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comp.lang.ruby

Nokogiri not getting html body sometimes

Jarmo Pertman

5/20/2009 5:45:00 PM

I'm using Mechanize to get imdb page and then Nokogiri Node#search
method to get some info from the page, but I've stumbled onto one
special case where #search doesn't work properly, e.g. all other pages
I've tried so far work as expected.

It seems that some special characters are causing the trouble for
Nokogiri, because when I tried to print document itself it outputted
only half of <head> tag and no body tags at all!

Anyway here is the code snippet which I'd expect to output "false" 4
times. Instead, it outputs false, false, true, false. Try with some
other imdb url and it's ok.

require 'mechanize'

mech = WWW::Mechanize.new {|agent| agent.user_agent_alias = 'Windows
Mozilla'}
mech.get("http://www.imdb.com/title/tt1092...) do |page|
puts page.search("/html").empty?
puts page.search("/html/head").empty?
puts page.search("/html/body").empty?
puts page.body.empty?
end

What could be the problem?

I'm using ruby 1.8.6 (2007-09-24 patchlevel 111) [i386-mswin32]
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2 Answers

Lui Core

5/21/2009 2:29:00 PM

0

i think you'd better set the encoding first.

mech.get("http://www.imdb.com/title/tt1092...) do |page|
page.encoding = 'ISO-8859-1'
#... the rest of ur code
end
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Jarmo Pertman

5/21/2009 4:32:00 PM

0

Thank you! It did the trick.

Best regards,
Jarmo

Lui Core wrote:
> i think you'd better set the encoding first.
>
> mech.get("http://www.imdb.com/title/tt1092...) do |page|
> page.encoding = 'ISO-8859-1'
> #... the rest of ur code
> end


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