serverUrl,
			$this -> appId,
			$this -> partner_private_key,
			$this -> format,
			$this -> charset
		);
		$response = null;
		$outputStream = null;
		$request = $alipayClient -> getContents() ;
		//200
		//echo( '状态码:'. $request -> getCode() .', ');
		//echo '
';
		$fileType = $request -> getType();
		//echo( '类型:'. $fileType .', ');
		if( $fileType == 'text/plain'){
			//出错,返回 json
			echo $request -> getBody();
		}else{
			$type = $request -> getFileSuffix( $fileType );
			//echo $this -> getParams();
			//exit();
			//返回 文件流
			header("Content-type: ". $fileType ); //类型
			header("Accept-Ranges: bytes");//告诉客户端浏览器返回的文件大小是按照字节进行计算的
			header("Accept-Length: ". $request -> getContentLength() );//文件大小
			header("Content-Length: ". $request -> getContentLength() );//文件大小
			header('Content-Disposition: attachment; filename="'. time() .'.'. $type .'"'); //文件名
			echo $request -> getBody() ;
			exit ( ) ;
		}
		//echo( '内容: , '. $request -> getContentLength()  );
		//echo '
';
		//echo  '参数:';
		//echo ($request -> getParams());
		//echo '
' ;
	}
}
//  测试
$test1 = new TestImage();
$test1 -> load();