From: Rob Biedenharn <Rob@...>
Date: 2009-09-28T13:11:20+09:00
Subject: Re: Getting a valid URL from a command line

On Sep 27, 2009, at 11:48 PM, Hunt Jon wrote:

> Hi - I'm working on the script below, which attempts at getting
> a user input and validate that the input is formed like a URL.
> And if the user fails to input, it should ask again.
>
> require 'uri'
> puts "Type a URL"
> begin
>  url = gets.chomp
>  URI.parse(url) # should raise if a variable 'url' is malformed.
> rescue URI::InvalidURIError
>  puts "That is not a valid URL. Try again."
>  retry
> end
>
> I expect that if I run "URI.parse()" it should raise an error, but
> it doesn't happen.
>
> Can anybody help me on this one?
>
> Jon

require 'uri'
print "Type a URL: "
begin
   url = gets.chomp
   puts "You said: #{url.inspect}"
   uri = URI.parse(url) # should raise if a variable 'url' is malformed.
   puts uri.inspect
rescue URI::InvalidURIError
   puts "That is not a valid URL. Try again."
   retry
end

Try getting a little bit more information out (and post what input you  
are trying that you expect to be malformed).

Note that some URI's are HTTP and some might be Generic.  There are a  
lot more types of URI that just those that start with http://.  Have  
you ever seen a jdbc resource string?

-Rob

Rob Biedenharn		http://agileconsultingllc.com
Rob@AgileConsultingLLC.com