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<?php |
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/** |
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* Ported from https://github.com/Automattic/nginx-http-concat |
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* |
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* Concatenation script inspired by Nginx's ngx_http_concat and Apache's modconcat modules. |
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* |
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* It follows the same pattern for enabling the concatenation. It uses two ?, like this: |
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* http://example.com/??style1.css,style2.css,foo/style3.css |
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* |
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* If a third ? is present it's treated as version string. Like this: |
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* http://example.com/??style1.css,style2.css,foo/style3.css?v=102234 |
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* |
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* It will also replace the relative paths in CSS files with absolute paths. |
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* |
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* @package PoweredCache |
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*/ |
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|
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namespace PoweredCache\FileOptimizer; |
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|
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// phpcs:disable |
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|
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use PoweredCache\Dependencies\MatthiasMullie\Minify\CSS; |
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use PoweredCache\Dependencies\MatthiasMullie\Minify\JS; |
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|
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/** |
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* PSR-4-ish autoloading |
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* |
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* @since 2.0 |
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*/ |
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spl_autoload_register( |
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function ( $class ) { |
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// project-specific namespace prefix. |
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$prefix = 'PoweredCache\\'; |
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|
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// base directory for the namespace prefix. |
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$base_dir = __DIR__ . '/classes/'; |
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|
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// does the class use the namespace prefix? |
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$len = strlen( $prefix ); |
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|
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if ( strncmp( $prefix, $class, $len ) !== 0 ) { |
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return; |
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} |
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|
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$relative_class = substr( $class, $len ); |
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|
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$file = $base_dir . str_replace( '\\', '/', $relative_class ) . '.php'; |
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|
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// if the file exists, require it. |
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if ( file_exists( $file ) ) { |
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require $file; |
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} |
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} |
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); |
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|
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/* Config */ |
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$concat_max_files = 150; |
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$concat_unique = true; |
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$concat_types = array( |
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'css' => 'text/css', |
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'js' => 'application/javascript', |
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); |
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|
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/* |
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Constants */ |
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// By default determine the document root from this scripts path in the plugins dir (you can hardcode this define) |
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define( 'CONCAT_FILES_ROOT', substr( dirname( __DIR__ ), 0, strpos( dirname( __DIR__ ), '/wp-content' ) ) ); |
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define( 'POWERED_CACHE_FO_CACHE_DIR', CONCAT_FILES_ROOT . '/wp-content/cache/min/' ); |
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|
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if ( ! file_exists( POWERED_CACHE_FO_CACHE_DIR ) ) { |
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mkdir( POWERED_CACHE_FO_CACHE_DIR, 0775, true ); |
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} |
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|
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function concat_http_status_exit( $status ) { |
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switch ( $status ) { |
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case 200: |
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$text = 'OK'; |
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break; |
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case 400: |
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$text = 'Bad Request'; |
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break; |
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case 403: |
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$text = 'Forbidden'; |
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break; |
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case 404: |
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$text = 'Not found'; |
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break; |
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case 500: |
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$text = 'Internal Server Error'; |
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break; |
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default: |
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$text = ''; |
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} |
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|
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$protocol = $_SERVER['SERVER_PROTOCOL']; |
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if ( 'HTTP/1.1' != $protocol && 'HTTP/1.0' != $protocol ) { |
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$protocol = 'HTTP/1.0'; |
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} |
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|
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@header( "$protocol $status $text", true, $status ); |
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exit(); |
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} |
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|
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function concat_get_mtype( $file ) { |
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global $concat_types; |
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|
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$lastdot_pos = strrpos( $file, '.' ); |
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if ( false === $lastdot_pos ) { |
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return false; |
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} |
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|
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$ext = substr( $file, $lastdot_pos + 1 ); |
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|
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return isset( $concat_types[ $ext ] ) ? $concat_types[ $ext ] : false; |
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} |
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|
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function concat_get_path( $uri ) { |
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if ( ! strlen( $uri ) ) { |
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concat_http_status_exit( 400 ); |
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} |
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|
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if ( false !== strpos( $uri, '..' ) || false !== strpos( $uri, "\0" ) ) { |
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concat_http_status_exit( 400 ); |
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} |
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|
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return CONCAT_FILES_ROOT . ( '/' != $uri[0] ? '/' : '' ) . $uri; |
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} |
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|
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function relative_path_replace( $buf, $dirpath ) { |
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// url(relative/path/to/file) -> url(/absolute/and/not/relative/path/to/file) |
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$buf = preg_replace( |
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'/(:?\s*url\s*\()\s*(?:\'|")?\s*([^\/\'"\s\)](?:(?<!data:|http:|https:|[\(\'"]#|%23).)*)[\'"\s]*\)/isU', |
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'$1' . ( '/' === $dirpath ? '/' : $dirpath . '/' ) . '$2)', |
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$buf |
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); |
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|
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return $buf; |
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} |
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|
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/* Main() */ |
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if ( ! in_array( $_SERVER['REQUEST_METHOD'], array( 'GET', 'HEAD' ) ) ) { |
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concat_http_status_exit( 400 ); |
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} |
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|
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// /_static/??/foo/bar.css,/foo1/bar/baz.css?m=293847g |
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// or |
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// /_static/??-eJzTT8vP109KLNJLLi7W0QdyDEE8IK4CiVjn2hpZGluYmKcDABRMDPM= |
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$args = parse_url( $_SERVER['REQUEST_URI'], PHP_URL_QUERY ); |
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if ( ! $args || false === strpos( $args, '?' ) ) { |
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concat_http_status_exit( 400 ); |
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} |
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|
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$args = substr( $args, strpos( $args, '?' ) + 1 ); |
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|
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// /foo/bar.css,/foo1/bar/baz.css?m=293847g |
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// or |
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// -eJzTT8vP109KLNJLLi7W0QdyDEE8IK4CiVjn2hpZGluYmKcDABRMDPM= |
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if ( '-' == $args[0] ) { |
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$args = @gzuncompress( base64_decode( substr( $args, 1 ) ) ); |
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|
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// Invalid data, abort! |
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if ( false === $args ) { |
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concat_http_status_exit( 400 ); |
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} |
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} |
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|
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// /foo/bar.css,/foo1/bar/baz.css?m=293847g |
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$version_string_pos = strpos( $args, '?' ); |
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if ( false !== $version_string_pos ) { |
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$args = substr( $args, 0, $version_string_pos ); |
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} |
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|
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// /foo/bar.css,/foo1/bar/baz.css |
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$args = explode( ',', $args ); |
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if ( ! $args ) { |
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concat_http_status_exit( 400 ); |
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} |
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|
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// array( '/foo/bar.css', '/foo1/bar/baz.css' ) |
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if ( 0 == count( $args ) || count( $args ) > $concat_max_files ) { |
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concat_http_status_exit( 400 ); |
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} |
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|
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// If we're in a subdirectory context, use that as the root. |
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// We can't assume that the root serves the same content as the subdir. |
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$subdir_path_prefix = ''; |
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$request_path = parse_url( $_SERVER['REQUEST_URI'], PHP_URL_PATH ); |
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$_static_index = strpos( $request_path, '/_static/' ); |
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if ( $_static_index > 0 ) { |
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$subdir_path_prefix = substr( $request_path, 0, $_static_index ); |
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} |
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unset( $request_path, $_static_index ); |
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|
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$last_modified = 0; |
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$pre_output = ''; |
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$output = ''; |
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|
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$do_minify = (bool) stripos( $_SERVER['REQUEST_URI'], 'minify=1' ); |
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$hash = sha1( $_SERVER['REQUEST_URI'] ); |
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$latest_file = end( $args ); |
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|
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$cache_file_name = POWERED_CACHE_FO_CACHE_DIR . $hash; |
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if ( 'application/javascript' == concat_get_mtype( $latest_file ) ) { |
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$cache_file_name .= '.js'; |
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} elseif ( 'text/css' == concat_get_mtype( $latest_file ) ) { |
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$cache_file_name .= '.css'; |
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} |
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|
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if ( file_exists( $cache_file_name ) ) { |
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$buf = @file_get_contents( $cache_file_name ); |
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if ( $buf ) { |
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$stat = stat( $cache_file_name ); |
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|
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header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s', $stat['mtime'] ) . ' GMT' ); |
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header( 'Content-Length: ' . ( strlen( $pre_output ) + strlen( $buf ) ) ); |
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header( 'Content-Type: ' . concat_get_mtype( $latest_file ) ); |
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|
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echo $pre_output . $buf; |
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exit; |
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} |
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} |
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|
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foreach ( $args as $uri ) { |
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|
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$fullpath = concat_get_path( $uri ); |
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|
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if ( ! file_exists( $fullpath ) ) { |
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concat_http_status_exit( 404 ); |
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} |
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|
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$mime_type = concat_get_mtype( $fullpath ); |
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if ( ! in_array( $mime_type, $concat_types ) ) { |
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concat_http_status_exit( 400 ); |
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} |
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|
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if ( $concat_unique ) { |
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if ( ! isset( $last_mime_type ) ) { |
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$last_mime_type = $mime_type; |
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} |
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|
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if ( $last_mime_type != $mime_type ) { |
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concat_http_status_exit( 400 ); |
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} |
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} |
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|
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$stat = stat( $fullpath ); |
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if ( false === $stat ) { |
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concat_http_status_exit( 500 ); |
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} |
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|
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if ( $stat['mtime'] > $last_modified ) { |
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$last_modified = $stat['mtime']; |
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} |
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|
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$buf = file_get_contents( $fullpath ); |
| 256 |
if ( false === $buf ) { |
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concat_http_status_exit( 500 ); |
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} |
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|
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if ( 'text/css' == $mime_type ) { |
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$dirpath = $subdir_path_prefix . dirname( $uri ); |
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|
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// url(relative/path/to/file) -> url(/absolute/and/not/relative/path/to/file) |
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$buf = relative_path_replace( $buf, $dirpath ); |
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|
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// AlphaImageLoader(...src='relative/path/to/file'...) -> AlphaImageLoader(...src='/absolute/path/to/file'...) |
| 267 |
$buf = preg_replace( |
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'/(Microsoft.AlphaImageLoader\s*\([^\)]*src=(?:\'|")?)([^\/\'"\s\)](?:(?<!http:|https:).)*)\)/isU', |
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'$1' . ( $dirpath == '/' ? '/' : $dirpath . '/' ) . '$2)', |
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$buf |
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); |
| 272 |
|
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// The @charset rules must be on top of the output |
| 274 |
if ( 0 === strpos( $buf, '@charset' ) ) { |
| 275 |
preg_replace_callback( |
| 276 |
'/(?P<charset_rule>@charset\s+[\'"][^\'"]+[\'"];)/i', |
| 277 |
function ( $match ) { |
| 278 |
global $pre_output; |
| 279 |
|
| 280 |
if ( 0 === strpos( $pre_output, '@charset' ) ) { |
| 281 |
return ''; |
| 282 |
} |
| 283 |
|
| 284 |
$pre_output = $match[0] . "\n" . $pre_output; |
| 285 |
|
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return ''; |
| 287 |
}, |
| 288 |
$buf |
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); |
| 290 |
} |
| 291 |
|
| 292 |
// Move the @import rules on top of the concatenated output. |
| 293 |
// Only @charset rule are allowed before them. |
| 294 |
if ( false !== strpos( $buf, '@import' ) ) { |
| 295 |
$buf = preg_replace_callback( |
| 296 |
'/(?P<pre_path>@import\s+(?:url\s*\()?[\'"\s]*)(?P<path>[^\'"\s](?:https?:\/\/.+\/?)?.+?)(?P<post_path>[\'"\s\)]*;)/i', |
| 297 |
function ( $match ) use ( $dirpath ) { |
| 298 |
global $pre_output; |
| 299 |
|
| 300 |
if ( 0 !== strpos( $match['path'], 'http' ) && '/' != $match['path'][0] ) { |
| 301 |
$pre_output .= $match['pre_path'] . ( $dirpath == '/' ? '/' : $dirpath . '/' ) . |
| 302 |
$match['path'] . $match['post_path'] . "\n"; |
| 303 |
} else { |
| 304 |
$pre_output .= $match[0] . "\n"; |
| 305 |
} |
| 306 |
|
| 307 |
return ''; |
| 308 |
}, |
| 309 |
$buf |
| 310 |
); |
| 311 |
} |
| 312 |
} |
| 313 |
|
| 314 |
if ( 'application/javascript' == $mime_type ) { |
| 315 |
$output .= "$buf;\n"; |
| 316 |
} else { |
| 317 |
$output .= "$buf"; |
| 318 |
} |
| 319 |
} |
| 320 |
|
| 321 |
if ( $do_minify && false === stripos( $uri, '.min' ) ) { |
| 322 |
if ( 'application/javascript' == $mime_type ) { |
| 323 |
$js_minify = new JS( $output ); |
| 324 |
$output = $js_minify->minify(); |
| 325 |
} elseif ( 'text/css' == $mime_type ) { |
| 326 |
$css_minify = new CSS( $output ); |
| 327 |
$output = $css_minify->minify(); |
| 328 |
} |
| 329 |
} |
| 330 |
|
| 331 |
header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s', $last_modified ) . ' GMT' ); |
| 332 |
header( 'Content-Length: ' . ( strlen( $pre_output ) + strlen( $output ) ) ); |
| 333 |
header( "Content-Type: $mime_type" ); |
| 334 |
|
| 335 |
echo $pre_output . $output; |
| 336 |
|
| 337 |
$cache_file_name = POWERED_CACHE_FO_CACHE_DIR . $hash; |
| 338 |
if ( 'application/javascript' == $mime_type ) { |
| 339 |
$cache_file_name .= '.js'; |
| 340 |
} elseif ( 'text/css' == $mime_type ) { |
| 341 |
$cache_file_name .= '.css'; |
| 342 |
} |
| 343 |
|
| 344 |
file_put_contents( $cache_file_name, $pre_output . $output ); |
| 345 |
|
