CHttpRequest

public static function compareAcceptTypes($a,$b)
{
    // check for equal quality first
    if($a['params']['q']===$b['params']['q'])
        if(!($a['type']==='*' xor $b['type']==='*'))
            if (!($a['subType']==='*' xor $b['subType']==='*'))
                // finally, higher number of parameters counts as greater precedence
                if(count($a['params'])===count($b['params']))
                    return 0;
                else
                    return count($a['params'])<count($b['params']) ? 1 : -1;
            // more specific takes precedence - whichever one doesn't have a * subType
            else
                return $a['subType']==='*' ? 1 : -1;
        // more specific takes precedence - whichever one doesn't have a * type
        else
            return $a['type']==='*' ? 1 : -1;
    else
        return ($a['params']['q']<$b['params']['q']) ? 1 : -1;
}

protected function createCsrfCookie()
{
    $securityManager=Yii::app()->getSecurityManager();
    $token=$securityManager->generateRandomBytes(32);
    $maskedToken=$securityManager->maskToken($token);
    $cookie=new CHttpCookie($this->csrfTokenName,$maskedToken);
    if(is_array($this->csrfCookie))
    {
        foreach($this->csrfCookie as $name=>$value)
            $cookie->$name=$value;
    }
    return $cookie;
}

protected function decodePathInfo($pathInfo)
{
    $pathInfo = urldecode($pathInfo);

    // 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', $pathInfo))
    {
        return $pathInfo;
    }
    else
    {
        return utf8_encode($pathInfo);
    }
}

public function getAcceptTypes()
{
    return isset($_SERVER['HTTP_ACCEPT'])?$_SERVER['HTTP_ACCEPT']:null;
}

public function getBaseUrl($absolute=false)
{
    if($this->_baseUrl===null)
        $this->_baseUrl=rtrim(dirname($this->getScriptUrl()),'\\/');
    return $absolute ? $this->getHostInfo() . $this->_baseUrl : $this->_baseUrl;
}

public function getBrowser($userAgent=null)
{
    return get_browser($userAgent,true);
}

public function getContentType()
{
    if (isset($_SERVER["CONTENT_TYPE"])) {
        return $_SERVER["CONTENT_TYPE"];
    } elseif (isset($_SERVER["HTTP_CONTENT_TYPE"])) {
        //fix bug https://bugs.php.net/bug.php?id=66606
        return $_SERVER["HTTP_CONTENT_TYPE"];
    }
    return null;
}

public function getCookies()
{
    if($this->_cookies!==null)
        return $this->_cookies;
    else
        return $this->_cookies=new CCookieCollection($this);
}

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;
}

public function getDelete($name,$defaultValue=null)
{
    if($this->getIsDeleteViaPostRequest())
        return $this->getPost($name, $defaultValue);

    if($this->getIsDeleteRequest())
    {
        $restParams=$this->getRestParams();
        return isset($restParams[$name]) ? $restParams[$name] : $defaultValue;
    }
    else
        return $defaultValue;
}

public function getHostInfo($schema='')
{
    if($this->_hostInfo===null)
    {
        if($secure=$this->getIsSecureConnection())
            $http='https';
        else
            $http='http';
        if(isset($_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;
        }
    }
    if($schema!=='')
    {
        $secure=$this->getIsSecureConnection();
        if($secure && $schema==='https' || !$secure && $schema==='http')
            return $this->_hostInfo;

        $port=$schema==='https' ? $this->getSecurePort() : $this->getPort();
        if($port!==80 && $schema==='http' || $port!==443 && $schema==='https')
            $port=':'.$port;
        else
            $port='';

        $pos=strpos($this->_hostInfo,':');
        return $schema.substr($this->_hostInfo,$pos,strcspn($this->_hostInfo,':',$pos+1)+1).$port;
    }
    else
        return $this->_hostInfo;
}

public function getHttpVersion()
{
    if($this->_httpVersion===null)
    {
        if(isset($_SERVER['SERVER_PROTOCOL']) && $_SERVER['SERVER_PROTOCOL']==='HTTP/1.0')
            $this->_httpVersion='1.0';
        else
            $this->_httpVersion='1.1';
    }
    return $this->_httpVersion;
}

public function getIsAjaxRequest()
{
    return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH']==='XMLHttpRequest';
}

public function getIsDeleteRequest()
{
    return (isset($_SERVER['REQUEST_METHOD']) && !strcasecmp($_SERVER['REQUEST_METHOD'],'DELETE')) || $this->getIsDeleteViaPostRequest();
}

protected function getIsDeleteViaPostRequest()
{
    return isset($_POST['_method']) && !strcasecmp($_POST['_method'],'DELETE');
}

public function getIsFlashRequest()
{
    return isset($_SERVER['HTTP_USER_AGENT']) && (stripos($_SERVER['HTTP_USER_AGENT'],'Shockwave')!==false || stripos($_SERVER['HTTP_USER_AGENT'],'Flash')!==false);
}

public function getIsPatchRequest()
{
    return (isset($_SERVER['REQUEST_METHOD']) && !strcasecmp($_SERVER['REQUEST_METHOD'],'PATCH')) || $this->getIsPatchViaPostRequest();
}

protected function getIsPatchViaPostRequest()
{
    return isset($_POST['_method']) && !strcasecmp($_POST['_method'],'PATCH');
}

public function getIsPostRequest()
{
    return isset($_SERVER['REQUEST_METHOD']) && !strcasecmp($_SERVER['REQUEST_METHOD'],'POST');
}

public function getIsPutRequest()
{
    return (isset($_SERVER['REQUEST_METHOD']) && !strcasecmp($_SERVER['REQUEST_METHOD'],'PUT')) || $this->getIsPutViaPostRequest();
}

protected function getIsPutViaPostRequest()
{
    return isset($_POST['_method']) && !strcasecmp($_POST['_method'],'PUT');
}

public function getIsSecureConnection()
{
    return isset($_SERVER['HTTPS']) && (strcasecmp($_SERVER['HTTPS'],'on')===0 || $_SERVER['HTTPS']==1)
        || isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && strcasecmp($_SERVER['HTTP_X_FORWARDED_PROTO'],'https')===0;
}

public function getParam($name,$defaultValue=null)
{
    return isset($_GET[$name]) ? $_GET[$name] : (isset($_POST[$name]) ? $_POST[$name] : $defaultValue);
}

public function getPatch($name,$defaultValue=null)
{
    if($this->getIsPatchViaPostRequest())
        return $this->getPost($name, $defaultValue);

    if($this->getIsPatchRequest())
    {
        $restParams=$this->getRestParams();
        return isset($restParams[$name]) ? $restParams[$name] : $defaultValue;
    }
    else
        return $defaultValue;
}

public function getPathInfo()
{
    if($this->_pathInfo===null)
    {
        $pathInfo=$this->getRequestUri();

        if(($pos=strpos($pathInfo,'?'))!==false)
           $pathInfo=substr($pathInfo,0,$pos);

        $pathInfo=$this->decodePathInfo($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 CException(Yii::t('yii','CHttpRequest is unable to determine the path info of the request.'));

        if($pathInfo==='/' || $pathInfo===false)
            $pathInfo='';
        elseif($pathInfo!=='' && $pathInfo[0]==='/')
            $pathInfo=substr($pathInfo,1);

        if(($posEnd=strlen($pathInfo)-1)>0 && $pathInfo[$posEnd]==='/')
            $pathInfo=substr($pathInfo,0,$posEnd);

        $this->_pathInfo=$pathInfo;
    }
    return $this->_pathInfo;
}

public function getPort()
{
    if($this->_port===null)
        $this->_port=!$this->getIsSecureConnection() && isset($_SERVER['SERVER_PORT']) ? (int)$_SERVER['SERVER_PORT'] : 80;
    return $this->_port;
}

public function getPost($name,$defaultValue=null)
{
    return isset($_POST[$name]) ? $_POST[$name] : $defaultValue;
}

public function getPreferredAcceptType()
{
    $preferredAcceptTypes=$this->getPreferredAcceptTypes();
    return empty($preferredAcceptTypes) ? false : $preferredAcceptTypes[0];
}

public function getPreferredAcceptTypes()
{
    if($this->_preferredAcceptTypes===null)
    {
        $accepts=self::parseAcceptHeader($this->getAcceptTypes());
        usort($accepts,array(get_class($this),'compareAcceptTypes'));
        $this->_preferredAcceptTypes=$accepts;
    }
    return $this->_preferredAcceptTypes;
}

public function getPreferredLanguage($languages=array())
{
    $preferredLanguages=$this->getPreferredLanguages();
    if(empty($languages)) {
        return !empty($preferredLanguages) ? CLocale::getCanonicalID($preferredLanguages[0]) : false;
    }
    foreach ($preferredLanguages as $preferredLanguage) {
        $preferredLanguage=CLocale::getCanonicalID($preferredLanguage);
        foreach ($languages as $language) {
            $language=CLocale::getCanonicalID($language);
            // en_us==en_us, en==en_us, en_us==en
            if($language===$preferredLanguage || strpos($preferredLanguage,$language.'_')===0 || strpos($language,$preferredLanguage.'_')===0) {
                return $language;
            }
        }
    }
    return reset($languages);
}

public function getPreferredLanguages()
{
    if($this->_preferredLanguages===null)
    {
        $sortedLanguages=array();
        if(isset($_SERVER['HTTP_ACCEPT_LANGUAGE']) && $n=preg_match_all('/([\w\-_]+)(?:\s*;\s*q\s*=\s*(\d*\.?\d*))?/',$_SERVER['HTTP_ACCEPT_LANGUAGE'],$matches))
        {
            $languages=array();

            for($i=0;$i<$n;++$i)
            {
                $q=$matches[2][$i];
                if($q==='')
                    $q=1;
                if($q)
                    $languages[]=array((float)$q,$matches[1][$i]);
            }

            usort($languages,create_function('$a,$b','if($a[0]==$b[0]) {return 0;} return ($a[0]<$b[0]) ? 1 : -1;'));
            foreach($languages as $language)
                $sortedLanguages[]=$language[1];
        }
        $this->_preferredLanguages=$sortedLanguages;
    }
    return $this->_preferredLanguages;
}

public function getPut($name,$defaultValue=null)
{
    if($this->getIsPutViaPostRequest())
        return $this->getPost($name, $defaultValue);

    if($this->getIsPutRequest())
    {
        $restParams=$this->getRestParams();
        return isset($restParams[$name]) ? $restParams[$name] : $defaultValue;
    }
    else
        return $defaultValue;
}

public function getQuery($name,$defaultValue=null)
{
    return isset($_GET[$name]) ? $_GET[$name] : $defaultValue;
}

public function getQueryString()
{
    return isset($_SERVER['QUERY_STRING'])?$_SERVER['QUERY_STRING']:'';
}

public function getRawBody()
{
    static $rawBody;
    if($rawBody===null)
        $rawBody=file_get_contents('php://input');
    return $rawBody;
}

public function getRequestType()
{
    if(isset($_POST['_method']))
        return strtoupper($_POST['_method']);
    elseif(isset($_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE']))
        return strtoupper($_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE']);

    return strtoupper(isset($_SERVER['REQUEST_METHOD'])?$_SERVER['REQUEST_METHOD']:'GET');
}

public function getRequestUri()
{
    if($this->_requestUri===null)
    {
        if(isset($_SERVER['HTTP_X_REWRITE_URL'])) // IIS
            $this->_requestUri=$_SERVER['HTTP_X_REWRITE_URL'];
        elseif(isset($_SERVER['REQUEST_URI']))
        {
            $this->_requestUri=$_SERVER['REQUEST_URI'];
            if(!empty($_SERVER['HTTP_HOST']))
            {
                if(strpos($this->_requestUri,$_SERVER['HTTP_HOST'])!==false)
                    $this->_requestUri=preg_replace('/^\w+:\/\/[^\/]+/','',$this->_requestUri);
            }
            else
                $this->_requestUri=preg_replace('/^(http|https):\/\/[^\/]+/i','',$this->_requestUri);
        }
        elseif(isset($_SERVER['ORIG_PATH_INFO']))  // IIS 5.0 CGI
        {
            $this->_requestUri=$_SERVER['ORIG_PATH_INFO'];
            if(!empty($_SERVER['QUERY_STRING']))
                $this->_requestUri.='?'.$_SERVER['QUERY_STRING'];
        }
        else
            throw new CException(Yii::t('yii','CHttpRequest is unable to determine the request URI.'));
    }

    return $this->_requestUri;
}

public function getRestParams()
{
    if($this->_restParams===null)
    {
        $result=array();
        if (strncmp($this->getContentType(), 'application/json', 16) === 0)
            $result = CJSON::decode($this->getRawBody(), $this->jsonAsArray);
        elseif(function_exists('mb_parse_str'))
            mb_parse_str($this->getRawBody(), $result);
        else
            parse_str($this->getRawBody(), $result);
        $this->_restParams=$result;
    }

    return $this->_restParams;
}

public function getScriptFile()
{
    if($this->_scriptFile!==null)
        return $this->_scriptFile;
    else
        return $this->_scriptFile=realpath($_SERVER['SCRIPT_FILENAME']);
}

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 CException(Yii::t('yii','CHttpRequest is unable to determine the entry script URL.'));
    }
    return $this->_scriptUrl;
}

public function getSecurePort()
{
    if($this->_securePort===null)
        $this->_securePort=$this->getIsSecureConnection() && isset($_SERVER['SERVER_PORT']) ? (int)$_SERVER['SERVER_PORT'] : 443;
    return $this->_securePort;
}

public function getServerName()
{
    return $_SERVER['SERVER_NAME'];
}

public function getServerPort()
{
    return $_SERVER['SERVER_PORT'];
}

public function getUrl()
{
    return $this->getRequestUri();
}

public function getUrlReferrer()
{
    return isset($_SERVER['HTTP_REFERER'])?$_SERVER['HTTP_REFERER']:null;
}

public function getUserAgent()
{
    return isset($_SERVER['HTTP_USER_AGENT'])?$_SERVER['HTTP_USER_AGENT']:null;
}

public function getUserHost()
{
    return isset($_SERVER['REMOTE_HOST'])?$_SERVER['REMOTE_HOST']:null;
}

public function getUserHostAddress()
{
    return isset($_SERVER['REMOTE_ADDR'])?$_SERVER['REMOTE_ADDR']:'127.0.0.1';
}

public function init()
{
    parent::init();
    $this->normalizeRequest();
}

protected function normalizeRequest()
{
    // normalize request
    if(function_exists('get_magic_quotes_gpc') && 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($this->enableCsrfValidation)
        Yii::app()->attachEventHandler('onBeginRequest',array($this,'validateCsrfToken'));
}

public static function parseAcceptHeader($header)
{
    $matches=array();
    $accepts=array();
    // get individual entries with their type, subtype, basetype and params
    preg_match_all('/(?:\G\s?,\s?|^)(\w+|\*)\/(\w+|\*)(?:\+(\w+))?|(?<!^)\G(?:\s?;\s?(\w+)=([\w\.]+))/',$header,$matches);
    // the regexp should (in theory) always return an array of 6 arrays
    if(count($matches)===6)
    {
        $i=0;
        $itemLen=count($matches[1]);
        while($i<$itemLen)
        {
            // fill out a content type
            $accept=array(
                'type'=>$matches[1][$i],
                'subType'=>$matches[2][$i],
                'baseType'=>null,
                'params'=>array(),
            );
            // fill in the base type if it exists
            if($matches[3][$i]!==null && $matches[3][$i]!=='')
                $accept['baseType']=$matches[3][$i];
            // continue looping while there is no new content type, to fill in all accompanying params
            for($i++;$i<$itemLen;$i++)
            {
                // if the next content type is null, then the item is a param for the current content type
                if($matches[1][$i]===null || $matches[1][$i]==='')
                {
                    // if this is the quality param, convert it to a double
                    if($matches[4][$i]==='q')
                    {
                        // sanity check on q value
                        $q=(double)$matches[5][$i];
                        if($q>1)
                            $q=(double)1;
                        elseif($q<0)
                            $q=(double)0;
                        $accept['params'][$matches[4][$i]]=$q;
                    }
                    else
                        $accept['params'][$matches[4][$i]]=$matches[5][$i];
                }
                else
                    break;
            }
            // q defaults to 1 if not explicitly given
            if(!isset($accept['params']['q']))
                $accept['params']['q']=(double)1;
            $accepts[] = $accept;
        }
    }
    return $accepts;
}

public function redirect($url,$terminate=true,$statusCode=302)
{
    if(strpos($url,'/')===0 && strpos($url,'//')!==0)
        $url=$this->getHostInfo().$url;
    header('Location: '.$url, true, $statusCode);
    if($terminate)
        Yii::app()->end();
}

public function sendFile($fileName,$content,$mimeType=null,$terminate=true)
{
    if($mimeType===null)
    {
        if(($mimeType=CFileHelper::getMimeTypeByExtension($fileName))===null)
            $mimeType='text/plain';
    }

    $fileSize=(function_exists('mb_strlen') ? mb_strlen($content,'8bit') : strlen($content));
    $contentStart=0;
    $contentEnd=$fileSize-1;

    $httpVersion=$this->getHttpVersion();
    if(isset($_SERVER['HTTP_RANGE']))
    {
        header('Accept-Ranges: bytes');

        //client sent us a multibyte range, can not hold this one for now
        if(strpos($_SERVER['HTTP_RANGE'],',')!==false)
        {
            header("Content-Range: bytes $contentStart-$contentEnd/$fileSize");
            throw new CHttpException(416,'Requested Range Not Satisfiable');
        }

        $range=str_replace('bytes=','',$_SERVER['HTTP_RANGE']);

        //range requests starts from "-", so it means that data must be dumped the end point.
        if($range[0]==='-')
            $contentStart=$fileSize-substr($range,1);
        else
        {
            $range=explode('-',$range);
            $contentStart=$range[0];

            // check if the last-byte-pos presents in header
            if((isset($range[1]) && is_numeric($range[1])))
                $contentEnd=$range[1];
        }

        /* Check the range and make sure it's treated according to the specs.
         * http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
         */
        // End bytes can not be larger than $end.
        $contentEnd=($contentEnd > $fileSize) ? $fileSize-1 : $contentEnd;

        // Validate the requested range and return an error if it's not correct.
        $wrongContentStart=($contentStart>$contentEnd || $contentStart>$fileSize-1 || $contentStart<0);

        if($wrongContentStart)
        {
            header("Content-Range: bytes $contentStart-$contentEnd/$fileSize");
            throw new CHttpException(416,'Requested Range Not Satisfiable');
        }

        header("HTTP/$httpVersion 206 Partial Content");
        header("Content-Range: bytes $contentStart-$contentEnd/$fileSize");
    }
    else
        header("HTTP/$httpVersion 200 OK");

    $length=$contentEnd-$contentStart+1; // Calculate new content length

    header('Pragma: public');
    header('Expires: 0');
    header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
    header("Content-Type: $mimeType");
    header('Content-Length: '.$length);
    header("Content-Disposition: attachment; filename=\"$fileName\"");
    header('Content-Transfer-Encoding: binary');
    $content=function_exists('mb_substr') ? mb_substr($content,$contentStart,$length,'8bit') : substr($content,$contentStart,$length);

    if($terminate)
    {
        // clean up the application first because the file downloading could take long time
        // which may cause timeout of some resources (such as DB connection)
        ob_start();
        Yii::app()->end(0,false);
        ob_end_clean();
        echo $content;
        exit(0);
    }
    else
        echo $content;
}

public function setBaseUrl($value)
{
    $this->_baseUrl=$value;
}

public function setHostInfo($value)
{
    $this->_hostInfo=rtrim($value,'/');
}

public function setPort($value)
{
    $this->_port=(int)$value;
    $this->_hostInfo=null;
}

public function setScriptUrl($value)
{
    $this->_scriptUrl='/'.trim($value,'/');
}

public function setSecurePort($value)
{
    $this->_securePort=(int)$value;
    $this->_hostInfo=null;
}

public function stripSlashes(&$data)
{
    if(is_array($data))
    {
        if(count($data) == 0)
            return $data;
        $keys=array_map('stripslashes',array_keys($data));
        $data=array_combine($keys,array_values($data));
        return array_map(array($this,'stripSlashes'),$data);
    }
    else
        return stripslashes($data);
}

public function validateCsrfToken($event)
{
    if ($this->getIsPostRequest() ||
        $this->getIsPutRequest() ||
        $this->getIsPatchRequest() ||
        $this->getIsDeleteRequest())
    {
        $cookies=$this->getCookies();

        $method=$this->getRequestType();
        switch($method)
        {
            case 'POST':
                $maskedUserToken=$this->getPost($this->csrfTokenName);
            break;
            case 'PUT':
                $maskedUserToken=$this->getPut($this->csrfTokenName);
            break;
            case 'PATCH':
                $maskedUserToken=$this->getPatch($this->csrfTokenName);
            break;
            case 'DELETE':
                $maskedUserToken=$this->getDelete($this->csrfTokenName);
        }

        if (!empty($maskedUserToken) && $cookies->contains($this->csrfTokenName))
        {
            $securityManager=Yii::app()->getSecurityManager();
            $maskedCookieToken=$cookies->itemAt($this->csrfTokenName)->value;
            $cookieToken=$securityManager->unmaskToken($maskedCookieToken);
            $userToken=$securityManager->unmaskToken($maskedUserToken);
            $valid=$cookieToken===$userToken;
        }
        else
            $valid = false;
        if (!$valid)
            throw new CHttpException(400,Yii::t('yii','The CSRF token could not be verified.'));
    }
}

public function xSendFile($filePath, $options=array())
{
    if(!isset($options['forceDownload']) || $options['forceDownload'])
        $disposition='attachment';
    else
        $disposition='inline';

    if(!isset($options['saveName']))
        $options['saveName']=basename($filePath);

    if(!isset($options['mimeType']))
    {
        if(($options['mimeType']=CFileHelper::getMimeTypeByExtension($filePath))===null)
            $options['mimeType']='text/plain';
    }

    if(!isset($options['xHeader']))
        $options['xHeader']='X-Sendfile';

    if($options['mimeType']!==null)
        header('Content-Type: '.$options['mimeType']);
    header('Content-Disposition: '.$disposition.'; filename="'.$options['saveName'].'"');
    if(isset($options['addHeaders']))
    {
        foreach($options['addHeaders'] as $header=>$value)
            header($header.': '.$value);
    }
    header(trim($options['xHeader']).': '.$filePath);

    if(!isset($options['terminate']) || $options['terminate'])
        Yii::app()->end();
}