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# Time 2015-01-26 17:30:16
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# Author lizanle
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# Description 日志帮助类
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module SystemLogHelper
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class SystemLog
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class << self
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# Time 2015-01-26 17:29:17
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# Author lizanle
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# Description 分页（支持多关键字查询）
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def logo_data(page, per, search, day)
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logs = find_all_logs day
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if logs.empty? #如果返回的是空數組，就說明日誌文件不存在
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return logs
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end
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# 根据search参数来决定是否需要查询
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keywords = search
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if keywords && !keywords.strip.blank?
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# 把keywords转化成正则表达式数组
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keywords = keywords.strip.split(/\s+/).collect! { |w| Regexp.new(w, 'i') }
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# 一条记录应该匹配每个关键字 log =~ r 是对log记录进行判断是否符合r的正则表达式
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logs = logs.find_all do |log|
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keywords.all? { |r| log =~ r && !(log =~ Regexp.new("SystemLogController#",'i')) }
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end
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#用Kaminari分页
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logs = Kaminari.paginate_array(logs).page(page).per(per).collect! { |log| parse(log) }
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#将分页后的记录的搜索结果添加样式，样式中的\0是给给r占位置的。
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logs.collect! do |log|
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keywords.each { |r| log.gsub!(r, '<span class="search_results">\0</span>') }
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log
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end
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else
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logs = Kaminari.paginate_array(logs).page(page).per(per).collect! { |log| parse(log) }
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# 过滤掉日志中日志分析请求
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logs.collect! do |log|
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log = "" if log =~ Regexp.new("SystemLogController",'i')
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log
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end
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end
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logs
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end
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# Time 2015-01-26 17:28:57
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# Author lizanle
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# Description 清除日誌
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def clear day
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if File::exists?(logfile_path day)
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File.open(logfile_path(day), 'w') do |f|
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f.print ''
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end
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else
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end
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end
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# Time 2015-01-26 17:28:49
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# Author lizanle
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# Description 讀取日誌
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private
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def find_all_logs day
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if File::exists?(logfile_path day)
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File.open(logfile_path day) do |f|
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#打开文件，并按照正则表达式切分，逆序，最新一个记录可以扔掉（因为最新的记录永远都是访问System_log)
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f.read.split("Processing").reverse[1..-1]
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end
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else
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[]
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end
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end
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# Time 2015-01-26 17:28:34
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# Author lizanle
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# Description 日志文件的路径，一般在Rails.root/log下，根据环境配置
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# 依次记录到product.log development.log test.log中
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def logfile_path day
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#将日期处理成2015-01-01的形式
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unless day.nil?
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dayArr = day.split('-')
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if dayArr[1].length == 1
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dayArr[1] = "0" + dayArr[1]
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end
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if dayArr[2].length == 1
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dayArr[2] = "0" + dayArr[2]
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end
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day = dayArr.join('-')
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end
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#如果不是當天，則需要加後綴
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if !day.nil? && !day.strip.blank? && day != Time.now.strftime("%Y-%m-%d")
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File.join(Rails.root, "log", "#{Rails.env}.log.#{day.gsub('-', '')}")
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else
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File.join(Rails.root, "log", "#{Rails.env}.log")
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end
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end
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# Time 2015-01-26 17:28:22
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# Author lizanle
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# Description 替換換行符
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def parse(log)
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ERB::Util.html_escape(log.gsub(/\e\[[\d;m]+/, '')).gsub("\n", "<br/>")
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end
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# Time 2015-01-26 17:28:07
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# Author lizanle
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# Description 定义响应正则表达式 2015-01-20 11:31:13 INFO -- Completed 200 OK in 125ms (Views: 81.0ms | ActiveRecord: 2.0ms)
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def response_regex
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'Completed \d+ \w+ in (\d+)ms \(Views: (\d+\.\d+)?ms \| ActiveRecord: (\d+\.\d+)?ms\)'
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end
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# Time 2015-01-26 17:27:51
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# Author lizanle
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# Description 将一条记录中的地址主机等都分析出来
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def get_status(paragraph)
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request_regex = 'Started GET \"(\/.*)\" for ([\d]+\.[\d]+\.[\d]+\.[\d]+) at [\d]*-([\d]*-[\d]* [\d]*:[\d]*:[\d]*)'
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controller_regex = 'Processing by ([\w]+#[\w]+)'
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page_time_regex = 'Views: \d+(\.\d+)?ms'
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activeRecord_time_regex = 'ActiveRecord: \d+(\.\d+)?ms'
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#解析请求中的正则，主机，时间
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if paragraph.match(request_regex) != nil
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request_url = paragraph.match(request_regex)[1] #正则表达式中的括号能够截取成数组
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request_host = paragraph.match(request_regex)[2]
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request_at = paragraph.match(request_regex)[3]
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end
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#解析控制器
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if paragraph.match(controller_regex) != nil
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controller_name = paragraph.match(controller_regex)[1]
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end
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#解析响应时间以及计算百分比
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if paragraph.match(response_regex) != nil
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#print(paragraph.match(response_regex))
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total_time = paragraph.match(response_regex)[1]
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page_time = paragraph.match(response_regex)[2]
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activeRecord_time = paragraph.match(response_regex)[3]
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page_time_percent = page_time.to_f/(total_time.to_f)
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activeRecord_time_percent = activeRecord_time.to_f/(total_time.to_f)
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else
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end
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#将解析结果当做一条记录数组返回
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request_status = [request_url, request_host, request_at,
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controller_name, total_time, page_time, page_time_percent, activeRecord_time, activeRecord_time_percent]
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request_status
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end
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# Time 2015-01-26 16:41:51
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# Author lizanle
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# Description 分析日志
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public
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def analysis day
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csv = Array.new
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#如果文件不存在，则直接返回空数组
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if File::exists?(logfile_path day)
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File.open(logfile_path(day), "r:utf-8") do |file|
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paragraph = ""
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begin_flag = false
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# 对每一行进行判断
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file.each do |line|
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# 以"Started GET "开头为一个paragraph
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#print(line.match('[\d]*-([\d]*-[\d]* [\d]*:[\d]*:[\d]*) INFO -- Started GET ') == nil)
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if (line.match('[\d]*-([\d]*-[\d]* [\d]*:[\d]*:[\d]*) \w+ -- Started GET ') != nil)
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if !begin_flag
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begin_flag = true
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paragraph.concat(line)
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else
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# 另一个paragraph的开头
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if (paragraph.match(response_regex) != nil)
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csv << get_status(paragraph)
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end
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begin_flag = true
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paragraph = line
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end
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else
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if begin_flag
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paragraph.concat(line)
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else
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end
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end
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end
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end
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end
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csv
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end
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end
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end
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end
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