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Module: WEBrick::AccessLog

Relationships & Source Files
Namespace Children
Exceptions:
AccessLogError
Defined in: lib/webrick/accesslog.rb

Overview

AccessLog provides logging to various files in various formats.

Multiple logs may be written to at the same time:

access_log = [
  [$stderr, WEBrick::AccessLog::COMMON_LOG_FORMAT],
  [$stderr, WEBrick::AccessLog::REFERER_LOG_FORMAT],
]

server = WEBrick::HTTPServer.new :AccessLog => access_log

Custom log formats may be defined. AccessLog provides a subset of the formatting from Apache's mod_log_config httpd.apache.org/docs/mod/mod_log_config.html#formats. See .setup_params for a list of supported options

Constant Summary

Class Method Summary

Class Method Details

.escape(data) (mod_func)

Escapes control characters in data

[ GitHub ] 

  


# File 'lib/webrick/accesslog.rb', line 150



def escape(data)
  if data.tainted?
    data.gsub(/[[:cntrl:]\\]+/) {$&.dump[1...-1]}.untaint
  else
    data
  end
end


  








  

    .format(format_string, params)   (mod_func)
  



  

    

Formats params according to format_string which is described in setup_params.


  



  [ GitHub ]


  

  


# File 'lib/webrick/accesslog.rb', line 122



def format(format_string, params)
  format_string.gsub(/\%(?:\{(.*?)\})?>?([a-zA-Z%])/){
     param, spec = $1, $2
     case spec[0]
     when ?e, ?i, ?n, ?o
       raise AccessLogError,
         "parameter is required for \"#{spec}\"" unless param
       (param = params[spec][param]) ? escape(param) : "-"
     when ?t
       params[spec].strftime(param || CLF_TIME_FORMAT)
     when ?p
       case param
       when 'remote'
         escape(params["i"].peeraddr[1].to_s)
       else
         escape(params["p"].to_s)
       end
     when ?%
       "%"
     else
       escape(params[spec].to_s)
     end
  }
end


  








  

    .setup_params(config, req, res)   (mod_func)
  



  

    

This format specification is a subset of mod_log_config of Apache:


%a



Remote IP address


%b



Total response size


%evariable



Given variable in ENV


%f



Response filename


%h



Remote host name


%headeri



Given request header


%l



Remote logname, always “-”


%m



Request method


%attrn



Given request attribute from req.attributes


%headero



Given response header


%p



Server's request port


%.formatp



The canonical port of the server serving the request or the actual port or the client's actual port.  Valid formats are canonical, local or remote.


%q



Request query string


%r



First line of the request


%s



Request status


%t



Time the request was received


%T



Time taken to process the request


%u



Remote user from auth


%U



Unparsed URI


%%



Literal %




  



  [ GitHub ]


  

  


# File 'lib/webrick/accesslog.rb', line 94



def setup_params(config, req, res)
  params = Hash.new("")
  params["a"] = req.peeraddr[3]
  params["b"] = res.sent_size
  params["e"] = ENV
  params["f"] = res.filename || ""
  params["h"] = req.peeraddr[2]
  params["i"] = req
  params["l"] = "-"
  params["m"] = req.request_method
  params["n"] = req.attributes
  params["o"] = res
  params["p"] = req.port
  params["q"] = req.query_string
  params["r"] = req.request_line.sub(/\x0d?\x0a\z/o, '')
  params["s"] = res.status       # won't support "%>s"
  params["t"] = req.request_time
  params["T"] = Time.now - req.request_time
  params["u"] = req.user || "-"
  params["U"] = req.unparsed_uri
  params["v"] = config[:ServerName]
  params
end