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<?php namespace SiteGround_Optimizer\Parser; use SiteGround_Optimizer\Minifier\Minifier; use SiteGround_Optimizer\Options\Options; use SiteGround_Optimizer\Combinator\Css_Combinator; use SiteGround_Optimizer\Combinator\Js_Combinator; use SiteGround_Optimizer\Combinator\Fonts_Optimizer; use SiteGround_Optimizer\DNS\Prefetch; use SiteGround_Optimizer\File_Cacher\File_Cacher; use SiteGround_Optimizer\Ssl\Ssl; use SiteGround_Optimizer\Helper\Helper; /** * Parser functions and main initialization class. */ class Parser { /** * Run the parser. * * @since 5.5.2 * * @param string $html The page html. * * @return string $html The modified html. */ public function run( $html ) { if ( ! preg_match( '/<\/html>/i', $html ) ) { return $html; } // Replace unsecure links if the option is enabled. if ( Options::is_enabled( 'siteground_optimizer_fix_insecure_content' ) ) { $html = Ssl::get_instance()->replace_insecure_links( $html ); } // Do not run optimizations if amp is active, the page is an xml or feed. if ( $this->is_amp_enabled( $html ) || Helper::is_xml( $html ) || is_feed() ) { return $html; } // If the user is logged in and the filebased caching is disabled. if ( is_user_logged_in() ) { // Return the original html if the filebased caching is disabled. if ( ! Options::is_enabled( 'siteground_optimizer_file_caching' ) ) { return $html; } // Return the original html if loggedin filebased caching is disabled. if ( ! Options::is_enabled( 'siteground_optimizer_logged_in_cache' ) ) { return $html; } } $optimized_html = $this->optimize_for_visitors( $html ); if ( Options::is_enabled( 'siteground_optimizer_file_caching' ) ) { File_Cacher::get_instance()->process( $optimized_html ); } return $optimized_html; } /** * Check if specific frontend optimization should be used for visitors. * * @since 5.9.7 * * @param string $html The page html. * * @return string $html The modified html. */ public function optimize_for_visitors( $html ) { if ( Options::is_enabled( 'siteground_optimizer_combine_css' ) ) { $html = Css_Combinator::get_instance()->run( $html ); } if ( Options::is_enabled( 'siteground_optimizer_combine_javascript' ) && ! $this->is_post_request() ) { $html = Js_Combinator::get_instance()->run( $html ); } if ( Options::is_enabled( 'siteground_optimizer_optimize_web_fonts' ) ) { $html = Fonts_Optimizer::get_instance()->run( $html ); } $html = Prefetch::get_instance()->run( $html ); if ( Options::is_enabled( 'siteground_optimizer_optimize_html' ) ) { $html = Minifier::get_instance()->run( $html ); } return $html; } /** * AMP Atribute check. Runs a check if AMP option is enabled * * @since 5.5.8 * * @param string $html The page html. * * @return bool $run_amp_check Wheter the page is loaded via AMP. */ public function is_amp_enabled( $html ) { // Get the first 200 chars of the file to make the preg_match check faster. $is_amp = substr( $html, 0, 200 ); // Cheks if the document is containing the amp tag. return preg_match( '/<html[^>]+(amp|⚡)[^>]*>/', $is_amp ); } /** * Start buffer. * * @since 5.5.0 */ public function start_bufffer() { ob_start( array( $this, 'run' ) ); } /** * End the buffer. * * @since 5.5.0 */ public function end_buffer() { if ( ob_get_length() ) { ob_end_flush(); } } /** * Check if the request is of POST type. * * @since 7.0.2 * * @return boolean true/false if is post request. */ public function is_post_request() { // Return true if is a POST type request. if ( 'POST' === $_SERVER['REQUEST_METHOD'] ) { return true; } return false; } }
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