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<?php |
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namespace BFW; |
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/** |
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* Class to get informations about http request. |
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* Singleton pattern. |
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*/ |
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class Request |
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{ |
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/** |
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* @const ERR_KEY_NOT_EXIST Exception code if a key not exist into the |
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* $_SERVER array. |
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*/ |
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const ERR_KEY_NOT_EXIST = 1107001; |
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/** |
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* @var \BFW\Request $instance Instance for this class (singleton pattern) |
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*/ |
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protected static $instance = null; |
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/** |
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* @var string $ip The client IP |
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*/ |
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protected $ip = ''; |
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/** |
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* @var string $lang The client primary language |
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*/ |
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protected $lang = ''; |
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/** |
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* @var string $referer The referer url |
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*/ |
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protected $referer = ''; |
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/** |
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* @var string $method The HTTP method (GET/POST/PUT/DELETE/...) |
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*/ |
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protected $method = ''; |
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/** |
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* @var boolean|null $ssl If the request is with ssl (https) or not |
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*/ |
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protected $ssl; |
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/** |
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* @var \stdClass|null The current request |
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*/ |
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protected $request; |
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/** |
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* Create singleton instance for this class |
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* |
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* @return \BFW\Request |
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*/ |
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public static function getInstance(): Request |
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{ |
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if (self::$instance === null) { |
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$calledClass = get_called_class(); //Autorize extends this class |
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self::$instance = new $calledClass; |
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} |
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return self::$instance; |
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} |
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/** |
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* Get the client IP |
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* |
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* @return string |
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*/ |
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public function getIp(): string |
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{ |
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return $this->ip; |
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} |
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/** |
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* Get the client primary language |
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* |
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* @return string |
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*/ |
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public function getLang(): string |
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{ |
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return $this->lang; |
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} |
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/** |
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* Get the referer url |
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* |
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* @return string |
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*/ |
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public function getReferer(): string |
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{ |
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return $this->referer; |
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} |
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/** |
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* Get the http method |
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* |
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* @return string |
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*/ |
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public function getMethod(): string |
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{ |
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return $this->method; |
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} |
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/** |
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* Get information about if the request is ssl |
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* |
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* @return boolean|null |
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*/ |
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public function getSsl() |
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{ |
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return $this->ssl; |
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} |
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/** |
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* Get the current request |
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* |
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* @return \stdClass|null |
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*/ |
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public function getRequest() |
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{ |
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return $this->request; |
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} |
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/** |
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* Get the information from the $_SERVER array if the key exist. |
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* If not exist, return an exception. |
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* |
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* @param string $keyName The key's value in $_SERVER array |
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* |
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* @return string |
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* |
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* @throws \Exception If the key not exist into $_SERVER |
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*/ |
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public static function getServerValue(string $keyName): string |
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{ |
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if (!isset($_SERVER[$keyName])) { |
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throw new \Exception( |
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'The key '.$keyName.' not exist into $_SERVER array', |
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self::ERR_KEY_NOT_EXIST |
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); |
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} |
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return $_SERVER[$keyName]; |
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} |
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/** |
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* Get the information from the $_SERVER array if the key exist. |
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* If not exist, return a empty string. |
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* |
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* @param string $keyName The key's value in $_SERVER array |
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* |
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* @return string |
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*/ |
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protected function serverValue(string $keyName): string |
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{ |
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$calledClass = get_called_class(); //Autorize extends this class |
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try { |
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return $calledClass::getServerValue($keyName); |
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} catch (\Exception $e) { |
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return ''; |
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} |
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} |
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/** |
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* Run all detect method |
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* |
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* @return void |
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*/ |
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public function runDetect() |
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{ |
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$this->detectIp(); |
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$this->detectLang(); |
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$this->detectReferer(); |
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$this->detectMethod(); |
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$this->detectSsl(); |
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$this->detectRequest(); |
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} |
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/** |
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* Detect the client IP |
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* |
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* @return void |
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*/ |
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protected function detectIp() |
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{ |
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$this->ip = $this->serverValue('REMOTE_ADDR'); |
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} |
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/** |
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* Detect the primary client's language |
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* |
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* @return void |
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*/ |
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protected function detectLang() |
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{ |
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/* |
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* HTTP_ACCEPT_LANGUAGE -> fr-FR,fr;q=0.8,en-US;q=0.6,en;q=0.4 |
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* First "fr-FR" (preference 1/1) |
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* After in the order, "fr" (preference 0.8 / 1) |
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* Next "en-US" (preference 0.6/1) |
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* End "en" (preference 0.4/1) |
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**/ |
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$acceptLanguage = $this->serverValue('HTTP_ACCEPT_LANGUAGE'); |
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if (empty($acceptLanguage)) { |
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$this->lang = ''; |
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return; |
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} |
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$acceptedLangs = explode(',', $acceptLanguage); |
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$firstLang = explode(';', $acceptedLangs[0]); |
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$lang = strtolower($firstLang[0]); |
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if (strpos($lang, '-') !== false) { |
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$minLang = explode('-', $lang); |
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$lang = $minLang[0]; |
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} |
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$this->lang = $lang; |
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} |
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/** |
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* Detect the referer page |
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* |
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* @return void |
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*/ |
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protected function detectReferer() |
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{ |
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$this->referer = $this->serverValue('HTTP_REFERER'); |
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} |
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/** |
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* Detect the http method |
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* |
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* @return void |
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*/ |
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protected function detectMethod() |
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{ |
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$this->method = $this->serverValue('REQUEST_METHOD'); |
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} |
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/** |
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* Detect if the request is with ssl (https) |
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* |
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* @return void |
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*/ |
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protected function detectSsl() |
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{ |
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$serverHttps = $this->serverValue('HTTPS'); |
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$fwdProto = $this->serverValue('HTTP_X_FORWARDED_PROTO'); |
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$fwdSsl = $this->serverValue('HTTP_X_FORWARDED_SSL'); |
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$this->ssl = false; |
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if (!empty($serverHttps) && $serverHttps !== 'off') { |
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$this->ssl = true; |
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} elseif (!empty($fwdProto) && $fwdProto === 'https') { |
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$this->ssl = true; |
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} elseif (!empty($fwdSsl) && $fwdSsl === 'on') { |
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$this->ssl = true; |
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} |
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} |
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/** |
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* Detect the current request informations |
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* |
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* @return void |
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*/ |
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protected function detectRequest() |
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{ |
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$parseUrl = parse_url($this->serverValue('REQUEST_URI')); |
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$scheme = ($this->ssl === true) ? 'https' : 'http'; |
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$request = [ |
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'scheme' => $scheme, |
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'host' => $this->serverValue('HTTP_HOST'), |
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'port' => $this->serverValue('SERVER_PORT'), |
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'user' => $this->serverValue('PHP_AUTH_USER'), |
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'pass' => $this->serverValue('PHP_AUTH_PW'), |
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'path' => '', |
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'query' => '', |
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'fragment' => '', |
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]; |
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//Keep auto-convert to object. Less complexity for merge with array. |
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$this->request = (object) array_merge($request, $parseUrl); |
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} |
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} |
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