Robuta

https://www.php.net/manual/zh/swoole-http-response.sendfile.php

PHP: Swoole\Http\Response::sendfile - Manual

Send file through the HTTP response.

http response php swoole sendfile manual

https://docs.oracle.com/cd/E19146-01/820-6606/6nhu1t8kd/index.html

sendfile() Function (Sun Java System Web Server 7.0 Update 4 NSAPI Developer's Guide)

sun java system web server sendfile function update