* @since 2.0 */ class Request extends \yii\base\Request { /** * @var boolean whether to enable CSRF (Cross-Site Request Forgery) validation. Defaults to false. * By setting this property to true, forms submitted to an Yii Web application must be originated * from the same application. If not, a 400 HTTP exception will be raised. * * Note, this feature requires that the user client accepts cookie. Also, to use this feature, * forms submitted via POST method must contain a hidden input whose name is specified by [[csrfTokenName]]. * You may use [[\yii\web\Html::beginForm()]] to generate his hidden input. * @see http://en.wikipedia.org/wiki/Cross-site_request_forgery */ public $enableCsrfValidation = false; /** * @var string the name of the token used to prevent CSRF. Defaults to 'YII_CSRF_TOKEN'. * This property is effectively only when {@link enableCsrfValidation} is true. */ public $csrfTokenName = '_csrf'; /** * @var array the configuration of the CSRF cookie. This property is used only when [[enableCsrfValidation]] is true. * @see Cookie */ public $csrfCookie = array('httpOnly' => true); /** * @var boolean whether cookies should be validated to ensure they are not tampered. Defaults to true. */ public $enableCookieValidation = true; /** * @var string|boolean the name of the POST parameter that is used to indicate if a request is a PUT or DELETE * request tunneled through POST. Default to '_method'. * @see getMethod * @see getRestParams */ public $restVar = '_method'; private $_cookies; /** * Resolves the current request into a route and the associated parameters. * @return array the first element is the route, and the second is the associated parameters. * @throws HttpException if the request cannot be resolved. */ public function resolve() { $this->validateCsrfToken(); $result = Yii::$app->getUrlManager()->parseRequest($this); if ($result !== false) { list ($route, $params) = $result; $_GET = array_merge($_GET, $params); return array($route, $_GET); } else { throw new HttpException(404, Yii::t('yii', 'Page not found.')); } } /** * Returns the method of the current request (e.g. GET, POST, HEAD, PUT, DELETE). * @return string request method, such as GET, POST, HEAD, PUT, DELETE. * The value returned is turned into upper case. */ public function getMethod() { if (isset($_POST[$this->restVar])) { return strtoupper($_POST[$this->restVar]); } else { return isset($_SERVER['REQUEST_METHOD']) ? strtoupper($_SERVER['REQUEST_METHOD']) : 'GET'; } } /** * Returns whether this is a POST request. * @return boolean whether this is a POST request. */ public function getIsPost() { return $this->getMethod() === 'POST'; } /** * Returns whether this is a DELETE request. * @return boolean whether this is a DELETE request. */ public function getIsDelete() { return $this->getMethod() === 'DELETE'; } /** * Returns whether this is a PUT request. * @return boolean whether this is a PUT request. */ public function getIsPut() { return $this->getMethod() === 'PUT'; } /** * Returns whether this is an AJAX (XMLHttpRequest) request. * @return boolean whether this is an AJAX (XMLHttpRequest) request. */ public function getIsAjax() { return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] === 'XMLHttpRequest'; } /** * Returns whether this is an Adobe Flash or Flex request. * @return boolean whether this is an Adobe Flash or Adobe Flex request. */ public function getIsFlash() { return isset($_SERVER['HTTP_USER_AGENT']) && (stripos($_SERVER['HTTP_USER_AGENT'], 'Shockwave') !== false || stripos($_SERVER['HTTP_USER_AGENT'], 'Flash') !== false); } private $_restParams; /** * Returns the request parameters for the RESTful request. * @return array the RESTful request parameters * @see getMethod */ public function getRestParams() { if ($this->_restParams === null) { if (isset($_POST[$this->restVar])) { $this->_restParams = $_POST; } else { $this->_restParams = array(); if (function_exists('mb_parse_str')) { mb_parse_str($this->getRawBody(), $this->_restParams); } else { parse_str($this->getRawBody(), $this->_restParams); } } } return $this->_restParams; } private $_rawBody; /** * Returns the raw HTTP request body. * @return string the request body */ public function getRawBody() { if ($this->_rawBody === null) { $this->_rawBody = file_get_contents('php://input'); } return $this->_rawBody; } /** * Sets the RESTful parameters. * @param array $values the RESTful parameters (name-value pairs) */ public function setRestParams($values) { $this->_restParams = $values; } /** * Returns the named RESTful parameter value. * @param string $name the parameter name * @param mixed $defaultValue the default parameter value if the parameter does not exist. * @return mixed the parameter value */ public function getRestParam($name, $defaultValue = null) { $params = $this->getRestParams(); return isset($params[$name]) ? $params[$name] : $defaultValue; } /** * Returns the named GET parameter value. * If the GET parameter does not exist, the second parameter to this method will be returned. * @param string $name the GET parameter name * @param mixed $defaultValue the default parameter value if the GET parameter does not exist. * @return mixed the GET parameter value * @see getPost */ public function get($name, $defaultValue = null) { return isset($_GET[$name]) ? $_GET[$name] : $defaultValue; } /** * Returns the named POST parameter value. * If the POST parameter does not exist, the second parameter to this method will be returned. * @param string $name the POST parameter name * @param mixed $defaultValue the default parameter value if the POST parameter does not exist. * @return mixed the POST parameter value * @see getParam */ public function getPost($name, $defaultValue = null) { return isset($_POST[$name]) ? $_POST[$name] : $defaultValue; } /** * Returns the named DELETE parameter value. * @param string $name the DELETE parameter name * @param mixed $defaultValue the default parameter value if the DELETE parameter does not exist. * @return mixed the DELETE parameter value */ public function getDelete($name, $defaultValue = null) { return $this->getIsDelete() ? $this->getRestParam($name, $defaultValue) : null; } /** * Returns the named PUT parameter value. * @param string $name the PUT parameter name * @param mixed $defaultValue the default parameter value if the PUT parameter does not exist. * @return mixed the PUT parameter value */ public function getPut($name, $defaultValue = null) { return $this->getIsPut() ? $this->getRestParam($name, $defaultValue) : null; } private $_hostInfo; /** * Returns the schema and host part of the current request URL. * The returned URL does not have an ending slash. * By default this is determined based on the user request information. * You may explicitly specify it by setting the [[setHostInfo()|hostInfo]] property. * @return string schema and hostname part (with port number if needed) of the request URL (e.g. `http://www.yiiframework.com`) * @see setHostInfo */ public function getHostInfo() { if ($this->_hostInfo === null) { $secure = $this->getIsSecureConnection(); $http = $secure ? 'https' : 'http'; if (isset($_SERVER['HTTP_HOST'])) { $this->_hostInfo = $http . '://' . $_SERVER['HTTP_HOST']; } else { $this->_hostInfo = $http . '://' . $_SERVER['SERVER_NAME']; $port = $secure ? $this->getSecurePort() : $this->getPort(); if (($port !== 80 && !$secure) || ($port !== 443 && $secure)) { $this->_hostInfo .= ':' . $port; } } } return $this->_hostInfo; } /** * Sets the schema and host part of the application URL. * This setter is provided in case the schema and hostname cannot be determined * on certain Web servers. * @param string $value the schema and host part of the application URL. The trailing slashes will be removed. */ public function setHostInfo($value) { $this->_hostInfo = rtrim($value, '/'); } private $_baseUrl; /** * Returns the relative URL for the application. * This is similar to [[scriptUrl]] except that it does not include the script file name, * and the ending slashes are removed. * @return string the relative URL for the application * @see setScriptUrl */ public function getBaseUrl() { if ($this->_baseUrl === null) { $this->_baseUrl = rtrim(dirname($this->getScriptUrl()), '\\/'); } return $this->_baseUrl; } /** * Sets the relative URL for the application. * By default the URL is determined based on the entry script URL. * This setter is provided in case you want to change this behavior. * @param string $value the relative URL for the application */ public function setBaseUrl($value) { $this->_baseUrl = $value; } private $_scriptUrl; /** * Returns the relative URL of the entry script. * The implementation of this method referenced Zend_Controller_Request_Http in Zend Framework. * @return string the relative URL of the entry script. * @throws InvalidConfigException if unable to determine the entry script URL */ public function getScriptUrl() { if ($this->_scriptUrl === null) { $scriptFile = $this->getScriptFile(); $scriptName = basename($scriptFile); if (basename($_SERVER['SCRIPT_NAME']) === $scriptName) { $this->_scriptUrl = $_SERVER['SCRIPT_NAME']; } elseif (basename($_SERVER['PHP_SELF']) === $scriptName) { $this->_scriptUrl = $_SERVER['PHP_SELF']; } elseif (isset($_SERVER['ORIG_SCRIPT_NAME']) && basename($_SERVER['ORIG_SCRIPT_NAME']) === $scriptName) { $this->_scriptUrl = $_SERVER['ORIG_SCRIPT_NAME']; } elseif (($pos = strpos($_SERVER['PHP_SELF'], '/' . $scriptName)) !== false) { $this->_scriptUrl = substr($_SERVER['SCRIPT_NAME'], 0, $pos) . '/' . $scriptName; } elseif (isset($_SERVER['DOCUMENT_ROOT']) && strpos($scriptFile, $_SERVER['DOCUMENT_ROOT']) === 0) { $this->_scriptUrl = str_replace('\\', '/', str_replace($_SERVER['DOCUMENT_ROOT'], '', $scriptFile)); } else { throw new InvalidConfigException('Unable to determine the entry script URL.'); } } return $this->_scriptUrl; } /** * Sets the relative URL for the application entry script. * This setter is provided in case the entry script URL cannot be determined * on certain Web servers. * @param string $value the relative URL for the application entry script. */ public function setScriptUrl($value) { $this->_scriptUrl = '/' . trim($value, '/'); } private $_scriptFile; /** * Returns the entry script file path. * The default implementation will simply return `$_SERVER['SCRIPT_FILENAME']`. * @return string the entry script file path */ public function getScriptFile() { return isset($this->_scriptFile) ? $this->_scriptFile : $_SERVER['SCRIPT_FILENAME']; } /** * Sets the entry script file path. * The entry script file path normally can be obtained from `$_SERVER['SCRIPT_FILENAME']`. * If your server configuration does not return the correct value, you may configure * this property to make it right. * @param string $value the entry script file path. */ public function setScriptFile($value) { $this->_scriptFile = $value; } private $_pathInfo; /** * Returns the path info of the currently requested URL. * A path info refers to the part that is after the entry script and before the question mark (query string). * The starting and ending slashes are both removed. * @return string part of the request URL that is after the entry script and before the question mark. * Note, the returned path info is already URL-decoded. * @throws InvalidConfigException if the path info cannot be determined due to unexpected server configuration */ public function getPathInfo() { if ($this->_pathInfo === null) { $this->_pathInfo = $this->resolvePathInfo(); } return $this->_pathInfo; } /** * Sets the path info of the current request. * This method is mainly provided for testing purpose. * @param string $value the path info of the current request */ public function setPathInfo($value) { $this->_pathInfo = trim($value, '/'); } /** * Resolves the path info part of the currently requested URL. * A path info refers to the part that is after the entry script and before the question mark (query string). * The starting and ending slashes are both removed. * @return string part of the request URL that is after the entry script and before the question mark. * Note, the returned path info is decoded. * @throws InvalidConfigException if the path info cannot be determined due to unexpected server configuration */ protected function resolvePathInfo() { $pathInfo = $this->getUrl(); if (($pos = strpos($pathInfo, '?')) !== false) { $pathInfo = substr($pathInfo, 0, $pos); } $pathInfo = urldecode($pathInfo); // try to encode in UTF8 if not so // http://w3.org/International/questions/qa-forms-utf-8.html if (!preg_match('%^(?: [\x09\x0A\x0D\x20-\x7E] # ASCII | [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte | \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs | [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte | \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates | \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3 | [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15 | \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16 )*$%xs', $pathInfo)) { $pathInfo = utf8_encode($pathInfo); } $scriptUrl = $this->getScriptUrl(); $baseUrl = $this->getBaseUrl(); if (strpos($pathInfo, $scriptUrl) === 0) { $pathInfo = substr($pathInfo, strlen($scriptUrl)); } elseif ($baseUrl === '' || strpos($pathInfo, $baseUrl) === 0) { $pathInfo = substr($pathInfo, strlen($baseUrl)); } elseif (strpos($_SERVER['PHP_SELF'], $scriptUrl) === 0) { $pathInfo = substr($_SERVER['PHP_SELF'], strlen($scriptUrl)); } else { throw new InvalidConfigException('Unable to determine the path info of the current request.'); } return trim($pathInfo, '/'); } /** * Returns the currently requested absolute URL. * This is a shortcut to the concatenation of [[hostInfo]] and [[url]]. * @return string the currently requested absolute URL. */ public function getAbsoluteUrl() { return $this->getHostInfo() . $this->getUrl(); } private $_url; /** * Returns the currently requested relative URL. * This refers to the portion of the URL that is after the [[hostInfo]] part. * It includes the [[queryString]] part if any. * @return string the currently requested relative URL. Note that the URI returned is URL-encoded. * @throws InvalidConfigException if the URL cannot be determined due to unusual server configuration */ public function getUrl() { if ($this->_url === null) { $this->_url = $this->resolveRequestUri(); } return $this->_url; } /** * Sets the currently requested relative URL. * The URI must refer to the portion that is after [[hostInfo]]. * Note that the URI should be URL-encoded. * @param string $value the request URI to be set */ public function setUrl($value) { $this->_url = $value; } /** * Resolves the request URI portion for the currently requested URL. * This refers to the portion that is after the [[hostInfo]] part. It includes the [[queryString]] part if any. * The implementation of this method referenced Zend_Controller_Request_Http in Zend Framework. * @return string|boolean the request URI portion for the currently requested URL. * Note that the URI returned is URL-encoded. * @throws InvalidConfigException if the request URI cannot be determined due to unusual server configuration */ protected function resolveRequestUri() { if (isset($_SERVER['HTTP_X_REWRITE_URL'])) { // IIS $requestUri = $_SERVER['HTTP_X_REWRITE_URL']; } elseif (isset($_SERVER['REQUEST_URI'])) { $requestUri = $_SERVER['REQUEST_URI']; if ($requestUri !== '' && $requestUri[0] !== '/') { $requestUri = preg_replace('/^(http|https):\/\/[^\/]+/i', '', $requestUri); } } elseif (isset($_SERVER['ORIG_PATH_INFO'])) { // IIS 5.0 CGI $requestUri = $_SERVER['ORIG_PATH_INFO']; if (!empty($_SERVER['QUERY_STRING'])) { $requestUri .= '?' . $_SERVER['QUERY_STRING']; } } else { throw new InvalidConfigException('Unable to determine the request URI.'); } return $requestUri; } /** * Returns part of the request URL that is after the question mark. * @return string part of the request URL that is after the question mark */ public function getQueryString() { return isset($_SERVER['QUERY_STRING']) ? $_SERVER['QUERY_STRING'] : ''; } /** * Return if the request is sent via secure channel (https). * @return boolean if the request is sent via secure channel (https) */ public function getIsSecureConnection() { return isset($_SERVER['HTTPS']) && ($_SERVER['HTTPS'] === 'on' || $_SERVER['HTTPS'] == 1) || isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https'; } /** * Returns the server name. * @return string server name */ public function getServerName() { return $_SERVER['SERVER_NAME']; } /** * Returns the server port number. * @return integer server port number */ public function getServerPort() { return (int)$_SERVER['SERVER_PORT']; } /** * Returns the URL referrer, null if not present * @return string URL referrer, null if not present */ public function getReferrer() { return isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : null; } /** * Returns the user agent, null if not present. * @return string user agent, null if not present */ public function getUserAgent() { return isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : null; } /** * Returns the user IP address. * @return string user IP address */ public function getUserIP() { return isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : '127.0.0.1'; } /** * Returns the user host name, null if it cannot be determined. * @return string user host name, null if cannot be determined */ public function getUserHost() { return isset($_SERVER['REMOTE_HOST']) ? $_SERVER['REMOTE_HOST'] : null; } /** * Returns user browser accept types, null if not present. * @return string user browser accept types, null if not present */ public function getAcceptTypes() { return isset($_SERVER['HTTP_ACCEPT']) ? $_SERVER['HTTP_ACCEPT'] : null; } private $_port; /** * Returns the port to use for insecure requests. * Defaults to 80, or the port specified by the server if the current * request is insecure. * @return integer port number for insecure requests. * @see setPort */ public function getPort() { if ($this->_port === null) { $this->_port = !$this->getIsSecureConnection() && isset($_SERVER['SERVER_PORT']) ? (int)$_SERVER['SERVER_PORT'] : 80; } return $this->_port; } /** * Sets the port to use for insecure requests. * This setter is provided in case a custom port is necessary for certain * server configurations. * @param integer $value port number. */ public function setPort($value) { if ($value != $this->_port) { $this->_port = (int)$value; $this->_hostInfo = null; } } private $_securePort; /** * Returns the port to use for secure requests. * Defaults to 443, or the port specified by the server if the current * request is secure. * @return integer port number for secure requests. * @see setSecurePort */ public function getSecurePort() { if ($this->_securePort === null) { $this->_securePort = $this->getIsSecureConnection() && isset($_SERVER['SERVER_PORT']) ? (int)$_SERVER['SERVER_PORT'] : 443; } return $this->_securePort; } /** * Sets the port to use for secure requests. * This setter is provided in case a custom port is necessary for certain * server configurations. * @param integer $value port number. */ public function setSecurePort($value) { if ($value != $this->_securePort) { $this->_securePort = (int)$value; $this->_hostInfo = null; } } private $_contentTypes; /** * Returns the content types accepted by the end user. * This is determined by the `Accept` HTTP header. * @return array the content types ordered by the preference level. The first element * represents the most preferred content type. */ public function getAcceptedContentTypes() { if ($this->_contentTypes === null) { if (isset($_SERVER['HTTP_ACCEPT'])) { $this->_contentTypes = $this->parseAcceptHeader($_SERVER['HTTP_ACCEPT']); } else { $this->_contentTypes = array(); } } return $this->_contentTypes; } /** * @param array $value the content types that are accepted by the end user. They should * be ordered by the preference level. */ public function setAcceptedContentTypes($value) { $this->_contentTypes = $value; } private $_languages; /** * Returns the languages accepted by the end user. * This is determined by the `Accept-Language` HTTP header. * @return array the languages ordered by the preference level. The first element * represents the most preferred language. */ public function getAcceptedLanguages() { if ($this->_languages === null) { if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) { $this->_languages = $this->parseAcceptHeader($_SERVER['HTTP_ACCEPT_LANGUAGE']); } else { $this->_languages = array(); } } return $this->_languages; } /** * @param array $value the languages that are accepted by the end user. They should * be ordered by the preference level. */ public function setAcceptedLanguages($value) { $this->_languages = $value; } /** * Parses the given `Accept` (or `Accept-Language`) header. * This method will return the accepted values ordered by their preference level. * @param string $header the header to be parsed * @return array the accept values ordered by their preference level. */ protected function parseAcceptHeader($header) { $accepts = array(); $n = preg_match_all('/\s*([\w\/\-\*]+)\s*(?:;\s*q\s*=\s*([\d\.]+))?[^,]*/', $header, $matches, PREG_SET_ORDER); for ($i = 0; $i < $n; ++$i) { if (!empty($matches[$i][1])) { $accepts[] = array($matches[$i][1], isset($matches[$i][2]) ? (float)$matches[$i][2] : 1, $i); } } usort($accepts, function ($a, $b) { if ($a[1] > $b[1]) { return -1; } elseif ($a[1] < $b[1]) { return 1; } elseif ($a[0] === $b[0]) { return $a[2] > $b[2] ? 1 : -1; } elseif ($a[0] === '*/*') { return 1; } elseif ($b[0] === '*/*') { return -1; } else { $wa = $a[0][strlen($a[0]) - 1] === '*'; $wb = $b[0][strlen($b[0]) - 1] === '*'; if ($wa xor $wb) { return $wa ? 1 : -1; } else { return $a[2] > $b[2] ? 1 : -1; } } }); $result = array(); foreach ($accepts as $accept) { $result[] = $accept[0]; } return array_unique($result); } /** * Returns the user-preferred language that should be used by this application. * The language resolution is based on the user preferred languages and the languages * supported by the application. The method will try to find the best match. * @param array $languages a list of the languages supported by the application. * If empty, this method will return the first language returned by [[getAcceptedLanguages()]]. * @return string the language that the application should use. Null is returned if both [[getAcceptedLanguages()]] * and `$languages` are empty. */ public function getPreferredLanguage($languages = array()) { $acceptedLanguages = $this->getAcceptedLanguages(); if (empty($languages)) { return isset($acceptedLanguages[0]) ? $acceptedLanguages[0] : null; } foreach ($acceptedLanguages as $acceptedLanguage) { $acceptedLanguage = str_replace('-', '_', strtolower($acceptedLanguage)); foreach ($languages as $language) { $language = str_replace('-', '_', strtolower($language)); // en_us==en_us, en==en_us, en_us==en if ($language === $acceptedLanguage || strpos($acceptedLanguage, $language . '_') === 0 || strpos($language, $acceptedLanguage . '_') === 0) { return $language; } } } return reset($languages); } /** * Returns the cookie collection. * Through the returned cookie collection, you may access a cookie using the following syntax: * * ~~~ * $cookie = $request->cookies['name'] * if ($cookie !== null) { * $value = $cookie->value; * } * * // alternatively * $value = $request->cookies->getValue('name'); * ~~~ * * @return CookieCollection the cookie collection. */ public function getCookies() { if ($this->_cookies === null) { $this->_cookies = new CookieCollection($this->loadCookies(), array( 'readOnly' => true, )); } return $this->_cookies; } /** * Converts `$_COOKIE` into an array of [[Cookie]]. * @return array the cookies obtained from request */ protected function loadCookies() { $cookies = array(); if ($this->enableCookieValidation) { $key = $this->getCookieValidationKey(); foreach ($_COOKIE as $name => $value) { if (is_string($value) && ($value = SecurityHelper::validateData($value, $key)) !== false) { $cookies[$name] = new Cookie(array( 'name' => $name, 'value' => @unserialize($value), )); } } } else { foreach ($_COOKIE as $name => $value) { $cookies[$name] = new Cookie(array( 'name' => $name, 'value' => $value, )); } } return $cookies; } private $_cookieValidationKey; /** * @return string the secret key used for cookie validation. If it was set previously, * a random key will be generated and used. */ public function getCookieValidationKey() { if ($this->_cookieValidationKey === null) { $this->_cookieValidationKey = SecurityHelper::getSecretKey(__CLASS__ . '/' . Yii::$app->id); } return $this->_cookieValidationKey; } /** * Sets the secret key used for cookie validation. * @param string $value the secret key used for cookie validation. */ public function setCookieValidationKey($value) { $this->_cookieValidationKey = $value; } /** * @var Cookie */ private $_csrfCookie; /** * Returns the random token used to perform CSRF validation. * The token will be read from cookie first. If not found, a new token will be generated. * @return string the random token for CSRF validation. * @see enableCsrfValidation */ public function getCsrfToken() { if ($this->_csrfCookie === null) { $this->_csrfCookie = $this->getCookies()->get($this->csrfTokenName); if ($this->_csrfCookie === null) { $this->_csrfCookie = $this->createCsrfCookie(); Yii::$app->getResponse()->getCookies()->add($this->_csrfCookie); } } return $this->_csrfCookie->value; } /** * Creates a cookie with a randomly generated CSRF token. * Initial values specified in [[csrfCookie]] will be applied to the generated cookie. * @return Cookie the generated cookie * @see enableCsrfValidation */ protected function createCsrfCookie() { $options = $this->csrfCookie; $options['name'] = $this->csrfTokenName; $options['value'] = sha1(uniqid(mt_rand(), true)); return new Cookie($options); } /** * Performs the CSRF validation. * The method will compare the CSRF token obtained from a cookie and from a POST field. * If they are different, a CSRF attack is detected and a 400 HTTP exception will be raised. * @throws HttpException if the validation fails */ public function validateCsrfToken() { if (!$this->enableCsrfValidation) { return; } $method = $this->getMethod(); if ($method === 'POST' || $method === 'PUT' || $method === 'DELETE') { $cookies = $this->getCookies(); switch ($method) { case 'POST': $token = $this->getPost($this->csrfTokenName); break; case 'PUT': $token = $this->getPut($this->csrfTokenName); break; case 'DELETE': $token = $this->getDelete($this->csrfTokenName); } if (empty($token) || $cookies->getValue($this->csrfTokenName) !== $token) { throw new HttpException(400, Yii::t('yii', 'Unable to verify your data submission.')); } } } }