Is there another way to disable cache when fetching script?

Question

I use this to fetch script;

$.getScript("http://www.example.org/");

However, I dont want it to be cached. Means that if I use getScript again, the script should fetch it again.

This one works in theory;

$.getScript("http://www.example.org/?" + Math.random());

But in practically, it's not. Because the "?" is disabled on the remote site url, so my question is, is there any otherway to tell browser to not cache ?

Yeah but that needed to be added to the remote site's page.If I could, I would first remove the "?" protection :) — user198989
– user198989, Commented Aug 31, 2015 at 4:24

baao · Accepted Answer · 2015-08-31 04:08:54Z

2

Recreate the function for your needs:

(function () {
    $.getScript = function(url, callback) {
        $.ajax({
                type: "GET",
                url: url,
                success: callback,
                dataType: "script",
                cache: false
        });
    };
})();

Now it won't cache anymore when you call the function like

$.getScript('script.js', function()
{
    // non cached script.js
});

answered Aug 31, 2015 at 4:08

baao

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1 Comment

user198989 Over a year ago

If you do this, as the logs I see, it adds the same. Like this /?=_768472138423

jfriend00 · Accepted Answer · 2015-08-31 04:15:04Z

0

The remote site cannot disable the effectiveness of "http://www.example.org/?" + Math.random() to prevent caching.

The point of the "?" + Math.random() is to create a unique URL that will not be in the local browser cache. It is the local browser that makes this caching decision and, for local browser caching, it does not matter if the remote site is ignoring the "?" + Math.random() part of the URL or not.

FYI, another way to address caching is for your server to return proper cache headers when this script is retrieved that instruct the browser to never cache this file.

edited Aug 31, 2015 at 4:15

answered Aug 31, 2015 at 4:12

jfriend00

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4 Comments

user198989 Over a year ago

They disabled "?" on the site url structure. So if you try to display like this, example.org/index.php?123 , it says forbidden. Because they disabled "?"

jfriend00 Over a year ago

@user198989 - OK, that's a little clearer description. Then you have to fix the problem with caching headers from the server.

user198989 Over a year ago

There must be something on the browser side. Maybe some meta tag to prevent cavhe.

jfriend00 Over a year ago

@user198989 - you can use <meta> tags in the page, but that's also a server-side thing. By the time you would add a <meta> tag via Javascript, the page will already be in the cache as it came from the server.

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