test

backend/src/api/nft_manager.py

@@ -62,6 +62,18 @@ class NftManager:
             return json.loads(out)
         except json.JSONDecodeError as e:
             raise NftError(f"json decode error: {e}")
+        
+    def list_rules_text(self) -> str:
+        """
+        Obtain nft list ruleset in textual form. This is a fallback if JSON parsing fails.
+        Returns raw textual output on success, raises NftError on failure.
+        """
+        self.nft.set_json_output(False)  # best-effort attempt to disable JSON output
+        res = self.cmd("list ruleset")
+        self.nft.set_json_output(True)  # restore JSON output preference
+        if res["rc"] != 0:
+            raise NftError(f"nft list ruleset failed: {res['stderr']}")
+        return res["stdout"] or ""
 
     def list_chain_text(self, family: str, table: str, chain: str) -> str:
         """
@@ -696,6 +708,8 @@ def list_rules():
     try:
         try:
             nft_json = mgr.list_rules_json()
+            nft_text = mgr.list_rules_text()
+            logger.error("Successfully obtained nft JSON ruleset, but also got textual output: %r", nft_text)
         except NftError as e:
             logger.debug("could not obtain nft JSON ruleset: %s", e)
             text = mgr.list_rules_json()