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# Invalid images are now removed, rather than replaced with a dud <img src="" alt="Invalid image" />. Previous behavior can be restored with new directive %Core.RemoveInvalidImg set to false. ! New directives %URI.DisableExternalResources and %URI.DisableResources ! New directive %Attr.DisableURI, which eliminates all hyperlinking - Missing "Available since" documentation added git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@575 48356398-32a2-884e-a903-53898d9a118a
83 lines
3.2 KiB
PHP
83 lines
3.2 KiB
PHP
<?php
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require_once 'HTMLPurifier/Strategy.php';
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require_once 'HTMLPurifier/HTMLDefinition.php';
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require_once 'HTMLPurifier/Generator.php';
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require_once 'HTMLPurifier/TagTransform.php';
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HTMLPurifier_ConfigSchema::define(
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'Core', 'RemoveInvalidImg', true, 'bool',
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'This directive enables pre-emptive URI checking in <code>img</code> '.
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'tags, as the attribute validation strategy is not authorized to '.
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'remove elements from the document. This directive has been available '.
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'since 1.3.0, revert to pre-1.3.0 behavior by setting to false.'
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);
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/**
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* Removes all unrecognized tags from the list of tokens.
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*
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* This strategy iterates through all the tokens and removes unrecognized
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* tokens. If a token is not recognized but a TagTransform is defined for
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* that element, the element will be transformed accordingly.
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*/
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class HTMLPurifier_Strategy_RemoveForeignElements extends HTMLPurifier_Strategy
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{
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function execute($tokens, $config, &$context) {
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$definition = $config->getHTMLDefinition();
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$generator = new HTMLPurifier_Generator();
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$result = array();
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$escape_invalid_tags = $config->get('Core', 'EscapeInvalidTags');
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foreach($tokens as $token) {
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if (!empty( $token->is_tag )) {
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// DEFINITION CALL
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if (isset($definition->info[$token->name])) {
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// leave untouched, except for a few special cases:
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// hard-coded image special case, pre-emptively drop
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// if not available. Probably not abstract-able
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if ( $token->name == 'img' ) {
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if (!isset($token->attr['src'])) continue;
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if (!isset($definition->info['img']->attr['src'])) {
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continue;
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}
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$token->attr['src'] =
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$definition->
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info['img']->
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attr['src']->
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validate($token->attr['src']);
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if ($token->attr['src'] === false) continue;
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}
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} elseif (
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isset($definition->info_tag_transform[$token->name])
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) {
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// there is a transformation for this tag
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// DEFINITION CALL
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$token = $definition->
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info_tag_transform[$token->name]->
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transform($token, $config, $context);
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} elseif ($escape_invalid_tags) {
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// invalid tag, generate HTML and insert in
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$token = new HTMLPurifier_Token_Text(
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$generator->generateFromToken($token, $config, $context)
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);
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} else {
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continue;
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}
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} elseif ($token->type == 'comment') {
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// strip comments
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continue;
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} elseif ($token->type == 'text') {
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} else {
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continue;
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}
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$result[] = $token;
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}
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return $result;
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}
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}
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?>
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