better_way.rb

@user = User.find_by(file_number: ENV['FILE_NUMBER'])

@current_message = ''
@current_data = ''

while(data = @current_data.to_s + STDIN.read(100).to_s)
  @current_data = ''
  data.each_line do |line|
    if line.match(/\n$/)
      if line.match(/^\d{2}\/\d{2}\s\d{2}:\d{2}:\d{2}\.\d{2}\s/)
        UnimaticMessage.create user: @user, data: @current_message
        @current_message = line
      else
        @current_message += line
      end
    else
      @current_data = line
    end
  end
  sleep 0.25
end  

EVEN_BETTER_WAY.rb

@current_data = ''

while(data = @current_data.to_s + STDIN.read(100).to_s)
  @current_data = ''
  
  messages = data.lines.slice_before(/^\d{2}\/\d{2}/).collect(&:join)

  messages.each do |message|
    if message.join.match(/\n$/)
      UnimaticMessage.create user_id: ENV['DB_USER_ID'], data: message
    else
      @current_data = ''
    end
  end
  sleep 0.25
end

OLD_INCORRECT_BAAADD_WAY.rb

@user = User.find_by(file_number: ENV['FILE_NUMBER'])

@current_line = ''

while(STDIN)
  begin
    if(line = STDIN.readline)
      if line.match(/^\d{2}\/\d{2}\s\d{2}:\d{2}:\d{2}\.\d{2}\s/)
        #@lines.push @current_line
        UnimaticMessage.create data: @current_line
        @current_line = line
      else
        @current_line += line
      end
      #print "#{@line_position += 1}: "
      #print line
    end
    #puts "\n"*10
    #puts @lines.inspect
  rescue EOFError
  end
end