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Edit File : log.rb \| Size : 3.99 KB
# frozen_string_literal: false #-- # log.rb -- Log Class # # Author: IPR -- Internet Programming with Ruby -- writers # Copyright (c) 2000, 2001 TAKAHASHI Masayoshi, GOTOU Yuuzou # Copyright (c) 2002 Internet Programming with Ruby writers. All rights # reserved. # # $IPR: log.rb,v 1.26 2002/10/06 17:06:10 gotoyuzo Exp $ module WEBrick ## # A generic logging class class BasicLog # Fatal log level which indicates a server crash FATAL = 1 # Error log level which indicates a recoverable error ERROR = 2 # Warning log level which indicates a possible problem WARN = 3 # Information log level which indicates possibly useful information INFO = 4 # Debugging error level for messages used in server development or # debugging DEBUG = 5 # log-level, messages above this level will be logged attr_accessor :level ## # Initializes a new logger for +log_file+ that outputs messages at +level+ # or higher. +log_file+ can be a filename, an IO-like object that # responds to #<< or nil which outputs to $stderr. # # If no level is given INFO is chosen by default def initialize(log_file=nil, level=nil) @level = level \|\| INFO case log_file when String @log = File.open(log_file, "a+") @log.sync = true @opened = true when NilClass @log = $stderr else @log = log_file # requires "<<". (see BasicLog#log) end end ## # Closes the logger (also closes the log device associated to the logger) def close @log.close if @opened @log = nil end ## # Logs +data+ at +level+ if the given level is above the current log # level. def log(level, data) if @log && level <= @level data += "\n" if /\n\Z/ !~ data @log << data end end ## # Synonym for log(INFO, obj.to_s) def <<(obj) log(INFO, obj.to_s) end # Shortcut for logging a FATAL message def fatal(msg) log(FATAL, "FATAL " << format(msg)); end # Shortcut for logging an ERROR message def error(msg) log(ERROR, "ERROR " << format(msg)); end # Shortcut for logging a WARN message def warn(msg) log(WARN, "WARN " << format(msg)); end # Shortcut for logging an INFO message def info(msg) log(INFO, "INFO " << format(msg)); end # Shortcut for logging a DEBUG message def debug(msg) log(DEBUG, "DEBUG " << format(msg)); end # Will the logger output FATAL messages? def fatal?; @level >= FATAL; end # Will the logger output ERROR messages? def error?; @level >= ERROR; end # Will the logger output WARN messages? def warn?; @level >= WARN; end # Will the logger output INFO messages? def info?; @level >= INFO; end # Will the logger output DEBUG messages? def debug?; @level >= DEBUG; end private ## # Formats +arg+ for the logger # # * If +arg+ is an Exception, it will format the error message and # the back trace. # * If +arg+ responds to #to_str, it will return it. # * Otherwise it will return +arg+.inspect. def format(arg) if arg.is_a?(Exception) "#{arg.class}: #{AccessLog.escape(arg.message)}\n\t" << arg.backtrace.join("\n\t") << "\n" elsif arg.respond_to?(:to_str) AccessLog.escape(arg.to_str) else arg.inspect end end end ## # A logging class that prepends a timestamp to each message. class Log < BasicLog # Format of the timestamp which is applied to each logged line. The # default is <tt>"[%Y-%m-%d %H:%M:%S]"</tt> attr_accessor :time_format ## # Same as BasicLog#initialize # # You can set the timestamp format through #time_format def initialize(log_file=nil, level=nil) super(log_file, level) @time_format = "[%Y-%m-%d %H:%M:%S]" end ## # Same as BasicLog#log def log(level, data) tmp = Time.now.strftime(@time_format) tmp << " " << data super(level, tmp) end end end Back

Edit File : log.rb | Size : 3.99 KB

# frozen_string_literal: false
#--
# log.rb -- Log Class
#
# Author: IPR -- Internet Programming with Ruby -- writers
# Copyright (c) 2000, 2001 TAKAHASHI Masayoshi, GOTOU Yuuzou
# Copyright (c) 2002 Internet Programming with Ruby writers. All rights
# reserved.
#
# $IPR: log.rb,v 1.26 2002/10/06 17:06:10 gotoyuzo Exp $

module WEBrick

##
  # A generic logging class

class BasicLog

# Fatal log level which indicates a server crash

FATAL = 1

# Error log level which indicates a recoverable error

ERROR = 2

# Warning log level which indicates a possible problem

WARN  = 3

# Information log level which indicates possibly useful information

INFO  = 4

# Debugging error level for messages used in server development or
    # debugging

DEBUG = 5

# log-level, messages above this level will be logged
    attr_accessor :level

##
    # Initializes a new logger for +log_file+ that outputs messages at +level+
    # or higher.  +log_file+ can be a filename, an IO-like object that
    # responds to #<< or nil which outputs to $stderr.
    #
    # If no level is given INFO is chosen by default

def initialize(log_file=nil, level=nil)
      @level = level || INFO
      case log_file
      when String
        @log = File.open(log_file, "a+")
        @log.sync = true
        @opened = true
      when NilClass
        @log = $stderr
      else
        @log = log_file  # requires "<<". (see BasicLog#log)
      end
    end

##
    # Closes the logger (also closes the log device associated to the logger)
    def close
      @log.close if @opened
      @log = nil
    end

##
    # Logs +data+ at +level+ if the given level is above the current log
    # level.

def log(level, data)
      if @log && level <= @level
        data += "\n" if /\n\Z/ !~ data
        @log << data
      end
    end

##
    # Synonym for log(INFO, obj.to_s)
    def <<(obj)
      log(INFO, obj.to_s)
    end

# Shortcut for logging a FATAL message
    def fatal(msg) log(FATAL, "FATAL " << format(msg)); end
    # Shortcut for logging an ERROR message
    def error(msg) log(ERROR, "ERROR " << format(msg)); end
    # Shortcut for logging a WARN message
    def warn(msg)  log(WARN,  "WARN  " << format(msg)); end
    # Shortcut for logging an INFO message
    def info(msg)  log(INFO,  "INFO  " << format(msg)); end
    # Shortcut for logging a DEBUG message
    def debug(msg) log(DEBUG, "DEBUG " << format(msg)); end

# Will the logger output FATAL messages?
    def fatal?; @level >= FATAL; end
    # Will the logger output ERROR messages?
    def error?; @level >= ERROR; end
    # Will the logger output WARN messages?
    def warn?;  @level >= WARN; end
    # Will the logger output INFO messages?
    def info?;  @level >= INFO; end
    # Will the logger output DEBUG messages?
    def debug?; @level >= DEBUG; end

private

##
    # Formats +arg+ for the logger
    #
    # * If +arg+ is an Exception, it will format the error message and
    #   the back trace.
    # * If +arg+ responds to #to_str, it will return it.
    # * Otherwise it will return +arg+.inspect.
    def format(arg)
      if arg.is_a?(Exception)
        "#{arg.class}: #{AccessLog.escape(arg.message)}\n\t" <<
        arg.backtrace.join("\n\t") << "\n"
      elsif arg.respond_to?(:to_str)
        AccessLog.escape(arg.to_str)
      else
        arg.inspect
      end
    end
  end

##
  # A logging class that prepends a timestamp to each message.

class Log < BasicLog
    # Format of the timestamp which is applied to each logged line.  The
    # default is <tt>"[%Y-%m-%d %H:%M:%S]"</tt>
    attr_accessor :time_format

##
    # Same as BasicLog#initialize
    #
    # You can set the timestamp format through #time_format
    def initialize(log_file=nil, level=nil)
      super(log_file, level)
      @time_format = "[%Y-%m-%d %H:%M:%S]"
    end

##
    # Same as BasicLog#log
    def log(level, data)
      tmp = Time.now.strftime(@time_format)
      tmp << " " << data
      super(level, tmp)
    end
  end
end

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