From: Bill Kelly <billk@...>
Date: 2002-10-31T05:51:30+09:00
Subject: Re: get index.htm and read it out

Hi,

From: "Tom Stone" <miner@arcor.de>
> Hi,
> I found this code the pragmatic programmers book.
> require 'net/http'
> 
> h = Net::HTTP.new('www.pragmaticprogrammer.com', 80)
> resp, data = h.get('http://www.pragmaticprogrammer.com/index.html', nil)
> if resp.message == "OK"
>   data.scan(/<img src="(.*?)"/) { |x| puts x }
> end
> 
> So I copied this code and tried to execute it with the ruby interpreter. But
> it didn't work. It just displays an errror message "private method scan
> called for nil". Does anyone have a suggestion why this does not work?
> Thanks

Pasting lines from your email above into irb worked OK for me
here (ruby 1.6.6 (2001-12-26) [i586-mswin32]).

irb> require 'net/http'
true
irb> h = Net::HTTP.new('www.pragmaticprogrammer.com', 80)
#<Net::HTTP www.pragmaticprogrammer.com:80 open=false>
irb> resp, data = h.get('http://www.pragmaticprogrammer.com/index.html', nil)
[#<Net::NetPrivate::HTTPResponse 200>, "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD
HTML 4.0 Transitional//EN\">  [......long string elided.....]
irb> resp.message == "OK"
true
irb> data.scan(/<img src="(.*?)"/) { |x| puts x }
images/title_main.gif
images/dot.gif
images/dot.gif
images/dot.gif
images/aafounders_70.jpg
images/pp_cover_thumb.png
images/ruby_cover_thumb.png
images/dot.gif
images/dot.gif


Perhaps if you try it in IRB it'll be more clear which part
of the code is failing on your system?

HTH,

Bill