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  1. #1
    Regular Coder mlse's Avatar
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    Question Difference between Callback and Response?

    Hi,

    I have recently been looking at a number of services that use HTTP gateways.

    These services refer to "Server Callback" and "Server Response", as if these were two different things ...

    As far as I am aware, the client (i.e. the browser) sends a request to the server (in this case the gateway), which then reponds by processing the post and get vars (where necessary) and sending back a local page (i.e. local to the gateway server), or performs a server-redirect to load a page on my webserver (and passes the post and get vars to it). As far as I am concerned, both of these behaviours are best described as "Server Response". What, then, is "Server Callback"? I have found plenty of google references to the two (obviously different) mechanisms, but I have found no explanation of what they actually are!

    If anyone knows, please could you let me know.

    TIA,
    Mike.
    Die Welt ist ein Irrenhaus und hier ist die Zentrale!

  • #2
    Senior Coder nikkiH's Avatar
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    Callback doesn't make the page loaded change.
    http://www.developer.com/net/asp/article.php/3506896

    If this post contains any code, I may or may not have tested it. It's probably just example code, so no getting knickers in a bunch over a typo, OK? If it doesn't have basic error checking in it, such as object detection or checking if objects are null before using them, put that in there. I'm giving examples, not typing up your whole app for you. You run code at your own risk.
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  • #3
    Regular Coder mlse's Avatar
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    Thanks for that info! I thought it had to be something really simple!
    Die Welt ist ein Irrenhaus und hier ist die Zentrale!


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