Why Page Expires?

[Guest]

When I complete a <FORM METHOD=POST> and I press <INPUT TYPE=SUBMIT> a new
page was arrive.

Then, if I press browser back button it says that: "page has expired".

Why???
Can I fix it or it is client side?

I use <input tupe=submit> instead of links because it goes with my page
style.
I dont use <input type=button> because it requires javascript and it does
not work with browsers that not support javascript.

Thanks

[Andy Hassall]

Re: Why Page Expires?

On Sun, 21 Dec 2003 20:26:14 +0200, "<- Chameleon ->"
<cham_gss@hotma il.NOSPAM.com> wrote:
[color=blue]
>When I complete a <FORM METHOD=POST> and I press <INPUT TYPE=SUBMIT> a new
>page was arrive.
>
>Then, if I press browser back button it says that: "page has expired".
>
>Why???
>Can I fix it or it is client side?[/color]

It's supposed to. POST is for when posting a form has a side-effect, so you
want to prevent doing it twice.

If you want to be able to go back, because posting the form again would not
cause a problem, use <form method="get" ...>

--
Andy Hassall (andy@andyh.co. uk) icq(5747695) (http://www.andyh.co.uk)
Space: disk usage analysis tool (http://www.andyhsoftware.co.uk/space)

[Guest]

Re: Why Page Expires?

> >When I complete a <FORM METHOD=POST> and I press <INPUT TYPE=SUBMIT> a
new[color=blue][color=green]
> >page was arrive.
> >
> >Then, if I press browser back button it says that: "page has expired".
> >
> >Why???
> >Can I fix it or it is client side?[/color]
>
> It's supposed to. POST is for when posting a form has a side-effect, so[/color]
you[color=blue]
> want to prevent doing it twice.
>
> If you want to be able to go back, because posting the form again would[/color]
not[color=blue]
> cause a problem, use <form method="get" ...>[/color]

it work now! thanks!

[Geoff Muldoon]

Re: Why Page Expires?

cham_gss@hotmai l.NOSPAM.com says...[color=blue]
> When I complete a <FORM METHOD=POST> and I press <INPUT TYPE=SUBMIT> a new
> page was arrive.
>
> Then, if I press browser back button it says that: "page has expired".
>
> Why???
> Can I fix it or it is client side?[/color]

Think. "expired" - when? from where?
Clue #1: the BROWSER back button.
Clue #2: client-side browser caching.
[color=blue]
> I use <input tupe=submit> instead of links because it goes with my page
> style.
> I dont use <input type=button> because it requires javascript and it does
> not work with browsers that not support javascript.[/color]

Wrong, <input type=button> requires ZERO javascript. Unfortunately,
many developers use javascript with it to change button images on
rollover, but that isn't mandatory.

Clue #3: This is a PHP group, next time try:
comp.infosystem s.www.authoring.html

GM

[Geoff Muldoon]

Re: Why Page Expires?

andy@andyh.co.u k says...[color=blue]
> On Sun, 21 Dec 2003 20:26:14 +0200, "<- Chameleon ->"
> <cham_gss@hotma il.NOSPAM.com> wrote:
>[color=green]
> >When I complete a <FORM METHOD=POST> and I press <INPUT TYPE=SUBMIT> a new
> >page was arrive.
> >
> >Then, if I press browser back button it says that: "page has expired".[/color]
>
> It's supposed to. POST is for when posting a form has a side-effect, so you
> want to prevent doing it twice.[/color]

Um, wouldn't that be by hitting the reload/refresh button? Hitting the
back button should just re-display the form prior to the submit.

Geoff M

[Andy Hassall]

Re: Why Page Expires?

On Mon, 22 Dec 2003 14:51:29 +1100, Geoff Muldoon
<gmuldoon_remov e_this_bit_@scu .edu.au> wrote:
[color=blue]
>andy@andyh.co. uk says...[color=green]
>> On Sun, 21 Dec 2003 20:26:14 +0200, "<- Chameleon ->"
>> <cham_gss@hotma il.NOSPAM.com> wrote:
>>[color=darkred]
>>>When I complete a <FORM METHOD=POST> and I press <INPUT TYPE=SUBMIT> a new
>>>page was arrive.
>>>
>>>Then, if I press browser back button it says that: "page has expired".[/color]
>>
>> It's supposed to. POST is for when posting a form has a side-effect, so you
>> want to prevent doing it twice.[/color]
>
>Um, wouldn't that be by hitting the reload/refresh button? Hitting the
>back button should just re-display the form prior to the submit.[/color]

Hm, that's true - unless some cache control headers were sent?

--
Andy Hassall (andy@andyh.co. uk) icq(5747695) (http://www.andyh.co.uk)
Space: disk usage analysis tool (http://www.andyhsoftware.co.uk/space)

[Rob Gudgeon]

Re: Why Page Expires?


"Andy Hassall" <andy@andyh.co. uk> wrote in message
news:6ilduv8rtv p9u5dm63ifgakdi bemmbdk8a@4ax.c om...[color=blue]
> On Mon, 22 Dec 2003 14:51:29 +1100, Geoff Muldoon
> <gmuldoon_remov e_this_bit_@scu .edu.au> wrote:
>[color=green]
> >andy@andyh.co. uk says...[color=darkred]
> >> On Sun, 21 Dec 2003 20:26:14 +0200, "<- Chameleon ->"
> >> <cham_gss@hotma il.NOSPAM.com> wrote:
> >>
> >>>When I complete a <FORM METHOD=POST> and I press <INPUT TYPE=SUBMIT> a[/color][/color][/color]
new[color=blue][color=green][color=darkred]
> >>>page was arrive.
> >>>
> >>>Then, if I press browser back button it says that: "page has expired".
> >>
> >> It's supposed to. POST is for when posting a form has a side-effect,[/color][/color][/color]
so you[color=blue][color=green][color=darkred]
> >> want to prevent doing it twice.[/color]
> >
> >Um, wouldn't that be by hitting the reload/refresh button? Hitting the
> >back button should just re-display the form prior to the submit.[/color]
>
> Hm, that's true - unless some cache control headers were sent?
>
> --
> Andy Hassall (andy@andyh.co. uk) icq(5747695) (http://www.andyh.co.uk)
> Space: disk usage analysis tool (http://www.andyhsoftware.co.uk/space)[/color]


[color=blue][color=green]
> >Hitting the back button should just re-display the form prior to the[/color][/color]
submit.

Not in the page with the form on it was itself generated from a POSTed form?

Rob

[Andy Hassall]

Re: Why Page Expires?

On Mon, 22 Dec 2003 13:25:24 +0000 (UTC), "Rob Gudgeon"
<robin.gudgeon@ SPAMTRAP.bt.com > wrote:
[color=blue][color=green][color=darkred]
>>>>> When I complete a <FORM METHOD=POST> and I press <INPUT TYPE=SUBMIT> a
>>>>> new page was arrive.
>>>>>
>>>>> Then, if I press browser back button it says that: "page has expired".
>>>>
>>>> It's supposed to. POST is for when posting a form has a side-effect,
>>>> so you want to prevent doing it twice.
>>>
>>> Um, wouldn't that be by hitting the reload/refresh button? Hitting the
>>> back button should just re-display the form prior to the submit.[/color]
>>
>> Hm, that's true - unless some cache control headers were sent?[/color]
>
>Not in the page with the form on it was itself generated from a POSTed form?[/color]

Ah, that's it - need at least two POSTs in the chain for IE to kick in with
the message:

"Warning: Page has Expired The page you requested was created using information
you submitted in a form. This page is no longer available. As a security
precaution, Internet Explorer does not automatically resubmit your information
for you.

To resubmit your information and view this Web page, click the Refresh button."

Mozilla pops up a warning to the same effect in a messagebox in the same
situation.

--
Andy Hassall (andy@andyh.co. uk) icq(5747695) (http://www.andyh.co.uk)
Space: disk usage analysis tool (http://www.andyhsoftware.co.uk/space)

[FLEB]

Re: Why Page Expires?

Regarding this well-known quote, often attributed to Geoff Muldoon's famous
"Mon, 22 Dec 2003 13:50:33 +1100" speech:
[color=blue][color=green]
>> (Snip the actual question, and get on to picky points)[/color][/color]
[color=blue]
> Wrong, <input type=button> requires ZERO javascript. Unfortunately,
> many developers use javascript with it to change button images on
> rollover, but that isn't mandatory.
>[/color]

I'll see your "Wrong" and raise you one. You need JavaScript to do
/anything/ useful with a FORM BUTTON element. SUBMITS, RESETs, and FORM
IMAGEs work on their own, but a FORM BUTTON without any JavaScript just
sits there and looks clicky.

--
-- Rudy Fleminger
-- sp@mmers.and.ev il.ones.will.bo w-down-to.us
(put "Hey!" in the Subject line for priority processing!)
-- http://www.pixelsaredead.com

[Geoff Muldoon]

Re: Why Page Expires?

In article <jooap8qegp9n.1 860veqfs2svv.dl g@40tude.net>,
soon.the.sp@mme rs.and.evil.one s.will.bow-down-to.us says...[color=blue]
> Regarding this well-known quote, often attributed to Geoff Muldoon's famous
> "Mon, 22 Dec 2003 13:50:33 +1100" speech:
>[color=green][color=darkred]
> >> (Snip the actual question, and get on to picky points)[/color][/color]
>[color=green]
> > Wrong, <input type=button> requires ZERO javascript. Unfortunately,
> > many developers use javascript with it to change button images on
> > rollover, but that isn't mandatory.
> >[/color]
>
> I'll see your "Wrong" and raise you one. You need JavaScript to do
> /anything/ useful with a FORM BUTTON element. SUBMITS, RESETs, and FORM
> IMAGEs work on their own, but a FORM BUTTON without any JavaScript just
> sits there and looks clicky.[/color]

Yep, my bad. Was thinking <input type=image>.

GM