refactor ipfy source

pddnsc/sources/ipfy.py

@@ -2,20 +2,18 @@ import httpx
 
 from pddnsc.base import BaseSourceProvider
 
-
+# https://www.ipify.org/
 class IPIFYSource(BaseSourceProvider):
     async def fetch_v4(self) -> str:
         async with httpx.AsyncClient(transport=self.ipv4t) as client:
-            response = await client.get("https://api4.ipify.org/?format=json")
-            if response.status_code == httpx.codes.OK:
-                data = response.json()
-                result = None if not isinstance(data, dict) else data.get("ip")
+            response = await client.get("https://api4.ipify.org")
+            if response.is_success:
+                result = response.text.strip() or None
         return result
 
     async def fetch_v6(self) -> str:
         async with httpx.AsyncClient(transport=self.ipv6t) as client:
-            response = await client.get("https://api6.ipify.org/?format=json")
-            if response.status_code == httpx.codes.OK:
-                data = response.json()
-                result = None if not isinstance(data, dict) else data.get("ip")
+            response = await client.get("https://api6.ipify.org")
+            if response.is_success:
+                result = response.text.strip() or None
         return result