includes/wikiengine/Parse/Default/Image.php
author Dan
Fri, 05 Oct 2007 01:57:00 -0400
changeset 161 e1a22031b5bd
parent 1 fe660c52c48f
permissions -rw-r--r--
Major revamps to the template parser. Fixed a few security holes that could allow PHP to be injected in untimely places in TPL code. Improved Ux for XSS attempt in tplWikiFormat. Documented many functions. Backported much cleaner parser from 2.0 branch. Beautified a lot of code in the depths of the template class. Pretty much a small-scale Extreme Makeover.

<?php

/**
*
* Parses for image placement.
*
* @category Text
*
* @package Text_Wiki
*
* @author Paul M. Jones <pmjones@php.net>
*
* @license LGPL
*
* @version $Id: Image.php,v 1.5 2005/09/12 11:34:44 toggg Exp $
*
*/

/**
*
* Parses for image placement.
*
* @category Text
*
* @package Text_Wiki
*
* @author Paul M. Jones <pmjones@php.net>
*
*/

class Text_Wiki_Parse_Image extends Text_Wiki_Parse {

    /**
     * URL schemes recognized by this rule.
     *
     * @access public
     * @var array
    */
    var $conf = array(
        'schemes' => 'http|https|ftp|gopher|news',
        'host_regexp' => '(?:[^.\s/"\'<\\\#delim#\ca-\cz]+\.)*[a-z](?:[-a-z0-9]*[a-z0-9])?\.?',
        'path_regexp' => '(?:/[^\s"<\\\#delim#\ca-\cz]*)?'
    );

    /**
    *
    * The regular expression used to find source text matching this
    * rule.
    *
    * @access public
    *
    * @var string
    *
    */

    var $regex = '/(\[\[image\s+)(.+?)(\]\])/i';


    /**
     * The regular expressions used to check ecternal urls
     *
     * @access public
     * @var string
     * @see parse()
     */
    var $url = '';

     /**
     * Constructor.
     * We override the constructor to build up the url regex from config
     *
     * @param object &$obj the base conversion handler
     * @return The parser object
     * @access public
     */
    function Text_Wiki_Parse_Image(&$obj)
    {
        $default = $this->conf;
        parent::Text_Wiki_Parse($obj);

        // convert the list of recognized schemes to a regex OR,
        $schemes = $this->getConf('schemes', $default['schemes']);
        $this->url = str_replace( '#delim#', $this->wiki->delim,
           '#(?:' . (is_array($schemes) ? implode('|', $schemes) : $schemes) . ')://'
           . $this->getConf('host_regexp', $default['host_regexp'])
           . $this->getConf('path_regexp', $default['path_regexp']) .'#');
    }

    /**
    *
    * Generates a token entry for the matched text.  Token options are:
    *
    * 'src' => The image source, typically a relative path name.
    *
    * 'opts' => Any macro options following the source.
    *
    * @access public
    *
    * @param array &$matches The array of matches from parse().
    *
    * @return A delimited token number to be used as a placeholder in
    * the source text.
    *
    */

    function process(&$matches)
    {
        $pos = strpos($matches[2], ' ');

        if ($pos === false) {
            $options = array(
                'src' => $matches[2],
                'attr' => array());
        } else {
            // everything after the space is attribute arguments
            $options = array(
                'src' => substr($matches[2], 0, $pos),
                'attr' => $this->getAttrs(substr($matches[2], $pos+1))
            );
            // check the scheme case of external link
            if (array_key_exists('link', $options['attr'])) {
                // external url ?
                if (($pos = strpos($options['attr']['link'], '://')) !== false) {
                    if (!preg_match($this->url, $options['attr']['link'])) {
                        return $matches[0];
                    }
                } elseif (in_array('Wikilink', $this->wiki->disable)) {
                        return $matches[0]; // Wikilink disabled
                }
            }
        }

        return $this->wiki->addToken($this->rule, $options);
    }
}
?>