fix: Properly catch invalid IP passed to IPASN

Fix #5

client/pyipasnhistory/api.py

@@ -99,16 +99,21 @@ def query(self, ip: str, source: str='caida', address_family: str=None,
         :param aggregate: (only if more than one response) Aggregare the responses if the prefix and the ASN are the same
         '''
 
-        if '/' in ip:
-            # The user passed a prefix... getting the 1st IP in it.
-            network = ipaddress.ip_network(ip)
-            first_ip = network[0]
-            address_family = f'v{first_ip.version}'
-            ip = str(first_ip)
-
-        if not address_family:
-            ip_parsed = ipaddress.ip_address(ip)
-            address_family = f'v{ip_parsed.version}'
+        try:
+            if '/' in ip:
+                # The user passed a prefix... getting the 1st IP in it.
+                network = ipaddress.ip_network(ip)
+                first_ip = network[0]
+                address_family = f'v{first_ip.version}'
+                ip = str(first_ip)
+
+            if not address_family:
+                ip_parsed = ipaddress.ip_address(ip)
+                address_family = f'v{ip_parsed.version}'
+        except ValueError:
+            return {'meta': {'source': source},
+                    'error': f'The IP address is invalid: "{ip}"',
+                    'reponse': {}}
 
         to_query = {'ip': ip, 'source': source, 'address_family': address_family}
         if date: