/**
* 获得主机信息，包含协议信息，主机名，访问端口信息
*
* <pre>Example:
* 请求: http://www.tintsoft.com/example/index.php?a=test
* 返回： http://www.tintsoft.com/
* </pre>
*
* @throws Base_Exception 获取主机信息失败的时候抛出异常
*/
private static function _init_host_info()
{
if (($http_host = self::get_server('HTTP_HOST')) != null) {
self::$_host_info = self::get_scheme() . '://' . $http_host;
} elseif (($http_host = self::get_server('SERVER_NAME')) != null) {
self::$_host_info = self::get_scheme() . '://' . $http_host;
if (($port = self::get_server_port()) != null) {
self::$_host_info .= ':' . $port;
}
} else {
throw new Base_Exception('[Base.Base_Request._init_host_info] determine the entry script URL failed!!');
}
}
