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| 1 | <?php |
| 2 | |
| 3 | namespace Automattic\Jetpack_Boost\Lib\Minify; |
| 4 | |
| 5 | /** |
| 6 | * This is a class to map script and style URLs to local filesystem paths. |
| 7 | * This is necessary when we are deciding what we can concatenate and when |
| 8 | * actually building the concatenation. |
| 9 | */ |
| 10 | class Dependency_Path_Mapping { |
| 11 | /** |
| 12 | * Save entire site URL so we can check whether other URLs are based on it (internal URLs) |
| 13 | * |
| 14 | * @var string |
| 15 | */ |
| 16 | public $site_url; |
| 17 | |
| 18 | /** |
| 19 | * Save URI path and dir for mapping URIs to filesystem paths |
| 20 | * |
| 21 | * @var string |
| 22 | */ |
| 23 | public $site_uri_path = null; |
| 24 | public $site_dir = null; |
| 25 | public $content_uri_path = null; |
| 26 | public $content_dir = null; |
| 27 | public $plugin_uri_path = null; |
| 28 | public $plugin_dir = null; |
| 29 | |
| 30 | public function __construct( |
| 31 | // Expose URLs and DIRs for unit test |
| 32 | $site_url = null, // default site URL is determined dynamically |
| 33 | $site_dir = null, |
| 34 | $content_url = WP_CONTENT_URL, |
| 35 | $content_dir = WP_CONTENT_DIR, |
| 36 | $plugin_url = WP_PLUGIN_URL, |
| 37 | $plugin_dir = WP_PLUGIN_DIR |
| 38 | ) { |
| 39 | if ( null === $site_dir ) { |
| 40 | $site_dir = Config::get_abspath(); |
| 41 | } |
| 42 | |
| 43 | if ( null === $site_url ) { |
| 44 | $site_url = is_multisite() ? get_site_url( get_current_blog_id() ) : get_site_url(); |
| 45 | } |
| 46 | $site_url = trailingslashit( $site_url ); |
| 47 | $this->site_url = $site_url; |
| 48 | $this->site_uri_path = wp_parse_url( $site_url, PHP_URL_PATH ); |
| 49 | $this->site_dir = trailingslashit( $site_dir ); |
| 50 | |
| 51 | // Only resolve content URLs if they are under the site URL |
| 52 | if ( $this->is_internal_uri( $content_url ) ) { |
| 53 | $this->content_uri_path = wp_parse_url( trailingslashit( $content_url ), PHP_URL_PATH ); |
| 54 | $this->content_dir = trailingslashit( $content_dir ); |
| 55 | } |
| 56 | |
| 57 | // Only resolve plugin URLs if they are under the site URL |
| 58 | if ( $this->is_internal_uri( $plugin_url ) ) { |
| 59 | $this->plugin_uri_path = wp_parse_url( trailingslashit( $plugin_url ), PHP_URL_PATH ); |
| 60 | $this->plugin_dir = trailingslashit( $plugin_dir ); |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * Given the full URL of a script/style dependency, return its local filesystem path. |
| 66 | */ |
| 67 | public function dependency_src_to_fs_path( $src ) { |
| 68 | if ( ! $this->is_internal_uri( $src ) ) { |
| 69 | // If a URI is not internal, we can have no confidence |
| 70 | // we are resolving to the correct file. |
| 71 | return false; |
| 72 | } |
| 73 | |
| 74 | $src_parts = wp_parse_url( $src ); |
| 75 | if ( false === $src_parts ) { |
| 76 | return false; |
| 77 | } |
| 78 | |
| 79 | if ( empty( $src_parts['path'] ) ) { |
| 80 | // We can't find anything to resolve |
| 81 | return false; |
| 82 | } |
| 83 | $path = $src_parts['path']; |
| 84 | |
| 85 | if ( empty( $src_parts['host'] ) ) { |
| 86 | // With no host, this is a path relative to the WordPress root |
| 87 | $fs_path = "{$this->site_dir}{$path}"; |
| 88 | |
| 89 | return file_exists( $fs_path ) ? $fs_path : false; |
| 90 | } |
| 91 | |
| 92 | return $this->uri_path_to_fs_path( $path ); |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * Given a URI path of a script/style resource, return its local filesystem path. |
| 97 | */ |
| 98 | public function uri_path_to_fs_path( $uri_path ) { |
| 99 | if ( 1 === preg_match( '#(?:^|/)\.\.?(?:/|$)#', $uri_path ) ) { |
| 100 | // Reject relative paths |
| 101 | return false; |
| 102 | } |
| 103 | |
| 104 | // The plugin URI path may be contained within the content URI path, so we check it before the content URI. |
| 105 | // And both the plugin and content URI paths must be contained within the site URI path, |
| 106 | // so we check them before checking the site URI. |
| 107 | if ( isset( $this->plugin_uri_path ) && static::is_descendant_uri( $this->plugin_uri_path, $uri_path ) ) { |
| 108 | $file_path = $this->plugin_dir . substr( $uri_path, strlen( $this->plugin_uri_path ) ); |
| 109 | } elseif ( isset( $this->content_uri_path ) && static::is_descendant_uri( $this->content_uri_path, $uri_path ) ) { |
| 110 | $file_path = $this->content_dir . substr( $uri_path, strlen( $this->content_uri_path ) ); |
| 111 | } elseif ( static::is_descendant_uri( $this->site_uri_path, $uri_path ) ) { |
| 112 | $file_path = $this->site_dir . substr( $uri_path, strlen( $this->site_uri_path ) ); |
| 113 | } |
| 114 | |
| 115 | if ( isset( $file_path ) && file_exists( $file_path ) ) { |
| 116 | return $file_path; |
| 117 | } else { |
| 118 | return false; |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * Determine whether a URI is internal, contained by this site. |
| 124 | * |
| 125 | * This method helps ensure we only resolve to local FS paths. |
| 126 | */ |
| 127 | public function is_internal_uri( $uri ) { |
| 128 | if ( jetpack_boost_page_optimize_starts_with( '/', $uri ) && ! jetpack_boost_page_optimize_starts_with( '//', $uri ) ) { |
| 129 | // Absolute paths are internal because they are based on the site dir (typically ABSPATH), |
| 130 | // and this looks like an absolute path. |
| 131 | return true; |
| 132 | } |
| 133 | |
| 134 | // To be internal, a URL must have the same scheme, host, and port as the site URL |
| 135 | // and start with the same path as the site URL. |
| 136 | return static::is_descendant_uri( $this->site_url, $uri ); |
| 137 | } |
| 138 | |
| 139 | /** |
| 140 | * Check whether a path is descended from the given directory path. |
| 141 | * |
| 142 | * Does not handle relative paths. |
| 143 | */ |
| 144 | public static function is_descendant_uri( $dir_path, $candidate ) { |
| 145 | // Ensure a trailing slash to avoid false matches like |
| 146 | // "/wp-content/resource" being judged a descendant of "/wp". |
| 147 | $dir_path = trailingslashit( $dir_path ); |
| 148 | |
| 149 | return jetpack_boost_page_optimize_starts_with( $dir_path, $candidate ); |
| 150 | } |
| 151 | } |