ns-login

#!/bin/sh
# Logs in automatically to the "WiFi in de trein" public hotspots, located in
# trains in the Netherlands.
# Requires: curl, sed
#
# Based on: https://gist.github.com/mid-kid/b60563059a393f90522f5e57aabfc493
set -e

ssid="Wifi in de trein"

# Check if we are online
if ping -W 0.5 -c 1 8.8.8.8 > /dev/null; then
    echo "Already online"
    exit 1
fi

current_ssid="$(nmcli -t -f active,ssid dev wifi list --rescan no | awk -F: '/^yes/{ print $2 }')"

if [ "$current_ssid" != "$ssid" ]; then
    echo "Not connected to \"$ssid\""
    exit 1
fi

tmp="$(mktemp -d -p '' 'hslogin.XXXXXXXXXX')"
# shellcheck disable=2064
trap "rm -r '$tmp'" EXIT

curl="curl -s -v -m 30"

$curl -c "$tmp/cookies" \
    'http://portal.nstrein.ns.nl/' \
        > "$tmp/page" \
        2> /dev/null

token="$(sed -n -e 's/.* id="csrfToken" value="\([^"]*\)" .*/\1/p' "$tmp/page")"

test -n "$token"

$curl -b "$tmp/cookies" \
    -X POST \
    -H 'Content-Length: 0' \
    -H 'Origin: http://portal.nstrein.ns.nl' \
    -H 'Referer: http://portal.nstrein.ns.nl/' \
    -H 'X-Requested-With: XMLHttpRequest' \
    -H 'Connection: close' \
    "http://portal.nstrein.ns.nl/nstrein:main/internet?csrfToken=$token" \
        > /dev/null \
        2> /dev/null


echo "Connected"

if ping -W 0.5 -c 1 8.8.8.8 > /dev/null; then
    echo "Internet available"
else
    echo "Still not online"
    exit 1
fi