Shutdown Button

[HeikoGr]

It would be nice to have an shutdown option on the gui.

i am stuck with my programming skills. This is my attempt:

server.js add following endpoint:

var sys = require('util');
var exec = require('child_process');
var child;

app.get('/shutdown', function (req, res) {
    child = exec.execSync("sudo systemctl poweroff");
});

player/player.service.ts add function:
shutdown() { this.http.get('http://localhost:8200/shutdown').subscribe; }

for testing purposes i changed:
player/player.page.ts:
volUp() { this.playerService.sendCmd(PlayerCmds.VOLUMEUP); this.playerService.shutdown(); }

but the raspberry didn't shut down. If I open the endpoint :8200/shutdown the system shuts down.