URI.php

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<?php
 
class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
{
 
    protected $parser;
 
    protected $embedsResource;
 
    public function __construct($embeds_resource = false)
    {
        $this->parser = new HTMLPurifier_URIParser();
        $this->embedsResource = (bool)$embeds_resource;
    }
 
    public function make($string)
    {
        $embeds = ($string === 'embedded');
        return new HTMLPurifier_AttrDef_URI($embeds);
    }
 
    public function validate($uri, $config, $context)
    {
        if ($config->get('URI.Disable')) {
            return false;
        }
 
        $uri = $this->parseCDATA($uri);
 
        // parse the URI
        $uri = $this->parser->parse($uri);
        if ($uri === false) {
            return false;
        }
 
        // add embedded flag to context for validators
        $context->register('EmbeddedURI', $this->embedsResource);
 
        $ok = false;
        do {
 
            // generic validation
            $result = $uri->validate($config, $context);
            if (!$result) {
                break;
            }
 
            // chained filtering
            $uri_def = $config->getDefinition('URI');
            $result = $uri_def->filter($uri, $config, $context);
            if (!$result) {
                break;
            }
 
            // scheme-specific validation
            $scheme_obj = $uri->getSchemeObj($config, $context);
            if (!$scheme_obj) {
                break;
            }
            if ($this->embedsResource && !$scheme_obj->browsable) {
                break;
            }
            $result = $scheme_obj->validate($uri, $config, $context);
            if (!$result) {
                break;
            }
 
            // Post chained filtering
            $result = $uri_def->postFilter($uri, $config, $context);
            if (!$result) {
                break;
            }
 
            // survived gauntlet
            $ok = true;
 
        } while (false);
 
        $context->destroy('EmbeddedURI');
        if (!$ok) {
            return false;
        }
        // back to string
        return $uri->toString();
    }
}
 
// vim: et sw=4 sts=4