diff options
Diffstat (limited to 'lib/htmlpurifier/library/HTMLPurifier/VarParser')
-rwxr-xr-x | lib/htmlpurifier/library/HTMLPurifier/VarParser/Flexible.php | 96 | ||||
-rwxr-xr-x | lib/htmlpurifier/library/HTMLPurifier/VarParser/Native.php | 26 |
2 files changed, 122 insertions, 0 deletions
diff --git a/lib/htmlpurifier/library/HTMLPurifier/VarParser/Flexible.php b/lib/htmlpurifier/library/HTMLPurifier/VarParser/Flexible.php new file mode 100755 index 000000000..c954250e9 --- /dev/null +++ b/lib/htmlpurifier/library/HTMLPurifier/VarParser/Flexible.php @@ -0,0 +1,96 @@ +<?php + +/** + * Performs safe variable parsing based on types which can be used by + * users. This may not be able to represent all possible data inputs, + * however. + */ +class HTMLPurifier_VarParser_Flexible extends HTMLPurifier_VarParser +{ + + protected function parseImplementation($var, $type, $allow_null) { + if ($allow_null && $var === null) return null; + switch ($type) { + // Note: if code "breaks" from the switch, it triggers a generic + // exception to be thrown. Specific errors can be specifically + // done here. + case self::MIXED : + case self::ISTRING : + case self::STRING : + case self::TEXT : + case self::ITEXT : + return $var; + case self::INT : + if (is_string($var) && ctype_digit($var)) $var = (int) $var; + return $var; + case self::FLOAT : + if ((is_string($var) && is_numeric($var)) || is_int($var)) $var = (float) $var; + return $var; + case self::BOOL : + if (is_int($var) && ($var === 0 || $var === 1)) { + $var = (bool) $var; + } elseif (is_string($var)) { + if ($var == 'on' || $var == 'true' || $var == '1') { + $var = true; + } elseif ($var == 'off' || $var == 'false' || $var == '0') { + $var = false; + } else { + throw new HTMLPurifier_VarParserException("Unrecognized value '$var' for $type"); + } + } + return $var; + case self::ALIST : + case self::HASH : + case self::LOOKUP : + if (is_string($var)) { + // special case: technically, this is an array with + // a single empty string item, but having an empty + // array is more intuitive + if ($var == '') return array(); + if (strpos($var, "\n") === false && strpos($var, "\r") === false) { + // simplistic string to array method that only works + // for simple lists of tag names or alphanumeric characters + $var = explode(',',$var); + } else { + $var = preg_split('/(,|[\n\r]+)/', $var); + } + // remove spaces + foreach ($var as $i => $j) $var[$i] = trim($j); + if ($type === self::HASH) { + // key:value,key2:value2 + $nvar = array(); + foreach ($var as $keypair) { + $c = explode(':', $keypair, 2); + if (!isset($c[1])) continue; + $nvar[$c[0]] = $c[1]; + } + $var = $nvar; + } + } + if (!is_array($var)) break; + $keys = array_keys($var); + if ($keys === array_keys($keys)) { + if ($type == self::ALIST) return $var; + elseif ($type == self::LOOKUP) { + $new = array(); + foreach ($var as $key) { + $new[$key] = true; + } + return $new; + } else break; + } + if ($type === self::LOOKUP) { + foreach ($var as $key => $value) { + $var[$key] = true; + } + } + return $var; + default: + $this->errorInconsistent(__CLASS__, $type); + } + $this->errorGeneric($var, $type); + } + +} + +// vim: et sw=4 sts=4 diff --git a/lib/htmlpurifier/library/HTMLPurifier/VarParser/Native.php b/lib/htmlpurifier/library/HTMLPurifier/VarParser/Native.php new file mode 100755 index 000000000..b02a6de54 --- /dev/null +++ b/lib/htmlpurifier/library/HTMLPurifier/VarParser/Native.php @@ -0,0 +1,26 @@ +<?php + +/** + * This variable parser uses PHP's internal code engine. Because it does + * this, it can represent all inputs; however, it is dangerous and cannot + * be used by users. + */ +class HTMLPurifier_VarParser_Native extends HTMLPurifier_VarParser +{ + + protected function parseImplementation($var, $type, $allow_null) { + return $this->evalExpression($var); + } + + protected function evalExpression($expr) { + $var = null; + $result = eval("\$var = $expr;"); + if ($result === false) { + throw new HTMLPurifier_VarParserException("Fatal error in evaluated code"); + } + return $var; + } + +} + +// vim: et sw=4 sts=4 |