How create a server switch

[evvivame]

Hello,
i have a very easy html page with 2 distinct sections.
The first internet user (that load this page) must be execute both sections,the subsequent internet users must be execute ONLY the section 2.

How (i think) create a server switch for check if i'm the first internet user or subsequent?

Thanks !!!
Luciana

[Frinavale]

Set a cookie in the browser that never expires.
Check that cookie to determine what to display.
You probably need to use JavaScript to hide/display the appropriate sections according to whether or not the cookie is set.

-Frinny

[Nepomuk]

Hi evvivame and welcome to bytes.com!

A typical web site will do nothing of the kind; every session started is supposed to be independent of the others. That said, there are of course tricks to do stuff like this but they will require server side programming.
One possible solution would be for the server to check whether a file with a certain name is present on the computer it's running on; if not it creates it. So, the first user will start a session without the file present and the second will start one with it present. This file could of course contain information (e.g. an IP address).

@Frinny: Uhm, I think one of us misunderstood the question. ^^

[Frinavale]

Yup the question is ambiguous.

I see where you are coming from but my answer could still be valid...

We will have to wait for clarification :)

[evvivame]

Hi,
sorry if i was ambigous!!

I think EVERY internet user (that open my html page) work on DIFFERENT stations: this mean i can't use the cookie.
Example:
a) Frinavale open my web page and execute section 1&2
b) While Frinavale is on my page,Nepomuk open the same page and execute ONLY the sction 2

For more know:
section 1 start camera's patrol
section 2 display the camera
If all internet users start the section1, the camera crazy :))

Now i hope a bit clear

p.s. With my bad english i think Nepomuk on the right way....but isn't clear how improvement :(

Thanks very much for the support !

[Frinavale]

Yeah that solution requires some server-side coding.

A while ago (years ago maybe??) I created a server-side application that connected DVR and every time it got an image from the DVR it pushed the image down to any connected clients.

There was only 1 connection to the DVR: my server component. This server component listened for connecting clients (web browsers hosting a SilverLight app) and every time it got a new image it would push the image down to each connected client.

I remember being excited about HTML5 at the time and it's promise of sockets but this feature wasn't implemented in any browsers at the time and my excitement wore off as I got involved in other projects.

Anyways, my point being that I had to create a server side application that connected to the "camera" so that not all the browsers were connecting to it directly (causing problems).

-Frinny

[evvivame]

Finavale,
sorry for my stupid question:

A html page can create a file (as switch) on the webserver?

If yes can be easy check if this switch is on (execute ONLY section 2) or off ( set switch to on and execute Section 1 & 2) ?

Regards

[Dormilich]

A html page can create a file (as switch) on the webserver?

no. a HTML page is not a programme, it’s just markup. and it’s only working on the client.

[Frinavale]

As Dorm has stated, HTML is just a markup language that is used to describe how to render content in a browser.

This content can be dynamically generated by an application or script that is run on a web server. This server component can be coded using any web language (like php, asp, asp.net, java, perl etc. etc.)

This server component would load the camera and return the appropriate HTML content according to whether or not the camera is loaded.

-Frinny