Add module for DL server

dl-server/install.sh

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+#!/usr/bin/env bash
+
+run_directory=$(dirname "$0")
+
+source "$run_directory/variables.conf"
+
+if [ -f $run_directory/.disabled ]; then
+  echo "Installation is disabled. Exiting..."
+  exit 0
+fi
+
+echo "Copying Systemd units to system directory..."
+sudo cp $run_directory/transmission-daemon.service /etc/systemd/system/
+sudo sed -i -e "s/PH_AUTHORIZED_ADDRESSES/$authorized_ips/g" /etc/systemd/system/transmission-daemon.service
+sudo sed -i -e "s/PH_USER/$user/g" /etc/systemd/system/transmission-daemon.service
+sudo sed -i -e "s/PH_PASSWORD/$password/g" /etc/systemd/system/transmission-daemon.service
+sudo sed -i -e "s:PH_DL_LOCATION:$dl_location:g" /etc/systemd/system/transmission-daemon.service
+sudo cp $run_directory/transmission-vpn.service /etc/systemd/system/
+sudo sed -i -e "s:PH_DIRECTORY:$(pwd):g" /etc/systemd/system/transmission-vpn.service
+sudo cp $run_directory/transmission-vpn.timer /etc/systemd/system/
+
+echo "Finished install. Exiting..."
+exit 0

dl-server/transmission-daemon.service

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+[Unit]
+Description=Transmission BitTorrent Daemon (KTO)
+Wants=transmission-vpn.service
+BindsTo=transmission-vpn.timer
+After=network.target transmission-vpn.timer
+
+[Service]
+User=debian-transmission
+Type=notify
+ExecStart=/usr/bin/transmission-daemon -f --log-error -a PH_AUTHORIZED_ADDRESSES -C -t -u PH_USER -v PH_PASSWORD -w PH_DL_LOCATION
+ExecStop=/bin/kill -s STOP $MAINPID
+ExecReload=/bin/kill -s HUP $MAINPID
+NoNewPrivileges=true
+
+[Install]
+WantedBy=multi-user.target

dl-server/transmission-vpn.service

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+[Unit]
+Description=Make sure VPN is active for Transmission
+OnFailure=transmission-daemon.service
+
+[Service]
+ExecStart=PH_DIRECTORY/transmission-vpn.sh
+
+[Install]
+WantedBy=default.target

dl-server/transmission-vpn.sh

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+#!/bin/bash
+# The purpose of this script is to check if VPN connection is active
+# This script will be called (via a service) in 2 situations:
+  # On a regular basis when transmission is running
+    # This will be achieved with a timer started and stopped with transmission service
+  # On transmission starting
+# When the script exits with failure, associated service should try to start transmission service
+# Thus this script will be executed again
+  # We can enter an infinite loop, but this will effectively prevent transmission from connecting
+# If both services are stopped, this script will never be run by error
+
+source "$run_directory/variables.conf"
+
+# Parameters
+myip_request="curl -s -4 https://ifconfig.co"
+vpn_service="openvpn-client@vpn.service"
+transmission_service="transmission-daemon.service"
+
+# Main process
+ip=$($myip_request)
+if [[ $ip = $real_ip ]]; then
+  systemctl stop $transmission_service
+  systemctl stop $vpn_service
+  sleep 3
+  systemctl start $vpn_service
+  sleep 5
+  exit 1
+elif [[ $ip =~ (25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3} ]]; then
+  exit 0
+else
+  exit 1
+fi

dl-server/transmission-vpn.timer

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+[Unit]
+Description=Regular check for VPN while Transmission is running
+BindsTo=transmission-daemon.service
+
+[Timer]
+OnUnitInactiveSec=10m
+
+[Install]
+WantedBy=default.target

dl-server/variables.conf.template

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+#!/usr/bin/env bash
+
+# Copy this file as variables.conf, with the correct values
+
+real_ip="" # for VPN check
+authorized_ips="" # for transmission web interface
+user="" # user for transmission web interface
+password="" # password for transmission web interface
+dl_location="" # location of Downloads directory