Hello all,
I recently was pointed towards the Nokogiri gem recently to find all html elements with a particular class, rather than attempting my own regular expression. (Thanks John-John Tedro and Hassan Schroeder!!!!)
It works perfectly on my local machine, (Lion OS X and passenger), but when I deployed it to my server (Centos 5.5 and passenger) Nokogiri seems to not grab all the elements of the html file.
Here is my method:
I'll guess your server has an older (buggier) libxml2 than your Mac -- you can check versions using `xmllint --version`.
If it's older, try upgrading and see if that fixes it.
I did $ yum list updates and the only one that said there was an update that was close to libxml2 was 'libxml2-python'.
I updated that and it still does not work. When I checked the version, the output was this:
I did $ yum list updates and the only one that said there was an update that was close to libxml2 was 'libxml2-python'.
I don't think that's relevant 
I updated that and it still does not work. When I checked the version, the output was this:
xmllint --version xmllint: using libxml version 20626
On my Mac (Snow Leopard) version 20708 On a very old SuSE box (home office spare) version 20620 On an Ubuntu server provisioned in the last year version 20626
So I would bet that difference could still account for your problem.
I rarely use package managers like yum; usually it seems faster and
easier to just install/update from source
You might want to research the change history but I would probably just update and see what happens...
FWIW,
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It says this at the bottom of each message...
Keith Raymond wrote in post #1018677:
# I tried using xpath, but was not able to get it to grab elements w/ 'class="my-class icon"' # only 'class="my-class"'
If you give up on installing a newer version of libxml (I've tried it in the past and found it impossible), you can use xpath() to do what you want:
<!DOCTYPE html> <html> <head> <title>Test</title> </head>
<body> <h1 class='editor highlight'>Hello world</h1>
<div class="editor_fruit red">Apple</div>
<div class="article_editor"> <div>Not this node</div> <div class="hide editor">Papillon</div> </div>
</body>
</html>
require 'nokogiri'
f = File.open('2html.htm') doc = Nokogiri::HTML(f)
results = doc.xpath("//*[contains(concat(' ', @class, ' '), ' editor ')]").each do |el| p [ el.attributes['class'].value, el.children[0].text ] end
--output:-- ["editor highlight", "Hello world"] ["hide editor", "Papillon"]
Just an update...
I removed older versions of libxml2 and libxslt and reinstalled them from the source and it appears to be working.
Thank you for all your help, again