From 049f746f158ad8bc29bba9bc58fcc2f0c5e7260b Mon Sep 17 00:00:00 2001
From: Louis Lacoste <lordof20th@hotmail.fr>
Date: Mon, 14 Mar 2022 17:55:13 +0100
Subject: [PATCH] Creation of the script gandyndns.py

---
 gandyndns.py | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 gandyndns.py

diff --git a/gandyndns.py b/gandyndns.py
new file mode 100644
index 0000000..058b7dc
--- /dev/null
+++ b/gandyndns.py
@@ -0,0 +1,63 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# @author: lordof20th
+
+import requests
+
+# Defines the URL to access the API and the resource
+fqdn = "example.com"
+rrset_name = "@"
+rrset_type = "A"
+apiUrl = f"https://api.gandi.net/v5/livedns/domains/{fqdn}/records/{rrset_name}/{rrset_type}"
+
+# Define the headers to use for the API
+apikey = "account-api-key"
+headers={"Authorization": f"Apikey {apikey}", 'User-Agent': 'Mozilla/5.0', "Content-Type": "application/json"}
+
+
+def retrieve_dns_IP(headers, apiUrl):
+    """Retrieves the IP in the DNS record using the fqdn, rrset_name (for instance subdomain like www etc) and rrset_type (the DNS record type A, CNAME ...).
+    
+    The function uses requests library and connect to Gandi.net API
+    
+    Returns:
+            retrievedDnsIp (str): string of the IP address in the DNS record"""
+    
+    response = requests.get(apiUrl, headers=headers)
+
+    responseJson = response.json()  # IPs are stored in a list as string
+    retrievedDnsIp = responseJson['rrset_values'][0]
+    return retrievedDnsIp
+
+def retrieve_public_IP():
+    """Retrieves the public IP by connecting to ipinfo.io API
+    
+    Returns:
+            data['ip'] (str) : string of the public IP address"""
+    endpoint = "https://ipinfo.io/json"
+    response = requests.get(endpoint, verify = True)
+    
+    data = response.json()
+    return data['ip']
+
+def update_dns_IP(apiUrl, headers, currentPublicIP):
+    """Updates the IP in the DNS record using the IP provided (acquired by retrieve_public_IP)"""
+    data = {
+    "rrset_values": [currentPublicIP]
+    }
+
+    requests.put(url=apiUrl, headers=headers, json=data)
+
+def main():
+    dnsIP = retrieve_dns_IP(headers, apiUrl)
+
+    currentPublicIP = retrieve_public_IP()
+
+    if dnsIP != currentPublicIP: # We need to update the A record to match our IP
+        update_dns_IP(apiUrl, headers, currentPublicIP)
+        print(f"Old IP : {dnsIP} replaced -> by New IP : {currentPublicIP}")
+    else:
+        print("IPs are the same.")
+
+if __name__ == "__main__":
+    main()
\ No newline at end of file