Yii2 Bootstrap 3
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<?php
/**
* Request class file.
*
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\web;
use \yii\base\InvalidConfigException;
/**
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class Request extends \yii\base\Request
{
/**
* @var boolean whether cookies should be validated to ensure they are not tampered. Defaults to false.
*/
public $enableCookieValidation = false;
/**
* @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.
* You also need to use {@link CHtml::form} or {@link CHtml::statefulForm} to generate
* the needed HTML forms in your pages.
* @see http://seclab.stanford.edu/websec/csrf/csrf.pdf
*/
public $enableCsrfValidation = false;
/**
* @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. If false, it means disabling REST request tunneled through POST.
* Default to '_method'.
* @see getRequestMethod
* @see getRestParams
*/
public $restPostVar = '_method';
/**
* @var string the name of the token used to prevent CSRF. Defaults to 'YII_CSRF_TOKEN'.
* This property is effective only when {@link enableCsrfValidation} is true.
*/
public $csrfTokenName = 'YII_CSRF_TOKEN';
/**
* @var array the property values (in name-value pairs) used to initialize the CSRF cookie.
* Any property of {@link CHttpCookie} may be initialized.
* This property is effective only when {@link enableCsrfValidation} is true.
*/
public $csrfCookie;
private $_cookies;
/**
* Initializes the application component.
* This method overrides the parent implementation by preprocessing
* the user request data.
*/
public function init()
{
parent::init();
$this->normalizeRequest();
}
/**
* Normalizes the request data.
* This method strips off slashes in request data if get_magic_quotes_gpc() returns true.
* It also performs CSRF validation if {@link enableCsrfValidation} is true.
*/
protected function normalizeRequest()
{
if (get_magic_quotes_gpc()) {
if (isset($_GET)) {
$_GET = $this->stripSlashes($_GET);
}
if (isset($_POST)) {
$_POST = $this->stripSlashes($_POST);
}
if (isset($_REQUEST)) {
$_REQUEST = $this->stripSlashes($_REQUEST);
}
if (isset($_COOKIE)) {
$_COOKIE = $this->stripSlashes($_COOKIE);
}
}
if ($this->enableCsrfValidation) {
\Yii::$app->on('beginRequest', array($this, 'validateCsrfToken'));
}
}
/**
* Strips slashes from input data.
* This method is applied when magic quotes is enabled.
* @param mixed $data input data to be processed
* @return mixed processed data
*/
public function stripSlashes($data)
{
return is_array($data) ? array_map(array($this, 'stripSlashes'), $data) : stripslashes($data);
}
/**
* 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 getRequestMethod()
{
if ($this->restPostVar !== false && isset($_POST[$this->restPostVar])) {
return strtoupper($_POST[$this->restPostVar]);
} else {
return isset($_SERVER['REQUEST_METHOD']) ? strtoupper($_SERVER['REQUEST_METHOD']) : 'GET';
}
}
/**
* Returns whether this is a POST request.
* @return boolean whether this is a POST request.
*/
public function getIsPostRequest()
{
return isset($_SERVER['REQUEST_METHOD']) && !strcasecmp($_SERVER['REQUEST_METHOD'], 'POST');
}
/**
* Returns whether this is a DELETE request.
* @return boolean whether this is a DELETE request.
*/
public function getIsDeleteRequest()
{
return $this->getRequestMethod() === 'DELETE';
}
/**
* Returns whether this is a PUT request.
* @return boolean whether this is a PUT request.
*/
public function getIsPutRequest()
{
return $this->getRequestMethod() === 'PUT';
}
/**
* Returns whether this is an AJAX (XMLHttpRequest) request.
* @return boolean whether this is an AJAX (XMLHttpRequest) request.
*/
public function getIsAjaxRequest()
{
return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] === 'XMLHttpRequest';
}
/**
* Returns whether this is an Adobe Flash or Adobe Flex request.
* @return boolean whether this is an Adobe Flash or Adobe Flex request.
*/
public function getIsFlashRequest()
{
return isset($_SERVER['HTTP_USER_AGENT']) &&
(stripos($_SERVER['HTTP_USER_AGENT'], 'Shockwave') !== false || stripos($_SERVER['HTTP_USER_AGENT'], 'Flash') !== false);
}
private $_restParams;
/**
* Returns the request parameters for the RESTful request.
* @return array the RESTful request parameters
* @see getRequestMethod
*/
public function getRestParams()
{
if ($this->_restParams === null) {
if ($this->restPostVar !== false && isset($_POST[$this->restPostVar])) {
$this->_restParams = $_POST;
} else {
$this->_restParams = array();
if (function_exists('mb_parse_str')) {
mb_parse_str(file_get_contents('php://input'), $this->_restParams);
} else {
parse_str(file_get_contents('php://input'), $this->_restParams);
}
}
}
return $this->_restParams;
}
/**
* Sets the RESTful parameters.
* @param array $values the RESTful parameters (name-value pairs)
*/
public function setRestParams($values)
{
$this->_restParams = $values;
}
/**
* Returns the named GET or POST parameter value.
* If the GET or POST parameter does not exist, the second parameter to this method will be returned.
* If both GET and POST contains such a named parameter, the GET parameter takes precedence.
* @param string $name the GET parameter name
* @param mixed $defaultValue the default parameter value if the GET parameter does not exist.
* @return mixed the GET parameter value
* @see getQuery
* @see getPost
*/
public function getParam($name, $defaultValue = null)
{
return isset($_GET[$name]) ? $_GET[$name] : (isset($_POST[$name]) ? $_POST[$name] : $defaultValue);
}
/**
* 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 $defaultValue the default parameter value if the GET parameter does not exist.
* @return mixed the GET parameter value
* @see getPost
* @see getParam
*/
public function getQuery($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 $defaultValue the default parameter value if the POST parameter does not exist.
* @return mixed the POST parameter value
* @see getParam
* @see getQuery
*/
public function getPost($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->getIsDeleteRequest() ? $this->getRestParam($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->getIsPutRequest() ? $this->getRestParam($name, $defaultValue) : null;
}
/**
* Returns the currently requested URL.
* This is the same as [[requestUri]].
* @return string part of the request URL after the host info.
*/
public function getUrl()
{
return $this->getRequestUri();
}
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) {
$scriptName = basename($_SERVER['SCRIPT_FILENAME']);
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($_SERVER['SCRIPT_FILENAME'], $_SERVER['DOCUMENT_ROOT']) === 0) {
$this->_scriptUrl = str_replace('\\', '/', str_replace($_SERVER['DOCUMENT_ROOT'], '', $_SERVER['SCRIPT_FILENAME']));
} 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 $_pathInfo;
/**
* Returns the path info of the currently requested URL.
* A path info refers to the part that is after the entry script and before the question mark (query string).
* The starting and ending slashes are both removed.
* @return string part of the request URL that is after the entry script and before the question mark.
* Note, the returned path info is decoded.
* @throws InvalidConfigException if the path info cannot be determined due to unexpected server configuration
*/
public function getPathInfo()
{
if ($this->_pathInfo === null) {
$this->_pathInfo = $this->resolvePathInfo();
}
return $this->_pathInfo;
}
/**
* 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 = $this->getRequestUri();
if (($pos = strpos($pathInfo, '?')) !== false) {
$pathInfo = substr($pathInfo, 0, $pos);
}
$pathInfo = $this->decodeUrl($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($scriptUrl));
} else {
return false;
}
return trim($pathInfo, '/');
}
/**
* Decodes the given URL.
* This method is an improved variant of the native urldecode() function. It will properly encode
* UTF-8 characters which may be returned by urldecode().
* @param string $url encoded URL
* @return string decoded URL
*/
public function decodeUrl($url)
{
$url = urldecode($url);
// is it UTF-8?
// 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', $url)) {
return $url;
} else {
return utf8_encode($url);
}
}
private $_requestUri;
/**
* Returns the request URI portion for the currently requested URL.
* This refers to the portion that is after the [[hostInfo]] part. It includes the [[queryString]] part if any.
* The implementation of this method referenced Zend_Controller_Request_Http in Zend Framework.
* @return string the request URI portion for the currently requested URL.
* Note that the URI returned is URL-encoded.
* @throws InvalidConfigException if the request URI cannot be determined due to unusual server configuration
*/
public function getRequestUri()
{
if ($this->_requestUri === null) {
$this->_requestUri = $this->resolveRequestUri();
}
return $this->_requestUri;
}
/**
* Resolves the request URI portion for the currently requested URL.
* This refers to the portion that is after the [[hostInfo]] part. It includes the [[queryString]] part if any.
* The implementation of this method referenced Zend_Controller_Request_Http in Zend Framework.
* @return string|boolean the request URI portion for the currently requested URL.
* Note that the URI returned is URL-encoded.
* @throws InvalidConfigException if the request URI cannot be determined due to unusual server configuration
*/
protected function resolveRequestUri()
{
if (isset($_SERVER['HTTP_X_REWRITE_URL'])) { // IIS
$requestUri = $_SERVER['HTTP_X_REWRITE_URL'];
} elseif (isset($_SERVER['REQUEST_URI'])) {
$requestUri = $_SERVER['REQUEST_URI'];
if (!empty($_SERVER['HTTP_HOST'])) {
if (strpos($requestUri, $_SERVER['HTTP_HOST']) !== false) {
$requestUri = preg_replace('/^\w+:\/\/[^\/]+/', '', $requestUri);
}
} else {
$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']) ? $_SERVER['QUERY_STRING'] : '';
}
/**
* Return if the request is sent via secure channel (https).
* @return boolean if the request is sent via secure channel (https)
*/
public function getIsSecureConnection()
{
return !empty($_SERVER['HTTPS']) && strcasecmp($_SERVER['HTTPS'], 'off');
}
/**
* 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']) ? $_SERVER['HTTP_USER_AGENT'] : null;
}
/**
* Returns the user IP address.
* @return string user IP address
*/
public function getUserHostAddress()
{
return isset($_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;
}
private $_scriptFile;
/**
* Returns entry script file path.
* @return string entry script file path (processed w/ realpath())
* @throws InvalidConfigException if the entry script file path cannot be determined automatically.
*/
public function getScriptFile()
{
if ($this->_scriptFile === null) {
$this->setScriptFile($_SERVER['SCRIPT_FILENAME']);
}
return $this->_scriptFile;
}
/**
* Sets the entry script file path.
* The entry script file path can normally be determined based on the `SCRIPT_FILENAME` SERVER variable.
* However, in some server configuration, this may not be correct or feasible.
* This setter is provided so that the entry script file path can be manually specified.
* @param string $value the entry script file path
* @throws InvalidConfigException if the provided entry script file path is invalid.
*/
public function setScriptFile($value)
{
$this->_scriptFile = realpath($value);
if ($this->_scriptFile === false || !is_file($this->_scriptFile)) {
throw new InvalidConfigException('Unable to determine the entry script file path.');
}
}
/**
* Returns information about the capabilities of user browser.
* @param string $userAgent the user agent to be analyzed. Defaults to null, meaning using the
* current User-Agent HTTP header information.
* @return array user browser capabilities.
* @see http://www.php.net/manual/en/function.get-browser.php
*/
public function getBrowser($userAgent = null)
{
return get_browser($userAgent, true);
}
/**
* Returns user browser accept types, null if not present.
* @return string user browser accept types, null if not present
*/
public function getAcceptTypes()
{
return isset($_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 $_preferredLanguages;
/**
* Returns the user preferred languages.
* The languages returned are ordered by user's preference, starting with the language that the user
* prefers the most.
* @return string the user preferred languages. An empty array may be returned if the user has no preference.
*/
public function getPreferredLanguages()
{
if ($this->_preferredLanguages === null) {
if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE']) && ($n = preg_match_all('/([\w\-_]+)\s*(;\s*q\s*=\s*(\d*\.\d*))?/', $_SERVER['HTTP_ACCEPT_LANGUAGE'], $matches)) > 0) {
$languages = array();
for ($i = 0; $i < $n; ++$i) {
$languages[$matches[1][$i]] = empty($matches[3][$i]) ? 1.0 : floatval($matches[3][$i]);
}
arsort($languages);
$this->_preferredLanguages = array_keys($languages);
} else {
$this->_preferredLanguages = array();
}
}
return $this->_preferredLanguages;
}
/**
* Returns the language most preferred by the user.
* @return string|boolean the language most preferred by the user. If the user has no preference, false
* will be returned.
*/
public function getPreferredLanguage()
{
$languages = $this->getPreferredLanguages();
return isset($languages[0]) ? $languages[0] : false;
}
/**
* Returns the cookie collection.
* The result can be used like an associative array. Adding {@link CHttpCookie} objects
* to the collection will send the cookies to the client; and removing the objects
* from the collection will delete those cookies on the client.
* @return CCookieCollection the cookie collection.
*/
public function getCookies()
{
if ($this->_cookies !== null) {
return $this->_cookies;
} else {
return $this->_cookies = new CCookieCollection($this);
}
}
private $_csrfToken;
/**
* Returns the random token used to perform CSRF validation.
* The token will be read from cookie first. If not found, a new token
* will be generated.
* @return string the random token for CSRF validation.
* @see enableCsrfValidation
*/
public function getCsrfToken()
{
if ($this->_csrfToken === null) {
$cookie = $this->getCookies()->itemAt($this->csrfTokenName);
if (!$cookie || ($this->_csrfToken = $cookie->value) == null) {
$cookie = $this->createCsrfCookie();
$this->_csrfToken = $cookie->value;
$this->getCookies()->add($cookie->name, $cookie);
}
}
return $this->_csrfToken;
}
/**
* Creates a cookie with a randomly generated CSRF token.
* Initial values specified in {@link csrfCookie} will be applied
* to the generated cookie.
* @return CHttpCookie the generated cookie
* @see enableCsrfValidation
*/
protected function createCsrfCookie()
{
$cookie = new CHttpCookie($this->csrfTokenName, sha1(uniqid(mt_rand(), true)));
if (is_array($this->csrfCookie)) {
foreach ($this->csrfCookie as $name => $value) {
$cookie->$name = $value;
}
}
return $cookie;
}
/**
* Performs the CSRF validation.
* This is the event handler responding to {@link CApplication::onBeginRequest}.
* The default implementation will compare the CSRF token obtained
* from a cookie and from a POST field. If they are different, a CSRF attack is detected.
* @param CEvent $event event parameter
* @throws CHttpException if the validation fails
*/
public function validateCsrfToken($event)
{
if ($this->getIsPostRequest()) {
// only validate POST requests
$cookies = $this->getCookies();
if ($cookies->contains($this->csrfTokenName) && isset($_POST[$this->csrfTokenName])) {
$tokenFromCookie = $cookies->itemAt($this->csrfTokenName)->value;
$tokenFromPost = $_POST[$this->csrfTokenName];
$valid = $tokenFromCookie === $tokenFromPost;
} else {
$valid = false;
}
if (!$valid) {
throw new CHttpException(400, Yii::t('yii|The CSRF token could not be verified.'));
}
}
}
}