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<?php |
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namespace vipnytt\RobotsTxtParser\Parser; |
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use vipnytt\RobotsTxtParser\Exceptions\ClientException; |
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/** |
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* Trait UrlParser |
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* |
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* @package vipnytt\RobotsTxtParser\Parser |
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*/ |
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trait UrlParser |
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{ |
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/** |
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* Convert relative to full URL |
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* |
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* @param string $url |
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* @param string $base |
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* @return string |
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* @throws ClientException |
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*/ |
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private function urlConvertToFull($url, $base) |
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{ |
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$url = $this->urlEncode($url); |
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if ($this->urlValidate($url)) { |
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return $url; |
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} elseif (mb_stripos($url, '/') === 0) { |
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return $this->urlBase($base) . $url; |
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} |
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throw new ClientException('Invalid URL'); |
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} |
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/** |
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* URL encoder according to RFC 3986 |
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* Returns a string containing the encoded URL with disallowed characters converted to their percentage encodings. |
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* @link http://publicmind.in/blog/url-encoding/ |
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* |
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* @param string $url |
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* @return string |
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*/ |
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protected function urlEncode($url) |
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{ |
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$reserved = [ |
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":" => '!%3A!ui', |
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"/" => '!%2F!ui', |
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"?" => '!%3F!ui', |
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"#" => '!%23!ui', |
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"[" => '!%5B!ui', |
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"]" => '!%5D!ui', |
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"@" => '!%40!ui', |
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"!" => '!%21!ui', |
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"$" => '!%24!ui', |
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"&" => '!%26!ui', |
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"'" => '!%27!ui', |
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"(" => '!%28!ui', |
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")" => '!%29!ui', |
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"*" => '!%2A!ui', |
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"+" => '!%2B!ui', |
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"," => '!%2C!ui', |
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";" => '!%3B!ui', |
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"=" => '!%3D!ui', |
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"%" => '!%25!ui' |
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]; |
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return preg_replace(array_values($reserved), array_keys($reserved), rawurlencode($url)); |
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} |
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/** |
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* Validate URL |
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* |
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* @param string $url |
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* @return bool |
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*/ |
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private function urlValidate($url) |
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{ |
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return ( |
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filter_var($url, FILTER_VALIDATE_URL) && |
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($parsed = parse_url($url)) !== false && |
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$this->urlValidateHost($parsed['host']) && |
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$this->urlValidateScheme($parsed['scheme']) |
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); |
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} |
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/** |
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* Validate host name |
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* |
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* @link http://stackoverflow.com/questions/1755144/how-to-validate-domain-name-in-php |
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* |
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* @param string $host |
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* @return bool |
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*/ |
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private static function urlValidateHost($host) |
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{ |
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return ( |
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preg_match("/^([a-z\d](-*[a-z\d])*)(\.([a-z\d](-*[a-z\d])*))*$/i", $host) //valid chars check |
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&& preg_match("/^.{1,253}$/", $host) //overall length check |
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&& preg_match("/^[^\.]{1,63}(\.[^\.]{1,63})*$/", $host) //length of each label |
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&& !filter_var($host, FILTER_VALIDATE_IP) //is not an IP address |
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); |
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} |
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/** |
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* Validate URL scheme |
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* |
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* @param string $scheme |
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* @return bool |
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*/ |
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private static function urlValidateScheme($scheme) |
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{ |
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return in_array(mb_strtolower($scheme), [ |
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'http', |
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'https', |
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'ftp', |
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'sftp', |
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'ftps', |
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] |
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); |
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} |
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/** |
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* Base URL |
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* |
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* @param string $url |
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* @return string |
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* @throws ClientException |
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*/ |
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protected function urlBase($url) |
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{ |
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if ($this->urlValidate($url) === false) { |
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throw new ClientException('Invalid URL'); |
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} |
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$parts = [ |
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'scheme' => parse_url($url, PHP_URL_SCHEME), |
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'host' => parse_url($url, PHP_URL_HOST), |
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]; |
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$parts['port'] = is_int($port = parse_url($url, PHP_URL_PORT)) ? $port : getservbyname($parts['scheme'], 'tcp'); |
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return $parts['scheme'] . '://' . $parts['host'] . ':' . $parts['port']; |
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} |
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} |
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VIPnytt /
RobotsTxtParser
