sakura79 (bin liu)

Cookpad 微服务经验总结

sakura79 — Thu, 17 Mar 2016 18:10:44 +0800

Cookpad 公司应该有些人已经知道了吧，日本最大的在线食谱分享网站，Rails 典型用户，开源了很多组件。

这是其最近一期关于 Rails 和微服务的经验分享，其中提到了几个他们用到的技术，可以参考下。这里不搬运原文了，只贴个链接：

http://liubin.org/blog/2016/03/16/microservice-at-cookpad/

expeditor Expeditor provides asynchronous execution and fault tolerance for microservices
sentry Sentry is cross-platform crash reporting built with love https://getsentry.com
Garage Rails extension for RESTful Hypermedia API
Pact Enables consumer driven contract testing, providing a mock service and DSL for the consumer project, and interaction playback and verification for the service provider project.
Hako Deploy Docker container

又一个文件上传组件 refile

sakura79 — Tue, 06 Jan 2015 14:47:47 +0800

https://github.com/elabs/refile

Refile is a modern file upload library for Ruby applications. It is simple, yet powerful.

Features:

Configurable backends, file system, S3, etc...
Convenient integration with ORMs
On the fly manipulation of images and other files
Streaming IO for fast and memory friendly uploads
Works across form redisplays, i.e. when validations fail, even on S3
Effortless direct uploads, even to S3

The Ruby Web Benchmark Report

sakura79 — Wed, 16 Jul 2014 18:29:07 +0800

一个比较全的性能测试，仅供参考。

http://www.madebymarket.com/blog/dev/ruby-web-benchmark-report.html

Agent: Go-Like Concurrency in Ruby

sakura79 — Wed, 25 Jun 2014 16:09:06 +0800

有点意思，就是不知道性能和稳定性怎样。看 GitHub 貌似项目开始挺早了。

http://www.sitepoint.com/agent-go-like-concurrency-ruby/

require 'agent'

chan = channel!(Integer)

go! do
  #the program should only end
  #when this goroutine ends
  sleep 10

  puts "Hello, world!"
  chan << 1
end

puts chan.receive.first

项目主页：https://github.com/igrigorik/agent

被这个编码问题打败了

sakura79 — Sat, 22 Mar 2014 14:52:10 +0800

同样的代码和测试网页，在 Mac 下能用，在 Ubuntu 就出错。两台机器都是 Ruby2.0.0，locale 设置也一样。

用 Hpricot 解析网页。

网页是 gb2312 编码的，读取的时候转为 UTF-8 了。

y = Iconv.iconv("UTF-8//IGNORE", "gb2312",f.read)[0]

irb(main):069:0> y.encoding => #Encoding:UTF-8

irb(main):070:0> d1 = Hpricot(y) ArgumentError: invalid byte sequence in US-ASCII from /usr/local/lib/ruby/gems/2.0.0/gems/hpricot-0.8.6/lib/hpricot/builder.rb:10:in gsub' from /usr/local/lib/ruby/gems/2.0.0/gems/hpricot-0.8.6/lib/hpricot/builder.rb:10:inuxs' from /usr/local/lib/ruby/gems/2.0.0/gems/hpricot-0.8.6/lib/hpricot/inspect.rb:63:in block (2 levels) in pretty_print_stag' from /usr/local/lib/ruby/gems/2.0.0/gems/hpricot-0.8.6/lib/hpricot/inspect.rb:60:ineach' from /usr/local/lib/ruby/gems/2.0.0/gems/hpricot-0.8.6/lib/hpricot/inspect.rb:60:in block in pretty_print_stag' from /usr/local/lib/ruby/2.0.0/prettyprint.rb:381:ingroup' from /usr/local/lib/ruby/gems/2.0.0/gems/hpricot-0.8.6/lib/hpricot/inspect.rb:56:in pretty_print_stag' from /usr/local/lib/ruby/gems/2.0.0/gems/hpricot-0.8.6/lib/hpricot/inspect.rb:41:inblock in pretty_print' from /usr/local/lib/ruby/2.0.0/prettyprint.rb:381:in group' from /usr/local/lib/ruby/gems/2.0.0/gems/hpricot-0.8.6/lib/hpricot/inspect.rb:40:inpretty_print' from /usr/local/lib/ruby/2.0.0/pp.rb:155:in block in pp' from /usr/local/lib/ruby/2.0.0/prettyprint.rb:381:ingroup' from /usr/local/lib/ruby/2.0.0/pp.rb:155:in pp' from /usr/local/lib/ruby/gems/2.0.0/gems/hpricot-0.8.6/lib/hpricot/inspect.rb:47:inblock (2 levels) in pretty_print' from /usr/local/lib/ruby/gems/2.0.0/gems/hpricot-0.8.6/lib/hpricot/inspect.rb:47:in each' from /usr/local/lib/ruby/gems/2.0.0/gems/hpricot-0.8.6/lib/hpricot/inspect.rb:47:inblock in pretty_print' ... 11 levels...

从出错信息看，貌似当 US-ASCII 处理了？

大家以后找工作看看他家主页是不是 UTF-8 编码的，不是的话再斟酌一下吧。

另外这个 Hpricot 项目已经被 closed 了，大家还是用 nokogiri 吧。

Dave Thomas: Agile Is Dead (Long Live Agility)

sakura79 — Wed, 12 Mar 2014 16:39:37 +0800

http://pragdave.me/blog/2014/03/04/time-to-kill-agile/

说的太给力了。

我给敏捷的定义是：一切能提高效率的努力都算敏捷；有方法，但没有方法论。

rpush The push notification service for Ruby.

sakura79 — Wed, 19 Feb 2014 09:29:27 +0800

https://github.com/rpush/rpush 没用过，看起来还行。

对 Regexp 和 MatchData 的一个问题

sakura79 — Thu, 23 Jan 2014 18:36:29 +0800

代码如下，比如想把 ab+ 的都找出来，比如 gsub 的例子里，都替换成大写的了；但是怎么从 MatchData 实例里得到第 n（n>1）组匹配结果的信息呢？类似 php 或者 Java 那样，能取得每组匹配的信息？

类似这个问题：https://www.ruby-forum.com/topic/1435305

irb(main):146:0> a="abbcdefgabbbbcdefg"
=> "abbcdefgabbbbcdefg"
irb(main):147:0> b = a.gsub(/(ab+)/){|y| y.upcase}
=> "ABBcdefgABBBBcdefg"
irb(main):148:0> a="abbcdefgabbbbcdefg"
=> "abbcdefgabbbbcdefg"
irb(main):149:0> x =/(ab+)/.match a
=> #<MatchData "abb" 1:"abb">
irb(main):150:0> x[0]
=> "abb"
irb(main):151:0> x[1]
=> "abb"
irb(main):152:0> x[2]
=> nil
irb(main):153:0> x.length
=> 2
irb(main):154:0> x.offset 1
=> [0, 3]
irb(main):155:0> x.offset 0
=> [0, 3]

最近老遇到 Zlib::BufError

sakura79 — Wed, 23 Oct 2013 16:37:13 +0800

无论是 windows 还是 mac 下，用 net::http 抓去网页老出这个问题。

windows 下一会就出，mac 下一般一天出一次。。。

有遇到过的么？