Web login problem - Visual Basic .NET

guy

I am not a web developer so this is probably easy!
in a web app i have a login page
if a user logs in, does stuff, logs out - which takes them back to the login
page - how do i stop a new user hitting 'back' from the login page and seeing
the last page the previous user was looking at (this could be any page in the
application)?

Sep 12 '06 #1

Subscribe Post Reply

1385

Timo

When a user logs in to your web app, it sets a cookie to know
who's logged in. When user logs out the cookie is disposed.
One more thing to do is not to store pages in browser cache.

If your web app is written is ASP, you can set the precise date
and time when a cached page expires:
Response.ExpiresAbsolute = Now() - 1

Or specify the time in minutes before a cached page expires:
Response.Expires = 0
Setting this value to zero reloads page every time.

In plain HTML tell the browser not to cache page and immediately
expire page:
<HTML>
<HEAD>
<TITLE>---</TITLE>
<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Expires" CONTENT="-1">
</HEAD>

Similar techniques can be used in ASP.NET and PHP.

- Timo
"guy" <gu*@discussions.microsoft.comwrote in message
news:DD**********************************@microsof t.com...

>I am not a web developer so this is probably easy!
in a web app i have a login page
if a user logs in, does stuff, logs out - which takes them back to the
login
page - how do i stop a new user hitting 'back' from the login page and
seeing
the last page the previous user was looking at (this could be any page in
the
application)?

Sep 12 '06 #2

guy

Thanks Timo, the problem is that most of the time i do not want the page to
be reloaded each time, i want back and forward functionality to work.

if loged out the application will force a log in when the operator tries to
do anything within the application (this works), but when in the login page
ONLY i do not want them to be able to go 'back' and see the previous page.

Correct me if i am wrong but setting Response.Expires would have to be done
in every page, and this would not be waht i want

thanks

guy
"Timo" wrote:

When a user logs in to your web app, it sets a cookie to know
who's logged in. When user logs out the cookie is disposed.
One more thing to do is not to store pages in browser cache.

If your web app is written is ASP, you can set the precise date
and time when a cached page expires:
Response.ExpiresAbsolute = Now() - 1

Or specify the time in minutes before a cached page expires:
Response.Expires = 0
Setting this value to zero reloads page every time.

In plain HTML tell the browser not to cache page and immediately
expire page:
<HTML>
<HEAD>
<TITLE>---</TITLE>
<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Expires" CONTENT="-1">
</HEAD>

Similar techniques can be used in ASP.NET and PHP.

- Timo
"guy" <gu*@discussions.microsoft.comwrote in message
news:DD**********************************@microsof t.com...
I am not a web developer so this is probably easy!
in a web app i have a login page
if a user logs in, does stuff, logs out - which takes them back to the
login
page - how do i stop a new user hitting 'back' from the login page and
seeing
the last page the previous user was looking at (this could be any page in
the
application)?

Sep 12 '06 #3

guy

Solved ...
When the user hits the logout button - go to a page that redirects them to
the Login page, this means that if they hit Back from the Login page they go
to athe page that redirects them back to the Login

"guy" wrote:

Thanks Timo, the problem is that most of the time i do not want the page to
be reloaded each time, i want back and forward functionality to work.

if loged out the application will force a log in when the operator tries to
do anything within the application (this works), but when in the login page
ONLY i do not want them to be able to go 'back' and see the previous page.

Correct me if i am wrong but setting Response.Expires would have to be done
in every page, and this would not be waht i want

thanks

guy
"Timo" wrote:

When a user logs in to your web app, it sets a cookie to know
who's logged in. When user logs out the cookie is disposed.
One more thing to do is not to store pages in browser cache.

If your web app is written is ASP, you can set the precise date
and time when a cached page expires:
Response.ExpiresAbsolute = Now() - 1

Or specify the time in minutes before a cached page expires:
Response.Expires = 0
Setting this value to zero reloads page every time.

In plain HTML tell the browser not to cache page and immediately
expire page:
<HTML>
<HEAD>
<TITLE>---</TITLE>
<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Expires" CONTENT="-1">
</HEAD>

Similar techniques can be used in ASP.NET and PHP.

- Timo
"guy" <gu*@discussions.microsoft.comwrote in message
news:DD**********************************@microsof t.com...
>I am not a web developer so this is probably easy!
in a web app i have a login page
if a user logs in, does stuff, logs out - which takes them back to the
login
page - how do i stop a new user hitting 'back' from the login page and
seeing
the last page the previous user was looking at (this could be any page in
the
application)?
>

Sep 12 '06 #4

GhostInAK

Hello guy,
HAHA. I absolutely HATE companies that do that. Your so-caled colution
will work only if the user isnt some twitchy 14 yr old that can hit the button
faster than the redirect can happen.. or if the user is too stoopid to notice
the drop down arrow next to the back button.

-Boo

Solved ...
When the user hits the logout button - go to a page that redirects
them to
the Login page, this means that if they hit Back from the Login page
they go
to athe page that redirects them back to the Login
"guy" wrote:

>Thanks Timo, the problem is that most of the time i do not want the
page to be reloaded each time, i want back and forward functionality
to work.

if loged out the application will force a log in when the operator
tries to do anything within the application (this works), but when in
the login page ONLY i do not want them to be able to go 'back' and
see the previous page.

Correct me if i am wrong but setting Response.Expires would have to
be done in every page, and this would not be waht i want

thanks

guy
"Timo" wrote:
>>When a user logs in to your web app, it sets a cookie to know who's
logged in. When user logs out the cookie is disposed. One more thing
to do is not to store pages in browser cache.

If your web app is written is ASP, you can set the precise date
and time when a cached page expires:
Response.ExpiresAbsolute = Now() - 1
Or specify the time in minutes before a cached page expires:
Response.Expires = 0
Setting this value to zero reloads page every time.
In plain HTML tell the browser not to cache page and immediately
expire page:
<HTML>
<HEAD>
<TITLE>---</TITLE>
<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Expires" CONTENT="-1">
</HEAD>
Similar techniques can be used in ASP.NET and PHP.

- Timo

"guy" <gu*@discussions.microsoft.comwrote in message
news:DD**********************************@micros oft.com...

I am not a web developer so this is probably easy!
in a web app i have a login page
if a user logs in, does stuff, logs out - which takes them back to
the
login
page - how do i stop a new user hitting 'back' from the login page
and
seeing
the last page the previous user was looking at (this could be any
page in
the
application)?

Sep 13 '06 #5

guy

"GhostInAK" wrote:

Hello guy,
HAHA. I absolutely HATE companies that do that. Your so-caled colution
will work only if the user isnt some twitchy 14 yr old that can hit the button
faster than the redirect can happen.. or if the user is too stoopid to notice
the drop down arrow next to the back button.

-Boo

Solved ...
When the user hits the logout button - go to a page that redirects
them to
the Login page, this means that if they hit Back from the Login page
they go
to athe page that redirects them back to the Login
"guy" wrote:

Thanks Timo, the problem is that most of the time i do not want the
page to be reloaded each time, i want back and forward functionality
to work.

if loged out the application will force a log in when the operator
tries to do anything within the application (this works), but when in
the login page ONLY i do not want them to be able to go 'back' and
see the previous page.

Correct me if i am wrong but setting Response.Expires would have to
be done in every page, and this would not be waht i want

thanks

guy
"Timo" wrote:
When a user logs in to your web app, it sets a cookie to know who's
logged in. When user logs out the cookie is disposed. One more thing
to do is not to store pages in browser cache.

If your web app is written is ASP, you can set the precise date
and time when a cached page expires:
Response.ExpiresAbsolute = Now() - 1
Or specify the time in minutes before a cached page expires:
Response.Expires = 0
Setting this value to zero reloads page every time.
In plain HTML tell the browser not to cache page and immediately
expire page:
<HTML>
<HEAD>
<TITLE>---</TITLE>
<META HTTP-EQUIV="Pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Expires" CONTENT="-1">
</HEAD>
Similar techniques can be used in ASP.NET and PHP.

- Timo

"guy" <gu*@discussions.microsoft.comwrote in message
news:DD**********************************@microso ft.com...

I am not a web developer so this is probably easy!
in a web app i have a login page
if a user logs in, does stuff, logs out - which takes them back to
the
login
page - how do i stop a new user hitting 'back' from the login page
and
seeing
the last page the previous user was looking at (this could be any
page in
the
application)?

and the answer is?

Sep 14 '06 #6

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