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Hi,

I'm using a common login-feature (username-password). After the visitor enters its logincode, script-code must be inserted and executed. This has to be non-cacheable, because the visitor can log-out and login again with different loginlevel (administrator for example). This has to lead to different injected scriptcode. The code will be generated dynamically on the server.

I thought of 3 possible ways, but all fail me:

1. using Y.Get.script(url), where url has a timestamp (to prefend caching).
Problem is: I have got no reference of the YUI instance in the returned code.

2. using IO-module with a timestamped url.
Problem is: onSuccess returnes o.responseText as clear text. I don't know how to execute this as script code.

3. using a custom module:
Here I suffer the problem that the loader won't reload the module over and over again. It is cached. I thought of timestamping the url, but within the configurationobject this seems not possible. I also tried the force-field within the configurationobject. But this doesn't seem to force the module to be loaded all over again.

So my question is: which way is the best way to use. And how to get it work.

Any advise will be helpful.

Marco Asbreuk.

Hi Caridy,

First: indeed, the code is not on cdn: I can make it uncachable.
Reading your reply, I agree the 4th option is best. I didn't take a look into jsonp yet.

Anyway, still need a solution of how to execute js from the callback-function. So when an administrator logs in, something else should happen comparing to a normal member. I thing the solution would be something like:



You talked about dispatcher-like method. How does this work?
(By the way, YUI_config = { force: 'my-module' }; didn't prevent my custom module from loading every time…)

Kind regards,
Marco.

Hey Marco,

JSONP is actually a solution to avoid execution, the browser does that for you, and you will get a reference to the json object. Just do this:

Y.jsonp(url, function(data) {
// data is the json object you pass to the callback method at the server side.
// You still have access to Y here too
});

Your api should response with something like this in php:


Internally, JSONP module adds an script tag in the page, and set the url to:
http://your.domain.com/api?callback=YUI ... 4187597423

Internally, the library will create a global function under this reference: YUI.Env.JSONP.yui_3_3_0_1_1294184187597423

Which means that the browser will parse and execute the response from your API as a regular script, calling YUI.Env.JSONP.yui_3_3_0_1_1294184187597423, and passing data structure as the first parameter.

This dynamic function will be responsible for calling the callback function that you pass as a second argument on Y.jsonp.

That's all about jsonp.

Best Regards,
Caridy