iFrame blank when displaing http://<ipaddress LMS server>:9000/material

[stephanvdplas]

@stephanvdplas There is another thing:

In the preview tab of the content it shows: Failed to load response data: Connection is closed, can’t dispatch pending call to Network.getResponseBody

[sdetweil]

@stephanvdplas now I am out of my knowledge range.

@karsten13 maybe has more skill here…

[karsten13]

@sdetweil said in iFrame blank when displaing http://<ipaddress LMS server>:9000/material:

@karsten13 maybe has more skill here…

sorry, no. Maybe google has some findings.

[karsten13]

you could try adding

        electronOptions: {
                webPreferences: { webSecurity: false },
        },

in config.js

[stephanvdplas]

@karsten13 good option. I tried it (actually I placed the option directly in the electron.js script) but it doesn’t change the situation at all.

[karsten13]

@stephanvdplas

I can only guess without having the debug case …

You can google and try changing electronOptionsDefaults and/or electronSwitchesDefaults in js/electron.js if you find something …

[stephanvdplas]

@karsten13 I am quite sure about having the config right:

	let electronSwitchesDefaults = ["autoplay-policy", "no-user-gesture-required"];
	app.commandLine.appendSwitch(...new Set(electronSwitchesDefaults, config.electronSwitches));
	let electronOptionsDefaults = {
		width: electronSize.width,
		height: electronSize.height,
		icon: "mm2.png",
		x: 0,
		y: 0,
		darkTheme: true,
		webPreferences: {
			contextIsolation: true,
			nodeIntegration: false,
			zoomFactor: config.zoom,
			webSecurity: false
		},
		backgroundColor: "#000000"
	};

	// DEPRECATED: "kioskmode" backwards compatibility, to be removed
	// settings these options directly instead provides cleaner interface
	if (config.kioskmode) {
		electronOptionsDefaults.kiosk = true;
	} else {
		electronOptionsDefaults.show = false;
		electronOptionsDefaults.frame = false;
		electronOptionsDefaults.transparent = true;
		electronOptionsDefaults.hasShadow = false;
		electronOptionsDefaults.fullscreen = true;
	}

	const electronOptions = Object.assign({}, electronOptionsDefaults, config.electronOptions);

	// Create the browser window.
	mainWindow = new BrowserWindow(electronOptions);

So the webSecurity line is the only thing I added/changed.

[karsten13]

@stephanvdplas said in iFrame blank when displaing http://<ipaddress LMS server>:9000/material:

I am quite sure about having the config right

sorry, my point is you have to google the error with the keyword “electron” and check if you find something which you can test

[stephanvdplas]

@karsten13 sorry to report that there is no other possibility than to revert back to electron 30.0.0
After this, the iFrame works again. After re-installing 31.0.0, it is broken again.
So no I have implemented this workaround.

sudo npm install electron@30.0.0

this command saved my life mirror

[sdetweil]

@stephanvdplas unrelated to your problem is your solution technique.

we provide access to these settings in config.js so you DON’T edit our code, as this causes update problems.