From: Adam Block <adam@...>
Date: 2006-10-22T09:26:01+09:00
Subject: Re: Turning off WEBRick server logging (XMLRPC)

Thanks for your response. Yes, I see in the XMLRPC::Server source the 
following:

XMLRPC::Server#initialize(port=8080, host="127.0.0.1", maxConnections=4, 
stdlog=$stdout, audit=true, debug=true, *a)

So I put in my code

server = XMLRPC::Server.new(3001, "127.0.0.1", 4, 
"/tmp/xmlrpcserver.log")

And log output like this DOES go there:

[2006-10-21 16:51:08] INFO  WEBrick 1.3.1
[2006-10-21 16:51:08] INFO  ruby 1.8.5 (2006-08-25) [i686-darwin8.7.3]
[2006-10-21 16:51:39] INFO  WEBrick::HTTPServer#start: pid=4475 
port=2001

But the access log lines:

localhost - - [21/Oct/2006:16:33:48 PDT] "POST /RPC2 HTTP/1.1" 200 125
- -> /RPC2

STILL appear on my console (presumably STDOUT).

Indeed, you can see that the two entry types have different time 
formats. When I debug the XMLRPC::Server.server.logger.time_format, it's 
time_format -- [%Y-%m-%d %H:%M:%S]' -- matches the one that's going to 
the right place. So where are the access logs coming from, and how can I 
get them under control?

I asked myself.

Looking at the xmlrpc/server.rb source, we see the answer:

630 class Server < WEBrickServlet
632 def initialize(port=8080, host="127.0.0.1", maxConnections=4,
                   stdlog=$stdout, audit=true, debug=true, *a)
633   super(*a)
634   require 'webrick'
635   @server = WEBrick::HTTPServer.new(:Port => port, :BindAddress => 
host,
                                        :MaxClients => maxConnections,
636                                     :Logger => 
WEBrick::Log.new(stdlog))
637   @server.mount("/", self)
638 end

When the WEBrick server is created, it's not passed anything for the 
access log, so it's presumably using the default. Looking at the 
webrick/httserver source, I find:

33    unless @config[:AccessLog]
34      @config[:AccessLog] = [
35        [ $stderr, AccessLog::COMMON_LOG_FORMAT ],
36        [ $stderr, AccessLog::REFERER_LOG_FORMAT ]
37      ]
38    end

So that's the culprit -- and it's STDERR, not STDOUT.

Looks like to make this work I'll have to modify lines 632 and 636 of 
xmlrpc/server, which I'd rather not do. But at least I understand the 
source of the problem.

Thanks again for your help.

/adam

> When you create your webrick httpserver instance, one of the paramters
> that can be given is :AccessLog.  This defaults to stderr if you don't
> specify it.  You can use this to change the logging destination for the
> access logging.
> 
> There is also a :Logger setting that contains the logging destination 
> for
> the other logging messages.
> 
> 
> Kirk Haines

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