<?php

namespace yiins\web;

use CException;
use yiins\exceptions\InvalidConfigException;
use yiins\Yii;

class Request extends \CHttpRequest
{
    private $_scriptUrl = null;

    public function getScriptUrl()
    {
        if ($this->_scriptUrl === null) {
            try {
                $this->_scriptUrl = parent::getScriptUrl();
            } catch (CException $e) {
                $scriptName = str_replace('\\', '/', $_SERVER['SCRIPT_FILENAME']);
                if (isset($_SERVER['DOCUMENT_ROOT']) && strpos($scriptName, $_SERVER['DOCUMENT_ROOT']) === 0) {
                    $this->_scriptUrl = str_replace($_SERVER['DOCUMENT_ROOT'], '', $scriptName);
                } else {
                    throw new InvalidConfigException(Yii::t('yii',
                        'CHttpRequest is unable to determine the entry script URL.'));
                }
            }
        }
        return $this->_scriptUrl;
    }
}