如何把提取出来的 hash.dig('media_info', 'format', 'duration') 再相加，得出一个总数呢？

👍，简洁了好多。我以为 $2 需要转换成 String 才能用 gsub 方法。

移除第二个循环，具体是指？

#1 楼 @liprais 是的，看上去简单，实现过程挺折腾，估计基础的东西还是不熟练

#2 楼 @doitian 感谢，我测试了一下，用正则匹配，然后分组，直接输出第二个分组，按照你的建议修改了一下，看来好多了。😊

File.open('kafka_log', 'r') do |f|
    f.each do |line|
        re = /(kafka:)({.+}(?=",))+/
        match_data = re.match(line)
        unless match_data.nil?
            data = JSON.parse($2.to_s.gsub("\\", ''))
            puts data["media_info"]["format"]["duration"]
        end
    end
end

现在又拍支持一键申请 Let’s Encrypt 证书，并且能够自动续期，还蛮不错的。

#93 楼 @huacnlee 貌似服务器是不是有问题，请求超时了

☁  ~  http head https://gems.ruby-china.org/specs.4.8.gz

http: error: Request timed out (30s).

I, [2016-03-16T12:38:09.627165 #37]  INFO -- : > gem sources --add https://gems.ruby-china.org/ --remove https://rubygems.org/
I, [2016-03-16T12:39:38.621329 #37]  INFO -- : Error fetching https://gems.ruby-china.org/:
    server did not return a valid file (https://gems.ruby-china.org/specs.4.8.gz)

I, [2016-03-16T12:39:38.622425 #37]  INFO -- : Terminating async processes
I, [2016-03-16T12:39:38.622530 #37]  INFO -- : Sending INT to HOME=/var/lib/postgresql USER=postgres exec chpst -u postgres:postgres:ssl-cert -U postgres:postgres:ssl-cert /usr/lib/postgresql/9.3/bin/postmaster -D /etc/postgresql/9.3/main pid: 66
I, [2016-03-16T12:39:38.622655 #37]  INFO -- : Sending TERM to exec chpst -u redis -U redis /usr/bin/redis-server /etc/redis/redis.conf pid: 194
2016-03-16 12:39:38 UTC [66-2] LOG:  received fast shutdown request
2016-03-16 12:39:38 UTC [66-3] LOG:  aborting any active transactions
2016-03-16 12:39:38 UTC [73-2] LOG:  autovacuum launcher shutting down
2016-03-16 12:39:38 UTC [70-1] LOG:  shutting down
194:signal-handler (1458131978) Received SIGTERM scheduling shutdown...
194:M 16 Mar 12:39:38.652 # User requested shutdown...
194:M 16 Mar 12:39:38.653 * Saving the final RDB snapshot before exiting.
2016-03-16 12:39:38 UTC [70-2] LOG:  database system is shut down
194:M 16 Mar 12:39:38.710 * DB saved on disk
194:M 16 Mar 12:39:38.710 # Redis is now ready to exit, bye bye...


FAILED
--------------------
RuntimeError: gem sources --add https://gems.ruby-china.org/ --remove https://rubygems.org/ failed with return #<Process::Status: pid 287 exit 1>
Location of failure: /pups/lib/pups/exec_command.rb:105:in `spawn'
exec failed with the params {"cmd"=>["gem sources --add https://gems.ruby-china.org/ --remove https://rubygems.org/"]}
4d3a9a5937702a71e03afd53cf92ca6870fe1ddfb48c225852659f158375a719
** FAILED TO BOOTSTRAP ** please scroll up and look for earlier error messages, there may be more than one

#6 楼 @adamshen 我也有过类似的设想，不过不是临终，就是帮助别人实现愿望。很多人一辈子做不到的事情，可能在某些人看来只是举手之劳。

yes,we can 的梗好像没人笑嘛

#2 楼 @king1990_cool 我吧 subt() 方法里的两个 puts 去掉，程序通了...

#2 楼 @king1990_cool 我刚测试了，确实为空，为啥呢，没搞明白。subt('123'') 的返回值应该是字符串，把字符串赋给一个变量，然后输出，应该还是字符串本身才对吧。设计了一个验证的方法对比下：

irb(main):001:0> def test(x)
irb(main):002:1> x = x + 1
irb(main):003:1> end
=> nil
irb(main):004:0> test(3)
=> 4
irb(main):005:0> t = test(3)
=> 4
irb(main):006:0> puts t
4
=> nil
irb(main):007:0>

调试了一下，发现调用了，但是只调用了前半句，后半句没执行，语法问题？

#8 楼 @lb563 你是说把原始数据转换成 json，然后处理么？

#5 楼 @blacktulip 非常感谢，这个方法简洁多了。

#4 楼 @africwildman 确实是的，有回车，我是先转成数据，把域名单独提取出来。

解决了，虽然丑陋，但是至少能运行了：）

#!/usr/bin/ruby
# -*- coding: UTF-8 -*-

require 'net/dns'

def dig_dns(url)
    packet = Net::DNS::Resolver.start("#{url}")
    packet.answer
end

filename = ARGV[0]
file = File.open(filename)

file.each_line do |line|
    p dig_dns(line.split("\n")[0])[0]
end
   file.close

#1 楼 @lyfi2003 感谢回复，把方法放到前面之后，确实没有上面的报错了，但是程序还是没通。

#!/usr/bin/ruby
# -*- coding: UTF-8 -*-

require 'net/dns'

def dig_dns(url)
    packet = Net::DNS::Resolver.start("#{url}")
    packet.answer
end

filename = ARGV[0]
file = File.open(filename)

file.each_line do |line|
    p dig_dns("#{line}")[0]
end

file.close

修改之后，执行提示「参数错误」，没看出来错在哪里，能否指点一下？

/Library/Ruby/Gems/2.0.0/gems/net-dns-0.8.0/lib/net/dns/resolver.rb:1227:in `valid?': Invalid domain name i.yousjz.com (ArgumentError)
        from /Library/Ruby/Gems/2.0.0/gems/net-dns-0.8.0/lib/net/dns/resolver.rb:1132:in `make_query_packet'
        from /Library/Ruby/Gems/2.0.0/gems/net-dns-0.8.0/lib/net/dns/resolver.rb:968:in `query'
        from /Library/Ruby/Gems/2.0.0/gems/net-dns-0.8.0/lib/net/dns/resolver.rb:871:in `search'
        from /Library/Ruby/Gems/2.0.0/gems/net-dns-0.8.0/lib/net/dns/resolver.rb:134:in `start'
        from chongfu.rb:10:in `dig_dns'
        from chongfu.rb:20:in `block in <main>'
        from chongfu.rb:19:in `each_line'
        from chongfu.rb:19:in `<main>'