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<?php |
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/** |
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* GZIP toggle. |
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* |
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* Apache + LiteSpeed: writes/removes a marker block in the site root |
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* .htaccess. Other servers (nginx, IIS): the toggle stores the user's |
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* preference but server config must be edited manually — the UI surfaces |
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* a copy-pasteable snippet via Gzip::manual_snippet(). |
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* |
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* @package XSpeed |
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*/ |
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|
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namespace XSpeed; |
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|
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defined( 'ABSPATH' ) || exit; |
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|
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class Gzip { |
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|
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const MARKER = 'xSpeed GZIP'; |
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|
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public static function apply( $enabled ) { |
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if ( ! Server::supports_htaccess() ) { |
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return false; |
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} |
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|
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$htaccess = ABSPATH . '.htaccess'; |
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if ( ! file_exists( $htaccess ) ) { |
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return false; |
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} |
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|
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if ( ! function_exists( 'insert_with_markers' ) ) { |
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require_once ABSPATH . 'wp-admin/includes/misc.php'; |
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} |
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|
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$rules = $enabled ? self::apache_rules() : array(); |
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return (bool) insert_with_markers( $htaccess, self::MARKER, $rules ); |
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} |
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|
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public static function apache_rules() { |
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return array( |
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'<IfModule mod_deflate.c>', |
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' AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css text/javascript', |
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' AddOutputFilterByType DEFLATE application/javascript application/x-javascript application/json', |
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' AddOutputFilterByType DEFLATE application/xml application/xhtml+xml application/rss+xml', |
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' AddOutputFilterByType DEFLATE image/svg+xml font/ttf font/otf application/font-woff application/font-woff2', |
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'</IfModule>', |
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); |
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} |
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|
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/** |
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* nginx config snippet for users to paste into their server block. |
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*/ |
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public static function nginx_snippet() { |
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return implode( |
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"\n", |
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array( |
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'gzip on;', |
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'gzip_vary on;', |
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'gzip_min_length 1024;', |
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'gzip_proxied any;', |
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'gzip_comp_level 6;', |
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'gzip_types', |
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' text/plain text/css text/xml text/javascript', |
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' application/javascript application/json application/xml', |
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' application/xml+rss application/xhtml+xml', |
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' image/svg+xml font/ttf font/otf application/font-woff application/font-woff2;', |
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) |
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); |
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} |
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|
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/** |
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* Returns true if the response we just received looks GZIP-encoded. |
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* Result is cached in a transient for 1 hour because the probe makes a |
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* full HTTP request to home_url() — too slow to run on every /status hit. |
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*/ |
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public static function probe_active() { |
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$cached = get_transient( 'xspeed_gzip_active' ); |
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if ( false !== $cached ) { |
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return '1' === $cached; |
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} |
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|
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$res = wp_remote_get( |
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home_url( '/' ), |
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array( |
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'headers' => array( 'Accept-Encoding' => 'gzip' ), |
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'timeout' => 3, |
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) |
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); |
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|
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$active = false; |
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if ( ! is_wp_error( $res ) ) { |
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$enc = wp_remote_retrieve_header( $res, 'content-encoding' ); |
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$active = is_string( $enc ) && false !== stripos( $enc, 'gzip' ); |
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} |
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|
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set_transient( 'xspeed_gzip_active', $active ? '1' : '0', HOUR_IN_SECONDS ); |
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return $active; |
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} |
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} |
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|
