Forum: Ruby YAML in limbo?

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426d8be2204a36c4e609ace097d7c554?d=identicon&s=25 Ohad Lutzky (ohad)
on 2006-05-01 14:05
When I was writing a simple DNS Sniffer/IDS (for a university project),
I wanted to be able to export DNS responses to YAML, for later
comparison (to detect spoofing). The IPAddr class was widely used within
the project - however, its YAML export looks like this:

  irb(main):002:0> i ='')
  => #<IPAddr: IPv4:>
  irb(main):003:0> y i
  --- !ruby/object:IPAddr
  addr: 2130706433
  family: 2
  mask_addr: 340282366920938463463374607431768211455

After much effort, I figured out how to get it to export like this:

  --- !ruby/ipaddr

This was done with the following code:

  class IPAddr
    def to_yaml_type
    def to_yaml( opts = {} )
      YAML::quick_emit(self.object_id, opts) { |out|
        out << "#{to_yaml_type} "
        self.to_s.to_yaml(:Emitter => out)

  YAML.add_ruby_type(/^ipaddr/) { |type, val|

This works just fine in Ruby 1.8.3 (Syck 0.45), but b0rks completely in
1.8.4 (Syck 0.6). The +out+ stream no longer has a << operator, and
there is a pretty obvious error in the add_ruby_type method, which seems
to be unused.

Now, _why says that the new version is much smarter about these kinds of
things, but the documentation is currently [even more] lacking [than the
previous versions']. So my question splits into two parts:

- How can I make my code work in the new version? (preferably
- What's up with the docs?
4674615d2cf231975c741731be9a8685?d=identicon&s=25 why the lucky stiff (Guest)
on 2006-05-03 18:57
(Received via mailing list)
Ohad Lutzky wrote:

>      }
>to be unused.
Here's how you do it these days:

  class IPAddr
    yaml_as ",2002:ipaddr"
    def to_yaml(opts = {})
      YAML::quick_emit(object_id, opts) do |out|
        out.scalar(taguri, self.value, :plain)

I started doing RDoc for everything.  I keep forgetting to wrap it up.

426d8be2204a36c4e609ace097d7c554?d=identicon&s=25 Ohad Lutzky (ohad)
on 2006-05-04 10:28
why the lucky stiff wrote:
> Here's how you do it these days:
> ...
> I started doing RDoc for everything.  I keep forgetting to wrap it up.
> _why

Much thanks. That IS simpler... how do I handle the importing though?

(BTW you rule dude :) )
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