[cgiapp] Re: passing in a param from another runmode

[Robert Hicks]

Mark Stosberg wrote:
>>> I have a runmode that goes back to "home" when finished:
>>>
>>>  $self->home;
>>>
>>>  I would like to send a flag back to "home" (0 for bad and 1 for good) so  a
>>> param in home can be set.
>> >From the runmode (method) you want to return back to home from, just
>> return the output of the home method, like "return
>> $self->home($err_code);" (assuming the home method does a
>> $tmpl_obj->output().).
>>
>> The next problem is if you want the URL of the resulting page to look
>> like the user is on the home page (in case they bookmark it). If so,
>> you have to set the header_type to redirect (from the runmode (method)
>> you want to return to home) to cause the home runmode to be invoked.
>> If you want to pass a value, it would have to be on the URL as a
>> parameter, or kept as part of the session information for that
>> visitor, or stuffed in a cookie.
> 
> After trying different variations, I agree with Mark Fuller here, that passing values
> through the URL or session is the best way to go.  Benefits include:
> 
> - The result is bookmarkable.
> - The target page is easier to test, because  you can go directly to that state with a GET,
>   rather than first going through the other page.
> 
> I do recommend only passing boolean flags to note that you've changed state:
> 
>  index?update_success_p=1
> 
> This keeps you in total control of the resulting output, while passing anything that then
> gets displayed back as HTML is opening you up for an XSS attack.
> 
>     Mark
> 
That is what I did.  :-)

Robert