mirror of
https://github.com/ezyang/htmlpurifier.git
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35f8b3c801
git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1539 48356398-32a2-884e-a903-53898d9a118a
94 lines
2.7 KiB
PHP
94 lines
2.7 KiB
PHP
<?php
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// special case filtering directives
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// disabling directives
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/**
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* Validates a URI as defined by RFC 3986.
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* @note Scheme-specific mechanics deferred to HTMLPurifier_URIScheme
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*/
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class HTMLPurifier_AttrDef_URI extends HTMLPurifier_AttrDef
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{
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protected $parser, $percentEncoder;
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protected $embedsResource;
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/**
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* @param $embeds_resource_resource Does the URI here result in an extra HTTP request?
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*/
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public function __construct($embeds_resource = false) {
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$this->parser = new HTMLPurifier_URIParser();
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$this->percentEncoder = new HTMLPurifier_PercentEncoder();
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$this->embedsResource = (bool) $embeds_resource;
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}
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public function validate($uri, $config, $context) {
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if ($config->get('URI', 'Disable')) return false;
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// initial operations
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$uri = $this->parseCDATA($uri);
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$uri = $this->percentEncoder->normalize($uri);
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// parse the URI
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$uri = $this->parser->parse($uri);
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if ($uri === false) return false;
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// add embedded flag to context for validators
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$context->register('EmbeddedURI', $this->embedsResource);
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$ok = false;
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do {
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// generic validation
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$result = $uri->validate($config, $context);
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if (!$result) break;
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// chained filtering
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$uri_def =& $config->getDefinition('URI');
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$result = $uri_def->filter($uri, $config, $context);
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if (!$result) break;
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// scheme-specific validation
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$scheme_obj = $uri->getSchemeObj($config, $context);
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if (!$scheme_obj) break;
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if ($this->embedsResource && !$scheme_obj->browsable) break;
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$result = $scheme_obj->validate($uri, $config, $context);
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if (!$result) break;
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// survived gauntlet
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$ok = true;
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} while (false);
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$context->destroy('EmbeddedURI');
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if (!$ok) return false;
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// munge scheme off if necessary (this must be last)
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if (!is_null($uri->scheme) && is_null($uri->host)) {
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if ($uri_def->defaultScheme == $uri->scheme) {
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$uri->scheme = null;
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}
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}
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// back to string
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$result = $uri->toString();
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// munge entire URI if necessary
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if (
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!is_null($uri->host) && // indicator for authority
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!empty($scheme_obj->browsable) &&
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!is_null($munge = $config->get('URI', 'Munge'))
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) {
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$result = str_replace('%s', rawurlencode($result), $munge);
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}
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return $result;
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}
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}
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