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Improvement of bot/spider detection

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Sven Wappler 2018-01-01 05:44:09 +01:00
parent ddffe669d5
commit 3d15ac54e3
9 changed files with 3812 additions and 3 deletions
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263
Classes/DeviceDetector/DeviceDetector.php Normal file
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<?php
/**
* Device Detector - The Universal Device Detection library for parsing User Agents
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/lgpl.html LGPL v3 or later
*/
namespace WapplerSystems\ABTest2\DeviceDetector;
use TYPO3\CMS\Core\Utility\DebugUtility;
use WapplerSystems\ABTest2\DeviceDetector\Parser\Bot;
use WapplerSystems\ABTest2\DeviceDetector\Yaml\Parser AS YamlParser;
use WapplerSystems\ABTest2\DeviceDetector\Yaml\Spyc;
/**
* Class DeviceDetector
*
* @package DeviceDetector
*/
class DeviceDetector
{
/**
* Constant used as value for unknown browser / os
*/
const UNKNOWN = "UNK";
/**
* Holds the useragent that should be parsed
* @var string
*/
protected $userAgent;
/**
* Holds bot information if parsing the UA results in a bot
* (All other information attributes will stay empty in that case)
*
* If $discardBotInformation is set to true, this property will be set to
* true if parsed UA is identified as bot, additional information will be not available
*
* If $skipBotDetection is set to true, bot detection will not be performed and isBot will
* always be false
*
* @var array|boolean
*/
protected $bot = null;
/**
* @var bool
*/
protected $discardBotInformation = false;
/**
* @var bool
*/
protected $skipBotDetection = false;
/**
* Holds the parser class used for parsing yml-Files
* @var \WapplerSystems\ABTest2\DeviceDetector\Yaml\Parser
*/
protected $yamlParser = null;
/**
* @var bool
*/
private $parsed = false;
/**
* Constructor
*
* @param string $userAgent UA to parse
*/
public function __construct($userAgent = '')
{
if ($userAgent != '') {
$this->setUserAgent($userAgent);
}
}
/**
* Sets the useragent to be parsed
*
* @param string $userAgent
*/
public function setUserAgent($userAgent)
{
if ($this->userAgent != $userAgent) {
$this->reset();
}
$this->userAgent = $userAgent;
}
protected function reset()
{
$this->bot = null;
$this->parsed = false;
}
/**
* Sets whether to discard additional bot information
* If information is discarded it's only possible check whether UA was detected as bot or not.
* (Discarding information speeds up the detection a bit)
*
* @param bool $discard
*/
public function discardBotInformation($discard = true)
{
$this->discardBotInformation = $discard;
}
/**
* Sets whether to skip bot detection.
* It is needed if we want bots to be processed as a simple clients. So we can detect if it is mobile client,
* or desktop, or enything else. By default all this information is not retrieved for the bots.
*
* @param bool $skip
*/
public function skipBotDetection($skip = true)
{
$this->skipBotDetection = $skip;
}
/**
* Returns if the parsed UA was identified as a Bot
*
* @see bots.yml for a list of detected bots
*
* @return bool
*/
public function isBot()
{
return !empty($this->bot);
}
/**
* Returns the user agent that is set to be parsed
*
* @return string
*/
public function getUserAgent()
{
return $this->userAgent;
}
/**
* Returns the bot extracted from the parsed UA
*
* @return array
*/
public function getBot()
{
return $this->bot;
}
/**
* Returns true, if userAgent was already parsed with parse()
*
* @return bool
*/
public function isParsed()
{
return $this->parsed;
}
/**
* Triggers the parsing of the current user agent
* @throws \Exception
*/
public function parse()
{
if ($this->isParsed()) {
return;
}
$this->parsed = true;
// skip parsing for empty useragents or those not containing any letter
if (empty($this->userAgent) || !preg_match('/([a-z])/i', $this->userAgent)) {
return;
}
$this->parseBot();
if ($this->isBot()) {
return;
}
}
/**
* Parses the UA for bot information using the Bot parser
* @throws \Exception
* @return void
*/
protected function parseBot()
{
if ($this->skipBotDetection) {
$this->bot = false;
return;
}
$botParser = new Bot();
$botParser->setUserAgent($this->getUserAgent());
$botParser->setYamlParser($this->getYamlParser());
if ($this->discardBotInformation) {
$botParser->discardDetails();
}
$this->bot = $botParser->parse();
}
protected function matchUserAgent($regex)
{
$regex = '/(?:^|[^A-Z_-])(?:' . str_replace('/', '\/', $regex) . ')/i';
if (preg_match($regex, $this->userAgent, $matches)) {
return $matches;
}
return false;
}
/**
* Sets the Yaml Parser class
*
* @param YamlParser
* @throws \Exception
*/
public function setYamlParser($yamlParser)
{
if ($yamlParser instanceof YamlParser) {
$this->yamlParser = $yamlParser;
return;
}
throw new \Exception('Yaml Parser not supported');
}
/**
* Returns Yaml Parser object
*
* @return YamlParser
*/
public function getYamlParser()
{
if (!empty($this->yamlParser)) {
return $this->yamlParser;
}
return new Spyc();
}
}

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<?php
/**
* Device Detector - The Universal Device Detection library for parsing User Agents
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/lgpl.html LGPL v3 or later
*/
namespace WapplerSystems\ABTest2\DeviceDetector\Parser;
/**
* Class Bot
*
* Parses a user agent for bot information
*
* Detected bots are defined in regexes/bots.yml
*
* @package DeviceDetector\Parser
*/
class Bot extends ParserAbstract
{
protected $fixtureFile = 'bots.yml';
protected $parserName = 'bot';
protected $discardDetails = false;
/**
* Enables information discarding
*/
public function discardDetails()
{
$this->discardDetails = true;
}
/**
* Parses the current UA and checks whether it contains bot information
*
* @see bots.yml for list of detected bots
*
* Step 1: Build a big regex containing all regexes and match UA against it
* -> If no matches found: return
* -> Otherwise:
* Step 2: Walk through the list of regexes in bots.yml and try to match every one
* -> Return the matched data
*
* If $discardDetails is set to TRUE, the Step 2 will be skipped
* $bot will be set to TRUE instead
*
* NOTE: Doing the big match before matching every single regex speeds up the detection
*/
public function parse()
{
$result = null;
if ($this->preMatchOverall()) {
foreach ($this->getRegexes() as $regex) {
$matches = $this->matchUserAgent($regex['regex']);
if ($matches) {
if ($this->discardDetails) {
$result = true;
break;
}
unset($regex['regex']);
$result = $regex;
break;
}
}
}
return $result;
}
}

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Classes/DeviceDetector/Parser/ParserAbstract.php Normal file
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<?php
/**
* Device Detector - The Universal Device Detection library for parsing User Agents
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/lgpl.html LGPL v3 or later
*/
namespace WapplerSystems\ABTest2\DeviceDetector\Parser;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use WapplerSystems\ABTest2\DeviceDetector\Yaml\Parser;
/**
* Class ParserAbstract
*
* @package DeviceDetector\Parser
*/
abstract class ParserAbstract
{
/**
* Holds the path to the yml file containing regexes
* @var string
*/
protected $fixtureFile;
/**
* Holds the internal name of the parser
* Used for caching
* @var string
*/
protected $parserName;
/**
* Holds the user agent the should be parsed
* @var string
*/
protected $userAgent;
/**
* Holds an array with method that should be available global
* @var array
*/
protected $globalMethods;
/**
* Holds an array with regexes to parse, if already loaded
* @var array
*/
protected $regexList;
/**
* Indicates how deep versioning will be detected
* if $maxMinorParts is 0 only the major version will be returned
* @var int
*/
protected static $maxMinorParts = 1;
/**
* Versioning constant used to set max versioning to major version only
* Version examples are: 3, 5, 6, 200, 123, ...
*/
const VERSION_TRUNCATION_MAJOR = 0;
/**
* Versioning constant used to set max versioning to minor version
* Version examples are: 3.4, 5.6, 6.234, 0.200, 1.23, ...
*/
const VERSION_TRUNCATION_MINOR = 1;
/**
* Versioning constant used to set max versioning to path level
* Version examples are: 3.4.0, 5.6.344, 6.234.2, 0.200.3, 1.2.3, ...
*/
const VERSION_TRUNCATION_PATCH = 2;
/**
* Versioning constant used to set versioning to build number
* Version examples are: 3.4.0.12, 5.6.334.0, 6.234.2.3, 0.200.3.1, 1.2.3.0, ...
*/
const VERSION_TRUNCATION_BUILD = 3;
/**
* Versioning constant used to set versioning to unlimited (no truncation)
*/
const VERSION_TRUNCATION_NONE = null;
/**
* @var Parser
*/
protected $yamlParser;
abstract public function parse();
public function __construct($ua='')
{
$this->setUserAgent($ua);
}
/**
* Set how DeviceDetector should return versions
* @param int|null $type Any of the VERSION_TRUNCATION_* constants
*/
public static function setVersionTruncation($type)
{
if (in_array($type, array(self::VERSION_TRUNCATION_BUILD,
self::VERSION_TRUNCATION_NONE,
self::VERSION_TRUNCATION_MAJOR,
self::VERSION_TRUNCATION_MINOR,
self::VERSION_TRUNCATION_PATCH))) {
self::$maxMinorParts = $type;
}
}
/**
* Sets the user agent to parse
*
* @param string $ua user agent
*/
public function setUserAgent($ua)
{
$this->userAgent = $ua;
}
/**
* Returns the internal name of the parser
*
* @return string
*/
public function getName()
{
return $this->parserName;
}
/**
* Returns the result of the parsed yml file defined in $fixtureFile
*
* @return array
*/
protected function getRegexes()
{
if (empty($this->regexList)) {
$this->regexList = $this->getYamlParser()->parse(
file_get_contents(GeneralUtility::getFileAbsFileName('EXT:abtest2/Configuration/YAML/'.$this->fixtureFile))
);
}
return $this->regexList;
}
/**
* @return string
*/
protected function getRegexesDirectory()
{
return dirname(__DIR__);
}
/**
* Matches the useragent against the given regex
*
* @param $regex
* @return array|bool
*/
protected function matchUserAgent($regex)
{
// only match if useragent begins with given regex or there is no letter before it
$regex = '/(?:^|[^A-Z0-9\-_]|[^A-Z0-9\-]_|sprd-)(?:' . str_replace('/', '\/', $regex) . ')/i';
if (preg_match($regex, $this->userAgent, $matches)) {
return $matches;
}
return false;
}
/**
* @param string $item
* @param array $matches
* @return string type
*/
protected function buildByMatch($item, $matches)
{
for ($nb=1;$nb<=3;$nb++) {
if (strpos($item, '$' . $nb) === false) {
continue;
}
$replace = isset($matches[$nb]) ? $matches[$nb] : '';
$item = trim(str_replace('$' . $nb, $replace, $item));
}
return $item;
}
/**
* Builds the version with the given $versionString and $matches
*
* Example:
* $versionString = 'v$2'
* $matches = array('version_1_0_1', '1_0_1')
* return value would be v1.0.1
*
* @param $versionString
* @param $matches
* @return mixed|string
*/
protected function buildVersion($versionString, $matches)
{
$versionString = $this->buildByMatch($versionString, $matches);
$versionString = str_replace('_', '.', $versionString);
if (null !== self::$maxMinorParts && substr_count($versionString, '.') > self::$maxMinorParts) {
$versionParts = explode('.', $versionString);
$versionParts = array_slice($versionParts, 0, 1+self::$maxMinorParts);
$versionString = implode('.', $versionParts);
}
return trim($versionString, ' .');
}
/**
* Tests the useragent against a combination of all regexes
*
* All regexes returned by getRegexes() will be reversed and concated with '|'
* Afterwards the big regex will be tested against the user agent
*
* Method can be used to speed up detections by making a big check before doing checks for every single regex
*
* @return bool
*/
protected function preMatchOverall()
{
$regexes = $this->getRegexes();
static $overAllMatch;
if (empty($overAllMatch)) {
// reverse all regexes, so we have the generic one first, which already matches most patterns
$overAllMatch = array_reduce(array_reverse($regexes), function ($val1, $val2) {
if (!empty($val1)) {
return $val1.'|'.$val2['regex'];
} else {
return $val2['regex'];
}
});
}
return $this->matchUserAgent($overAllMatch);
}
/**
* Sets the YamlParser class
*
* @param Parser
*/
public function setYamlParser($yamlParser)
{
$this->yamlParser = $yamlParser;
}
/**
* Returns Parser object
*
* @return Parser
*/
public function getYamlParser()
{
return $this->yamlParser;
}
}

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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace WapplerSystems\ABTest2\DeviceDetector\Yaml;
use Symfony\Component\Yaml\Exception\DumpException;
/**
* Inline implements a YAML parser/dumper for the YAML inline syntax.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class Inline
{
const REGEX_QUOTED_STRING = '(?:"([^"\\\\]*(?:\\\\.[^"\\\\]*)*)"|\'([^\']*(?:\'\'[^\']*)*)\')';
private static $exceptionOnInvalidType = false;
private static $objectSupport = false;
private static $objectForMap = false;
/**
* Converts a YAML string to a PHP array.
*
* @param string $value A YAML string
* @param bool $exceptionOnInvalidType true if an exception must be thrown on invalid types (a PHP resource or object), false otherwise
* @param bool $objectSupport true if object support is enabled, false otherwise
* @param bool $objectForMap true if maps should return a stdClass instead of array()
* @param array $references Mapping of variable names to values
*
* @return array A PHP array representing the YAML string
*
* @throws ParseException
*/
public static function parse($value, $exceptionOnInvalidType = false, $objectSupport = false, $objectForMap = false, $references = array())
{
self::$exceptionOnInvalidType = $exceptionOnInvalidType;
self::$objectSupport = $objectSupport;
self::$objectForMap = $objectForMap;
$value = trim($value);
if ('' === $value) {
return '';
}
if (2 /* MB_OVERLOAD_STRING */ & (int) ini_get('mbstring.func_overload')) {
$mbEncoding = mb_internal_encoding();
mb_internal_encoding('ASCII');
}
$i = 0;
switch ($value[0]) {
case '[':
$result = self::parseSequence($value, $i, $references);
++$i;
break;
case '{':
$result = self::parseMapping($value, $i, $references);
++$i;
break;
default:
$result = self::parseScalar($value, null, array('"', "'"), $i, true, $references);
}
// some comments are allowed at the end
if (preg_replace('/\s+#.*$/A', '', substr($value, $i))) {
throw new ParseException(sprintf('Unexpected characters near "%s".', substr($value, $i)));
}
if (isset($mbEncoding)) {
mb_internal_encoding($mbEncoding);
}
return $result;
}
/**
* Dumps a given PHP variable to a YAML string.
*
* @param mixed $value The PHP variable to convert
* @param bool $exceptionOnInvalidType true if an exception must be thrown on invalid types (a PHP resource or object), false otherwise
* @param bool $objectSupport true if object support is enabled, false otherwise
*
* @return string The YAML string representing the PHP array
*
* @throws DumpException When trying to dump PHP resource
*/
public static function dump($value, $exceptionOnInvalidType = false, $objectSupport = false)
{
switch (true) {
case is_resource($value):
if ($exceptionOnInvalidType) {
throw new DumpException(sprintf('Unable to dump PHP resources in a YAML file ("%s").', get_resource_type($value)));
}
return 'null';
case is_object($value):
if ($objectSupport) {
return '!php/object:'.serialize($value);
}
if ($exceptionOnInvalidType) {
throw new DumpException('Object support when dumping a YAML file has been disabled.');
}
return 'null';
case is_array($value):
return self::dumpArray($value, $exceptionOnInvalidType, $objectSupport);
case null === $value:
return 'null';
case true === $value:
return 'true';
case false === $value:
return 'false';
case ctype_digit($value):
return is_string($value) ? "'$value'" : (int) $value;
case is_numeric($value):
$locale = setlocale(LC_NUMERIC, 0);
if (false !== $locale) {
setlocale(LC_NUMERIC, 'C');
}
if (is_float($value)) {
$repr = (string) $value;
if (is_infinite($value)) {
$repr = str_ireplace('INF', '.Inf', $repr);
} elseif (floor($value) == $value && $repr == $value) {
// Preserve float data type since storing a whole number will result in integer value.
$repr = '!!float '.$repr;
}
} else {
$repr = is_string($value) ? "'$value'" : (string) $value;
}
if (false !== $locale) {
setlocale(LC_NUMERIC, $locale);
}
return $repr;
case '' == $value:
return "''";
case Escaper::requiresDoubleQuoting($value):
return Escaper::escapeWithDoubleQuotes($value);
case Escaper::requiresSingleQuoting($value):
case preg_match(self::getHexRegex(), $value):
case preg_match(self::getTimestampRegex(), $value):
return Escaper::escapeWithSingleQuotes($value);
default:
return $value;
}
}
/**
* Dumps a PHP array to a YAML string.
*
* @param array $value The PHP array to dump
* @param bool $exceptionOnInvalidType true if an exception must be thrown on invalid types (a PHP resource or object), false otherwise
* @param bool $objectSupport true if object support is enabled, false otherwise
*
* @return string The YAML string representing the PHP array
*/
private static function dumpArray($value, $exceptionOnInvalidType, $objectSupport)
{
// array
$keys = array_keys($value);
$keysCount = count($keys);
if ((1 === $keysCount && '0' == $keys[0])
|| ($keysCount > 1 && array_reduce($keys, function ($v, $w) { return (int) $v + $w; }, 0) === $keysCount * ($keysCount - 1) / 2)
) {
$output = array();
foreach ($value as $val) {
$output[] = self::dump($val, $exceptionOnInvalidType, $objectSupport);
}
return sprintf('[%s]', implode(', ', $output));
}
// mapping
$output = array();
foreach ($value as $key => $val) {
$output[] = sprintf('%s: %s', self::dump($key, $exceptionOnInvalidType, $objectSupport), self::dump($val, $exceptionOnInvalidType, $objectSupport));
}
return sprintf('{ %s }', implode(', ', $output));
}
/**
* Parses a scalar to a YAML string.
*
* @param string $scalar
* @param string $delimiters
* @param array $stringDelimiters
* @param int &$i
* @param bool $evaluate
* @param array $references
*
* @return string A YAML string
*
* @throws ParseException When malformed inline YAML string is parsed
*
* @internal
*/
public static function parseScalar($scalar, $delimiters = null, $stringDelimiters = array('"', "'"), &$i = 0, $evaluate = true, $references = array())
{
if (in_array($scalar[$i], $stringDelimiters)) {
// quoted scalar
$output = self::parseQuotedScalar($scalar, $i);
if (null !== $delimiters) {
$tmp = ltrim(substr($scalar, $i), ' ');
if (!in_array($tmp[0], $delimiters)) {
throw new ParseException(sprintf('Unexpected characters (%s).', substr($scalar, $i)));
}
}
} else {
// "normal" string
if (!$delimiters) {
$output = substr($scalar, $i);
$i += strlen($output);
// remove comments
if (preg_match('/[ \t]+#/', $output, $match, PREG_OFFSET_CAPTURE)) {
$output = substr($output, 0, $match[0][1]);
}
} elseif (preg_match('/^(.+?)('.implode('|', $delimiters).')/', substr($scalar, $i), $match)) {
$output = $match[1];
$i += strlen($output);
} else {
throw new ParseException(sprintf('Malformed inline YAML string (%s).', $scalar));
}
// a non-quoted string cannot start with @ or ` (reserved) nor with a scalar indicator (| or >)
if ($output && ('@' === $output[0] || '`' === $output[0] || '|' === $output[0] || '>' === $output[0])) {
throw new ParseException(sprintf('The reserved indicator "%s" cannot start a plain scalar; you need to quote the scalar.', $output[0]));
}
if ($evaluate) {
$output = self::evaluateScalar($output, $references);
}
}
return $output;
}
/**
* Parses a quoted scalar to YAML.
*
* @param string $scalar
* @param int &$i
*
* @return string A YAML string
*
* @throws ParseException When malformed inline YAML string is parsed
*/
private static function parseQuotedScalar($scalar, &$i)
{
if (!preg_match('/'.self::REGEX_QUOTED_STRING.'/Au', substr($scalar, $i), $match)) {
throw new ParseException(sprintf('Malformed inline YAML string (%s).', substr($scalar, $i)));
}
$output = substr($match[0], 1, strlen($match[0]) - 2);
$unescaper = new Unescaper();
if ('"' == $scalar[$i]) {
$output = $unescaper->unescapeDoubleQuotedString($output);
} else {
$output = $unescaper->unescapeSingleQuotedString($output);
}
$i += strlen($match[0]);
return $output;
}
/**
* Parses a sequence to a YAML string.
*
* @param string $sequence
* @param int &$i
* @param array $references
*
* @return string A YAML string
*
* @throws ParseException When malformed inline YAML string is parsed
*/
private static function parseSequence($sequence, &$i = 0, $references = array())
{
$output = array();
$len = strlen($sequence);
++$i;
// [foo, bar, ...]
while ($i < $len) {
switch ($sequence[$i]) {
case '[':
// nested sequence
$output[] = self::parseSequence($sequence, $i, $references);
break;
case '{':
// nested mapping
$output[] = self::parseMapping($sequence, $i, $references);
break;
case ']':
return $output;
case ',':
case ' ':
break;
default:
$isQuoted = in_array($sequence[$i], array('"', "'"));
$value = self::parseScalar($sequence, array(',', ']'), array('"', "'"), $i, true, $references);
// the value can be an array if a reference has been resolved to an array var
if (!is_array($value) && !$isQuoted && false !== strpos($value, ': ')) {
// embedded mapping?
try {
$pos = 0;
$value = self::parseMapping('{'.$value.'}', $pos, $references);
} catch (\InvalidArgumentException $e) {
// no, it's not
}
}
$output[] = $value;
--$i;
}
++$i;
}
throw new ParseException(sprintf('Malformed inline YAML string %s', $sequence));
}
/**
* Parses a mapping to a YAML string.
*
* @param string $mapping
* @param int &$i
* @param array $references
*
* @return string A YAML string
*
* @throws ParseException When malformed inline YAML string is parsed
*/
private static function parseMapping($mapping, &$i = 0, $references = array())
{
$output = array();
$len = strlen($mapping);
++$i;
// {foo: bar, bar:foo, ...}
while ($i < $len) {
switch ($mapping[$i]) {
case ' ':
case ',':
++$i;
continue 2;
case '}':
if (self::$objectForMap) {
return (object) $output;
}
return $output;
}
// key
$key = self::parseScalar($mapping, array(':', ' '), array('"', "'"), $i, false);
// value
$done = false;
while ($i < $len) {
switch ($mapping[$i]) {
case '[':
// nested sequence
$value = self::parseSequence($mapping, $i, $references);
// Spec: Keys MUST be unique; first one wins.
// Parser cannot abort this mapping earlier, since lines
// are processed sequentially.
if (!isset($output[$key])) {
$output[$key] = $value;
}
$done = true;
break;
case '{':
// nested mapping
$value = self::parseMapping($mapping, $i, $references);
// Spec: Keys MUST be unique; first one wins.
// Parser cannot abort this mapping earlier, since lines
// are processed sequentially.
if (!isset($output[$key])) {
$output[$key] = $value;
}
$done = true;
break;
case ':':
case ' ':
break;
default:
$value = self::parseScalar($mapping, array(',', '}'), array('"', "'"), $i, true, $references);
// Spec: Keys MUST be unique; first one wins.
// Parser cannot abort this mapping earlier, since lines
// are processed sequentially.
if (!isset($output[$key])) {
$output[$key] = $value;
}
$done = true;
--$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 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, $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));
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) {
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($scalar, '!!float '):
return (float) substr($scalar, 8);
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):
return '0x' === $scalar[0].$scalar[1] ? hexdec($scalar) : (float) $scalar;
case '.inf' === $scalarLower:
case '.nan' === $scalarLower:
return -log(0);
case '-.inf' === $scalarLower:
return log(0);
case preg_match('/^(-|\+)?[0-9,]+(\.[0-9]+)?$/', $scalar):
return (float) str_replace(',', '', $scalar);
case preg_match(self::getTimestampRegex(), $scalar):
$timeZone = date_default_timezone_get();
date_default_timezone_set('UTC');
$time = strtotime($scalar);
date_default_timezone_set($timeZone);
return $time;
}
default:
return (string) $scalar;
}
}
/**
* 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';
}
}

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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace WapplerSystems\ABTest2\DeviceDetector\Yaml;
/**
* Exception class thrown when an error occurs during parsing.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class ParseException extends \RuntimeException
{
private $parsedFile;
private $parsedLine;
private $snippet;
private $rawMessage;
/**
* Constructor.
*
* @param string $message The error message
* @param int $parsedLine The line where the error occurred
* @param int $snippet The snippet of code near the problem
* @param string $parsedFile The file name where the error occurred
* @param \Exception $previous The previous exception
*/
public function __construct($message, $parsedLine = -1, $snippet = null, $parsedFile = null, \Exception $previous = null)
{
$this->parsedFile = $parsedFile;
$this->parsedLine = $parsedLine;
$this->snippet = $snippet;
$this->rawMessage = $message;
$this->updateRepr();
parent::__construct($this->message, 0, $previous);
}
/**
* Gets the snippet of code near the error.
*
* @return string The snippet of code
*/
public function getSnippet()
{
return $this->snippet;
}
/**
* Sets the snippet of code near the error.
*
* @param string $snippet The code snippet
*/
public function setSnippet($snippet)
{
$this->snippet = $snippet;
$this->updateRepr();
}
/**
* Gets the filename where the error occurred.
*
* This method returns null if a string is parsed.
*
* @return string The filename
*/
public function getParsedFile()
{
return $this->parsedFile;
}
/**
* Sets the filename where the error occurred.
*
* @param string $parsedFile The filename
*/
public function setParsedFile($parsedFile)
{
$this->parsedFile = $parsedFile;
$this->updateRepr();
}
/**
* Gets the line where the error occurred.
*
* @return int The file line
*/
public function getParsedLine()
{
return $this->parsedLine;
}
/**
* Sets the line where the error occurred.
*
* @param int $parsedLine The file line
*/
public function setParsedLine($parsedLine)
{
$this->parsedLine = $parsedLine;
$this->updateRepr();
}
private function updateRepr()
{
$this->message = $this->rawMessage;
$dot = false;
if ('.' === substr($this->message, -1)) {
$this->message = substr($this->message, 0, -1);
$dot = true;
}
if (null !== $this->parsedFile) {
$this->message .= sprintf(' in %s', json_encode($this->parsedFile, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE));
}
if ($this->parsedLine >= 0) {
$this->message .= sprintf(' at line %d', $this->parsedLine);
}
if ($this->snippet) {
$this->message .= sprintf(' (near "%s")', $this->snippet);
}
if ($dot) {
$this->message .= '.';
}
}
}

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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace WapplerSystems\ABTest2\DeviceDetector\Yaml;
/**
* Parser parses YAML strings to convert them to PHP arrays.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class Parser
{
const BLOCK_SCALAR_HEADER_PATTERN = '(?P<separator>\||>)(?P<modifiers>\+|\-|\d+|\+\d+|\-\d+|\d+\+|\d+\-)?(?P<comments> +#.*)?';
private $offset = 0;
private $lines = array();
private $currentLineNb = -1;
private $currentLine = '';
private $refs = array();
/**
* Constructor.
*
* @param int $offset The offset of YAML document (used for line numbers in error messages)
*/
public function __construct($offset = 0)
{
$this->offset = $offset;
}
/**
* Parses a YAML string to a PHP value.
*
* @param string $value A YAML string
* @param bool $exceptionOnInvalidType true if an exception must be thrown on invalid types (a PHP resource or object), false otherwise
* @param bool $objectSupport true if object support is enabled, false otherwise
* @param bool $objectForMap true if maps should return a stdClass instead of array()
*
* @return mixed A PHP value
*
* @throws ParseException If the YAML is not valid
*/
public function parse($value, $exceptionOnInvalidType = false, $objectSupport = false, $objectForMap = false)
{
if (!preg_match('//u', $value)) {
throw new ParseException('The YAML value does not appear to be valid UTF-8.');
}
$this->currentLineNb = -1;
$this->currentLine = '';
$value = $this->cleanup($value);
$this->lines = explode("\n", $value);
if (2 /* MB_OVERLOAD_STRING */ & (int) ini_get('mbstring.func_overload')) {
$mbEncoding = mb_internal_encoding();
mb_internal_encoding('UTF-8');
}
$data = array();
$context = null;
$allowOverwrite = false;
while ($this->moveToNextLine()) {
if ($this->isCurrentLineEmpty()) {
continue;
}
// tab?
if ("\t" === $this->currentLine[0]) {
throw new ParseException('A YAML file cannot contain tabs as indentation.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
}
$isRef = $mergeNode = false;
if (preg_match('#^\-((?P<leadspaces>\s+)(?P<value>.+?))?\s*$#u', $this->currentLine, $values)) {
if ($context && 'mapping' == $context) {
throw new ParseException('You cannot define a sequence item when in a mapping');
}
$context = 'sequence';
if (isset($values['value']) && preg_match('#^&(?P<ref>[^ ]+) *(?P<value>.*)#u', $values['value'], $matches)) {
$isRef = $matches['ref'];
$values['value'] = $matches['value'];
}
// array
if (!isset($values['value']) || '' == trim($values['value'], ' ') || 0 === strpos(ltrim($values['value'], ' '), '#')) {
$c = $this->getRealCurrentLineNb() + 1;
$parser = new self($c);
$parser->refs = &$this->refs;
$data[] = $parser->parse($this->getNextEmbedBlock(null, true), $exceptionOnInvalidType, $objectSupport, $objectForMap);
} else {
if (isset($values['leadspaces'])
&& preg_match('#^(?P<key>'.Inline::REGEX_QUOTED_STRING.'|[^ \'"\{\[].*?) *\:(\s+(?P<value>.+?))?\s*$#u', $values['value'], $matches)
) {
// this is a compact notation element, add to next block and parse
$c = $this->getRealCurrentLineNb();
$parser = new self($c);
$parser->refs = &$this->refs;
$block = $values['value'];
if ($this->isNextLineIndented()) {
$block .= "\n".$this->getNextEmbedBlock($this->getCurrentLineIndentation() + strlen($values['leadspaces']) + 1);
}
$data[] = $parser->parse($block, $exceptionOnInvalidType, $objectSupport, $objectForMap);
} else {
$data[] = $this->parseValue($values['value'], $exceptionOnInvalidType, $objectSupport, $objectForMap, $context);
}
}
if ($isRef) {
$this->refs[$isRef] = end($data);
}
} elseif (preg_match('#^(?P<key>'.Inline::REGEX_QUOTED_STRING.'|[^ \'"\[\{].*?) *\:(\s+(?P<value>.+?))?\s*$#u', $this->currentLine, $values) && (false === strpos($values['key'], ' #') || in_array($values['key'][0], array('"', "'")))) {
if ($context && 'sequence' == $context) {
throw new ParseException('You cannot define a mapping item when in a sequence');
}
$context = 'mapping';
// force correct settings
Inline::parse(null, $exceptionOnInvalidType, $objectSupport, $objectForMap, $this->refs);
try {
$key = Inline::parseScalar($values['key']);
} catch (ParseException $e) {
$e->setParsedLine($this->getRealCurrentLineNb() + 1);
$e->setSnippet($this->currentLine);
throw $e;
}
// Convert float keys to strings, to avoid being converted to integers by PHP
if (is_float($key)) {
$key = (string) $key;
}
if ('<<' === $key) {
$mergeNode = true;
$allowOverwrite = true;
if (isset($values['value']) && 0 === strpos($values['value'], '*')) {
$refName = substr($values['value'], 1);
if (!array_key_exists($refName, $this->refs)) {
throw new ParseException(sprintf('Reference "%s" does not exist.', $refName), $this->getRealCurrentLineNb() + 1, $this->currentLine);
}
$refValue = $this->refs[$refName];
if (!is_array($refValue)) {
throw new ParseException('YAML merge keys used with a scalar value instead of an array.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
}
foreach ($refValue as $key => $value) {
if (!isset($data[$key])) {
$data[$key] = $value;
}
}
} else {
if (isset($values['value']) && $values['value'] !== '') {
$value = $values['value'];
} else {
$value = $this->getNextEmbedBlock();
}
$c = $this->getRealCurrentLineNb() + 1;
$parser = new self($c);
$parser->refs = &$this->refs;
$parsed = $parser->parse($value, $exceptionOnInvalidType, $objectSupport, $objectForMap);
if (!is_array($parsed)) {
throw new ParseException('YAML merge keys used with a scalar value instead of an array.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
}
if (isset($parsed[0])) {
// If the value associated with the merge key is a sequence, then this sequence is expected to contain mapping nodes
// and each of these nodes is merged in turn according to its order in the sequence. Keys in mapping nodes earlier
// in the sequence override keys specified in later mapping nodes.
foreach ($parsed as $parsedItem) {
if (!is_array($parsedItem)) {
throw new ParseException('Merge items must be arrays.', $this->getRealCurrentLineNb() + 1, $parsedItem);
}
foreach ($parsedItem as $key => $value) {
if (!isset($data[$key])) {
$data[$key] = $value;
}
}
}
} else {
// If the value associated with the key is a single mapping node, each of its key/value pairs is inserted into the
// current mapping, unless the key already exists in it.
foreach ($parsed as $key => $value) {
if (!isset($data[$key])) {
$data[$key] = $value;
}
}
}
}
} elseif (isset($values['value']) && preg_match('#^&(?P<ref>[^ ]+) *(?P<value>.*)#u', $values['value'], $matches)) {
$isRef = $matches['ref'];
$values['value'] = $matches['value'];
}
if ($mergeNode) {
// Merge keys
} elseif (!isset($values['value']) || '' == trim($values['value'], ' ') || 0 === strpos(ltrim($values['value'], ' '), '#')) {
// hash
// if next line is less indented or equal, then it means that the current value is null
if (!$this->isNextLineIndented() && !$this->isNextLineUnIndentedCollection()) {
// Spec: Keys MUST be unique; first one wins.
// But overwriting is allowed when a merge node is used in current block.
if ($allowOverwrite || !isset($data[$key])) {
$data[$key] = null;
}
} else {
$c = $this->getRealCurrentLineNb() + 1;
$parser = new self($c);
$parser->refs = &$this->refs;
$value = $parser->parse($this->getNextEmbedBlock(), $exceptionOnInvalidType, $objectSupport, $objectForMap);
// Spec: Keys MUST be unique; first one wins.
// But overwriting is allowed when a merge node is used in current block.
if ($allowOverwrite || !isset($data[$key])) {
$data[$key] = $value;
}
}
} else {
$value = $this->parseValue($values['value'], $exceptionOnInvalidType, $objectSupport, $objectForMap, $context);
// Spec: Keys MUST be unique; first one wins.
// But overwriting is allowed when a merge node is used in current block.
if ($allowOverwrite || !isset($data[$key])) {
$data[$key] = $value;
}
}
if ($isRef) {
$this->refs[$isRef] = $data[$key];
}
} else {
// multiple documents are not supported
if ('---' === $this->currentLine) {
throw new ParseException('Multiple documents are not supported.');
}
// 1-liner optionally followed by newline(s)
if (is_string($value) && $this->lines[0] === trim($value)) {
try {
$value = Inline::parse($this->lines[0], $exceptionOnInvalidType, $objectSupport, $objectForMap, $this->refs);
} catch (ParseException $e) {
$e->setParsedLine($this->getRealCurrentLineNb() + 1);
$e->setSnippet($this->currentLine);
throw $e;
}
if (is_array($value)) {
$first = reset($value);
if (is_string($first) && 0 === strpos($first, '*')) {
$data = array();
foreach ($value as $alias) {
$data[] = $this->refs[substr($alias, 1)];
}
$value = $data;
}
}
if (isset($mbEncoding)) {
mb_internal_encoding($mbEncoding);
}
return $value;
}
switch (preg_last_error()) {
case PREG_INTERNAL_ERROR:
$error = 'Internal PCRE error.';
break;
case PREG_BACKTRACK_LIMIT_ERROR:
$error = 'pcre.backtrack_limit reached.';
break;
case PREG_RECURSION_LIMIT_ERROR:
$error = 'pcre.recursion_limit reached.';
break;
case PREG_BAD_UTF8_ERROR:
$error = 'Malformed UTF-8 data.';
break;
case PREG_BAD_UTF8_OFFSET_ERROR:
$error = 'Offset doesn\'t correspond to the begin of a valid UTF-8 code point.';
break;
default:
$error = 'Unable to parse.';
}
throw new ParseException($error, $this->getRealCurrentLineNb() + 1, $this->currentLine);
}
}
if (isset($mbEncoding)) {
mb_internal_encoding($mbEncoding);
}
if ($objectForMap && !is_object($data) && 'mapping' === $context) {
$object = new \stdClass();
foreach ($data as $key => $value) {
$object->$key = $value;
}
$data = $object;
}
return empty($data) ? null : $data;
}
/**
* Returns the current line number (takes the offset into account).
*
* @return int The current line number
*/
private function getRealCurrentLineNb()
{
return $this->currentLineNb + $this->offset;
}
/**
* Returns the current line indentation.
*
* @return int The current line indentation
*/
private function getCurrentLineIndentation()
{
return strlen($this->currentLine) - strlen(ltrim($this->currentLine, ' '));
}
/**
* Returns the next embed block of YAML.
*
* @param int $indentation The indent level at which the block is to be read, or null for default
* @param bool $inSequence True if the enclosing data structure is a sequence
*
* @return string A YAML string
*
* @throws ParseException When indentation problem are detected
*/
private function getNextEmbedBlock($indentation = null, $inSequence = false)
{
$oldLineIndentation = $this->getCurrentLineIndentation();
$blockScalarIndentations = array();
if ($this->isBlockScalarHeader()) {
$blockScalarIndentations[] = $this->getCurrentLineIndentation();
}
if (!$this->moveToNextLine()) {
return;
}
if (null === $indentation) {
$newIndent = $this->getCurrentLineIndentation();
$unindentedEmbedBlock = $this->isStringUnIndentedCollectionItem();
if (!$this->isCurrentLineEmpty() && 0 === $newIndent && !$unindentedEmbedBlock) {
throw new ParseException('Indentation problem.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
}
} else {
$newIndent = $indentation;
}
$data = array();
if ($this->getCurrentLineIndentation() >= $newIndent) {
$data[] = substr($this->currentLine, $newIndent);
} else {
$this->moveToPreviousLine();
return;
}
if ($inSequence && $oldLineIndentation === $newIndent && isset($data[0][0]) && '-' === $data[0][0]) {
// the previous line contained a dash but no item content, this line is a sequence item with the same indentation
// and therefore no nested list or mapping
$this->moveToPreviousLine();
return;
}
$isItUnindentedCollection = $this->isStringUnIndentedCollectionItem();
if (empty($blockScalarIndentations) && $this->isBlockScalarHeader()) {
$blockScalarIndentations[] = $this->getCurrentLineIndentation();
}
$previousLineIndentation = $this->getCurrentLineIndentation();
while ($this->moveToNextLine()) {
$indent = $this->getCurrentLineIndentation();
// terminate all block scalars that are more indented than the current line
if (!empty($blockScalarIndentations) && $indent < $previousLineIndentation && trim($this->currentLine) !== '') {
foreach ($blockScalarIndentations as $key => $blockScalarIndentation) {
if ($blockScalarIndentation >= $this->getCurrentLineIndentation()) {
unset($blockScalarIndentations[$key]);
}
}
}
if (empty($blockScalarIndentations) && !$this->isCurrentLineComment() && $this->isBlockScalarHeader()) {
$blockScalarIndentations[] = $this->getCurrentLineIndentation();
}
$previousLineIndentation = $indent;
if ($isItUnindentedCollection && !$this->isStringUnIndentedCollectionItem() && $newIndent === $indent) {
$this->moveToPreviousLine();
break;
}
if ($this->isCurrentLineBlank()) {
$data[] = substr($this->currentLine, $newIndent);
continue;
}
// we ignore "comment" lines only when we are not inside a scalar block
if (empty($blockScalarIndentations) && $this->isCurrentLineComment()) {
continue;
}
if ($indent >= $newIndent) {
$data[] = substr($this->currentLine, $newIndent);
} elseif (0 == $indent) {
$this->moveToPreviousLine();
break;
} else {
throw new ParseException('Indentation problem.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
}
}
return implode("\n", $data);
}
/**
* Moves the parser to the next line.
*
* @return bool
*/
private function moveToNextLine()
{
if ($this->currentLineNb >= count($this->lines) - 1) {
return false;
}
$this->currentLine = $this->lines[++$this->currentLineNb];
return true;
}
/**
* Moves the parser to the previous line.
*/
private function moveToPreviousLine()
{
$this->currentLine = $this->lines[--$this->currentLineNb];
}
/**
* Parses a YAML value.
*
* @param string $value A YAML value
* @param bool $exceptionOnInvalidType True if an exception must be thrown on invalid types false otherwise
* @param bool $objectSupport True if object support is enabled, false otherwise
* @param bool $objectForMap true if maps should return a stdClass instead of array()
* @param string $context The parser context (either sequence or mapping)
*
* @return mixed A PHP value
*
* @throws ParseException When reference does not exist
*/
private function parseValue($value, $exceptionOnInvalidType, $objectSupport, $objectForMap, $context)
{
if (0 === strpos($value, '*')) {
if (false !== $pos = strpos($value, '#')) {
$value = substr($value, 1, $pos - 2);
} else {
$value = substr($value, 1);
}
if (!array_key_exists($value, $this->refs)) {
throw new ParseException(sprintf('Reference "%s" does not exist.', $value), $this->currentLine);
}
return $this->refs[$value];
}
if (preg_match('/^'.self::BLOCK_SCALAR_HEADER_PATTERN.'$/', $value, $matches)) {
$modifiers = isset($matches['modifiers']) ? $matches['modifiers'] : '';
return $this->parseBlockScalar($matches['separator'], preg_replace('#\d+#', '', $modifiers), (int) abs($modifiers));
}
try {
$parsedValue = Inline::parse($value, $exceptionOnInvalidType, $objectSupport, $objectForMap, $this->refs);
if ('mapping' === $context && '"' !== $value[0] && "'" !== $value[0] && '[' !== $value[0] && '{' !== $value[0] && '!' !== $value[0] && false !== strpos($parsedValue, ': ')) {
throw new ParseException('A colon cannot be used in an unquoted mapping value.');
}
return $parsedValue;
} catch (ParseException $e) {
$e->setParsedLine($this->getRealCurrentLineNb() + 1);
$e->setSnippet($this->currentLine);
throw $e;
}
}
/**
* Parses a block scalar.
*
* @param string $style The style indicator that was used to begin this block scalar (| or >)
* @param string $chomping The chomping indicator that was used to begin this block scalar (+ or -)
* @param int $indentation The indentation indicator that was used to begin this block scalar
*
* @return string The text value
*/
private function parseBlockScalar($style, $chomping = '', $indentation = 0)
{
$notEOF = $this->moveToNextLine();
if (!$notEOF) {
return '';
}
$isCurrentLineBlank = $this->isCurrentLineBlank();
$blockLines = array();
// leading blank lines are consumed before determining indentation
while ($notEOF && $isCurrentLineBlank) {
// newline only if not EOF
if ($notEOF = $this->moveToNextLine()) {
$blockLines[] = '';
$isCurrentLineBlank = $this->isCurrentLineBlank();
}
}
// determine indentation if not specified
if (0 === $indentation) {
if (preg_match('/^ +/', $this->currentLine, $matches)) {
$indentation = strlen($matches[0]);
}
}
if ($indentation > 0) {
$pattern = sprintf('/^ {%d}(.*)$/', $indentation);
while (
$notEOF && (
$isCurrentLineBlank ||
preg_match($pattern, $this->currentLine, $matches)
)
) {
if ($isCurrentLineBlank && strlen($this->currentLine) > $indentation) {
$blockLines[] = substr($this->currentLine, $indentation);
} elseif ($isCurrentLineBlank) {
$blockLines[] = '';
} else {
$blockLines[] = $matches[1];
}
// newline only if not EOF
if ($notEOF = $this->moveToNextLine()) {
$isCurrentLineBlank = $this->isCurrentLineBlank();
}
}
} elseif ($notEOF) {
$blockLines[] = '';
}
if ($notEOF) {
$blockLines[] = '';
$this->moveToPreviousLine();
}
// folded style
if ('>' === $style) {
$text = '';
$previousLineIndented = false;
$previousLineBlank = false;
for ($i = 0; $i < count($blockLines); ++$i) {
if ('' === $blockLines[$i]) {
$text .= "\n";
$previousLineIndented = false;
$previousLineBlank = true;
} elseif (' ' === $blockLines[$i][0]) {
$text .= "\n".$blockLines[$i];
$previousLineIndented = true;
$previousLineBlank = false;
} elseif ($previousLineIndented) {
$text .= "\n".$blockLines[$i];
$previousLineIndented = false;
$previousLineBlank = false;
} elseif ($previousLineBlank || 0 === $i) {
$text .= $blockLines[$i];
$previousLineIndented = false;
$previousLineBlank = false;
} else {
$text .= ' '.$blockLines[$i];
$previousLineIndented = false;
$previousLineBlank = false;
}
}
} else {
$text = implode("\n", $blockLines);
}
// deal with trailing newlines
if ('' === $chomping) {
$text = preg_replace('/\n+$/', "\n", $text);
} elseif ('-' === $chomping) {
$text = preg_replace('/\n+$/', '', $text);
}
return $text;
}
/**
* Returns true if the next line is indented.
*
* @return bool Returns true if the next line is indented, false otherwise
*/
private function isNextLineIndented()
{
$currentIndentation = $this->getCurrentLineIndentation();
$EOF = !$this->moveToNextLine();
while (!$EOF && $this->isCurrentLineEmpty()) {
$EOF = !$this->moveToNextLine();
}
if ($EOF) {
return false;
}
$ret = false;
if ($this->getCurrentLineIndentation() > $currentIndentation) {
$ret = true;
}
$this->moveToPreviousLine();
return $ret;
}
/**
* Returns true if the current line is blank or if it is a comment line.
*
* @return bool Returns true if the current line is empty or if it is a comment line, false otherwise
*/
private function isCurrentLineEmpty()
{
return $this->isCurrentLineBlank() || $this->isCurrentLineComment();
}
/**
* Returns true if the current line is blank.
*
* @return bool Returns true if the current line is blank, false otherwise
*/
private function isCurrentLineBlank()
{
return '' == trim($this->currentLine, ' ');
}
/**
* Returns true if the current line is a comment line.
*
* @return bool Returns true if the current line is a comment line, false otherwise
*/
private function isCurrentLineComment()
{
//checking explicitly the first char of the trim is faster than loops or strpos
$ltrimmedLine = ltrim($this->currentLine, ' ');
return '' !== $ltrimmedLine && $ltrimmedLine[0] === '#';
}
/**
* Cleanups a YAML string to be parsed.
*
* @param string $value The input YAML string
*
* @return string A cleaned up YAML string
*/
private function cleanup($value)
{
$value = str_replace(array("\r\n", "\r"), "\n", $value);
// strip YAML header
$count = 0;
$value = preg_replace('#^\%YAML[: ][\d\.]+.*\n#u', '', $value, -1, $count);
$this->offset += $count;
// remove leading comments
$trimmedValue = preg_replace('#^(\#.*?\n)+#s', '', $value, -1, $count);
if ($count == 1) {
// items have been removed, update the offset
$this->offset += substr_count($value, "\n") - substr_count($trimmedValue, "\n");
$value = $trimmedValue;
}
// remove start of the document marker (---)
$trimmedValue = preg_replace('#^\-\-\-.*?\n#s', '', $value, -1, $count);
if ($count == 1) {
// items have been removed, update the offset
$this->offset += substr_count($value, "\n") - substr_count($trimmedValue, "\n");
$value = $trimmedValue;
// remove end of the document marker (...)
$value = preg_replace('#\.\.\.\s*$#', '', $value);
}
return $value;
}
/**
* Returns true if the next line starts unindented collection.
*
* @return bool Returns true if the next line starts unindented collection, false otherwise
*/
private function isNextLineUnIndentedCollection()
{
$currentIndentation = $this->getCurrentLineIndentation();
$notEOF = $this->moveToNextLine();
while ($notEOF && $this->isCurrentLineEmpty()) {
$notEOF = $this->moveToNextLine();
}
if (false === $notEOF) {
return false;
}
$ret = false;
if (
$this->getCurrentLineIndentation() == $currentIndentation
&&
$this->isStringUnIndentedCollectionItem()
) {
$ret = true;
}
$this->moveToPreviousLine();
return $ret;
}
/**
* Returns true if the string is un-indented collection item.
*
* @return bool Returns true if the string is un-indented collection item, false otherwise
*/
private function isStringUnIndentedCollectionItem()
{
return 0 === strpos($this->currentLine, '- ');
}
/**
* Tests whether or not the current line is the header of a block scalar.
*
* @return bool
*/
private function isBlockScalarHeader()
{
return (bool) preg_match('~'.self::BLOCK_SCALAR_HEADER_PATTERN.'$~', $this->currentLine);
}
}

141
Classes/DeviceDetector/Yaml/Unescaper.php Normal file
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@ -0,0 +1,141 @@
<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace WapplerSystems\ABTest2\DeviceDetector\Yaml;
/**
* Unescaper encapsulates unescaping rules for single and double-quoted
* YAML strings.
*
* @author Matthew Lewinski <matthew@lewinski.org>
*
* @internal
*/
class Unescaper
{
/**
* Regex fragment that matches an escaped character in a double quoted string.
*/
const REGEX_ESCAPED_CHARACTER = '\\\\(x[0-9a-fA-F]{2}|u[0-9a-fA-F]{4}|U[0-9a-fA-F]{8}|.)';
/**
* Unescapes a single quoted string.
*
* @param string $value A single quoted string.
*
* @return string The unescaped string.
*/
public function unescapeSingleQuotedString($value)
{
return str_replace('\'\'', '\'', $value);
}
/**
* Unescapes a double quoted string.
*
* @param string $value A double quoted string.
*
* @return string The unescaped string.
*/
public function unescapeDoubleQuotedString($value)
{
$callback = function ($match) {
return $this->unescapeCharacter($match[0]);
};
// evaluate the string
return preg_replace_callback('/'.self::REGEX_ESCAPED_CHARACTER.'/u', $callback, $value);
}
/**
* Unescapes a character that was found in a double-quoted string.
*
* @param string $value An escaped character
*
* @return string The unescaped character
*/
private function unescapeCharacter($value)
{
switch ($value[1]) {
case '0':
return "\x0";
case 'a':
return "\x7";
case 'b':
return "\x8";
case 't':
return "\t";
case "\t":
return "\t";
case 'n':
return "\n";
case 'v':
return "\xB";
case 'f':
return "\xC";
case 'r':
return "\r";
case 'e':
return "\x1B";
case ' ':
return ' ';
case '"':
return '"';
case '/':
return '/';
case '\\':
return '\\';
case 'N':
// U+0085 NEXT LINE
return "\xC2\x85";
case '_':
// U+00A0 NO-BREAK SPACE
return "\xC2\xA0";
case 'L':
// U+2028 LINE SEPARATOR
return "\xE2\x80\xA8";
case 'P':
// U+2029 PARAGRAPH SEPARATOR
return "\xE2\x80\xA9";
case 'x':
return self::utf8chr(hexdec(substr($value, 2, 2)));
case 'u':
return self::utf8chr(hexdec(substr($value, 2, 4)));
case 'U':
return self::utf8chr(hexdec(substr($value, 2, 8)));
default:
throw new ParseException(sprintf('Found unknown escape character "%s".', $value));
}
}
/**
* Get the UTF-8 character for the given code point.
*
* @param int $c The unicode code point
*
* @return string The corresponding UTF-8 character
*/
private static function utf8chr($c)
{
if (0x80 > $c %= 0x200000) {
return chr($c);
}
if (0x800 > $c) {
return chr(0xC0 | $c >> 6).chr(0x80 | $c & 0x3F);
}
if (0x10000 > $c) {
return chr(0xE0 | $c >> 12).chr(0x80 | $c >> 6 & 0x3F).chr(0x80 | $c & 0x3F);
}
return chr(0xF0 | $c >> 18).chr(0x80 | $c >> 12 & 0x3F).chr(0x80 | $c >> 6 & 0x3F).chr(0x80 | $c & 0x3F);
}
}

13
Classes/Helper.php
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@ -13,6 +13,8 @@ use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController; use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
use TYPO3\CMS\Frontend\Page\CacheHashCalculator; use TYPO3\CMS\Frontend\Page\CacheHashCalculator;
use TYPO3\CMS\Frontend\Page\PageRepository; use TYPO3\CMS\Frontend\Page\PageRepository;
use WapplerSystems\ABTest2\DeviceDetector\DeviceDetector;
use WapplerSystems\ABTest2\DeviceDetector\Yaml\Parser;
/** /**
* This class detects which page version (either by cookie or by random) and sets the page content ID accordingly. * This class detects which page version (either by cookie or by random) and sets the page content ID accordingly.
@ -32,9 +34,14 @@ class Helper
*/ */
public function determineContentId(array $params, &$tsFeController) public function determineContentId(array $params, &$tsFeController)
{ {
$deviceDetector = new DeviceDetector();
// only try to change the page if it's not the googlebot. $deviceDetector->setUserAgent($_SERVER['HTTP_USER_AGENT']);
if (true === stripos($_SERVER['HTTP_USER_AGENT'], 'googlebot')) return; try {
$deviceDetector->setYamlParser(new Parser());
$deviceDetector->parse();
if ($deviceDetector->isBot()) return;
} catch (\Exception $e) {
}
$currentPageId = $targetPageId = $tsFeController->id; $currentPageId = $targetPageId = $tsFeController->id;

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Configuration/YAML/bots.yml Normal file
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