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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
*/
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namespace yii\web;
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use Yii;
use yii\base\InvalidConfigException;
use yii\helpers\Security;
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/**
* @author Qiang Xue <qiang.xue@gmail.com>
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* @since 2.0
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*/
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class Request extends \yii\base\Request
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{
/**
* @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
*/
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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
*/
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public $csrfCookie = array('httpOnly' => true);
/**
* @var boolean whether cookies should be validated to ensure they are not tampered. Defaults to true.
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*/
public $enableCookieValidation = true;
/**
* @var string|boolean the name of the POST parameter that is used to indicate if a request is a PUT, PATCH or DELETE
* request tunneled through POST. Default to '_method'.
* @see getMethod
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* @see getRestParams
*/
public $restVar = '_method';
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private $_cookies;
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/**
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* 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()
{
$this->validateCsrfToken();
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$result = Yii::$app->getUrlManager()->parseRequest($this);
if ($result !== false) {
list ($route, $params) = $result;
$_GET = array_merge($_GET, $params);
return array($route, $_GET);
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} else {
throw new HttpException(404, Yii::t('yii', 'Page not found.'));
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}
}
/**
* Returns the method of the current request (e.g. GET, POST, HEAD, PUT, PATCH, DELETE).
* @return string request method, such as GET, POST, HEAD, PUT, PATCH, DELETE.
* The value returned is turned into upper case.
*/
public function getMethod()
{
if (isset($_POST[$this->restVar])) {
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return strtoupper($_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 a PATCH request.
* @return boolean whether this is a PATCH request.
*/
public function getIsPatch()
{
return $this->getMethod() === 'PATCH';
}
/**
* Returns whether this is an AJAX (XMLHttpRequest) request.
* @return boolean whether this is an AJAX (XMLHttpRequest) request.
*/
public function getIsAjax()
{
return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] === 'XMLHttpRequest';
}
/**
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* Returns whether this is an Adobe Flash or Flex request.
* @return boolean whether this is an Adobe Flash or Adobe Flex request.
*/
public function getIsFlash()
{
return isset($_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 {
$this->_restParams = array();
if (function_exists('mb_parse_str')) {
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mb_parse_str($this->getRawBody(), $this->_restParams);
} else {
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parse_str($this->getRawBody(), $this->_restParams);
}
}
}
return $this->_restParams;
}
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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;
}
/**
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* 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, $defaultValue = null)
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{
return isset($_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 $defaultValue the default parameter value if the POST parameter does not exist.
* @return mixed the POST parameter value
* @see getParam
*/
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public function getPost($name, $defaultValue = null)
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{
return isset($_POST[$name]) ? $_POST[$name] : $defaultValue;
}
/**
* Returns the named DELETE parameter value.
* @param string $name the DELETE parameter name
* @param mixed $defaultValue the default parameter value if the DELETE parameter does not exist.
* @return mixed the DELETE parameter value
*/
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public function getDelete($name, $defaultValue = null)
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{
return $this->getIsDelete() ? $this->getRestParam($name, $defaultValue) : null;
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}
/**
* Returns the named PUT parameter value.
* @param string $name the PUT parameter name
* @param mixed $defaultValue the default parameter value if the PUT parameter does not exist.
* @return mixed the PUT parameter value
*/
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public function getPut($name, $defaultValue = null)
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{
return $this->getIsPut() ? $this->getRestParam($name, $defaultValue) : null;
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}
/**
* Returns the named PATCH parameter value.
* @param string $name the PATCH parameter name
* @param mixed $defaultValue the default parameter value if the PATCH parameter does not exist.
* @return mixed the PATCH parameter value
*/
public function getPatch($name, $defaultValue = null)
{
return $this->getIsPatch() ? $this->getRestParam($name, $defaultValue) : null;
}
private $_hostInfo;
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/**
* Returns the schema and host part of the current request URL.
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* The returned URL does not have an ending slash.
* By default this is determined based on the user request information.
* You may explicitly specify it by setting the [[setHostInfo()|hostInfo]] property.
* @return string schema and hostname part (with port number if needed) of the request URL (e.g. `http://www.yiiframework.com`)
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* @see setHostInfo
*/
public function getHostInfo()
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{
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if ($this->_hostInfo === null) {
$secure = $this->getIsSecureConnection();
$http = $secure ? 'https' : 'http';
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if (isset($_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;
}
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}
}
return $this->_hostInfo;
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}
/**
* 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 $value the schema and host part of the application URL. The trailing slashes will be removed.
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*/
public function setHostInfo($value)
{
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$this->_hostInfo = rtrim($value, '/');
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}
private $_baseUrl;
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/**
* Returns the relative URL for the application.
* This is similar to [[scriptUrl]] except that it does not include the script file name,
* and the ending slashes are removed.
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* @return string the relative URL for the application
* @see setScriptUrl
*/
public function getBaseUrl()
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{
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if ($this->_baseUrl === null) {
$this->_baseUrl = rtrim(dirname($this->getScriptUrl()), '\\/');
}
return $this->_baseUrl;
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}
/**
* 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)
{
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$this->_baseUrl = $value;
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}
private $_scriptUrl;
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/**
* Returns the relative URL of the entry script.
* The implementation of this method referenced Zend_Controller_Request_Http in Zend Framework.
* @return string the relative URL of the entry script.
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* @throws InvalidConfigException if unable to determine the entry script URL
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*/
public function getScriptUrl()
{
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if ($this->_scriptUrl === null) {
$scriptFile = $this->getScriptFile();
$scriptName = basename($scriptFile);
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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));
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} else {
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throw new InvalidConfigException('Unable to determine the entry script URL.');
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}
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}
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)
{
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$this->_scriptUrl = '/' . trim($value, '/');
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}
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 $_pathInfo;
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/**
* Returns the path info of the currently requested URL.
* A path info refers to the part that is after the entry script and before the question mark (query string).
* The starting and ending slashes are both removed.
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* @return string part of the request URL that is after the entry script and before the question mark.
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* Note, the returned path info is already URL-decoded.
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* @throws InvalidConfigException if the path info cannot be determined due to unexpected server configuration
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*/
public function getPathInfo()
{
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if ($this->_pathInfo === null) {
$this->_pathInfo = $this->resolvePathInfo();
}
return $this->_pathInfo;
}
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/**
* 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)
{
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$this->_pathInfo = ltrim($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).
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* The starting slashes are both removed (ending slashes will be kept).
* @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.
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* @throws InvalidConfigException if the path info cannot be determined due to unexpected server configuration
*/
protected function resolvePathInfo()
{
$pathInfo = $this->getUrl();
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if (($pos = strpos($pathInfo, '?')) !== false) {
$pathInfo = substr($pathInfo, 0, $pos);
}
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$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);
}
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$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($scriptUrl));
} else {
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throw new InvalidConfigException('Unable to determine the path info of the current request.');
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}
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return ltrim($pathInfo, '/');
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}
/**
* Returns the currently requested absolute URL.
* This is a shortcut to the concatenation of [[hostInfo]] and [[url]].
* @return string the currently requested absolute URL.
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*/
public function getAbsoluteUrl()
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{
return $this->getHostInfo() . $this->getUrl();
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}
private $_url;
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/**
* Returns the currently requested relative URL.
* This refers to the portion of the URL that is after the [[hostInfo]] part.
* It includes the [[queryString]] part if any.
* @return string the currently requested relative URL. Note that the URI returned is URL-encoded.
* @throws InvalidConfigException if the URL cannot be determined due to unusual server configuration
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*/
public function getUrl()
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{
if ($this->_url === null) {
$this->_url = $this->resolveRequestUri();
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}
return $this->_url;
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}
/**
* Sets the currently requested relative URL.
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* 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)
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{
$this->_url = $value;
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}
/**
* Resolves the request URI portion for the currently requested URL.
* This refers to the portion that is after the [[hostInfo]] part. It includes the [[queryString]] part if any.
* The implementation of this method referenced Zend_Controller_Request_Http in Zend Framework.
* @return string|boolean the request URI portion for the currently requested URL.
* Note that the URI returned is URL-encoded.
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* @throws InvalidConfigException if the request URI cannot be determined due to unusual server configuration
*/
protected function resolveRequestUri()
{
if (isset($_SERVER['HTTP_X_REWRITE_URL'])) { // IIS
$requestUri = $_SERVER['HTTP_X_REWRITE_URL'];
} elseif (isset($_SERVER['REQUEST_URI'])) {
$requestUri = $_SERVER['REQUEST_URI'];
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if ($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 {
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throw new InvalidConfigException('Unable to determine the request URI.');
}
return $requestUri;
}
/**
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* Returns part of the request URL that is after the question mark.
* @return string part of the request URL that is after the question mark
*/
public function getQueryString()
{
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return isset($_SERVER['QUERY_STRING']) ? $_SERVER['QUERY_STRING'] : '';
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}
/**
* Return if the request is sent via secure channel (https).
* @return boolean if the request is sent via secure channel (https)
*/
public function getIsSecureConnection()
{
return isset($_SERVER['HTTPS']) && ($_SERVER['HTTPS'] === 'on' || $_SERVER['HTTPS'] == 1)
|| isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https';
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}
/**
* 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'];
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}
/**
* Returns the URL referrer, null if not present
* @return string URL referrer, null if not present
*/
public function getReferrer()
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{
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return isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : null;
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}
/**
* Returns the user agent, null if not present.
* @return string user agent, null if not present
*/
public function getUserAgent()
{
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return isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : null;
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}
/**
* Returns the user IP address.
* @return string user IP address
*/
public function getUserIP()
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{
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return isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : '127.0.0.1';
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}
/**
* Returns the user host name, null if it cannot be determined.
* @return string user host name, null if cannot be determined
*/
public function getUserHost()
{
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return isset($_SERVER['REMOTE_HOST']) ? $_SERVER['REMOTE_HOST'] : null;
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}
/**
* Returns user browser accept types, null if not present.
* @return string user browser accept types, null if not present
*/
public function getAcceptTypes()
{
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return isset($_SERVER['HTTP_ACCEPT']) ? $_SERVER['HTTP_ACCEPT'] : null;
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}
private $_port;
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/**
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* Returns the port to use for insecure requests.
* Defaults to 80, or the port specified by the server if the current
* request is insecure.
* @return integer port number for insecure requests.
* @see setPort
*/
public function getPort()
{
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if ($this->_port === null) {
$this->_port = !$this->getIsSecureConnection() && isset($_SERVER['SERVER_PORT']) ? (int)$_SERVER['SERVER_PORT'] : 80;
}
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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;
}
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}
private $_securePort;
/**
* Returns the port to use for secure requests.
* Defaults to 443, or the port specified by the server if the current
* request is secure.
* @return integer port number for secure requests.
* @see setSecurePort
*/
public function getSecurePort()
{
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if ($this->_securePort === null) {
$this->_securePort = $this->getIsSecureConnection() && isset($_SERVER['SERVER_PORT']) ? (int)$_SERVER['SERVER_PORT'] : 443;
}
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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;
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}
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}
private $_contentTypes;
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/**
* Returns the content types accepted by the end user.
* This is determined by the `Accept` HTTP header.
* @return array the content types ordered by the preference level. The first element
* represents the most preferred content type.
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*/
public function getAcceptedContentTypes()
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{
if ($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;
}
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}
});
$result = array();
foreach ($accepts as $accept) {
$result[] = $accept[0];
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}
return array_unique($result);
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}
/**
* 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.
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*/
public function getPreferredLanguage($languages = array())
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{
$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);
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}
/**
* 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 = $request->cookies->getValue('name');
* ~~~
*
* @return CookieCollection the cookie collection.
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*/
public function getCookies()
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{
if ($this->_cookies === null) {
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$this->_cookies = new CookieCollection($this->loadCookies(), array(
'readOnly' => true,
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));
}
return $this->_cookies;
}
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/**
* Converts `$_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) && ($value = Security::validateData($value, $key)) !== false) {
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$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 $_cookieValidationKey;
/**
* @return string the secret key used for cookie validation. If it was not set previously,
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* a random key will be generated and used.
*/
public function getCookieValidationKey()
{
if ($this->_cookieValidationKey === null) {
$this->_cookieValidationKey = Security::getSecretKey(__CLASS__ . '/' . Yii::$app->id);
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}
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 === 'PATCH' || $method === 'DELETE') {
$cookies = $this->getCookies();
switch ($method) {
case 'POST':
$token = $this->getPost($this->csrfTokenName);
break;
case 'PUT':
$token = $this->getPut($this->csrfTokenName);
break;
case 'PATCH':
$token = $this->getPatch($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.'));
}
}
}
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}