From: Jeroen van Ingen <lists@...>
Date: 2012-04-17T22:28:06+09:00
Subject: Re: Can't open url with a subdomain with an underscore

if I have the following url: http://auto_diversen.marktplaza.nl

This works fine:
URI::Parser.new(:HOSTNAME => "(?:[_a-zA-Z0-9\\-.]|%\\h\\h)+").parse(url)

But this returns an error:
URI::Parser.new(:HOSTNAME => 
"(?:[_a-zA-Z0-9\\-.]|%\\h\\h)+").parse(url).open
Returns: the scheme http does not accept registry part: 
auto_diversen.marktplaza.nl:80 (or bad hostname?)

When I look to the source of 'open', It looks to be that it parses the 
URL again, so the error is raised.
The source on: 
http://www.ruby-doc.org/stdlib-1.9.3/libdoc/open-uri/rdoc/Kernel.html#method-i-open
# File open-uri.rb, line 27
def open(name, *rest, &block) # :doc:
  if name.respond_to?(:open)
    name.open(*rest, &block)
  elsif name.respond_to?(:to_str) &&
        %{\A[A-Za-z][A-Za-z0-9+\-\.]*://} =~ name &&
        (uri = URI.parse(name)).respond_to?(:open)
    uri.open(*rest, &block)
  else
    open_uri_original_open(name, *rest, &block)
  end
end

Anyone got an idea how to open the uri?

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