preventing multiple users from using app concurrently

[sktodd2]

I have an application that opens a new window using an IP address as the link for viewing a camera. The window closes after a timeout of 15 minutes. How do I prevent a second user from accessing the camera while user one is still viewing the camera image?

 

[vacunita]

Not with Javascript as there's no way for Js to know if the camera has been accessed on the server.

You'd need to set a flag in your server programming that your camera code can read. If its on then the user cannot access the camera.




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Phil AKA Vacunita
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Ignorance is not necessarily Bliss, case in point:
Unknown has caused an Unknown Error on Unknown and must be shutdown to prevent damage to Unknown.

Behind the Web, Tips and Tricks for Web Development.

http://behindtheweb.blogspot.com/

 

[sktodd2]

Please give me an example of what you mean by "set a flag in your server programming that your camera code can read". Unfortunately I am a newbie to Javascript programming. Thanks.

 

[vacunita]

I can't give you an example, because I don't know how your camera works off the server.

I doubt JS has anything to do with its control or access other than providing a form.

You should know how your page is accessing the camera, and how your server is providing such access, from that you should be able to determine how to set a usage flag that can be set or read each time the camera is accessed.

But I can't get any more specific than that as I have no idea what internal workings are making the camera access possible.



----------------------------------
Phil AKA Vacunita
----------------------------------
Ignorance is not necessarily Bliss, case in point:
Unknown has caused an Unknown Error on Unknown and must be shutdown to prevent damage to Unknown.

Behind the Web, Tips and Tricks for Web Development.

http://behindtheweb.blogspot.com/