Posted by James on 05/02/05 23:52

Thank you guys for the answers. I think I will go with the following approach.

(A) script 1 submits to script 2 then
(B) script 2 redirects browser back to script 1

Script 1 is in charge of submitting and displaying; script 2 does the
processing.

This list is the best!
-James


At 2:08 AM +0000 4/27/05, Matthew Weier O'Phinney wrote:
>* James <jtu@esidesign.com>:
>> I apologize in advance if I'm asking basic questions...
>>
>> When you hit the back button, won't the browser just take the page
>> from the cache?
>>
>> I haven't switched my POSTs to GETs and this is what I'm seeing.
>> I have a list of images. There are check boxes next to the images.
>> When the user checks images and clicks on a DELETE CHECKED link, a
>> new list is shown (minus the ones deleted.) When the user hits the
>> BACK button, I see the list again with checks next to the previous
>> images marked for deletion
>
>By the way... the rule of thumb I think about is this:
>* Use GET requests when you want to be able to bookmark the page --
> i.e., when you want the behaviour repeatable. Typical example is
> searches.
>
>* Use POST requests when the operation will affect the data in some way
> that shouldn't be cached. Examples: submitting data that will be
> stored in the database, will update a database, or will delete an
> entry in the database.
>
>Because of the back button issues (namely, not all browsers treat 'back'
>the same way), you will need to do some workarounds, typically with
>sessions; I've mentioned these under separate cover.
>
>> Just in case...
>> I tried to add the following header before any html output to force
>> the browser to not load from the cache and it didn't work.
>>
>> header("Cache-Control: no-store, no-cache, must-revalidate");
>
>Not all browsers will actually follow these 'rules' (actually, they're
>in the HTTP specification, but 'rule' just sounds better). Heck,
>versions of the same browser on different platforms sometimes treat them
>differently.
>
>This is why session handling techniques are a common 'fix' for bad
>browser behaviour in these instances.
>
>--
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--
-James

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