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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 UriParser |
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* |
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* @package vipnytt\RobotsTxtParser\Parser |
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*/ |
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trait UriParser |
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{ |
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/** |
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* Convert relative to full uri |
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* |
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* @param string $uri |
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* @param string $base |
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* @return string |
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* @throws ClientException |
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*/ |
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private function uriConvertToFull($uri, $base) |
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{ |
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$uri = $this->uriEncode($uri); |
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if ($this->uriValidate($uri)) { |
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return $uri; |
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} elseif (stripos($uri, '/') === 0) { |
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return $this->uriBase($base) . $uri; |
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} |
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throw new ClientException("Invalid URI `$uri`"); |
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} |
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/** |
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* URI encoder according to RFC 3986 |
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* Returns a string containing the encoded URI 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 $uri |
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* @return string |
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*/ |
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protected function uriEncode($uri) |
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{ |
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$reserved = [ |
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'!%21!ui' => "!", |
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'!%23!ui' => "#", |
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'!%24!ui' => "$", |
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'!%25!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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'!%2F!ui' => "/", |
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'!%3A!ui' => ":", |
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'!%3B!ui' => ";", |
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'!%3D!ui' => "=", |
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'!%3F!ui' => "?", |
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'!%40!ui' => "@", |
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'!%5B!ui' => "[", |
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'!%5D!ui' => "]", |
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]; |
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return preg_replace(array_keys($reserved), array_values($reserved), rawurlencode($uri)); |
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} |
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/** |
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* Validate uri |
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* |
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* @param string $uri |
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* @return bool |
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*/ |
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private function uriValidate($uri) |
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{ |
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return ( |
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( |
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filter_var($uri, FILTER_VALIDATE_URL) || |
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// PHP 5.x bug fix: FILTER_VALIDATE_URL doesn't support IPv6 urls. IP check not needed in the future. |
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$this->uriValidateIP(parse_url($uri, PHP_URL_HOST)) |
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) && |
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($parsed = parse_url($uri)) !== false && |
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( |
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$this->uriValidateHost($parsed['host']) || |
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$this->uriValidateIP($parsed['host']) |
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) && |
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$this->uriValidateScheme($parsed['scheme']) |
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); |
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} |
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/** |
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* Validate IPv4 or IPv6 |
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* |
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* @param string $ip |
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* @return bool |
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*/ |
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private function uriValidateIP($ip) |
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{ |
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return ( |
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filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) || |
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filter_var(trim($ip, '[]'), FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) |
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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 $host |
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* @return bool |
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*/ |
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private function uriValidateHost($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", $host) //valid chars check |
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&& preg_match("/^.{1,253}$/", $host) //overall length check |
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&& preg_match("/^[^\.]{1,63}(\.[^\.]{1,63})*$/", $host) //length of each label |
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&& !$this->uriValidateIP($host) |
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); |
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} |
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/** |
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* Validate uri scheme |
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* |
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* @param string $scheme |
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* @return bool |
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*/ |
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private function uriValidateScheme($scheme) |
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{ |
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return in_array(strtolower($scheme), [ |
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'http', |
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'https', |
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'ftp', |
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'ftps', |
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'sftp', |
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] |
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); |
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} |
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/** |
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* Base uri |
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* |
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* @param string $uri |
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* @return string |
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* @throws ClientException |
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*/ |
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protected function uriBase($uri) |
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{ |
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if ($this->uriValidate($uri) === false) { |
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throw new ClientException("Invalid or unsupported URI `$uri`"); |
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} |
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$parts = [ |
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'scheme' => parse_url($uri, PHP_URL_SCHEME), |
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'host' => parse_url($uri, PHP_URL_HOST), |
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]; |
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$parts['port'] = is_int($port = parse_url($uri, 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
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