/wp-content/plugins/w3-total-cache/lib/Minify/Minify/CSS/UriRewriter.php
PHP | 381 lines | 171 code | 58 blank | 152 comment | 26 complexity | b44fce62f779cefe532c62f0080b76c4 MD5 | raw file
- <?php
- /**
- * Class Minify_CSS_UriRewriter
- * @package Minify
- */
- /**
- * Rewrite file-relative URIs as root-relative in CSS files
- *
- * @package Minify
- * @author Stephen Clay <steve@mrclay.org>
- */
- class Minify_CSS_UriRewriter {
- /**
- * Defines which class to call as part of callbacks, change this
- * if you extend Minify_CSS_UriRewriter
- * @var string
- */
- protected static $className = 'Minify_CSS_UriRewriter';
- /**
- * rewrite() and rewriteRelative() append debugging information here
- * @var string
- */
- public static $debugText = '';
- /**
- * Does CSS rewrite
- *
- * @static
- * @param string $css
- * @param array $options
- * @return string
- */
- public static function rewrite($css, $options) {
- if (isset($options['prependRelativePath']) || isset($options['currentDir'])) {
- $browsercache_id = (isset($options['browserCacheId']) ? $options['browserCacheId'] : 0);
- $browsercache_extensions = (isset($options['browserCacheExtensions']) ? $options['browserCacheExtensions'] : array());
- if (isset($options['currentDir'])) {
- $document_root = (isset($options['docRoot']) ? $options['docRoot'] : $_SERVER['DOCUMENT_ROOT']);
- $symlinks = (isset($options['symlinks']) ? $options['symlinks'] : array());
- $prependAbsolutePath = (isset($options['prependAbsolutePath']) ? $options['prependAbsolutePath'] : '');
- $prependAbsolutePathCallback = (isset($options['prependAbsolutePathCallback']) ? $options['prependAbsolutePathCallback'] : '');
- $css = self::_rewrite(
- $css,
- $options['currentDir'],
- $prependAbsolutePath,
- $prependAbsolutePathCallback,
- $document_root,
- $symlinks,
- $browsercache_id,
- $browsercache_extensions
- );
- } elseif (isset($options['prependRelativePath'])) {
- $css = self::_prepend(
- $css,
- $options['prependRelativePath'],
- $browsercache_id,
- $browsercache_extensions
- );
- }
- }
- return $css;
- }
- /**
- * Rewrite file relative URIs as root relative in CSS files
- *
- * @param string $css
- *
- * @param string $currentDir The directory of the current CSS file.
- *
- * @param string $prependAbsolutePath
- *
- * @param string $prependAbsolutePathCallback
- *
- * @param string $docRoot The document root of the web site in which
- * the CSS file resides (default = $_SERVER['DOCUMENT_ROOT']).
- *
- * @param array $symlinks (default = array()) If the CSS file is stored in
- * a symlink-ed directory, provide an array of link paths to
- * target paths, where the link paths are within the document root. Because
- * paths need to be normalized for this to work, use "//" to substitute
- * the doc root in the link paths (the array keys). E.g.:
- * <code>
- * array('//symlink' => '/real/target/path') // unix
- * array('//static' => 'D:\\staticStorage') // Windows
- * </code>
- *
- * @param int $browserCacheId
- *
- * @param array $browserCacheExtensions
- *
- * @return string
- */
- private static function _rewrite($css, $currentDir, $prependAbsolutePath = null, $prependAbsolutePathCallback = null, $docRoot = null, $symlinks = array(), $browserCacheId = 0, $browserCacheExtensions = array()) {
- self::$_docRoot = self::_realpath($docRoot ? $docRoot : $_SERVER['DOCUMENT_ROOT']);
- self::$_currentDir = self::_realpath($currentDir);
- self::$_prependAbsolutePath = $prependAbsolutePath;
- self::$_prependAbsolutePathCallback = $prependAbsolutePathCallback;
- self::$_symlinks = array();
- self::$_browserCacheId = $browserCacheId;
- self::$_browserCacheExtensions = $browserCacheExtensions;
- // normalize symlinks
- foreach ($symlinks as $link => $target) {
- $link = ($link === '//') ? self::$_docRoot : str_replace('//', self::$_docRoot . '/', $link);
- $link = strtr($link, '/', DIRECTORY_SEPARATOR);
- self::$_symlinks[$link] = self::_realpath($target);
- }
- self::$debugText .= "docRoot : " . self::$_docRoot . "\n" . "currentDir : " . self::$_currentDir . "\n";
- if (self::$_symlinks) {
- self::$debugText .= "symlinks : " . implode(', ', self::$_symlinks) . "\n";
- }
- self::$debugText .= "\n";
- $css = self::_trimUrls($css);
- // rewrite
- $css = preg_replace_callback('/@import\\s+([\'"])(.*?)[\'"]/', array(self::$className, '_processUriCB'), $css);
- $css = preg_replace_callback('/url\\(\\s*([^\\)\\s]+)\\s*\\)/', array(self::$className, '_processUriCB'), $css);
- return $css;
- }
- /**
- * Prepend a path to relative URIs in CSS files
- *
- * @param string $css
- * @param string $path The path to prepend.
- * @param integer $browserCacheId
- * @param array $browserCacheExtensions
- *
- * @return string
- */
- private static function _prepend($css, $path, $browserCacheId = 0, $browserCacheExtensions = array()) {
- self::$_prependRelativePath = $path;
- self::$_browserCacheId = $browserCacheId;
- self::$_browserCacheExtensions = $browserCacheExtensions;
- $css = self::_trimUrls($css);
- // append
- $css = preg_replace_callback('/@import\\s+([\'"])(.*?)[\'"]/', array(self::$className, '_processUriCB'), $css);
- $css = preg_replace_callback('/url\\(\\s*([^\\)\\s]+)\\s*\\)/', array(self::$className, '_processUriCB'), $css);
- return $css;
- }
- /**
- * @var string directory of this stylesheet
- */
- private static $_currentDir = '';
- /**
- * @var string
- */
- private static $_prependAbsolutePath = null;
- /**
- * @var string
- */
- private static $_prependAbsolutePathCallback = null;
- /**
- * @var string DOC_ROOT
- */
- private static $_docRoot = '';
- /**
- * @var array directory replacements to map symlink targets back to their
- * source (within the document root) E.g. '/var/www/symlink' => '/var/realpath'
- */
- private static $_symlinks = array();
- /**
- * @var int
- */
- private static $_browserCacheId = 0;
- /**
- * @var array
- */
- private static $_browserCacheExtensions = array();
- /**
- * @var string path to prepend
- */
- private static $_prependRelativePath = null;
- private static function _trimUrls($css) {
- return preg_replace('/
- url\\( # url(
- \\s*
- ([^\\)]+?) # 1 = URI (assuming does not contain ")")
- \\s*
- \\) # )
- /x', 'url($1)', $css);
- }
- private static function _processUriCB($m) {
- // $m matched either '/@import\\s+([\'"])(.*?)[\'"]/' or '/url\\(\\s*([^\\)\\s]+)\\s*\\)/'
- $isImport = ($m[0][0] === '@');
- // determine URI and the quote character (if any)
- if ($isImport) {
- $quoteChar = $m[1];
- $uri = $m[2];
- } else {
- // $m[1] is either quoted or not
- $quoteChar = ($m[1][0] === "'" || $m[1][0] === '"') ? $m[1][0] : '';
- $uri = ($quoteChar === '') ? $m[1] : substr($m[1], 1, strlen($m[1]) - 2);
- }
- // analyze URI
- if (false === strpos($uri, '//') && 0 !== strpos($uri, 'data:')) {
- // prepend
- if (self::$_prependRelativePath) {
- if (w3_is_url(self::$_prependRelativePath)) {
- $parse_url = @parse_url(self::$_prependRelativePath);
- if ($parse_url && isset($parse_url['host'])) {
- $scheme = $parse_url['scheme'];
- $host = $parse_url['host'];
- $port = (isset($parse_url['port']) && $parse_url['port'] != 80 ? ':' . (int) $parse_url['port'] : '');
- $path = (!empty($parse_url['path']) ? $parse_url['path'] : '/');
- $dir_css = preg_replace('~[^/]+$~', '', $path);
- $dir_obj = preg_replace('~[^/]+$~', '', $uri);
- $dir = (ltrim((strpos($dir_obj, '/') === 0 ? w3_realpath($dir_obj) : w3_realpath($dir_css . $dir_obj)), '/'));
- $file = basename($uri);
- $uri = sprintf('%s://%s%s/%s/%s', $scheme, $host, $port, $dir, $file);
- }
- } else {
- $uri = self::$_prependRelativePath . $uri;
- }
- } else {
- $uri = self::_rewriteRelative($uri, self::$_currentDir, self::$_docRoot, self::$_symlinks);
- if (self::$_prependAbsolutePath) {
- $prependAbsolutePath = self::$_prependAbsolutePath;
- } elseif (self::$_prependAbsolutePathCallback) {
- $prependAbsolutePath = call_user_func(self::$_prependAbsolutePathCallback, $uri);
- } else {
- $prependAbsolutePath = '';
- }
- if ($prependAbsolutePath) {
- $uri = rtrim($prependAbsolutePath, '/') . $uri;
- }
- }
- if (self::$_browserCacheId && count(self::$_browserCacheExtensions)) {
- $matches = null;
- if (preg_match('~\.([a-z-_]+)(\?.*)?$~', $uri, $matches)) {
- $extension = $matches[1];
- $query = (isset($matches[2]) ? $matches[2] : '');
- if ($extension && in_array($extension, self::$_browserCacheExtensions)) {
- $uri = w3_remove_query($uri);
- $uri .= ($query ? '&' : '?') . self::$_browserCacheId;
- }
- }
- }
- }
- return $isImport ? "@import {$quoteChar}{$uri}{$quoteChar}" : "url({$quoteChar}{$uri}{$quoteChar})";
- }
- /**
- * Rewrite a file relative URI as root relative
- *
- * <code>
- * Minify_CSS_UriRewriter::rewriteRelative(
- * '../img/hello.gif'
- * , '/home/user/www/css' // path of CSS file
- * , '/home/user/www' // doc root
- * );
- * // returns '/img/hello.gif'
- *
- * // example where static files are stored in a symlinked directory
- * Minify_CSS_UriRewriter::rewriteRelative(
- * 'hello.gif'
- * , '/var/staticFiles/theme'
- * , '/home/user/www'
- * , array('/home/user/www/static' => '/var/staticFiles')
- * );
- * // returns '/static/theme/hello.gif'
- * </code>
- *
- * @param string $uri file relative URI
- *
- * @param string $realCurrentDir realpath of the current file's directory.
- *
- * @param string $realDocRoot realpath of the site document root.
- *
- * @param array $symlinks (default = array()) If the file is stored in
- * a symlink-ed directory, provide an array of link paths to
- * real target paths, where the link paths "appear" to be within the document
- * root. E.g.:
- * <code>
- * array('/home/foo/www/not/real/path' => '/real/target/path') // unix
- * array('C:\\htdocs\\not\\real' => 'D:\\real\\target\\path') // Windows
- * </code>
- *
- * @return string
- */
- private static function _rewriteRelative($uri, $realCurrentDir, $realDocRoot, $symlinks = array()) {
- if ('/' === $uri[0]) { // root-relative
- return $uri;
- }
- // prepend path with current dir separator (OS-independent)
- $path = strtr($realCurrentDir, '/', DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR . strtr($uri, '/', DIRECTORY_SEPARATOR);
- self::$debugText .= "file-relative URI : {$uri}\n" . "path prepended : {$path}\n";
- // "unresolve" a symlink back to doc root
- foreach ($symlinks as $link => $target) {
- if (0 === strpos($path, $target)) {
- // replace $target with $link
- $path = $link . substr($path, strlen($target));
- self::$debugText .= "symlink unresolved : {$path}\n";
- break;
- }
- }
- // strip doc root
- $path = substr($path, strlen($realDocRoot));
- self::$debugText .= "docroot stripped : {$path}\n";
- // fix to root-relative URI
- $uri = strtr($path, '/\\', '//');
- // remove /./ and /../ where possible
- $uri = str_replace('/./', '/', $uri);
- // inspired by patch from Oleg Cherniy
- do {
- $uri = preg_replace('@/[^/]+/\\.\\./@', '/', $uri, 1, $changed);
- } while ($changed);
- self::$debugText .= "traversals removed : {$uri}\n\n";
- $uri = preg_replace('~^' . w3_preg_quote(w3_get_base_path()) . '~', w3_get_site_path(), $uri);
- return $uri;
- }
- /**
- * Get realpath with any trailing slash removed. If realpath() fails,
- * just remove the trailing slash.
- *
- * @param string $path
- *
- * @return mixed path with no trailing slash
- */
- protected static function _realpath($path) {
- $realPath = realpath($path);
- if ($realPath !== false) {
- $path = $realPath;
- }
- return rtrim($path, '/\\');
- }
- }