Init

.gitignore

@@ -0,0 +1,4 @@
+.vscode
+.DS_Store
+settings.conf
+test.py

README.md

@@ -0,0 +1,19 @@
+# Namesilo updater
+
+## Prerequisite
+
+`NAMESILO_API` in environment variable
+
+`settings.conf` in the same directory
+
+[default]
+domain=example.com
+subdomain=dynamic
+
+### Python3 library
+
+You probably don't need anything extra from python3. Tested on python 3.5.2 and 3.6.4
+
+## What to make this works?
+
+Adding `python3 update.py` to crontab should do the trick. Once a day should be enough IMHO.

update.py

@@ -0,0 +1,88 @@
+import configparser
+import os
+import sys
+
+import xml.etree.ElementTree as ET
+from requests import get
+
+BASE_URL = 'https://www.namesilo.com/api/dnsUpdateRecord?version=1&type=xml&'
+UPDATE_URL = '{base}key={key}&domain={domain}&rrid={rrid}&' \
+    'rrhost={host}&rrvalue={new_value}&rrttl=7207'
+LIST_URL = '{base}key={key}&domain={domain}'
+
+EVERYDAY_IP_SERVICE = 'https://tool.everyday.in.th/ip?format=text'
+
+'''Updater procedure
+1. Getch a new public IP
+2. Get a namesilo's DNS
+3. check if 1 & 2 are different, then Update
+'''
+
+
+def get_public_ip():
+    '''Get current public IP
+
+    return IP or None
+    '''
+    res = get(EVERYDAY_IP_SERVICE)
+    if res.status_code != 200:
+        return None
+    return res.text.strip()
+
+def get_namesilo_dns(key, domain, target_host):
+    res = get(LIST_URL.format(base=BASE_URL, key=key, domain=domain))
+    if res.status_code != 200:
+        return None
+    tree = ET.fromstring(res.text.strip())
+    for i in tree.iter('resource_record'):
+        host = i.find('./host').text
+        if host == target_host:
+            return {
+                'rrid': i.find('./host').text,
+                'value': i.find('./value').text,
+                'host': host,
+            }
+            break
+    return {}
+
+
+def update_namesilo_data(key, domain, rrid, subdomain, new_value):
+    res = get(UPDATE_URL.format(base=BASE_URL, key=key, domain=domainม
+                                rrid=rrid, host=host, new_value=new_value))
+    if res.status_code != 200:
+        return None
+    return True
+
+
+def main():
+    api_key = os.environ['NAMESILO_API']
+    if not api_key:
+        print('NAMESILO_API in env is not found.')
+        sys.exit()
+    print('KEY: {}...'.format(api_key[:3]))
+    config = configparser.ConfigParser()
+    config.read('settings.conf')
+    domain = config['default']['domain']
+    subdomain = config['default']['subdomain']
+    target = '{}.{}'.format(subdomain, domain)
+    print('TARGET: {}'.format(target))
+    public_ip = get_public_ip()
+    print('PUBLIC IP: {}..'.format(public_ip[:-5]))
+    namesilo_data = get_namesilo_dns(api_key, domain, target)
+    if not namesilo_data:
+        print('NAMESILO API service is down or target not found')
+        sys.exit()
+
+    if namesilo_data['value'] == public_ip:
+        print('Current value is okay. No need to do anything')
+        sys.exit()
+
+    rrid = namesilo_data['rrid']
+    result = update_namesilo_data(api_key, domain, rrid, subdomain, public_ip)
+    if not result:
+        print('Updating process failed.')
+        sys.exit()
+    print('Updated to a new IP: {}'.format(public_ip))
+
+if __name__ == '__main__':
+    main()