默认情况下，标准库http软件包日志记录到stdout，我可以禁用它吗？

Question

When using the built-in http module in Go, I notice that http.ListenAndServe() will make logging calls to stdout by default. The main thing showing up in my terminal is:

http: TLS handshake error from x.x.x.x:x: tls: client offered an unsupported, maximum protocol version of 301.

Now I understand what this error is and what causes it, but the fact of the matter is, I don't particularly care.

How can I stop the http package (or ListenAndServe(), whatever) from logging to stdout by default? It's clogging up my pretty console. I'm 95% certain that I'm not the one logging the messages as all of the logs I have setup have "INFO", "WARNING" etc prefixes on them.

Answer 1

It doesn't log to stdout, it logs to the http server's ErrorLog if it's set, and to the standard logger (the one used by the non-method functions in log) otherwise. If you have a logger already, construct a http.Server with that logger as its ErrorLog and call ListenAndServe on that. Otherwise use log.SetOutput to change the destination of the standard log.