IRC, HEAD instead GET and const_missing

2009-07-03T00:00:00-07:00

Today I started use IRC again, and joined only 2 channels for now: #ruby and #rails. The network is freenode.net, and my nickname is my name, daviscabral :)

Well, ruby is not my speciality, and I think I should study more and read more about, like Web, HTTP protocol, etc. IRC is a good place to see all kind of doubts and answer as you can, if you can.

GET? No, your fu*ng idiot! Use HEAD!

Well, there I knew a man from Portugal, with a doubt about test if a page exist without get all content. Until that momment, I just imagined one way, GET requests, but this always return all the page body (and this makes senses, was my original request).

In my humble ignorance, I asked about the process, if he already tried with Net::HTTP, OpenURI, and started search more about to know what can be done to help – the best way to learn, is solving problems – and if you don’t have problems, call me, I’ll give you a box full of them.

So, a few minutes later, after ate a pizza, a very nice guy from #ruby, send something like: “good lord, noobs – just use HEAD instead GET”. (pause) (breath) Ok, I agree, #FAIL, a big lapse here. I felt like a Home Simpson. But is done :)

Bellow the code that I used to test this:

Net::HTTP – Intro how to test if a page exists

  require 'net/https'

  url = URI.parse("http://www.google.com.br/")
  res = Net::HTTP.new(url.host, url.port).start {|http| http.head(url.path) }
  p res

const_missing – Auto loading feature

Some time before the scene above, other guy showed a code with a problem related with const_missing call. I didn’t know about it, and looked directly in the api doc and google. Was a small fix there to do work, but the main code idea almost working is bellow.

test.rb

module Test
    class Core
        def call(env)
            Test::Foo::Bar::Bla.new(env).process()
        end
    end

    module Foo
        def Foo.const_missing(name)
            # look in the core folder for autoloading the file
            File.open('./autoload.log', 'w') {|f| f.write('Autoloading '+name.to_s) }
            str_name = name.to_s
            require 'core/'+str_name.downcase
            klass = const_get(name)
            return klass if klass
            raise "Class not found: #{name}"
        end
    end
end

foo/bla.rb

module Test
  module Foo
    class Bla
      def initialize(env)
      end
    end
  end
end

Well, that’s all for now.

Moving forward

2009-06-30T00:00:00-07:00

Well, wrinting some stuff again… After a while away, I’ll came back soon with more projects and papers, I hope. For now, just an update to log my decision: write more open source codes!

I’m writing now a kind of game using GitHub API and some other stuff. Should be simple, but nice to play with haml and sphinx. Need improve my knowledge about it right now.

Keep (moon)walking ;)

First post!

2009-05-11T00:00:00-07:00

Here is my space to talk about my personal open source projects hosted in the awesome GitHub! :-) My main idea with this blog is give a chance to document and discuss the features and ideas for many future projects.

Keep in touch!

Davis Cabral at GitHub