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PATH: home / letacommog / letaweb / admin / classes / htmlpurifier / library / HTMLPurifier / URIFilter

<?php

class HTMLPurifier_URIFilter_Munge extends HTMLPurifier_URIFilter
{
    public $name = 'Munge';
    public $post = true;
    private $target, $parser, $doEmbed, $secretKey;

protected $replace = array();

public function prepare($config)
    {
        $this->target = $config->get('URI.'.$this->name);
        $this->parser = new HTMLPurifier_URIParser();
        $this->doEmbed = $config->get('URI.MungeResources');
        $this->secretKey = $config->get('URI.MungeSecretKey');

return true;
    }
    public function filter(&$uri, $config, $context)
    {
        if ($context->get('EmbeddedURI', true) && !$this->doEmbed) {
            return true;
        }

$scheme_obj = $uri->getSchemeObj($config, $context);
        if (!$scheme_obj) {
            return true;
        } // ignore unknown schemes, maybe another postfilter did it
        if (!$scheme_obj->browsable) {
            return true;
        } // ignore non-browseable schemes, since we can't munge those in a reasonable way
        if ($uri->isBenign($config, $context)) {
            return true;
        } // don't redirect if a benign URL

$this->makeReplace($uri, $config, $context);
        $this->replace = array_map('rawurlencode', $this->replace);

$new_uri = strtr($this->target, $this->replace);
        $new_uri = $this->parser->parse($new_uri);
        // don't redirect if the target host is the same as the
        // starting host
        if ($uri->host === $new_uri->host) {
            return true;
        }
        $uri = $new_uri; // overwrite
        return true;
    }

protected function makeReplace($uri, $config, $context)
    {
        $string = $uri->toString();
        // always available
        $this->replace['%s'] = $string;
        $this->replace['%r'] = $context->get('EmbeddedURI', true);
        $token = $context->get('CurrentToken', true);
        $this->replace['%n'] = $token ? $token->name : null;
        $this->replace['%m'] = $context->get('CurrentAttr', true);
        $this->replace['%p'] = $context->get('CurrentCSSProperty', true);
        // not always available
        if ($this->secretKey) {
            $this->replace['%t'] = sha1($this->secretKey.':'.$string);
        }
    }
}

// vim: et sw=4 sts=4

[+] ..
[-] Munge.php [edit]
[-] HostBlacklist.php [edit]
[-] DisableExternal.php [edit]
[-] SafeIframe.php [edit]
[-] MakeAbsolute.php [edit]
[-] DisableResources.php [edit]
[-] DisableExternalResources.php [edit]