Integration of ICS/CalDav calendars with username and password

[techsupportkoeln]

My calendars are only accessible via ICS/CalDAV with username and password. How did you solve this?

[techsupportkoeln]

I found the following quick and dirty solution. Maybe it will help others too.

I use a script to download the ICS file to the InkyPi every 30 minutes. An nginx web server on the InkyPi then makes the ICS file available.

This allows me to download the ICS file with a username and password and access it in the InkyPi web interface without having to enter a password.

To prevent access to the ICS file on the local network, port 81 can be blocked using ufw. The InkyPi can then retrieve the ICS file at 127.0.0.1, but retrieval from external networks is blocked.

sudo apt install nginx

nano /etc/nginx/sites-available/default

change the http port from 80 to 81 in the nginx configuration.

sudo systemctl restart nginx

You should now see the default nginx index page unter http://your-ip:81

create the download script:

mkdir /opt/calendar
nano /opt/calendar/calendar.sh

and insert:

`#!/bin/bash

CALENDAR_URL="https://caldav.example.com/remote.php/dav/calendars/username/personal"
OUTPUT_FILE="/var/www/html/mein_kalender.ics"

echo "Lade Kalender herunter..."

if curl -L -s --netrc -o "$OUTPUT_FILE" "$CALENDAR_URL"; then
echo "Kalender erfolgreich nach $OUTPUT_FILE heruntergeladen."
else
echo "Fehler beim Herunterladen des Kalenders. Exit-Code: $?"
fi`

We need to make the script executable.

chmod +x /opt/calendar/calendar.sh

and we need to enter the credential for the ics file:

nano ~/.netrc

machine caldav.example.com
login mein_benutzer
password mein_super_geheimes_passwort

chmod 600 ~/.netrc

at least we need to create a cronjob

crontab -e
*/30 * * * * /opt/calendar/calendar.sh