Micha Schopman wrote:
> " Yup, it's basically an ad-hoc version of RPC. Or at least that's how
> people will inevitably end up using it. I find the whole fuss people are
> making about it just a little much myself."
>
> That is definitely not Ajax. Ajax is much more than simple remote
> procedure calls.
No, it is. I didn't say that it was just RPC (which is hardly simple), I
said that's how people would end up using it.
Here's what AJAX boils down to: using XMLHttpRequest to pull data from
the server. How this will probably end up being (ab)used to do is to
implement some kind of ad-hoc RPC mechanism by abusing HTTP's GET verb.
Christ, I've been doing stuff like this for years (albeit *not* abusing
GET), the only difference being that it's been returning JavaScript to
execute rather than a block of raw data. And all my requests were
naturally asynchronous. Heck, here's the code I use too:
function JSRequest(responder)
{
return function(args)
{
var parent = document.getElementsByTagName("body")[0];
// Remove any existing request block, if possible.
try
{
var old = document.getElementById("jsreqScript");
if (old)
parent.removeChild(old);
}
catch (ex) { /* Ignore */ }
// Build the call string, appending on any arguments.
var call = responder;
for (var name in args)
call += (call.indexOf("?") == -1 ? "?" : "&") +
escape(name) + "=" escape(args[name]);
// Build the new script element and put it in the head. The
// script is automatically fetched and ran.
var script = document.createElement("script");
script.id = "jsreqScript";
script.src = call;
script.type = "text/javascript";
script.defer = true;
parent.appendChild(script);
}
}
To use it, I just do something like this:
var GetUserDetails =
JSRequest("http://example.com/remote/getUserDetails.cfm";);
GetUserDetails({id: 5});
And I can do everything with that that you can do with AJAX. And I do
mean *everything* because, at least with the IE implementation, you
can't use POST, which means no complex data, and all the calls need to
be idempotent. As I said, AJAX isn't interesting, not in the slightest.
K.
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