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<?php |
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namespace vipnytt\RobotsTxtParser; |
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use vipnytt\RobotsTxtParser\Directives\DisAllow; |
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use vipnytt\RobotsTxtParser\Exceptions\ClientException; |
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use vipnytt\RobotsTxtParser\Exceptions\ParserException; |
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class UserAgentClient implements RobotsTxtInterface |
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{ |
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protected $allow; |
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protected $disallow; |
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protected $userAgent; |
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protected $origin; |
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protected $statusCodeParser; |
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/** |
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* UserAgentClient constructor. |
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* |
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* @param array $rules |
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* @param string $userAgent |
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* @param string $origin |
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* @param int $statusCode |
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*/ |
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public function __construct($rules, $userAgent, $origin, $statusCode) |
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{ |
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$this->statusCodeParser = new StatusCodeParser($statusCode, parse_url($origin, PHP_URL_SCHEME)); |
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$this->userAgent = $userAgent; |
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$this->origin = $origin; |
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$this->validateRules($rules); |
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} |
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protected function validateRules($rules) |
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{ |
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foreach ([self::DIRECTIVE_DISALLOW, self::DIRECTIVE_ALLOW] as $directive) { |
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if (!$rules[$directive] instanceof DisAllow) { |
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throw new ParserException('Invalid rule object'); |
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} |
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$this->$directive = $rules[$directive]; |
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} |
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} |
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/** |
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* Check if URL is allowed to crawl |
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* |
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* @param string $url |
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* @return bool |
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*/ |
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public function isAllowed($url) |
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{ |
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return $this->check(self::DIRECTIVE_ALLOW, $url); |
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} |
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/** |
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* Check |
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* |
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* @param string $directive |
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* @param string $url - URL to check |
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* @return bool |
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* @throws ClientException |
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*/ |
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protected function check($directive, $url) |
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{ |
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if (!$this->isUrlApplicable($url)) { |
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throw new ClientException('URL belongs to a different robots.txt, please check it against that one instead'); |
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} |
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$this->statusCodeParser->replaceUnofficial(); |
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if (($result = $this->statusCodeParser->check()) !== null) { |
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return $directive === $result; |
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} |
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$result = self::DIRECTIVE_ALLOW; |
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foreach ([self::DIRECTIVE_DISALLOW, self::DIRECTIVE_ALLOW] as $currentDirective) { |
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if ($this->$currentDirective->check($url)) { |
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$result = $currentDirective; |
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} |
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} |
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return $directive === $result; |
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} |
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protected function isUrlApplicable($urls) |
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{ |
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foreach ($urls as $url) { |
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$parsed = parse_url($url); |
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$parsed['port'] = is_int($port = parse_url($url, PHP_URL_PORT)) ? $port : getservbyname($parsed['scheme'], 'tcp'); |
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$assembled = $parsed['scheme'] . '://' . $parsed['host'] . ':' . $parsed['port']; |
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if (!isset($result)) { |
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$result = $assembled; |
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} elseif ($result !== $assembled) { |
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return false; |
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} |
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} |
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return true; |
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} |
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/** |
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* Check if URL is disallowed to crawl |
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* |
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* @param string $url |
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* @return bool |
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*/ |
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public function isDisallowed($url) |
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{ |
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return $this->check(self::DIRECTIVE_DISALLOW, $url); |
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} |
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/** |
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* Get Cache-delay |
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* |
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* @return float|int |
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*/ |
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public function getCacheDelay() |
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{ |
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$exported = $this->{self::DIRECTIVE_CACHE_DELAY}->export(); |
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return isset($exported[self::DIRECTIVE_CACHE_DELAY]) ? $exported[self::DIRECTIVE_CACHE_DELAY] : $this->getCrawlDelay(); |
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} |
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/** |
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* Get Crawl-delay |
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* |
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* @return float|int |
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*/ |
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public function getCrawlDelay() |
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{ |
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$exported = $this->{self::DIRECTIVE_CRAWL_DELAY}->export(); |
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return isset($exported[self::DIRECTIVE_CRAWL_DELAY]) ? $exported[self::DIRECTIVE_CRAWL_DELAY] : 0; |
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} |
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} |
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VIPnytt /
RobotsTxtParser
