How do I load data from a dynamic json file?

Hi,

To test and finetune a lot of properties (different speeds, strengths, powers, ...) in my game I want to be able to change them while playing the game. All the values are in a dictionary, which is loaded from a json-file. I can host the game and the file on the same webserver (to prevent cross-domain problems which I have in preview mode) and change the values in the json-file on this server.

But when I change the values and reload the json-file in the project, the data imported from the file isn't changed. Even if I reload (ctrl + F5) the gamepage, it still loads the old data that doesn't exist anymore.

I made a new project with a simplified version of this problem:

Any ideas to solve this?

Thanks!

Wim

Not particularly familiar with this, but stackoverflow.com/questions/367786/prevent-browser-caching-of-ajax-call-result sounds relevant.

You may need to include jquery as a javascript library in your project. I'm not familiar enough with javascript or jquery to know if you can do it without the jquery library.

Although seems to me this should be (to my limited knowledge) a server side setting, on your webserver, to never serve cached files. Or at least for the directory your updated files reside in.

This tip of oosyrag about caching seems to get me a step along the way, but I'm not there yet.

To avoid a cached result, JQuery doesn't seem necessary, adding a unique ID to the URL should be enough if I understand the following correctly. But unfortunately it doesn't work. I still get the same result.

w3schools.com/js/js_ajax_http_send.asp:

In the example above, you may get a cached result. To avoid this, add a unique ID to the URL:

xhttp.open("GET", "demo_get.asp?t=" + Math.random());

xhttp.send();

So I tried:

url":"\"https://www.mysite.be/testjson/MyDictionary.json?t=" & random(1000)"

But with no effect on the caching.

Wim

The caching doesn't seem the (only or main) reason. I discovered where to find the cached json-file (https://developer.chrome.com/docs/devtools/storage/cache/) and deleted the json-file (and even all the other cached files). But I still get the data from the old json file. Even after closing the tab and restarting the application. I still get the old data. This old data doesn't exist anymore at this point, so where is he getting this data??

Wim

Like I mentioned, is most likely server side.

Routers also have the ability to cache requests in some scenarios to save bandwidth, this may happen in a commercial or institutional setting, unlikely for home internet though.

The caching doesn't seem the (only or main) reason. I discovered where to find the cached json-file (https://developer.chrome.com/docs/devtools/storage/cache/) and deleted the json-file (and even all the other cached files). But I still get the data from the old json file. Even after closing the tab and restarting the application. I still get the old data. This old data doesn't exist anymore at this point, so where is he getting this data??

Wim

Are you sure your referencing the right dictionary? It appears you have 2.

The one getting loaded at the start is not the same as the one you load manually.

Lennaert,

Thank you for your response.

I started with one dictionary, but added a second one, just to be sure I don't display the data from the first dictionary. So I know yes.

Wim

Like I mentioned, is most likely server side.

Routers also have the ability to cache requests in some scenarios to save bandwidth, this may happen in a commercial or institutional setting, unlikely for home internet though.

I'm at a home network, my router can't cache sites.

Only possibility left is your web host server settings then.

Only possibility left is your web host server settings then.

The main problem seemed to be a 'hidden' (I couldn't find it) cashing of files in Google Chrome, 'incognitomodus' of Chrome solved my problem.

Thanks for your help!

Wim