make ipify api configurable & codestyle

now its possible to use a selfhosted ipify api instance instead of disclosing your ip to ipify.org

config-template.txt

@@ -13,8 +13,9 @@ a_name = raspbian
 ttl = 900
 
 # Production API
-api = https://dns.api.gandi.net/api/v5/
+gandi_api = https://dns.api.gandi.net/api/v5/
 
 # Number of retries for looking up our own IP address, since
 # the service seems to be flaky sometimes.
 retries = 3
+ipify_api = https://api.ipify.org

gandi_ddns.py

@@ -11,17 +11,18 @@ config_file = "config.txt"
 
 SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
 DEFAULT_RETRIES = 3
+DEFAULT_IPIFY_API = "https://api.ipify.org"
 
 
 class GandiDdnsError(Exception):
     pass
 
 
-def get_ip_inner():
+def get_ip_inner(ipify_api):
     # Get external IP
     try:
         # Could be any service that just gives us a simple raw ASCII IP address (not HTML etc)
-                r = requests.get('https://api.ipify.org', timeout=3)
+        r = requests.get(ipify_api, timeout=3)
     except requests.exceptions.RequestException:
         raise GandiDdnsError('Failed to retrieve external IP.')
     if r.status_code != 200:
@@ -37,14 +38,14 @@ def get_ip_inner():
     return ip
 
 
-def get_ip(retries):
+def get_ip(ipify_api, retries):
     # Get external IP with retries
 
     # Start at 5 seconds, double on every retry.
     retry_delay_time = 5
     for attempt in range(retries):
         try:
-                        return get_ip_inner()
+            return get_ip_inner(ipify_api)
         except GandiDdnsError as e:
             print('Getting external IP failed: %s' % e)
             print('Waiting for %d seconds before trying again' % retry_delay_time)
@@ -54,6 +55,7 @@ def get_ip(retries):
         print('Exhausted retry attempts')
         sys.exit(2)
 
+
 def read_config(config_path):
     # Read configuration file
     cfg = configparser.ConfigParser()
@@ -61,12 +63,14 @@ def read_config(config_path):
 
     return cfg
 
+
 def get_record(url, headers):
     # Get existing record
     r = requests.get(url, headers=headers)
 
     return r
 
+
 def update_record(url, headers, payload):
     # Add record
     r = requests.put(url, headers=headers, json=payload)
@@ -94,14 +98,16 @@ def main():
         apikey = config.get(section, 'apikey')
 
         # Set headers
-    headers = { 'Content-Type': 'application/json', 'X-Api-Key': '%s' % config.get(section, 'apikey')}
+        headers = {'Content-Type': 'application/json', 'X-Api-Key': '%s' % apikey}
 
         # Set URL
-    url = '%sdomains/%s/records/%s/A' % (config.get(section, 'api'), config.get(section, 'domain'), config.get(section, 'a_name'))
+        url = '%sdomains/%s/records/%s/A' % (config.get(section, 'gandi_api'),
+                                             config.get(section, 'domain'), config.get(section, 'a_name'))
         print(url)
         # Discover External IP
+        ipify_api = config.get(section, 'ipify_api', fallback=DEFAULT_IPIFY_API)
         retries = int(config.get(section, 'retries', fallback=DEFAULT_RETRIES))
-    external_ip = get_ip(retries)
+        external_ip = get_ip(ipify_api, retries)
         print(('External IP is: %s' % external_ip))
 
         # Prepare record
@@ -120,5 +126,6 @@ def main():
 
         update_record(url, headers, payload)
 
+
 if __name__ == "__main__":
     main()