From: Hiroshi Nakamura <nakahiro@...>
Date: 2011-01-14T21:05:34+09:00
Subject: [ruby-core:34496] Re: [Ruby 1.9-Bug#3869] Logger#log does not handle or escape new-line characters.

Hal, sorry for not responding long time.

On Thu, Jan 13, 2011 at 16:09, Motohiro KOSAKI <redmine@ruby-lang.org> wrote:
> Hal nahi-san, It this good enough?

KOSAKI-san, thanks for picking up this issue and creating the patch.
But I don't think it's good to escape strings for logging because;
Logger is originally created for logging arbitrary bytes for
post-mortem analysis by human, not for live monitoring nor auditing.
So I don't think I need to escape things for parsing.

I know users often use logfiles for live monitoring, scanning /ERROR/
each minutes for example, but it's OK to pick false-positive incidents
for that purpose I believe. If it's not OK, we can use syslog or
auditing with DB or CSV formatted file. Beside this, we can use
Logger#formatter= for that purpose: logger.formatter = proc {|*args|
CSV.generate_line(args)}

That said, I understand users could use Logger for those kinds of
unexpected purposes. Hal, it would help me a great deal if you can
provide me a warning message "Take care for using these purpose" or
something, for adding to RDoc of Logger, based on your logging
purpose. Can you?

Regards,
// NaHi