CWebService

public function __construct($provider,$wsdlUrl,$serviceUrl)
{
    $this->provider=$provider;
    $this->wsdlUrl=$wsdlUrl;
    $this->serviceUrl=$serviceUrl;
}

public function generateWsdl()
{
    $providerClass=is_object($this->provider) ? get_class($this->provider) : Yii::import($this->provider,true);
    if($this->wsdlCacheDuration>0 && $this->cacheID!==false && ($cache=Yii::app()->getComponent($this->cacheID))!==null)
    {
        $key='Yii.CWebService.'.$providerClass.$this->serviceUrl.$this->encoding;
        if(($wsdl=$cache->get($key))!==false)
            return $wsdl;
    }
    $generator=Yii::createComponent($this->generatorConfig);
    $wsdl=$generator->generateWsdl($providerClass,$this->serviceUrl,$this->encoding);
    if(isset($key))
        $cache->set($key,$wsdl,$this->wsdlCacheDuration);
    return $wsdl;
}

public function getMethodName()
{
    if($this->_method===null)
    {
        // before PHP 5.6 php://input could be read only once
        // since PHP 5.6 $HTTP_RAW_POST_DATA is deprecated
        if(version_compare(PHP_VERSION, '5.6.0', '<') && isset($HTTP_RAW_POST_DATA))
            $request=$HTTP_RAW_POST_DATA;
        else
            $request=file_get_contents('php://input');
        if(preg_match('/<.*?:Body[^>]*>\s*<.*?:(\w+)/mi',$request,$matches))
            $this->_method=$matches[1];
        else
            $this->_method='';
    }
    return $this->_method;
}

protected function getOptions()
{
    $options=array();
    if($this->soapVersion==='1.1')
        $options['soap_version']=SOAP_1_1;
    elseif($this->soapVersion==='1.2')
        $options['soap_version']=SOAP_1_2;
    if($this->actor!==null)
        $options['actor']=$this->actor;
    $options['encoding']=$this->encoding;
    foreach($this->classMap as $type=>$className)
    {
        $className=Yii::import($className,true);
        if(is_int($type))
            $type=$className;
        $options['classmap'][$type]=$className;
    }
    return $options;
}

public function handleError($event)
{
    $event->handled=true;
    $message=$event->message;
    if(YII_DEBUG)
    {
        $trace=debug_backtrace();
        if(isset($trace[2]) && isset($trace[2]['file']) && isset($trace[2]['line']))
            $message.=' ('.$trace[2]['file'].':'.$trace[2]['line'].')';
    }
    throw new CException($message,self::SOAP_ERROR);
}

public function renderWsdl()
{
    $wsdl=$this->generateWsdl();
    header('Content-Type: text/xml;charset='.$this->encoding);
    header('Content-Length: '.(function_exists('mb_strlen') ? mb_strlen($wsdl,'8bit') : strlen($wsdl)));
    echo $wsdl;
}

public function run()
{
    header('Content-Type: text/xml;charset='.$this->encoding);
    if(YII_DEBUG)
        ini_set("soap.wsdl_cache_enabled",0);
    $server=new SoapServer($this->wsdlUrl,$this->getOptions());
    Yii::app()->attachEventHandler('onError',array($this,'handleError'));
    try
    {
        if($this->persistence!==null)
            $server->setPersistence($this->persistence);
        if(is_string($this->provider))
            $provider=Yii::createComponent($this->provider);
        else
            $provider=$this->provider;

        if(method_exists($server,'setObject'))
        {
            if (is_array($this->generatorConfig) && isset($this->generatorConfig['bindingStyle'])
                && $this->generatorConfig['bindingStyle']==='document')
            {
                $server->setObject(new CDocumentSoapObjectWrapper($provider));
            }
            else
            {
                $server->setObject($provider);
            }
        }
        else
        {
            if (is_array($this->generatorConfig) && isset($this->generatorConfig['bindingStyle'])
                && $this->generatorConfig['bindingStyle']==='document')
            {
                $server->setClass('CDocumentSoapObjectWrapper',$provider);
            }
            else
            {
                $server->setClass('CSoapObjectWrapper',$provider);
            }
        }

        if($provider instanceof IWebServiceProvider)
        {
            if($provider->beforeWebMethod($this))
            {
                $server->handle();
                $provider->afterWebMethod($this);
            }
        }
        else
            $server->handle();
    }
    catch(Exception $e)
    {
        if($e->getCode()!==self::SOAP_ERROR) // non-PHP error
        {
            // only log for non-PHP-error case because application's error handler already logs it
            // php <5.2 doesn't support string conversion auto-magically
            Yii::log($e->__toString(),CLogger::LEVEL_ERROR,'application');
        }
        $message=$e->getMessage();
        if(YII_DEBUG)
            $message.=' ('.$e->getFile().':'.$e->getLine().")\n".$e->getTraceAsString();

        // We need to end application explicitly because of
        // http://bugs.php.net/bug.php?id=49513
        Yii::app()->onEndRequest(new CEvent($this));
        $server->fault(get_class($e),$message);
        exit(1);
    }
}