~+#!\- *]*?)';
$iframe_pattern = '/<(iframe)[^>].*?src=[\'"](http:\/\/|https:\/\/|\/\/)' . $url_pattern_iframes . '[\'"].*?>.*?<\/iframe>/is';
if ( preg_match_all( $iframe_pattern, $output, $matches, PREG_PATTERN_ORDER ) ) {
foreach ( $matches[0] as $key => $total_match ) {
$iframe_src = $matches[2][ $key ] . $matches[3][ $key ];
if ( $this->strpos_arr( $iframe_src, $known_iframe_tags ) !== false ) {
$placeholder = cmplz_placeholder( false, $iframe_src );
$new = $total_match;
$new = preg_replace( '~strpos_arr($iframe_src, $iframe_tags_not_including )) continue;
//we insert video/no-video class for specific video styling
if ( $this->is_video( $iframe_src ) ) {
$video_class = apply_filters( 'cmplz_video_class', 'cmplz-video cmplz-hidden' );
} else {
$video_class = apply_filters( 'cmplz_video_class', 'cmplz-no-video' );
}
$new = $this->replace_src( $new, apply_filters( 'cmplz_source_placeholder', 'about:blank' ) );
$new = $this->add_class( $new, 'iframe', "cmplz-iframe cmplz-iframe-styles $video_class " );
if ( cmplz_use_placeholder( $iframe_src ) ) {
$new = $this->add_class( $new, 'iframe', " cmplz-placeholder-element " );
$new = $this->add_data( $new, 'iframe', 'placeholder-image', $placeholder );
//allow for integrations to override html
$new = apply_filters( 'cmplz_iframe_html', $new );
//make sure there is a parent element which contains this iframe only, to attach the placeholder to
if ( ! $this->is_video( $iframe_src )
&& ! $this->no_div( $iframe_src )
) {
$new = '' . $new . '
';
}
}
$output = str_replace( $total_match, $new, $output );
}
}
}
/**
* set non iframe placeholders
*
*
* */
if ( cmplz_use_placeholder() ) {
$placeholder_markers = apply_filters( 'cmplz_placeholder_markers', COMPLIANZ::$config->placeholder_markers );
foreach ( $placeholder_markers as $type => $markers ) {
if ( ! is_array( $markers ) ) {
$markers = array( $markers );
}
foreach ( $markers as $marker ) {
$placeholder_pattern
= '/<(a|section|div|blockquote|twitter-widget)*[^>]*class=[\'" ]*[^>]*('
. $marker . ')[\'" ].*?>/i';
if ( preg_match_all( $placeholder_pattern, $output,
$matches, PREG_PATTERN_ORDER )
) {
foreach ( $matches[0] as $key => $html_match ) {
$el = $matches[1][ $key ];
if ( ! empty( $el ) ) {
$placeholder = cmplz_placeholder( $type,
$marker );
$new_html = $this->add_data( $html_match,
$el, 'placeholder-image',
$placeholder );
$new_html = $this->add_class( $new_html,
$el,
'cmplz-noframe cmplz-placeholder-element' );
$output = str_replace( $html_match,
$new_html, $output );
}
}
}
}
}
}
/**
* Handle scripts from third parties
*
*
* */
$script_pattern = '/()(\X*?)<\/script>/is';
$index = 0;
if ( preg_match_all( $script_pattern, $output, $matches,
PREG_PATTERN_ORDER )
) {
foreach ( $matches[1] as $key => $script_open ) {
//we don't block scripts with the cmplz-native class
if ( strpos( $script_open, 'cmplz-native' ) !== false ) {
continue;
}
//exclude ld+json
if ( strpos( $script_open, 'application/ld+json' )
!== false
) {
continue;
}
$total_match = $matches[0][ $key ];
$content = $matches[2][ $key ];
//if there is inline script here, it has some content
if ( ! empty( $content ) ) {
if ( strpos( $content, 'avia_preview' ) !== false ) {
continue;
}
$found = $this->strpos_arr( $content, $known_script_tags );
if ( $found !== false ) {
$new = $total_match;
$new = $this->add_class( $new, 'script', apply_filters( 'cmplz_script_class', 'cmplz-script', $total_match, $found ) );
//native scripts don't have to be blocked
if ( strpos( $new, 'cmplz-native' ) === false ) {
$new = $this->set_javascript_to_plain( $new );
$waitfor = $this->strpos_arr( $content, $dependencies );
if ( $waitfor !== false ) {
$new = $this->add_data( $new, 'script', 'waitfor', $waitfor );
}
}
$output = str_replace( $total_match, $new, $output );
}
}
//when script contains src
$script_src_pattern = '/