public function toString()
	{
		$lines	= array();
		$lines[]	= $this->protocol.'/'.$this->version.' '.$this->status;							//  add main protocol header
		$lines[]	= $this->headers->toString();													//  add header fields and line break
		if( strlen( $this->body ) )																	//  response body is set
			$lines[]	= $this->body;																//  add response body
		return join( "\r\n", $lines );																//  glue parts with line break and return result
	}