Re: Rik--perhaps you know
- From: "Rik" <luiheidsgoeroe@xxxxxxxxxxx>
- Date: Sun, 16 Jul 2006 10:37:22 +0200
David wrote:
Scenario: I enter information in a form. I want a table on another
screen (terminal server?) to be updated with that information. Is it
possible to direct output directly to another screen?
What I have thought of so far is this:
I can run a broswer at another terminal (computer), log in to the
screen that needs to be updated and use the refresh meta command to
have the page update itself (I believe). Can a page refresh itself?
If yes, will the database queries be executed?
If you allow the browser to refresh pages it can, either by meta-tags, or
javascript. As long as the page isn't cached by the browser, and you run
queries on the remote PHP-script, they will offcourse run every time the
page is requested.
At the main program, the data would be entered using forms and stored
in a database for the "terminal" program to retrieve.
What I would really like to happen is that the main program "pushes"
the data to the terminal, though.
That's not possible in browsers.
The only solution is to keep refreshing the page or a (hidden?) (i)frame, or
keep polling a custom php-page with the additional info using XMLHTTPRequest
and the like in javascript. Maybe there is something to be found in Java
applets, but those are outside my area of expertise :-).
Depending on what your actual goal is here (limited amount of known & logged
in users that monitor something?), there could be much better options then
browsers. Preferaply applications that can listen and respond to incoming
traffic on a certain port. Those really aren't my cup of tea, but I'd
imagine someone knowing C++ can whip one up. It would likely be much faster
and accurate then anything you can achieve in a browser.
Grtz,
--
Rik Wasmus
.
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