Open localhost:3000 in kiosk mode after the Node.js server has finished spinning up-CodePudding

I'm working on a raspberry pi project that involves running a node server in kiosk mode.

I'm using BROWSER=none to suppress the default opening of the localhost upon the server being run.

I'm thinking I should be able to use wait-on to force the bash script that runs the kiosk mode to wait until the server is fully up. Would I use something like this?

"scripts": {
    ...
    "kiosk": "concurrently -n \"npm start\" \"wait-on http://localhost:3000 & /home/pi/kiosk.sh\""
  },

It gives me the following error(s) which I'm not quite able to decipher:

[npm start] server does not have extension for -dpms option
[npm start] libEGL warning: DRI2: failed to authenticate
[npm start] [1498:1498:1125/180040.467781:ERROR:gpu_init.cc(441)] Passthrough is not supported, GL is egl
[npm start] [1498:1498:1125/180040.786918:ERROR:viz_main_impl.cc(162)] Exiting GPU process due to errors during initialization
[npm start] [1558:1558:1125/180041.392714:ERROR:gpu_init.cc(441)] Passthrough is not supported, GL is swiftshader
[npm start] [1443:1590:1125/180042.359030:ERROR:object_proxy.cc(622)] Failed to call method: org.freedesktop.DBus.Properties.Get: object_path= /org/freedesktop/UPower: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.UPower was not provided by any .service files
[npm start] [1443:1590:1125/180042.364570:ERROR:object_proxy.cc(622)] Failed to call method: org.freedesktop.UPower.GetDisplayDevice: object_path= /org/freedesktop/UPower: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.UPower was not provided by any .service files
[npm start] [1443:1590:1125/180042.367155:ERROR:object_proxy.cc(622)] Failed to call method: org.freedesktop.UPower.EnumerateDevices: object_path= /org/freedesktop/UPower: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.UPower was not provided by any .service files
[npm start] Fontconfig error: Cannot load default config file: No such file: (null)

I'm now realizing the error in my code has more to do with kiosk.sh than it does with the npm commands. Here's the code to kiosk.sh:

#!/bin/bash

xset s noblank
xset s off
xset -dpms

unclutter -root &

sed -i 's/"exited_cleanly":false/"exited_cleanly":true/' /home/pi/.config/chromium/Default/Preferences
sed -i 's/"exit_type":"Crashed"/"exit_type":"Normal"/' /home/pi/.config/chromium/Default/Preferences

/usr/bin/chromium-browser --noerrdialogs --disable-infobars --kiosk http://localhost:3000/ &

CodePudding user response：

I assume that you are using the package "wait-on" (https://www.npmjs.com/package/wait-on). The wait-on command is used without npm in front of it.

Try to use

wait-on http://localhost:3000 && /home/pi/kiosk.sh

CodePudding user response：

You could use the "child_process" npm package to execute your bash script once the server is ready. Assuming you use Express.js in your backend, this should work with little modification

const exec = require('child_process');
//all your other codes and whatevers
app.listen(3000, () => {
    var kiosk = exec('sh kiosk.sh',
        (error, stdout, stderr) => {
            if (error) {
                console.log(`exec error: ${error}`);
            }
     });
});