Label issue - does ESPUI do some sort of caching?

[Hacking-Away]

I am using a label to display an image:

image1Label = ESPUI.label("An Image Label", ControlColor::Peterriver, "<img src='path/to/image'>");

The img src is another webserver instance on the ESP, on port 81, serving only the image. This works fine, i see the image in the label.

I can update the label later just fine, with:

ESPUI.updateLabel(image1Label,"test update");

But if i change the image served by the above second server instance and try to update the label with:

ESPUI.updateLabel(image1Label, "<img src='path/to/image'>");

I still get the old image unless i use the browser to refresh the page.

If I go direct to the URL in the browser i can see it has indeed updated, so it's only ESPGUI that isn't getting the new image.

Is it some sort of caching?

Any ideas appreciated.... :-)

[Hacking-Away]

I think I have basically confirmed the CLIENT end of ESPUI is caching.... when i reboot the ESP32 and leave the browser page open, once it reboots and i click on a tab and back to the original tab a lot of things have updated, but only a hard browser refresh updats the image that is in the label.

How can I stop this.......?

[Hacking-Away]

I'm really trying to help myself here, but more knowledgable help would be much appreciated :-)

My test web app works fine, the only issue is when in my code i change the image which is displayed in a label, i need to refresh the browser.

I have sound in the ESPUI library files some things like:

#define UI_RELOAD MessageTypes::Reload

and

if(ClientUpdateType_t::ReloadNeeded == value) { // Serial.println(F("ESPUIclient::SendClientNotification:set type to reload")); document["type"] = int(UI_RELOAD);

Which looks like it does a client side reload of the UI which is what i want, but how can i make this happen from my Arduino code?

[Hacking-Away]

Well, i found this #68

And putting ESPUI.jsonReload(); which works for me! :-) After i get a new image i call label.update then ESPUI.jsonReload.