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Edit File : urirewriter.cls.php \| Size : 10.10 KB
<?php /** * Rewrite file-relative URIs as root-relative in CSS files * * @package Minify * @author Stephen Clay <steve@mrclay.org> / namespace LiteSpeed\Lib; defined( 'WPINC' ) \|\| exit ; class UriRewriter { /* * rewrite() and rewriteRelative() append debugging information here * * @var string / public static $debugText = ''; /* * In CSS content, rewrite file relative URIs as root relative * * @param string $css * * @param string $currentDir The directory of the current CSS file. * * @param string $docRoot The document root of the web site in which * the CSS file resides (default = $_SERVER['DOCUMENT_ROOT']). * * @param array $symlinks (default = array()) If the CSS file is stored in * a symlink-ed directory, provide an array of link paths to * target paths, where the link paths are within the document root. Because * paths need to be normalized for this to work, use "//" to substitute * the doc root in the link paths (the array keys). E.g.: * <code> * array('//symlink' => '/real/target/path') // unix * array('//static' => 'D:\\staticStorage') // Windows * </code> * * @return string / public static function rewrite($css, $currentDir, $docRoot = null, $symlinks = array()) { self::$_docRoot = self::_realpath( $docRoot ? $docRoot : $_SERVER['DOCUMENT_ROOT'] ); self::$_currentDir = self::_realpath($currentDir); self::$_symlinks = array(); // normalize symlinks in order to map to link 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 : " . var_export(self::$_symlinks, 1) . "\n"; } self::$debugText .= "\n"; $css = self::_trimUrls($css); $css = self::_owlifySvgPaths($css); // rewrite $pattern = '/@import\\s+([\'"])(.?)[\'"]/'; $css = preg_replace_callback($pattern, __CLASS__ . '::_processUriCB', $css); $pattern = '/url\\(\\s([\'"](.?)[\'"]\|[^\\)\\s]+)\\s\\)/'; $css = preg_replace_callback($pattern, __CLASS__ . '::_processUriCB', $css); $css = self::_unOwlify($css); return $css; } /* * In CSS content, prepend a path to relative URIs * * @param string $css * * @param string $path The path to prepend. * * @return string / public static function prepend($css, $path) { self::$_prependPath = $path; $css = self::_trimUrls($css); $css = self::_owlifySvgPaths($css); // append $pattern = '/@import\\s+([\'"])(.?)[\'"]/'; $css = preg_replace_callback($pattern, __CLASS__ . '::_processUriCB', $css); $pattern = '/url\\(\\s([\'"](.?)[\'"]\|[^\\)\\s]+)\\s\\)/'; $css = preg_replace_callback($pattern, __CLASS__ . '::_processUriCB', $css); $css = self::_unOwlify($css); self::$_prependPath = null; return $css; } /* * Get a root relative URI from a file relative URI * * <code> * 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 * 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 $symlinks (default = array()) If the file is stored in * a symlink-ed directory, provide an array of link paths to * real target paths, where the link paths "appear" to be within the document * root. E.g.: * <code> * array('/home/foo/www/not/real/path' => '/real/target/path') // unix * array('C:\\htdocs\\not\\real' => 'D:\\real\\target\\path') // Windows * </code> * * @return string / public static function rewriteRelative($uri, $realCurrentDir, $realDocRoot, $symlinks = array()) { // prepend path with current dir separator (OS-independent) $path = strtr($realCurrentDir, '/', DIRECTORY_SEPARATOR); $path .= DIRECTORY_SEPARATOR . strtr($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, '/\\', '//'); $uri = self::removeDots($uri); self::$debugText .= "traversals removed : {$uri}\n\n"; return $uri; } /* * Remove instances of "./" and "../" where possible from a root-relative URI * * @param string $uri * * @return string / public static function removeDots($uri) { $uri = str_replace('/./', '/', $uri); // inspired by patch from Oleg Cherniy do { $uri = preg_replace('@/[^/]+/\\.\\./@', '/', $uri, 1, $changed); } while ($changed); 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, '/\\'); } /* * Directory of this stylesheet * * @var string / private static $_currentDir = ''; /* * DOC_ROOT * * @var string / private static $_docRoot = ''; /* * directory replacements to map symlink targets back to their * source (within the document root) E.g. '/var/www/symlink' => '/var/realpath' * * @var array / private static $_symlinks = array(); /* * Path to prepend * * @var string / private static $_prependPath = null; /* * @param string $css * * @return string / private static function _trimUrls($css) { $pattern = '/ url\\( # url( \\s ([^\\)]+?) # 1 = URI (assuming does not contain ")") \\s* \\) # ) /x'; return preg_replace($pattern, 'url($1)', $css); } /** * @param array $m * * @return string / private static function _processUriCB($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($m[1]) - 2); } if ($uri === '') { return $m[0]; } // if not anchor id, not root/scheme relative, and not starts with scheme if (!preg_match('~^(#\|/\|[a-z]+\:)~', $uri)) { // URI is file-relative: rewrite depending on options if (self::$_prependPath === null) { $uri = self::rewriteRelative($uri, self::$_currentDir, self::$_docRoot, self::$_symlinks); } else { $uri = self::$_prependPath . $uri; if ($uri[0] === '/') { $root = ''; $rootRelative = $uri; $uri = $root . self::removeDots($rootRelative); } elseif (preg_match('@^((https?\:)?//([^/]+))/@', $uri, $m) && (false !== strpos($m[3], '.'))) { $root = $m[1]; $rootRelative = substr($uri, strlen($root)); $uri = $root . self::removeDots($rootRelative); } } } if ($isImport) { return "@import {$quoteChar}{$uri}{$quoteChar}"; } else { return "url({$quoteChar}{$uri}{$quoteChar})"; } } /** * Mungs some inline SVG URL declarations so they won't be touched * * @link https://github.com/mrclay/minify/issues/517 * @see _unOwlify * * @param string $css * @return string / private static function _owlifySvgPaths($css) { $pattern = '~\b((?:clip-path\|mask\|-webkit-mask)\s\:\s)url(\(\s#\w+\s\))~'; return preg_replace($pattern, '$1owl$2', $css); } /* * Undo work of _owlify * * @see _owlifySvgPaths * * @param string $css * @return string / private static function _unOwlify($css) { $pattern = '~\b((?:clip-path\|mask\|-webkit-mask)\s\:\s*)owl~'; return preg_replace($pattern, '$1url', $css); } } Back

Edit File : urirewriter.cls.php | Size : 10.10 KB

<?php
/**
 * Rewrite file-relative URIs as root-relative in CSS files
 *
 * @package Minify
 * @author Stephen Clay <steve@mrclay.org>
 */

namespace LiteSpeed\Lib;

defined( 'WPINC' ) || exit ;

class UriRewriter
{

/**
     * rewrite() and rewriteRelative() append debugging information here
     *
     * @var string
     */
    public static $debugText = '';

/**
     * In CSS content, rewrite file relative URIs as root relative
     *
     * @param string $css
     *
     * @param string $currentDir The directory of the current CSS file.
     *
     * @param string $docRoot The document root of the web site in which
     * the CSS file resides (default = $_SERVER['DOCUMENT_ROOT']).
     *
     * @param array $symlinks (default = array()) If the CSS file is stored in
     * a symlink-ed directory, provide an array of link paths to
     * target paths, where the link paths are within the document root. Because
     * paths need to be normalized for this to work, use "//" to substitute
     * the doc root in the link paths (the array keys). E.g.:
     * <code>
     * array('//symlink' => '/real/target/path') // unix
     * array('//static' => 'D:\\staticStorage')  // Windows
     * </code>
     *
     * @return string
     */
    public static function rewrite($css, $currentDir, $docRoot = null, $symlinks = array())
    {
        self::$_docRoot = self::_realpath(
            $docRoot ? $docRoot : $_SERVER['DOCUMENT_ROOT']
        );
        self::$_currentDir = self::_realpath($currentDir);
        self::$_symlinks = array();

// normalize symlinks in order to map to link
        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::$debugText .= "symlinks : " . var_export(self::$_symlinks, 1) . "\n";
        }
        self::$debugText .= "\n";

$css = self::_trimUrls($css);

$css = self::_owlifySvgPaths($css);

// rewrite
        $pattern = '/@import\\s+([\'"])(.*?)[\'"]/';
        $css = preg_replace_callback($pattern, __CLASS__ . '::_processUriCB', $css);

$pattern = '/url\$\\s*([\'"](.*?)[\'"]|[^\$\\s]+)\\s*\\)/';
        $css = preg_replace_callback($pattern, __CLASS__ . '::_processUriCB', $css);

$css = self::_unOwlify($css);

return $css;
    }

/**
     * In CSS content, prepend a path to relative URIs
     *
     * @param string $css
     *
     * @param string $path The path to prepend.
     *
     * @return string
     */
    public static function prepend($css, $path)
    {
        self::$_prependPath = $path;

$css = self::_trimUrls($css);

$css = self::_owlifySvgPaths($css);

// append
        $pattern = '/@import\\s+([\'"])(.*?)[\'"]/';
        $css = preg_replace_callback($pattern, __CLASS__ . '::_processUriCB', $css);

$pattern = '/url\$\\s*([\'"](.*?)[\'"]|[^\$\\s]+)\\s*\\)/';
        $css = preg_replace_callback($pattern, __CLASS__ . '::_processUriCB', $css);

$css = self::_unOwlify($css);

self::$_prependPath = null;

return $css;
    }

/**
     * Get a root relative URI from a file relative URI
     *
     * <code>
     * 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
     * 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 $symlinks (default = array()) If the file is stored in
     * a symlink-ed directory, provide an array of link paths to
     * real target paths, where the link paths "appear" to be within the document
     * root. E.g.:
     * <code>
     * array('/home/foo/www/not/real/path' => '/real/target/path') // unix
     * array('C:\\htdocs\\not\\real' => 'D:\\real\\target\\path')  // Windows
     * </code>
     *
     * @return string
     */
    public static function rewriteRelative($uri, $realCurrentDir, $realDocRoot, $symlinks = array())
    {
        // prepend path with current dir separator (OS-independent)
        $path = strtr($realCurrentDir, '/', DIRECTORY_SEPARATOR);
        $path .= DIRECTORY_SEPARATOR . strtr($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, '/\\', '//');
        $uri = self::removeDots($uri);

self::$debugText .= "traversals removed : {$uri}\n\n";

return $uri;
    }

/**
     * Remove instances of "./" and "../" where possible from a root-relative URI
     *
     * @param string $uri
     *
     * @return string
     */
    public static function removeDots($uri)
    {
        $uri = str_replace('/./', '/', $uri);
        // inspired by patch from Oleg Cherniy
        do {
            $uri = preg_replace('@/[^/]+/\\.\\./@', '/', $uri, 1, $changed);
        } while ($changed);

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, '/\\');
    }

/**
     * Directory of this stylesheet
     *
     * @var string
     */
    private static $_currentDir = '';

/**
     * DOC_ROOT
     *
     * @var string
     */
    private static $_docRoot = '';

/**
     * directory replacements to map symlink targets back to their
     * source (within the document root) E.g. '/var/www/symlink' => '/var/realpath'
     *
     * @var array
     */
    private static $_symlinks = array();

/**
     * Path to prepend
     *
     * @var string
     */
    private static $_prependPath = null;

/**
     * @param string $css
     *
     * @return string
     */
    private static function _trimUrls($css)
    {
        $pattern = '/
            url\$      # url(
            \\s*
            ([^\$]+?)  # 1 = URI (assuming does not contain ")")
            \\s*
            \\)         # )
        /x';

return preg_replace($pattern, 'url($1)', $css);
    }

/**
     * @param array $m
     *
     * @return string
     */
    private static function _processUriCB($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);
        }

if ($uri === '') {
            return $m[0];
        }

// if not anchor id, not root/scheme relative, and not starts with scheme
        if (!preg_match('~^(#|/|[a-z]+\:)~', $uri)) {
            // URI is file-relative: rewrite depending on options
            if (self::$_prependPath === null) {
                $uri = self::rewriteRelative($uri, self::$_currentDir, self::$_docRoot, self::$_symlinks);
            } else {
                $uri = self::$_prependPath . $uri;
                if ($uri[0] === '/') {
                    $root = '';
                    $rootRelative = $uri;
                    $uri = $root . self::removeDots($rootRelative);
                } elseif (preg_match('@^((https?\:)?//([^/]+))/@', $uri, $m) && (false !== strpos($m[3], '.'))) {
                    $root = $m[1];
                    $rootRelative = substr($uri, strlen($root));
                    $uri = $root . self::removeDots($rootRelative);
                }
            }
        }

if ($isImport) {
            return "@import {$quoteChar}{$uri}{$quoteChar}";
        } else {
            return "url({$quoteChar}{$uri}{$quoteChar})";
        }
    }

/**
     * Mungs some inline SVG URL declarations so they won't be touched
     *
     * @link https://github.com/mrclay/minify/issues/517
     * @see _unOwlify
     *
     * @param string $css
     * @return string
     */
    private static function _owlifySvgPaths($css)
    {
        $pattern = '~\b((?:clip-path|mask|-webkit-mask)\s*\:\s*)url($\s*#\w+\s*$)~';

return preg_replace($pattern, '$1owl$2', $css);
    }

/**
     * Undo work of _owlify
     *
     * @see _owlifySvgPaths
     *
     * @param string $css
     * @return string
     */
    private static function _unOwlify($css)
    {
        $pattern = '~\b((?:clip-path|mask|-webkit-mask)\s*\:\s*)owl~';

return preg_replace($pattern, '$1url', $css);
    }
}

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