729 lines
28 KiB
PHP
729 lines
28 KiB
PHP
<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Yaml;
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use Symfony\Component\Yaml\Exception\ParseException;
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use Symfony\Component\Yaml\Exception\DumpException;
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/**
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* Inline implements a YAML parser/dumper for the YAML inline syntax.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*
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* @internal
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*/
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class Inline
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{
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const REGEX_QUOTED_STRING = '(?:"([^"\\\\]*+(?:\\\\.[^"\\\\]*+)*+)"|\'([^\']*+(?:\'\'[^\']*+)*+)\')';
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public static $parsedLineNumber;
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private static $exceptionOnInvalidType = false;
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private static $objectSupport = false;
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private static $objectForMap = false;
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private static $constantSupport = false;
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/**
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* Converts a YAML string to a PHP value.
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*
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* @param string $value A YAML string
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* @param int $flags A bit field of PARSE_* constants to customize the YAML parser behavior
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* @param array $references Mapping of variable names to values
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*
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* @return mixed A PHP value
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*
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* @throws ParseException
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*/
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public static function parse($value, $flags = 0, $references = array())
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{
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if (is_bool($flags)) {
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@trigger_error('Passing a boolean flag to toggle exception handling is deprecated since version 3.1 and will be removed in 4.0. Use the Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE flag instead.', E_USER_DEPRECATED);
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if ($flags) {
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$flags = Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE;
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} else {
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$flags = 0;
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}
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}
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if (func_num_args() >= 3 && !is_array($references)) {
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@trigger_error('Passing a boolean flag to toggle object support is deprecated since version 3.1 and will be removed in 4.0. Use the Yaml::PARSE_OBJECT flag instead.', E_USER_DEPRECATED);
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if ($references) {
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$flags |= Yaml::PARSE_OBJECT;
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}
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if (func_num_args() >= 4) {
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@trigger_error('Passing a boolean flag to toggle object for map support is deprecated since version 3.1 and will be removed in 4.0. Use the Yaml::PARSE_OBJECT_FOR_MAP flag instead.', E_USER_DEPRECATED);
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if (func_get_arg(3)) {
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$flags |= Yaml::PARSE_OBJECT_FOR_MAP;
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}
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}
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if (func_num_args() >= 5) {
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$references = func_get_arg(4);
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} else {
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$references = array();
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}
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}
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self::$exceptionOnInvalidType = (bool) (Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE & $flags);
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self::$objectSupport = (bool) (Yaml::PARSE_OBJECT & $flags);
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self::$objectForMap = (bool) (Yaml::PARSE_OBJECT_FOR_MAP & $flags);
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self::$constantSupport = (bool) (Yaml::PARSE_CONSTANT & $flags);
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$value = trim($value);
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if ('' === $value) {
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return '';
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}
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if (2 /* MB_OVERLOAD_STRING */ & (int) ini_get('mbstring.func_overload')) {
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$mbEncoding = mb_internal_encoding();
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mb_internal_encoding('ASCII');
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}
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$i = 0;
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switch ($value[0]) {
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case '[':
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$result = self::parseSequence($value, $flags, $i, $references);
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++$i;
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break;
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case '{':
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$result = self::parseMapping($value, $flags, $i, $references);
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++$i;
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break;
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default:
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$result = self::parseScalar($value, $flags, null, array('"', "'"), $i, true, $references);
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}
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// some comments are allowed at the end
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if (preg_replace('/\s+#.*$/A', '', substr($value, $i))) {
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throw new ParseException(sprintf('Unexpected characters near "%s".', substr($value, $i)));
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}
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if (isset($mbEncoding)) {
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mb_internal_encoding($mbEncoding);
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}
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return $result;
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}
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/**
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* Dumps a given PHP variable to a YAML string.
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*
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* @param mixed $value The PHP variable to convert
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* @param int $flags A bit field of Yaml::DUMP_* constants to customize the dumped YAML string
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*
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* @return string The YAML string representing the PHP value
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*
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* @throws DumpException When trying to dump PHP resource
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*/
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public static function dump($value, $flags = 0)
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{
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if (is_bool($flags)) {
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@trigger_error('Passing a boolean flag to toggle exception handling is deprecated since version 3.1 and will be removed in 4.0. Use the Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE flag instead.', E_USER_DEPRECATED);
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if ($flags) {
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$flags = Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE;
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} else {
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$flags = 0;
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}
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}
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if (func_num_args() >= 3) {
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@trigger_error('Passing a boolean flag to toggle object support is deprecated since version 3.1 and will be removed in 4.0. Use the Yaml::DUMP_OBJECT flag instead.', E_USER_DEPRECATED);
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if (func_get_arg(2)) {
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$flags |= Yaml::DUMP_OBJECT;
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}
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}
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switch (true) {
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case is_resource($value):
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if (Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE & $flags) {
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throw new DumpException(sprintf('Unable to dump PHP resources in a YAML file ("%s").', get_resource_type($value)));
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}
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return 'null';
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case $value instanceof \DateTimeInterface:
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return $value->format('c');
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case is_object($value):
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if (Yaml::DUMP_OBJECT & $flags) {
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return '!php/object:'.serialize($value);
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}
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if (Yaml::DUMP_OBJECT_AS_MAP & $flags && ($value instanceof \stdClass || $value instanceof \ArrayObject)) {
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return self::dumpArray((array) $value, $flags);
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}
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if (Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE & $flags) {
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throw new DumpException('Object support when dumping a YAML file has been disabled.');
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}
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return 'null';
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case is_array($value):
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return self::dumpArray($value, $flags);
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case null === $value:
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return 'null';
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case true === $value:
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return 'true';
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case false === $value:
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return 'false';
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case ctype_digit($value):
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return is_string($value) ? "'$value'" : (int) $value;
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case is_numeric($value):
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$locale = setlocale(LC_NUMERIC, 0);
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if (false !== $locale) {
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setlocale(LC_NUMERIC, 'C');
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}
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if (is_float($value)) {
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$repr = (string) $value;
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if (is_infinite($value)) {
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$repr = str_ireplace('INF', '.Inf', $repr);
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} elseif (floor($value) == $value && $repr == $value) {
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// Preserve float data type since storing a whole number will result in integer value.
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$repr = '!!float '.$repr;
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}
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} else {
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$repr = is_string($value) ? "'$value'" : (string) $value;
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}
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if (false !== $locale) {
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setlocale(LC_NUMERIC, $locale);
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}
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return $repr;
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case '' == $value:
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return "''";
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case self::isBinaryString($value):
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return '!!binary '.base64_encode($value);
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case Escaper::requiresDoubleQuoting($value):
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return Escaper::escapeWithDoubleQuotes($value);
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case Escaper::requiresSingleQuoting($value):
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case preg_match('{^[0-9]+[_0-9]*$}', $value):
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case preg_match(self::getHexRegex(), $value):
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case preg_match(self::getTimestampRegex(), $value):
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return Escaper::escapeWithSingleQuotes($value);
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default:
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return $value;
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}
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}
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/**
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* Check if given array is hash or just normal indexed array.
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*
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* @internal
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*
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* @param array $value The PHP array to check
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*
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* @return bool true if value is hash array, false otherwise
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*/
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public static function isHash(array $value)
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{
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$expectedKey = 0;
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foreach ($value as $key => $val) {
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if ($key !== $expectedKey++) {
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return true;
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}
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}
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return false;
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}
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/**
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* Dumps a PHP array to a YAML string.
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*
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* @param array $value The PHP array to dump
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* @param int $flags A bit field of Yaml::DUMP_* constants to customize the dumped YAML string
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*
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* @return string The YAML string representing the PHP array
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*/
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private static function dumpArray($value, $flags)
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{
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// array
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if ($value && !self::isHash($value)) {
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$output = array();
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foreach ($value as $val) {
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$output[] = self::dump($val, $flags);
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}
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return sprintf('[%s]', implode(', ', $output));
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}
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// hash
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$output = array();
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foreach ($value as $key => $val) {
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$output[] = sprintf('%s: %s', self::dump($key, $flags), self::dump($val, $flags));
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}
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return sprintf('{ %s }', implode(', ', $output));
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}
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/**
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* Parses a YAML scalar.
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*
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* @param string $scalar
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* @param int $flags
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* @param string $delimiters
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* @param array $stringDelimiters
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* @param int &$i
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* @param bool $evaluate
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* @param array $references
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*
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* @return string
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*
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* @throws ParseException When malformed inline YAML string is parsed
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*
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* @internal
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*/
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public static function parseScalar($scalar, $flags = 0, $delimiters = null, $stringDelimiters = array('"', "'"), &$i = 0, $evaluate = true, $references = array())
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{
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if (in_array($scalar[$i], $stringDelimiters)) {
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// quoted scalar
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$output = self::parseQuotedScalar($scalar, $i);
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if (null !== $delimiters) {
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$tmp = ltrim(substr($scalar, $i), ' ');
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if (!in_array($tmp[0], $delimiters)) {
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throw new ParseException(sprintf('Unexpected characters (%s).', substr($scalar, $i)));
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}
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}
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} else {
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// "normal" string
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if (!$delimiters) {
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$output = substr($scalar, $i);
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$i += strlen($output);
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// remove comments
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if (preg_match('/[ \t]+#/', $output, $match, PREG_OFFSET_CAPTURE)) {
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$output = substr($output, 0, $match[0][1]);
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}
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} elseif (preg_match('/^(.+?)('.implode('|', $delimiters).')/', substr($scalar, $i), $match)) {
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$output = $match[1];
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$i += strlen($output);
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} else {
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throw new ParseException(sprintf('Malformed inline YAML string: %s.', $scalar));
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}
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// a non-quoted string cannot start with @ or ` (reserved) nor with a scalar indicator (| or >)
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if ($output && ('@' === $output[0] || '`' === $output[0] || '|' === $output[0] || '>' === $output[0])) {
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throw new ParseException(sprintf('The reserved indicator "%s" cannot start a plain scalar; you need to quote the scalar.', $output[0]));
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}
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if ($output && '%' === $output[0]) {
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@trigger_error(sprintf('Not quoting the scalar "%s" starting with the "%%" indicator character is deprecated since Symfony 3.1 and will throw a ParseException in 4.0.', $output), E_USER_DEPRECATED);
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}
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if ($evaluate) {
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$output = self::evaluateScalar($output, $flags, $references);
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}
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}
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return $output;
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}
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/**
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* Parses a YAML quoted scalar.
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*
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* @param string $scalar
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* @param int &$i
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*
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* @return string
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*
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* @throws ParseException When malformed inline YAML string is parsed
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*/
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private static function parseQuotedScalar($scalar, &$i)
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{
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if (!preg_match('/'.self::REGEX_QUOTED_STRING.'/Au', substr($scalar, $i), $match)) {
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throw new ParseException(sprintf('Malformed inline YAML string: %s.', substr($scalar, $i)));
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}
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$output = substr($match[0], 1, strlen($match[0]) - 2);
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$unescaper = new Unescaper();
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if ('"' == $scalar[$i]) {
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$output = $unescaper->unescapeDoubleQuotedString($output);
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} else {
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$output = $unescaper->unescapeSingleQuotedString($output);
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}
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$i += strlen($match[0]);
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return $output;
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}
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/**
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* Parses a YAML sequence.
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*
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* @param string $sequence
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* @param int $flags
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* @param int &$i
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* @param array $references
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*
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* @return array
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*
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* @throws ParseException When malformed inline YAML string is parsed
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*/
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private static function parseSequence($sequence, $flags, &$i = 0, $references = array())
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{
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$output = array();
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$len = strlen($sequence);
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++$i;
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// [foo, bar, ...]
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while ($i < $len) {
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switch ($sequence[$i]) {
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case '[':
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// nested sequence
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$output[] = self::parseSequence($sequence, $flags, $i, $references);
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break;
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case '{':
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// nested mapping
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$output[] = self::parseMapping($sequence, $flags, $i, $references);
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break;
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case ']':
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return $output;
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case ',':
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case ' ':
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break;
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default:
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$isQuoted = in_array($sequence[$i], array('"', "'"));
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$value = self::parseScalar($sequence, $flags, array(',', ']'), array('"', "'"), $i, true, $references);
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// the value can be an array if a reference has been resolved to an array var
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if (is_string($value) && !$isQuoted && false !== strpos($value, ': ')) {
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// embedded mapping?
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try {
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$pos = 0;
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$value = self::parseMapping('{'.$value.'}', $flags, $pos, $references);
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} catch (\InvalidArgumentException $e) {
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// no, it's not
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}
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}
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$output[] = $value;
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--$i;
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}
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++$i;
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}
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throw new ParseException(sprintf('Malformed inline YAML string: %s.', $sequence));
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}
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/**
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* Parses a YAML mapping.
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*
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* @param string $mapping
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* @param int $flags
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* @param int &$i
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* @param array $references
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*
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* @return array|\stdClass
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*
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* @throws ParseException When malformed inline YAML string is parsed
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*/
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private static function parseMapping($mapping, $flags, &$i = 0, $references = array())
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{
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$output = array();
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$len = strlen($mapping);
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++$i;
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// {foo: bar, bar:foo, ...}
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while ($i < $len) {
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switch ($mapping[$i]) {
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case ' ':
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case ',':
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++$i;
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continue 2;
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case '}':
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if (self::$objectForMap) {
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return (object) $output;
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}
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return $output;
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}
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// key
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$key = self::parseScalar($mapping, $flags, array(':', ' '), array('"', "'"), $i, false);
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if (':' !== $key && false === $i = strpos($mapping, ':', $i)) {
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break;
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}
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if (':' !== $key && (!isset($mapping[$i + 1]) || !in_array($mapping[$i + 1], array(' ', ',', '[', ']', '{', '}'), true))) {
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@trigger_error('Using a colon that is not followed by an indication character (i.e. " ", ",", "[", "]", "{", "}" is deprecated since version 3.2 and will throw a ParseException in 4.0.', E_USER_DEPRECATED);
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}
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// value
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$done = false;
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while ($i < $len) {
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switch ($mapping[$i]) {
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case '[':
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// nested sequence
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$value = self::parseSequence($mapping, $flags, $i, $references);
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// Spec: Keys MUST be unique; first one wins.
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// Parser cannot abort this mapping earlier, since lines
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// are processed sequentially.
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if (!isset($output[$key])) {
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$output[$key] = $value;
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} else {
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@trigger_error(sprintf('Duplicate key "%s" detected on line %d whilst parsing YAML. Silent handling of duplicate mapping keys in YAML is deprecated since version 3.2 and will throw \Symfony\Component\Yaml\Exception\ParseException in 4.0.', $key, self::$parsedLineNumber + 1), E_USER_DEPRECATED);
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}
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$done = true;
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break;
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case '{':
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// nested mapping
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$value = self::parseMapping($mapping, $flags, $i, $references);
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// Spec: Keys MUST be unique; first one wins.
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// Parser cannot abort this mapping earlier, since lines
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// are processed sequentially.
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if (!isset($output[$key])) {
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$output[$key] = $value;
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} else {
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@trigger_error(sprintf('Duplicate key "%s" detected on line %d whilst parsing YAML. Silent handling of duplicate mapping keys in YAML is deprecated since version 3.2 and will throw \Symfony\Component\Yaml\Exception\ParseException in 4.0.', $key, self::$parsedLineNumber + 1), E_USER_DEPRECATED);
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}
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$done = true;
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break;
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case ':':
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case ' ':
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break;
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default:
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$value = self::parseScalar($mapping, $flags, array(',', '}'), array('"', "'"), $i, true, $references);
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// Spec: Keys MUST be unique; first one wins.
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// Parser cannot abort this mapping earlier, since lines
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// are processed sequentially.
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if (!isset($output[$key])) {
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$output[$key] = $value;
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} else {
|
|
@trigger_error(sprintf('Duplicate key "%s" detected on line %d whilst parsing YAML. Silent handling of duplicate mapping keys in YAML is deprecated since version 3.2 and will throw \Symfony\Component\Yaml\Exception\ParseException in 4.0.', $key, self::$parsedLineNumber + 1), E_USER_DEPRECATED);
|
|
}
|
|
$done = true;
|
|
--$i;
|
|
}
|
|
|
|
++$i;
|
|
|
|
if ($done) {
|
|
continue 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
throw new ParseException(sprintf('Malformed inline YAML string: %s.', $mapping));
|
|
}
|
|
|
|
/**
|
|
* Evaluates scalars and replaces magic values.
|
|
*
|
|
* @param string $scalar
|
|
* @param int $flags
|
|
* @param array $references
|
|
*
|
|
* @return string A YAML string
|
|
*
|
|
* @throws ParseException when object parsing support was disabled and the parser detected a PHP object or when a reference could not be resolved
|
|
*/
|
|
private static function evaluateScalar($scalar, $flags, $references = array())
|
|
{
|
|
$scalar = trim($scalar);
|
|
$scalarLower = strtolower($scalar);
|
|
|
|
if (0 === strpos($scalar, '*')) {
|
|
if (false !== $pos = strpos($scalar, '#')) {
|
|
$value = substr($scalar, 1, $pos - 2);
|
|
} else {
|
|
$value = substr($scalar, 1);
|
|
}
|
|
|
|
// an unquoted *
|
|
if (false === $value || '' === $value) {
|
|
throw new ParseException('A reference must contain at least one character.');
|
|
}
|
|
|
|
if (!array_key_exists($value, $references)) {
|
|
throw new ParseException(sprintf('Reference "%s" does not exist.', $value));
|
|
}
|
|
|
|
return $references[$value];
|
|
}
|
|
|
|
switch (true) {
|
|
case 'null' === $scalarLower:
|
|
case '' === $scalar:
|
|
case '~' === $scalar:
|
|
return;
|
|
case 'true' === $scalarLower:
|
|
return true;
|
|
case 'false' === $scalarLower:
|
|
return false;
|
|
// Optimise for returning strings.
|
|
case $scalar[0] === '+' || $scalar[0] === '-' || $scalar[0] === '.' || $scalar[0] === '!' || is_numeric($scalar[0]):
|
|
switch (true) {
|
|
case 0 === strpos($scalar, '!str'):
|
|
return (string) substr($scalar, 5);
|
|
case 0 === strpos($scalar, '! '):
|
|
return (int) self::parseScalar(substr($scalar, 2), $flags);
|
|
case 0 === strpos($scalar, '!php/object:'):
|
|
if (self::$objectSupport) {
|
|
return unserialize(substr($scalar, 12));
|
|
}
|
|
|
|
if (self::$exceptionOnInvalidType) {
|
|
throw new ParseException('Object support when parsing a YAML file has been disabled.');
|
|
}
|
|
|
|
return;
|
|
case 0 === strpos($scalar, '!!php/object:'):
|
|
if (self::$objectSupport) {
|
|
@trigger_error('The !!php/object tag to indicate dumped PHP objects is deprecated since version 3.1 and will be removed in 4.0. Use the !php/object tag instead.', E_USER_DEPRECATED);
|
|
|
|
return unserialize(substr($scalar, 13));
|
|
}
|
|
|
|
if (self::$exceptionOnInvalidType) {
|
|
throw new ParseException('Object support when parsing a YAML file has been disabled.');
|
|
}
|
|
|
|
return;
|
|
case 0 === strpos($scalar, '!php/const:'):
|
|
if (self::$constantSupport) {
|
|
if (defined($const = substr($scalar, 11))) {
|
|
return constant($const);
|
|
}
|
|
|
|
throw new ParseException(sprintf('The constant "%s" is not defined.', $const));
|
|
}
|
|
if (self::$exceptionOnInvalidType) {
|
|
throw new ParseException(sprintf('The string "%s" could not be parsed as a constant. Have you forgotten to pass the "Yaml::PARSE_CONSTANT" flag to the parser?', $scalar));
|
|
}
|
|
|
|
return;
|
|
case 0 === strpos($scalar, '!!float '):
|
|
return (float) substr($scalar, 8);
|
|
case preg_match('{^[+-]?[0-9][0-9_]*$}', $scalar):
|
|
$scalar = str_replace('_', '', (string) $scalar);
|
|
// omitting the break / return as integers are handled in the next case
|
|
case ctype_digit($scalar):
|
|
$raw = $scalar;
|
|
$cast = (int) $scalar;
|
|
|
|
return '0' == $scalar[0] ? octdec($scalar) : (((string) $raw == (string) $cast) ? $cast : $raw);
|
|
case '-' === $scalar[0] && ctype_digit(substr($scalar, 1)):
|
|
$raw = $scalar;
|
|
$cast = (int) $scalar;
|
|
|
|
return '0' == $scalar[1] ? octdec($scalar) : (((string) $raw === (string) $cast) ? $cast : $raw);
|
|
case is_numeric($scalar):
|
|
case preg_match(self::getHexRegex(), $scalar):
|
|
$scalar = str_replace('_', '', $scalar);
|
|
|
|
return '0x' === $scalar[0].$scalar[1] ? hexdec($scalar) : (float) $scalar;
|
|
case '.inf' === $scalarLower:
|
|
case '.nan' === $scalarLower:
|
|
return -log(0);
|
|
case '-.inf' === $scalarLower:
|
|
return log(0);
|
|
case 0 === strpos($scalar, '!!binary '):
|
|
return self::evaluateBinaryScalar(substr($scalar, 9));
|
|
case preg_match('/^(-|\+)?[0-9][0-9,]*(\.[0-9_]+)?$/', $scalar):
|
|
case preg_match('/^(-|\+)?[0-9][0-9_]*(\.[0-9_]+)?$/', $scalar):
|
|
if (false !== strpos($scalar, ',')) {
|
|
@trigger_error('Using the comma as a group separator for floats is deprecated since version 3.2 and will be removed in 4.0.', E_USER_DEPRECATED);
|
|
}
|
|
|
|
return (float) str_replace(array(',', '_'), '', $scalar);
|
|
case preg_match(self::getTimestampRegex(), $scalar):
|
|
if (Yaml::PARSE_DATETIME & $flags) {
|
|
// When no timezone is provided in the parsed date, YAML spec says we must assume UTC.
|
|
return new \DateTime($scalar, new \DateTimeZone('UTC'));
|
|
}
|
|
|
|
$timeZone = date_default_timezone_get();
|
|
date_default_timezone_set('UTC');
|
|
$time = strtotime($scalar);
|
|
date_default_timezone_set($timeZone);
|
|
|
|
return $time;
|
|
}
|
|
default:
|
|
return (string) $scalar;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string $scalar
|
|
*
|
|
* @return string
|
|
*
|
|
* @internal
|
|
*/
|
|
public static function evaluateBinaryScalar($scalar)
|
|
{
|
|
$parsedBinaryData = self::parseScalar(preg_replace('/\s/', '', $scalar));
|
|
|
|
if (0 !== (strlen($parsedBinaryData) % 4)) {
|
|
throw new ParseException(sprintf('The normalized base64 encoded data (data without whitespace characters) length must be a multiple of four (%d bytes given).', strlen($parsedBinaryData)));
|
|
}
|
|
|
|
if (!preg_match('#^[A-Z0-9+/]+={0,2}$#i', $parsedBinaryData)) {
|
|
throw new ParseException(sprintf('The base64 encoded data (%s) contains invalid characters.', $parsedBinaryData));
|
|
}
|
|
|
|
return base64_decode($parsedBinaryData, true);
|
|
}
|
|
|
|
private static function isBinaryString($value)
|
|
{
|
|
return !preg_match('//u', $value) || preg_match('/[^\x00\x07-\x0d\x1B\x20-\xff]/', $value);
|
|
}
|
|
|
|
/**
|
|
* Gets a regex that matches a YAML date.
|
|
*
|
|
* @return string The regular expression
|
|
*
|
|
* @see http://www.yaml.org/spec/1.2/spec.html#id2761573
|
|
*/
|
|
private static function getTimestampRegex()
|
|
{
|
|
return <<<EOF
|
|
~^
|
|
(?P<year>[0-9][0-9][0-9][0-9])
|
|
-(?P<month>[0-9][0-9]?)
|
|
-(?P<day>[0-9][0-9]?)
|
|
(?:(?:[Tt]|[ \t]+)
|
|
(?P<hour>[0-9][0-9]?)
|
|
:(?P<minute>[0-9][0-9])
|
|
:(?P<second>[0-9][0-9])
|
|
(?:\.(?P<fraction>[0-9]*))?
|
|
(?:[ \t]*(?P<tz>Z|(?P<tz_sign>[-+])(?P<tz_hour>[0-9][0-9]?)
|
|
(?::(?P<tz_minute>[0-9][0-9]))?))?)?
|
|
$~x
|
|
EOF;
|
|
}
|
|
|
|
/**
|
|
* Gets a regex that matches a YAML number in hexadecimal notation.
|
|
*
|
|
* @return string
|
|
*/
|
|
private static function getHexRegex()
|
|
{
|
|
return '~^0x[0-9a-f_]++$~i';
|
|
}
|
|
}
|