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8f797be836
- can be used via html class like:
$clean_html = html::purify($html);
- using it now in eTemplate to remove malicious code from html:
a) when displaying "formatted text"
b) when "formatted text" get's input by the user
97 lines
3.8 KiB
PHP
Executable File
97 lines
3.8 KiB
PHP
Executable File
<?php
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/**
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* Performs safe variable parsing based on types which can be used by
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* users. This may not be able to represent all possible data inputs,
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* however.
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*/
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class HTMLPurifier_VarParser_Flexible extends HTMLPurifier_VarParser
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{
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protected function parseImplementation($var, $type, $allow_null) {
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if ($allow_null && $var === null) return null;
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switch ($type) {
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// Note: if code "breaks" from the switch, it triggers a generic
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// exception to be thrown. Specific errors can be specifically
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// done here.
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case self::MIXED :
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case self::ISTRING :
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case self::STRING :
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case self::TEXT :
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case self::ITEXT :
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return $var;
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case self::INT :
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if (is_string($var) && ctype_digit($var)) $var = (int) $var;
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return $var;
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case self::FLOAT :
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if ((is_string($var) && is_numeric($var)) || is_int($var)) $var = (float) $var;
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return $var;
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case self::BOOL :
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if (is_int($var) && ($var === 0 || $var === 1)) {
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$var = (bool) $var;
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} elseif (is_string($var)) {
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if ($var == 'on' || $var == 'true' || $var == '1') {
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$var = true;
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} elseif ($var == 'off' || $var == 'false' || $var == '0') {
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$var = false;
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} else {
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throw new HTMLPurifier_VarParserException("Unrecognized value '$var' for $type");
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}
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}
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return $var;
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case self::ALIST :
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case self::HASH :
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case self::LOOKUP :
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if (is_string($var)) {
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// special case: technically, this is an array with
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// a single empty string item, but having an empty
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// array is more intuitive
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if ($var == '') return array();
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if (strpos($var, "\n") === false && strpos($var, "\r") === false) {
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// simplistic string to array method that only works
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// for simple lists of tag names or alphanumeric characters
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$var = explode(',',$var);
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} else {
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$var = preg_split('/(,|[\n\r]+)/', $var);
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}
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// remove spaces
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foreach ($var as $i => $j) $var[$i] = trim($j);
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if ($type === self::HASH) {
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// key:value,key2:value2
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$nvar = array();
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foreach ($var as $keypair) {
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$c = explode(':', $keypair, 2);
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if (!isset($c[1])) continue;
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$nvar[$c[0]] = $c[1];
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}
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$var = $nvar;
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}
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}
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if (!is_array($var)) break;
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$keys = array_keys($var);
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if ($keys === array_keys($keys)) {
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if ($type == self::ALIST) return $var;
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elseif ($type == self::LOOKUP) {
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$new = array();
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foreach ($var as $key) {
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$new[$key] = true;
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}
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return $new;
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} else break;
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}
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if ($type === self::LOOKUP) {
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foreach ($var as $key => $value) {
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$var[$key] = true;
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}
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}
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return $var;
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default:
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$this->errorInconsistent(__CLASS__, $type);
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}
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$this->errorGeneric($var, $type);
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}
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}
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// vim: et sw=4 sts=4
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