web.rb

#!/usr/local/bin/ruby
# web.rb
# to be run with apache, as long as apache is setup to parse .rb and can execute the file
puts "Content-Type: text/html" # has to happen before output to browser
puts
begin # wrap page in exception to avoid 500 errors

param = ARGV[0]
if ARGV[0]
puts <<-end
  <h1>your param is #{param}</h1>
  <pre>
   groovy!
   the
   script
   worked
  </pre>
end
else
  puts "you should put a param on this url: http://yourserver/web.rb?YOURPARAM"
end

bogusFunction # this is a bogus function to test errors

rescue Exception # output errors to browser
  puts "<div style='border: 1px dashed #000; background-color: #fcc; padding: 10px; margin: 10px'>"
  puts "<em>#{$!.backtrace}</em>: <strong>#{$!.message}</strong>"
  puts "</div>"
end # end exception wrap