CGI::Validate

So we can

• require a parameter be mandatory
• specify a parameter to be optional, with a default value
• do constraint checking; builtins, array (for multi-selects)
• do extended constraint checking; regexs, sub (AddExtensions)

and returns

• CGI object, to extract valid parameters later
• sets arrays for error handling
  • %Missing
  • %Invalid
  • %InvalidType
  • %Blank

Again a lot of work for little return. Still have to extract the values for each parameter from CGI, even if they have been validated.