Re: [Rubycocoa-talk] Tidy + RubyCocoa: Error triggered in dl/import.rb

[Avram L. <aj...@gm...>]

Update:

I haven't been able to track down why I can't dynamically load
libraries when using RubyCocoa, but I did find a fix for my specific
needs.

The Tidy gem works just like the NSXMLDocument contructor when used
with the NSXMLDocumentTidyHTML option, so I was able to just replicate
the gem's functionality using equivalent Obj-C calls. Code follows.

Since the Tidy library (but not gem) is installed by default on Macs,
this makes me wonder if the error I listed in my original post
(.../dl/import.rb:126:in `symbol': can't find the symbol `tidyCreate'
(RuntimeError)), was in fact because libtidy.dylib was already loaded.
Is that a possibility?

Hope this workaround helps anyone else who finds herself in my situation.

Avram

(workaround code)
        # Here we need to act like we use Tidy, without using it
        def tidy_up_html(html)
                data = OSX::NSData.dataWithRubyString(html)
                document =
OSX::NSXMLDocument.alloc.initWithData_options_error(data,
OSX::NSXMLDocumentTidyHTML, nil)
                ns_data = document.XMLData
                cleaned = ns_data.rubyString
                cleaned
        end


On Feb 3, 2008 5:31 PM, Avram Lyon <aj...@gm...> wrote:
> I'm working on a RubyCocoa front-end for a Ruby library I wrote to
> access a certain web forum. The library uses the Tidy gem to normalize
> the messy HTML it gets from the web server before using REXML to parse
> out the needed content. This works fine for me when I'm using plain
> old Ruby, but when I call:
>
> Tidy.path=LOCAL_TIDY_LIB_PATH
>
> from my RubyCocoa app, I get a RuntimeError (trace below). As the
> trace shows, the error is thrown when dl/import.rb tries to load the
> local HTMLTidy library (/usr/lib/libtidy.dylib).
>
> My gut instinct here is that this a limitation of RubyCocoa -- I can't
> use dynamic loading. Is that the case? If so, is there a way to work
> around it? I've looked at the Tidy gem project documentation and the
> RubyCocoa documentation, and I don't see anything related to this.
>
> Thanks in advance for any and all advice,
>
> Avram Lyon
>
> Trace from XCode Debugger console follows:
> ==snip==
> /Development/Mac_Plans/build/Release/Mac_Plans.app/Contents/Resources/rb_main.rb:23
> /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/dl/import.rb:126:in
> `symbol': can't find the symbol `tidyCreate' (RuntimeError)
>         from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/dl/import.rb:145:in
> `import'
>         from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/dl/import.rb:61:in
> `extern'
>         from /Library/Ruby/Gems/1.8/gems/tidy-1.1.2/lib/tidy/tidylib.rb:17:in `load'
>         from /Library/Ruby/Gems/1.8/gems/tidy-1.1.2/lib/tidy.rb:46:in `path='
>         from /Development/Mac_Plans/build/Release/Mac_Plans.app/Contents/Resources/plans_client.rb:195:in
> `tidy_up_html'
>         from /Development/Mac_Plans/build/Release/Mac_Plans.app/Contents/Resources/plans_client.rb:123:in
> `parse_v2'
>         from /Development/Mac_Plans/build/Release/Mac_Plans.app/Contents/Resources/plans_client.rb:114:in
> `parse'
>         from /Development/Mac_Plans/build/Release/Mac_Plans.app/Contents/Resources/plans_client.rb:72:in
> `login'
>         from /Development/Mac_Plans/build/Release/Mac_Plans.app/Contents/Resources/plans_window_controller.rb:25:in
> `loginClient'
>         from /Development/Mac_Plans/build/Release/Mac_Plans.app/Contents/Resources/rb_main.rb:23:in
> `NSApplicationMain'
>         from /Development/Mac_Plans/build/Release/Mac_Plans.app/Contents/Resources/rb_main.rb:23
>
> The Debugger has exited with status 1.The Debugger has exited with status 1.
> ==end of trace==
>