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[2.1.0] Genericize element contents removal. This is done in a slightly hacky way since ElementDef is not available, but should be sufficient.

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git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1313 48356398-32a2-884e-a903-53898d9a118a
This commit is contained in:
Edward Z. Yang 2007-07-11 20:42:58 +00:00
parent 732fe5cad7
commit 89622c964e
5 changed files with 56 additions and 14 deletions
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3
NEWS
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@ -31,6 +31,9 @@ NEWS ( CHANGELOG and HISTORY ) HTMLPurifier
%HTML.Allowed
. ConfigForm generates textareas instead of text inputs for lists, hashes,
lookups, text and itext fields
. Hidden element content removal genericized: %Core.HiddenElements can
be used to customize this behavior, by default <script> and <style> are
hidden
2.0.1, released 2007-06-27
! Tag auto-closing now based on a ChildDef heuristic rather than a

2
library/HTMLPurifier/Language/messages/en.php
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@ -28,7 +28,7 @@ $messages = array(
'Strategy_RemoveForeignElements: Foreign element to text' => 'Unrecognized $CurrentToken.Serialized tag converted to text',
'Strategy_RemoveForeignElements: Foreign element removed' => 'Unrecognized $CurrentToken.Serialized tag removed',
'Strategy_RemoveForeignElements: Comment removed' => 'Comment containing "$CurrentToken.Data" removed',
'Strategy_RemoveForeignElements: Script removed' => 'Script removed',
'Strategy_RemoveForeignElements: Foreign meta element removed' => 'Unrecognized $CurrentToken.Serialized meta tag and all descendants removed',
'Strategy_RemoveForeignElements: Token removed to end' => 'Tags and text starting from $1 element where removed to end',
'Strategy_MakeWellFormed: Unnecessary end tag removed' => 'Unnecessary $CurrentToken.Serialized tag removed',

50
library/HTMLPurifier/Strategy/RemoveForeignElements.php
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@ -8,19 +8,38 @@ require_once 'HTMLPurifier/TagTransform.php';
require_once 'HTMLPurifier/AttrValidator.php';
HTMLPurifier_ConfigSchema::define(
'Core', 'RemoveInvalidImg', true, 'bool',
'This directive enables pre-emptive URI checking in <code>img</code> '.
'tags, as the attribute validation strategy is not authorized to '.
'remove elements from the document. This directive has been available '.
'since 1.3.0, revert to pre-1.3.0 behavior by setting to false.'
'Core', 'RemoveInvalidImg', true, 'bool', '
<p>
This directive enables pre-emptive URI checking in <code>img</code>
tags, as the attribute validation strategy is not authorized to
remove elements from the document. This directive has been available
since 1.3.0, revert to pre-1.3.0 behavior by setting to false.
</p>
'
);
HTMLPurifier_ConfigSchema::define(
'Core', 'RemoveScriptContents', true, 'bool', '
'Core', 'RemoveScriptContents', null, 'bool/null', '
<p>
This directive enables HTML Purifier to remove not only script tags
but all of their contents. This directive has been available since 2.0.0,
revert to pre-2.0.0 behavior by setting to false.
but all of their contents. This directive has been deprecated since 2.1.0,
and when not set the value of %Core.HiddenElements will take
precedence. This directive has been available since 2.0.0, and can be used to
revert to pre-2.0.0 behavior by setting it to false.
</p>
'
);
HTMLPurifier_ConfigSchema::define(
'Core', 'HiddenElements', array('script' => true, 'style' => true), 'lookup', '
<p>
This directive is a lookup array of elements which should have their
contents removed when they are not allowed by the HTML definition.
For example, the contents of a <code>script</code> tag are not
normally shown in a document, so if script tags are to be removed,
their contents should be removed to. This is opposed to a <code>b</code>
tag, which defines some presentational changes but does not hide its
contents.
</p>
'
);
@ -43,7 +62,16 @@ class HTMLPurifier_Strategy_RemoveForeignElements extends HTMLPurifier_Strategy
$escape_invalid_tags = $config->get('Core', 'EscapeInvalidTags');
$remove_invalid_img = $config->get('Core', 'RemoveInvalidImg');
$remove_script_contents = $config->get('Core', 'RemoveScriptContents');
$hidden_elements = $config->get('Core', 'HiddenElements');
// remove script contents compatibility
if ($remove_script_contents === true) {
$hidden_elements['script'] = true;
} elseif ($remove_script_contents === false && isset($hidden_elements['script'])) {
unset($hidden_elements['script']);
}
$attr_validator = new HTMLPurifier_AttrValidator();
@ -107,7 +135,7 @@ class HTMLPurifier_Strategy_RemoveForeignElements extends HTMLPurifier_Strategy
}
// CAN BE GENERICIZED
if ($token->name == 'script' && $token->type == 'start') {
if (isset($hidden_elements[$token->name]) && $token->type == 'start') {
$textify_comments = $token->name;
} elseif ($token->name === $textify_comments && $token->type == 'end') {
$textify_comments = false;
@ -122,7 +150,7 @@ class HTMLPurifier_Strategy_RemoveForeignElements extends HTMLPurifier_Strategy
} else {
// check if we need to destroy all of the tag's children
// CAN BE GENERICIZED
if (($token->name == 'script' && $remove_script_contents) || $token->name == 'style') {
if (isset($hidden_elements[$token->name])) {
if ($token->type == 'start') {
$remove_until = $token->name;
} elseif ($token->type == 'empty') {
@ -130,7 +158,7 @@ class HTMLPurifier_Strategy_RemoveForeignElements extends HTMLPurifier_Strategy
} else {
$remove_until = false;
}
if ($e) $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Script removed');
if ($e) $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Foreign meta element removed');
} else {
if ($e) $e->send(E_ERROR, 'Strategy_RemoveForeignElements: Foreign element removed');
}

11
tests/HTMLPurifier/Strategy/RemoveForeignElementsTest.php
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@ -30,12 +30,23 @@ class HTMLPurifier_Strategy_RemoveForeignElementsTest
''
);
$this->assertResult(
'<style>.foo {blink;}</style>',
''
);
$this->assertResult(
'<script>alert();</script>',
'alert();',
array('Core.RemoveScriptContents' => false)
);
$this->assertResult(
'<script>alert();</script>',
'alert();',
array('Core.HiddenElements' => array())
);
$this->assertResult(
'<menu><li>Item 1</li></menu>',
'<ul><li>Item 1</li></ul>'

4
tests/HTMLPurifier/Strategy/RemoveForeignElements_ErrorsTest.php
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@ -48,8 +48,8 @@ class HTMLPurifier_Strategy_RemoveForeignElements_ErrorsTest extends HTMLPurifie
$this->invoke('<!-- test -->');
}
function testScriptRemoved() {
$this->collector->expectAt(0, 'send', array(E_ERROR, 'Strategy_RemoveForeignElements: Script removed'));
function testForeignMetaElementRemoved() {
$this->collector->expectAt(0, 'send', array(E_ERROR, 'Strategy_RemoveForeignElements: Foreign meta element removed'));
$this->collector->expectContextAt(0, 'CurrentToken', new HTMLPurifier_Token_Start('script', array(), 1));
$this->collector->expectAt(1, 'send', array(E_ERROR, 'Strategy_RemoveForeignElements: Token removed to end', 'script'));
$this->invoke('<script>asdf');