uploaded file

ip_updater.sh

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+#!/bin/bash
+
+################################################################################
+# CONFIGURATION
+################################################################################
+
+# check every TIMEOUT seconds (default 300 = 5 min)
+TIMEOUT=300
+# user credentials
+USERNAME="ur goip username"
+PASSWORD="ur goip password"
+DOMAIN="urdomain.goip.it"
+# Discord webhook
+DISCORD_WEBHOOK_URL="" # leave empty to disable
+DISCORD_WEBHOOK_MESSAGE_UPDATE="DNS entry for $DOMAIN has been updated successfully."
+DISCORD_WEBHOOK_MESSAGE_FAIL="DNS entry update for $DOMAIN failed."
+
+################################################################################
+# END OF CONFIGURATION
+################################################################################
+
+function discord_update_message {
+    if [ -n $DISCORD_WEBHOOK_URL ]; then
+        local MESSAGE='{"username": "DNS Record Updater", "content": "'"$1"'"}'
+        echo $MESSAGE
+        wget -qO - --post-data="$MESSAGE" --header='Content-Type:application/json' "$DISCORD_WEBHOOK_URL"
+    fi
+}
+
+function get_ip {
+    # get a string in format 'ip=x.x.x.x' by splitting out a json over multiple lines and removing characters
+    local IP=$(wget -4qO - "https://api.myip.com" | sed 's/[\{\}]//g;s/,/\n/g' | sed -n 's/"//g;s/:/=/g;/ip/p')
+    if [ -z $IP ]; then
+        echo "Getting my own IP failed." >&2
+        echo "ip=0.0.0.0"
+    else
+        echo $IP
+    fi
+}
+
+function set_ip {
+    wget -qO - "https://goip.it/setip?username=$USERNAME&password=$PASSWORD&subdomain=$DOMAIN&$1"
+    local EXIT_CODE="$?"
+    echo "" # add newline after wget output
+    if [ $EXIT_CODE -ne 0 ]; then
+        echo "Setting a new IP using wget failed with exit code $EXIT_CODE." >&2
+        discord_update_message "$DISCORD_WEBHOOK_MESSAGE_FAIL"
+    else
+        discord_update_message "$DISCORD_WEBHOOK_MESSAGE_UPDATE"
+    fi
+}
+
+IP="ip=0.0.0.0"
+while true; do
+    NEW_IP=$(get_ip)
+    if [ $IP != $NEW_IP ]; then
+        echo -e "IP has changed. New IP:\n$NEW_IP"
+        IP="$NEW_IP"
+        set_ip "$IP"
+    fi
+    sleep $TIMEOUT
+done