cakephp2-php8/cake/libs/view/helper.php
mark_story af021cb4b2 Adding Html entity conversion to all urls generated by helpers, fixing potential for merged passedArgs to create xss vectors.
Adding integer cast in paginate() to page param. 
Tests added/updated.
Fixes #6134

git-svn-id: https://svn.cakephp.org/repo/branches/1.2.x.x@8061 3807eeeb-6ff5-0310-8944-8be069107fe0
2009-02-25 19:51:41 +00:00

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PHP

<?php
/* SVN FILE: $Id$ */
/**
* Backend for helpers.
*
* Internal methods for the Helpers.
*
* PHP versions 4 and 5
*
* CakePHP(tm) : Rapid Development Framework (http://www.cakephp.org)
* Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @filesource
* @copyright Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
* @link http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
* @package cake
* @subpackage cake.cake.libs.view
* @since CakePHP(tm) v 0.2.9
* @version $Revision$
* @modifiedby $LastChangedBy$
* @lastmodified $Date$
* @license http://www.opensource.org/licenses/mit-license.php The MIT License
*/
/**
* Included libs
*/
App::import('Core', 'Overloadable');
/**
* Backend for helpers.
*
* Long description for class
*
* @package cake
* @subpackage cake.cake.libs.view
*/
class Helper extends Overloadable {
/**
* List of helpers used by this helper
*
* @var array
*/
var $helpers = null;
/**
* Base URL
*
* @var string
*/
var $base = null;
/**
* Webroot path
*
* @var string
*/
var $webroot = null;
/**
* Theme name
*
* @var string
*/
var $themeWeb = null;
/**
* URL to current action.
*
* @var string
*/
var $here = null;
/**
* Parameter array.
*
* @var array
*/
var $params = array();
/**
* Current action.
*
* @var string
*/
var $action = null;
/**
* Plugin path
*
* @var string
*/
var $plugin = null;
/**
* POST data for models
*
* @var array
*/
var $data = null;
/**
* List of named arguments
*
* @var array
*/
var $namedArgs = null;
/**
* URL argument separator character
*
* @var string
*/
var $argSeparator = null;
/**
* Contains model validation errors of form post-backs
*
* @access public
* @var array
*/
var $validationErrors = null;
/**
* Holds tag templates.
*
* @access public
* @var array
*/
var $tags = array();
/**
* Holds the content to be cleaned.
*
* @access private
* @var mixed
*/
var $__tainted = null;
/**
* Holds the cleaned content.
*
* @access private
* @var mixed
*/
var $__cleaned = null;
/**
* Default overload methods
*
* @access protected
*/
function get__($name) {}
function set__($name, $value) {}
function call__($method, $params) {
trigger_error(sprintf(__('Method %1$s::%2$s does not exist', true), get_class($this), $method), E_USER_WARNING);
}
/**
* Parses tag templates into $this->tags.
*
* @param $name file name
* @return array merged tags from config/$name.php
*/
function loadConfig($name = 'tags') {
if (file_exists(CONFIGS . $name .'.php')) {
require(CONFIGS . $name .'.php');
if (isset($tags)) {
$this->tags = array_merge($this->tags, $tags);
}
}
return $this->tags;
}
/**
* Finds URL for specified action.
*
* Returns an URL pointing to a combination of controller and action. Param
* $url can be:
* + Empty - the method will find adress to actuall controller/action.
* + '/' - the method will find base URL of application.
* + A combination of controller/action - the method will find url for it.
*
* @param mixed $url Cake-relative URL, like "/products/edit/92" or "/presidents/elect/4"
* or an array specifying any of the following: 'controller', 'action',
* and/or 'plugin', in addition to named arguments (keyed array elements),
* and standard URL arguments (indexed array elements)
* @param boolean $full If true, the full base URL will be prepended to the result
* @return string Full translated URL with base path.
*/
function url($url = null, $full = false) {
return h(Router::url($url, $full));
}
/**
* Checks if a file exists when theme is used, if no file is found default location is returned
*
* @param string $file
* @return string $webPath web path to file.
*/
function webroot($file) {
$webPath = "{$this->webroot}" . $file;
if (!empty($this->themeWeb)) {
$os = env('OS');
if (!empty($os) && strpos($os, 'Windows') !== false) {
if (strpos(WWW_ROOT . $this->themeWeb . $file, '\\') !== false) {
$path = str_replace('/', '\\', WWW_ROOT . $this->themeWeb . $file);
}
} else {
$path = WWW_ROOT . $this->themeWeb . $file;
}
if (file_exists($path)) {
$webPath = "{$this->webroot}" . $this->themeWeb . $file;
}
}
if (strpos($webPath, '//') !== false) {
return str_replace('//', '/', $webPath);
}
return $webPath;
}
/**
* Used to remove harmful tags from content
*
* @param mixed $output
* @return cleaned content for output
* @access public
*/
function clean($output) {
$this->__reset();
if (empty($output)) {
return null;
}
if (is_array($output)) {
foreach ($output as $key => $value) {
$return[$key] = $this->clean($value);
}
return $return;
}
$this->__tainted = $output;
$this->__clean();
return $this->__cleaned;
}
/**
* Returns a space-delimited string with items of the $options array. If a
* key of $options array happens to be one of:
* + 'compact'
* + 'checked'
* + 'declare'
* + 'readonly'
* + 'disabled'
* + 'selected'
* + 'defer'
* + 'ismap'
* + 'nohref'
* + 'noshade'
* + 'nowrap'
* + 'multiple'
* + 'noresize'
*
* And its value is one of:
* + 1
* + true
* + 'true'
*
* Then the value will be reset to be identical with key's name.
* If the value is not one of these 3, the parameter is not output.
*
* @param array $options Array of options.
* @param array $exclude Array of options to be excluded.
* @param string $insertBefore String to be inserted before options.
* @param string $insertAfter String to be inserted ater options.
* @return string
*/
function _parseAttributes($options, $exclude = null, $insertBefore = ' ', $insertAfter = null) {
if (is_array($options)) {
$options = array_merge(array('escape' => true), $options);
if (!is_array($exclude)) {
$exclude = array();
}
$keys = array_diff(array_keys($options), array_merge((array)$exclude, array('escape')));
$values = array_intersect_key(array_values($options), $keys);
$escape = $options['escape'];
$attributes = array();
foreach ($keys as $index => $key) {
$attributes[] = $this->__formatAttribute($key, $values[$index], $escape);
}
$out = implode(' ', $attributes);
} else {
$out = $options;
}
return $out ? $insertBefore . $out . $insertAfter : '';
}
/**
* @param string $key
* @param string $value
* @return string
* @access private
*/
function __formatAttribute($key, $value, $escape = true) {
$attribute = '';
$attributeFormat = '%s="%s"';
$minimizedAttributes = array('compact', 'checked', 'declare', 'readonly', 'disabled', 'selected', 'defer', 'ismap', 'nohref', 'noshade', 'nowrap', 'multiple', 'noresize');
if (is_array($value)) {
$value = '';
}
if (in_array($key, $minimizedAttributes)) {
if ($value === 1 || $value === true || $value === 'true' || $value == $key) {
$attribute = sprintf($attributeFormat, $key, $key);
}
} else {
$attribute = sprintf($attributeFormat, $key, ($escape ? h($value) : $value));
}
return $attribute;
}
/**
* Sets this helper's model and field properties to the dot-separated value-pair in $entity.
*
* @param mixed $entity A field name, like "ModelName.fieldName" or "ModelName.ID.fieldName"
* @param boolean $setScope Sets the view scope to the model specified in $tagValue
* @return void
*/
function setEntity($entity, $setScope = false) {
$view =& ClassRegistry::getObject('view');
if ($setScope) {
$view->modelScope = false;
} elseif (join('.', $view->entity()) == $entity) {
return;
}
if ($entity === null) {
$view->model = null;
$view->association = null;
$view->modelId = null;
$view->modelScope = false;
return;
}
$model = $view->model;
$sameScope = $hasField = false;
$parts = array_values(Set::filter(explode('.', $entity), true));
if (empty($parts)) {
return;
}
if (count($parts) === 1 || is_numeric($parts[0])) {
$sameScope = true;
} else {
if (ClassRegistry::isKeySet($parts[0])) {
$model = $parts[0];
}
}
if (ClassRegistry::isKeySet($model)) {
$ModelObj =& ClassRegistry::getObject($model);
for ($i = 0; $i < count($parts); $i++) {
if ($ModelObj->hasField($parts[$i]) || array_key_exists($parts[$i], $ModelObj->validate)) {
$hasField = $i;
if ($hasField === 0 || ($hasField === 1 && is_numeric($parts[0]))) {
$sameScope = true;
}
break;
}
}
if ($sameScope === true && in_array($parts[0], array_keys($ModelObj->hasAndBelongsToMany))) {
$sameScope = false;
}
}
if (!$view->association && $parts[0] == $view->field && $view->field != $view->model) {
array_unshift($parts, $model);
$hasField = true;
}
$view->field = $view->modelId = $view->fieldSuffix = $view->association = null;
switch (count($parts)) {
case 1:
if ($view->modelScope === false) {
$view->model = $parts[0];
} else {
$view->field = $parts[0];
if ($sameScope === false) {
$view->association = $parts[0];
}
}
break;
case 2:
if ($view->modelScope === false) {
list($view->model, $view->field) = $parts;
} elseif ($sameScope === true && $hasField === 0) {
list($view->field, $view->fieldSuffix) = $parts;
} elseif ($sameScope === true && $hasField === 1) {
list($view->modelId, $view->field) = $parts;
} else {
list($view->association, $view->field) = $parts;
}
break;
case 3:
if ($sameScope === true && $hasField === 1) {
list($view->modelId, $view->field, $view->fieldSuffix) = $parts;
} elseif ($hasField === 2) {
list($view->association, $view->modelId, $view->field) = $parts;
} else {
list($view->association, $view->field, $view->fieldSuffix) = $parts;
}
break;
case 4:
if ($parts[0] === $view->model) {
list($view->model, $view->modelId, $view->field, $view->fieldSuffix) = $parts;
} else {
list($view->association, $view->modelId, $view->field, $view->fieldSuffix) = $parts;
}
break;
}
if (!isset($view->model) || empty($view->model)) {
$view->model = $view->association;
$view->association = null;
} elseif ($view->model === $view->association) {
$view->association = null;
}
if ($setScope) {
$view->modelScope = true;
}
}
/**
* Gets the currently-used model of the rendering context.
*
* @return string
*/
function model() {
$view =& ClassRegistry::getObject('view');
if (!empty($view->association)) {
return $view->association;
} else {
return $view->model;
}
}
/**
* Gets the ID of the currently-used model of the rendering context.
*
* @return mixed
*/
function modelID() {
$view =& ClassRegistry::getObject('view');
return $view->modelId;
}
/**
* Gets the currently-used model field of the rendering context.
*
* @return string
*/
function field() {
$view =& ClassRegistry::getObject('view');
return $view->field;
}
/**
* Returns false if given FORM field has no errors. Otherwise it returns the constant set in the array Model->validationErrors.
*
* @param string $model Model name as string
* @param string $field Fieldname as string
* @param integer $modelID Unique index identifying this record within the form
* @return boolean True on errors.
*/
function tagIsInvalid($model = null, $field = null, $modelID = null) {
foreach (array('model', 'field', 'modelID') as $key) {
if (empty(${$key})) {
${$key} = $this->{$key}();
}
}
$view =& ClassRegistry::getObject('view');
$errors = $this->validationErrors;
if ($view->model !== $model && isset($errors[$view->model][$model])) {
$errors = $errors[$view->model];
}
if (!isset($modelID)) {
return empty($errors[$model][$field]) ? 0 : $errors[$model][$field];
} else {
return empty($errors[$model][$modelID][$field]) ? 0 : $errors[$model][$modelID][$field];
}
}
/**
* Generates a DOM ID for the selected element, if one is not set.
*
* @param mixed $options
* @param string $id
* @return mixed
*/
function domId($options = null, $id = 'id') {
$view =& ClassRegistry::getObject('view');
if (is_array($options) && array_key_exists($id, $options) && $options[$id] === null) {
unset($options[$id]);
return $options;
} elseif (!is_array($options) && $options !== null) {
$this->setEntity($options);
return $this->domId();
}
$dom = $this->model() . $this->modelID() . Inflector::camelize($view->field) . Inflector::camelize($view->fieldSuffix);
if (is_array($options) && !array_key_exists($id, $options)) {
$options[$id] = $dom;
} elseif ($options === null) {
return $dom;
}
return $options;
}
/**
* Gets the input field name for the current tag
*
* @param array $options
* @param string $key
* @return array
*/
function __name($options = array(), $field = null, $key = 'name') {
$view =& ClassRegistry::getObject('view');
if ($options === null) {
$options = array();
} elseif (is_string($options)) {
$field = $options;
$options = 0;
}
if (!empty($field)) {
$this->setEntity($field);
}
if (is_array($options) && array_key_exists($key, $options)) {
return $options;
}
switch ($field) {
case '_method':
$name = $field;
break;
default:
$name = 'data[' . join('][', $view->entity()) . ']';
break;
}
if (is_array($options)) {
$options[$key] = $name;
return $options;
} else {
return $name;
}
}
/**
* Gets the data for the current tag
*
* @param array $options
* @param string $key
* @return array
* @access public
*/
function value($options = array(), $field = null, $key = 'value') {
if ($options === null) {
$options = array();
} elseif (is_string($options)) {
$field = $options;
$options = 0;
}
if (!empty($field)) {
$this->setEntity($field);
}
if (is_array($options) && isset($options[$key])) {
return $options;
}
$result = null;
$modelName = $this->model();
$fieldName = $this->field();
$modelID = $this->modelID();
if (is_null($fieldName)) {
$fieldName = $modelName;
$modelName = null;
}
if (isset($this->data[$fieldName]) && $modelName === null) {
$result = $this->data[$fieldName];
} elseif (isset($this->data[$modelName][$fieldName])) {
$result = $this->data[$modelName][$fieldName];
} elseif (isset($this->data[$fieldName]) && is_array($this->data[$fieldName])) {
if (ClassRegistry::isKeySet($fieldName)) {
$model =& ClassRegistry::getObject($fieldName);
$result = $this->__selectedArray($this->data[$fieldName], $model->primaryKey);
}
} elseif (isset($this->data[$modelName][$modelID][$fieldName])) {
$result = $this->data[$modelName][$modelID][$fieldName];
}
if (is_array($result)) {
$view =& ClassRegistry::getObject('view');
if (isset($result[$view->fieldSuffix])) {
$result = $result[$view->fieldSuffix];
}
}
if (is_array($options)) {
if (empty($result) && isset($options['default'])) {
$result = $options['default'];
}
unset($options['default']);
}
if (is_array($options)) {
$options[$key] = $result;
return $options;
} else {
return $result;
}
}
/**
* Sets the defaults for an input tag
*
* @param array $options
* @param string $key
* @return array
* @access protected
*/
function _initInputField($field, $options = array()) {
if ($field !== null) {
$this->setEntity($field);
}
$options = (array)$options;
$options = $this->__name($options);
$options = $this->value($options);
$options = $this->domId($options);
if ($this->tagIsInvalid()) {
$options = $this->addClass($options, 'form-error');
}
return $options;
}
/**
* Adds the given class to the element options
*
* @param array $options
* @param string $class
* @param string $key
* @return array
*/
function addClass($options = array(), $class = null, $key = 'class') {
if (isset($options[$key]) && trim($options[$key]) != '') {
$options[$key] .= ' ' . $class;
} else {
$options[$key] = $class;
}
return $options;
}
/**
* Returns a string generated by a helper method
*
* This method can be overridden in subclasses to do generalized output post-processing
*
* @param string $str String to be output.
* @return string
*/
function output($str) {
return $str;
}
/**
* Before render callback. Overridden in subclasses.
*
*/
function beforeRender() {
}
/**
* After render callback. Overridden in subclasses.
*
*/
function afterRender() {
}
/**
* Before layout callback. Overridden in subclasses.
*
*/
function beforeLayout() {
}
/**
* After layout callback. Overridden in subclasses.
*
*/
function afterLayout() {
}
/**
* Transforms a recordset from a hasAndBelongsToMany association to a list of selected
* options for a multiple select element
*
* @param mixed $data
* @param string $key
* @return array
* @access private
*/
function __selectedArray($data, $key = 'id') {
if (!is_array($data)) {
$model = $data;
if (!empty($this->data[$model][$model])) {
return $this->data[$model][$model];
}
if (!empty($this->data[$model])) {
$data = $this->data[$model];
}
}
$array = array();
if (!empty($data)) {
foreach ($data as $var) {
$array[$var[$key]] = $var[$key];
}
}
return $array;
}
/**
* Resets the vars used by Helper::clean() to null
*
* @access private
*/
function __reset() {
$this->__tainted = null;
$this->__cleaned = null;
}
/**
* Removes harmful content from output
*
* @access private
*/
function __clean() {
if (get_magic_quotes_gpc()) {
$this->__cleaned = stripslashes($this->__tainted);
} else {
$this->__cleaned = $this->__tainted;
}
$this->__cleaned = str_replace(array("&amp;", "&lt;", "&gt;"), array("&amp;amp;", "&amp;lt;", "&amp;gt;"), $this->__cleaned);
$this->__cleaned = preg_replace('#(&\#*\w+)[\x00-\x20]+;#u', "$1;", $this->__cleaned);
$this->__cleaned = preg_replace('#(&\#x*)([0-9A-F]+);*#iu', "$1$2;", $this->__cleaned);
$this->__cleaned = html_entity_decode($this->__cleaned, ENT_COMPAT, "UTF-8");
$this->__cleaned = preg_replace('#(<[^>]+[\x00-\x20\"\'\/])(on|xmlns)[^>]*>#iUu', "$1>", $this->__cleaned);
$this->__cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*)[\\x00-\x20]*j[\x00-\x20]*a[\x00-\x20]*v[\x00-\x20]*a[\x00-\x20]*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:#iUu', '$1=$2nojavascript...', $this->__cleaned);
$this->__cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=([\'\"]*)[\x00-\x20]*v[\x00-\x20]*b[\x00-\x20]*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:#iUu', '$1=$2novbscript...', $this->__cleaned);
$this->__cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=*([\'\"]*)[\x00-\x20]*-moz-binding[\x00-\x20]*:#iUu','$1=$2nomozbinding...', $this->__cleaned);
$this->__cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=([\'\"]*)[\x00-\x20]*data[\x00-\x20]*:#Uu', '$1=$2nodata...', $this->__cleaned);
$this->__cleaned = preg_replace('#(<[^>]+)style[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*).*expression[\x00-\x20]*\([^>]*>#iU', "$1>", $this->__cleaned);
$this->__cleaned = preg_replace('#(<[^>]+)style[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*).*behaviour[\x00-\x20]*\([^>]*>#iU', "$1>", $this->__cleaned);
$this->__cleaned = preg_replace('#(<[^>]+)style[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*).*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:*[^>]*>#iUu', "$1>", $this->__cleaned);
$this->__cleaned = preg_replace('#</*\w+:\w[^>]*>#i', "", $this->__cleaned);
do {
$oldstring = $this->__cleaned;
$this->__cleaned = preg_replace('#</*(applet|meta|xml|blink|link|style|script|embed|object|iframe|frame|frameset|ilayer|layer|bgsound|title|base)[^>]*>#i', "", $this->__cleaned);
} while ($oldstring != $this->__cleaned);
$this->__cleaned = str_replace(array("&amp;", "&lt;", "&gt;"), array("&amp;amp;", "&amp;lt;", "&amp;gt;"), $this->__cleaned);
}
}
?>