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<?php |
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namespace vipnytt\RobotsTxtParser; |
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use GuzzleHttp; |
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/** |
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* Class ClientURI |
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* |
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* @package vipnytt\RobotsTxtParser |
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*/ |
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class URI extends Basic |
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{ |
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const GUZZLE_HTTP_CONFIG = [ |
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'allow_redirects' => [ |
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'max' => self::MAX_REDIRECTS, |
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'referer' => true, |
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'strict' => true, |
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], |
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'decode_content' => true, |
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'headers' => [ |
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'Accept' => 'text/plain;q=1.0, text/*;q=0.8, */*;q=0.1', |
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'Accept-Charset' => 'utf-8;q=1.0, *;q=0.1', |
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'Accept-Encoding' => 'identity;q=1.0, *;q=0.1', |
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'User-Agent' => 'RobotsTxtParser-VIPnytt/2.0 (+https://github.com/VIPnytt/RobotsTxtParser/blob/master/README.md)', |
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], |
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'http_errors' => false, |
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'verify' => true, |
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]; |
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/** |
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* Status code |
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* @var int |
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*/ |
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protected $statusCode; |
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/** |
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* RequestClient timestamp |
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* @var int |
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*/ |
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private $time; |
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/** |
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* Cache-Control max-age |
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* @var int |
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*/ |
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private $maxAge; |
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/** |
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* Robots.txt contents |
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* @var string |
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*/ |
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private $contents; |
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/** |
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* Robots.txt character encoding |
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* @var string |
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*/ |
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private $encoding; |
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/** |
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* RequestClient constructor. |
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* |
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* @param string $baseUri |
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* @param array $guzzleConfig |
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* @param int|null $byteLimit |
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*/ |
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public function __construct($baseUri, array $guzzleConfig = [], $byteLimit = self::BYTE_LIMIT) |
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{ |
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$baseUri = $this->urlBase($this->urlEncode($baseUri)); |
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try { |
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$client = new GuzzleHttp\Client( |
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array_merge_recursive( |
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self::GUZZLE_HTTP_CONFIG, |
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$guzzleConfig, |
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[ |
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'base_uri' => $baseUri, |
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] |
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) |
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); |
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$response = $client->request('GET', self::PATH); |
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$this->time = time(); |
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$this->statusCode = $response->getStatusCode(); |
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$this->contents = $response->getBody()->getContents(); |
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$this->encoding = $this->headerEncoding($response->getHeader('content-type')); |
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$this->maxAge = $this->headerMaxAge($response->getHeader('cache-control')); |
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} catch (GuzzleHttp\Exception\TransferException $e) { |
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$this->statusCode = 523; |
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$this->contents = ''; |
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$this->encoding = self::ENCODING; |
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$this->maxAge = 0; |
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} |
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parent::__construct($baseUri, $this->statusCode, $this->contents, $this->encoding, $byteLimit); |
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} |
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/** |
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* Content-Type encoding HTTP header |
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* |
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* @param string[] $headers |
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* @return string |
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*/ |
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private function headerEncoding(array $headers) |
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{ |
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if (($value = $this->parseHeader($headers, 'charset', ';')) !== false) { |
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return $value; |
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} |
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return self::ENCODING; |
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} |
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/** |
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* Client header |
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* |
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* @param string[] $headers |
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* @param string $part |
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* @param string $delimiter |
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* @return string|false |
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*/ |
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private function parseHeader(array $headers, $part, $delimiter = ";") |
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{ |
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foreach ($headers as $header) { |
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foreach (array_map('trim', mb_split($delimiter, $header)) as $string) { |
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if (mb_stripos($string, $part . '=') === 0) { |
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return mb_split('=', $string, 2)[1]; |
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} |
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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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* Cache-Control max-age HTTP header |
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* |
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* @param string[] $headers |
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* @return int |
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*/ |
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private function headerMaxAge(array $headers) |
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{ |
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if (($value = $this->parseHeader($headers, 'max-age', ',')) !== false) { |
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return intval($value); |
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} |
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return 0; |
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} |
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/** |
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* Base URI |
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* |
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* @return string |
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*/ |
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public function getBaseUri() |
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{ |
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return $this->base; |
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} |
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/** |
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* Status code |
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* |
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* @return int |
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*/ |
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public function getStatusCode() |
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{ |
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return $this->statusCode; |
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} |
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/** |
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* URL content |
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* |
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* @return string |
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*/ |
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public function getContents() |
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{ |
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return $this->contents; |
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} |
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/** |
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* Encoding |
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* |
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* @return string |
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*/ |
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public function getEncoding() |
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{ |
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return $this->encoding; |
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} |
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/** |
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* Next update timestamp |
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* |
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* @return int |
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*/ |
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public function nextUpdate() |
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{ |
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return $this->time + self::CACHE_TIME; |
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} |
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/** |
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* Valid until timestamp |
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* |
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* @return int |
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*/ |
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public function validUntil() |
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{ |
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return $this->time + max(self::CACHE_TIME, $this->maxAge); |
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} |
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} |
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VIPnytt /
RobotsTxtParser
