Detecting if onUnload() was called because of a refresh...

[Dag Sunde]

Is there a way to detect if the reason an onUnload()
handler was called originated from the user explicitly
refreshed the page(s)?

Ie. pressed "Ctrl-R", "F5" or klicked the refresh button
in the toolbar or the context menu?

I'm aware that I can not stop a refresh, but the reason
I want to know is that I have a hidden frame in an intranet
application. This hidden frame is present at all times after
the user have sucessfully logged in (to our db).

So the only time this frame is closed is when the user
navigates away from the intranet app. At which point I want
to log him/her out.

I do thid With an AJAX call in the unload-event of the hidden
frame.

*BUT*... This leads to logging out if the user presses "F5",
or in other ways refresh the window, since a refresh reloads
both frames.

So I thought that if I could detect that this was a refresh in
progress, I can avoid logging him/her out.

PS!
I only need this to work in an IE-only scenario.

TIA...

 

[Randy Webb]

Dag Sunde said the following on 9/2/2005 7:09 AM:

Is there a way to detect if the reason an onUnload()
handler was called originated from the user explicitly
refreshed the page(s)?
No.

Ie. pressed "Ctrl-R", "F5" or klicked the refresh button
in the toolbar or the context menu?
No.

I'm aware that I can not stop a refresh, but the reason
I want to know is that I have a hidden frame in an intranet
application. This hidden frame is present at all times after
the user have sucessfully logged in (to our db).

Not possible to know how it was loaded, only that it was loaded.

So the only time this frame is closed is when the user
navigates away from the intranet app. At which point I want
to log him/her out.

Use a session variable on the server. Never rely on the client.

I do thid With an AJAX call in the unload-event of the hidden
frame.

*BUT*... This leads to logging out if the user presses "F5",
or in other ways refresh the window, since a refresh reloads
both frames.

IFrame gets unloaded, user gets logged out.
IFrame gets reloaded, user gets logged back in.

Have the IFrame check, onload, to see if the user is logged in. If not,
refer them back to the login page. It won't take many refresh/relogins
for them to stop using the Refresh.

So I thought that if I could detect that this was a refresh in
progress, I can avoid logging him/her out.

Can't distinguish.

PS!
I only need this to work in an IE-only scenario.

Doesn't matter.

 

[Dag Sunde]

Dag Sunde said the following on 9/2/2005 7:09 AM:


No.

<snipped />

Now, that was encouraging... ;-)

Ok... I drop that path then, and consentrate on the serverside.

Thanks for saving me a dead-end journey.

 

[Randy Webb]

Dag Sunde said the following on 9/2/2005 6:54 PM:

<snipped />

Now, that was encouraging... ;-)

Glad I could be of help

Ok... I drop that path then, and consentrate on the serverside.

That's the best place to handle it.

Thanks for saving me a dead-end journey.

Welcome.