From: Ken Brush <kbrush@...>
Date: 2005-08-16T01:25:47+09:00
Subject: Bug in cgi/session

Hi All,

I couldn't find a bug tracker for ruby, to see if this was known or
not. Anyhow, there is a problem with cgi/session.  It'll convert a
value of a hash stored in the session to an array, I think on close.

Here's the test case I'm using:

--- Start ruby code ---
#!/usr/bin/ruby

# Test case for cgi session
require 'cgi'
require 'cgi/session'



cgi = CGI.new("html4")
begin
    session = CGI::Session.new(cgi, 'new_session' => false)
    rescue ArgumentError  
    session = CGI::Session.new(cgi, 'new_session' => true)
end

session['cart'] ||= Hash.new(0);
session['cart'][cgi.params["id"]] += 1
out = "#{cgi.params["id"]} -- #{session['cart'][cgi.params["id"]]}"

print cgi.header
print cgi.out() { out }
session.close
-- End of ruby code ---

When accessed with something like: 
http://localhost/~kbrush/add.rb?id=foo

it'll print 'foo -- 1'
then access it again and you'll get an 'Internal Error'

This is the error in error.log:

[Mon Aug 15 09:25:27 2005] [error] mod_ruby: error in ruby
[Mon Aug 15 09:25:27 2005] [error] mod_ruby:
/home/kbrush/public_html/add.rb:19:in `[]': cannot convert Array into
Integer (TypeError)
[Mon Aug 15 09:25:27 2005] [error] mod_ruby:   from
/home/kbrush/public_html/add.rb:19
[Mon Aug 15 09:25:27 2005] [error] mod_ruby:   from
/usr/lib/ruby/1.8/apache/ruby-run.rb:53:in `load'
[Mon Aug 15 09:25:27 2005] [error] mod_ruby:   from
/usr/lib/ruby/1.8/apache/ruby-run.rb:53:in `handler'
[Mon Aug 15 09:25:28 2005] [error] [client 127.0.0.1] File does not
exist: /var/www/favicon.ico


you get the same error if you use mod_ruby or not.

-Ken