add content type headers to netbox requests to stay compliant

module/netbox/connection.py

@@ -66,10 +66,14 @@ class NetBoxHandler:
     # keep track of already resolved dependencies
     resolved_dependencies = set()
 
-    def __init__(self, settings=None, inventory=None):
+    # set bogus default version
+    version = "0.0.1"
+
+    def __init__(self, settings=None, inventory=None, version=None):
 
         self.settings = settings
         self.inventory = inventory
+        self.version = version
 
         self.parse_config_settings(settings)
 
@@ -191,7 +195,8 @@ class NetBoxHandler:
 
         header = {
             "Authorization": f"Token {self.api_token}",
-            "User-Agent": "netbox-sync/0.0.1"
+            "User-Agent": f"netbox-sync/{self.version}",
+            "Content-Type": "application/json"
         }
 
         session = requests.Session()

netbox-sync.py

@@ -79,7 +79,7 @@ def main():
     netbox_settings = get_config(config_handler, section="netbox", valid_settings=NetBoxHandler.settings)
 
     # establish NetBox connection
-    nb_handler = NetBoxHandler(settings=netbox_settings, inventory=inventory)
+    nb_handler = NetBoxHandler(settings=netbox_settings, inventory=inventory, version=__version__)
 
     # if purge was selected we go ahead and remove all items which were managed by this tools
     if args.purge is True: