From 9b8ef2ccfa1562cebca65633c4394ffaaf5c3c8b Mon Sep 17 00:00:00 2001
From: omavashia <omavashia1233@gmail.com>
Date: Sun, 20 Jul 2025 05:05:21 +0530
Subject: [PATCH] fix Issue #2418: parse_rfc3339 calling .groups() on None

---
 kubernetes/base/config/dateutil.py | 52 +++++++++++++++++-------------
 kubernetes/test/test_api_client.py | 29 +++++++++++++++++
 2 files changed, 59 insertions(+), 22 deletions(-)

diff --git a/kubernetes/base/config/dateutil.py b/kubernetes/base/config/dateutil.py
index 972e003eba..331067759a 100644
--- a/kubernetes/base/config/dateutil.py
+++ b/kubernetes/base/config/dateutil.py
@@ -53,29 +53,37 @@ def parse_rfc3339(s):
         if not s.tzinfo:
             return s.replace(tzinfo=UTC)
         return s
-    groups = _re_rfc3339.search(s).groups()
-    dt = [0] * 7
-    for x in range(6):
-        dt[x] = int(groups[x])
-    us = 0
-    if groups[6] is not None:
-        partial_sec = float(groups[6].replace(",", "."))
-        us = int(MICROSEC_PER_SEC * partial_sec)
-    tz = UTC
-    if groups[7] is not None and groups[7] != 'Z' and groups[7] != 'z':
-        tz_groups = _re_timezone.search(groups[7]).groups()
-        hour = int(tz_groups[1])
-        minute = 0
-        if tz_groups[0] == "-":
-            hour *= -1
-        if tz_groups[2]:
-            minute = int(tz_groups[2])
-        tz = TimezoneInfo(hour, minute)
-    return datetime.datetime(
-        year=dt[0], month=dt[1], day=dt[2],
-        hour=dt[3], minute=dt[4], second=dt[5],
-        microsecond=us, tzinfo=tz)
 
+    match = _re_rfc3339.search(s)
+
+    if match is None:
+        raise ValueError(f"Error in RFC339 Date Formatting {s}")
+    try:
+        groups = match.groups()
+
+        dt = [0] * 7
+        for x in range(6):
+            dt[x] = int(groups[x])
+        us = 0
+        if groups[6] is not None:
+            partial_sec = float(groups[6].replace(",", "."))
+            us = int(MICROSEC_PER_SEC * partial_sec)
+        tz = UTC
+        if groups[7] is not None and groups[7] != 'Z' and groups[7] != 'z':
+            tz_groups = _re_timezone.search(groups[7]).groups()
+            hour = int(tz_groups[1])
+            minute = 0
+            if tz_groups[0] == "-":
+                hour *= -1
+            if tz_groups[2]:
+                minute = int(tz_groups[2])
+            tz = TimezoneInfo(hour, minute)
+        return datetime.datetime(
+            year=dt[0], month=dt[1], day=dt[2],
+            hour=dt[3], minute=dt[4], second=dt[5],
+            microsecond=us, tzinfo=tz)
+    except Exception:
+        raise ValueError(f"Error in RFC339 Date Formatting {s}")
 
 def format_rfc3339(date_time):
     if date_time.tzinfo is None:
diff --git a/kubernetes/test/test_api_client.py b/kubernetes/test/test_api_client.py
index 486b4ac5b8..375963e7eb 100644
--- a/kubernetes/test/test_api_client.py
+++ b/kubernetes/test/test_api_client.py
@@ -8,6 +8,8 @@
 import kubernetes
 from kubernetes.client.configuration import Configuration
 import urllib3
+import datetime
+from kubernetes.config import dateutil as kube_dateutil
 
 class TestApiClient(unittest.TestCase):
 
@@ -49,3 +51,30 @@ def test_rest_proxycare(self):
             # test
             client = kubernetes.client.ApiClient(configuration=config)
             self.assertEqual( expected_pool, type(client.rest_client.pool_manager) )
+    
+    def test_1_parse_rfc3339(self):
+        dt = datetime.datetime(2023, 1, 1, 12, 0, 0)
+        result = kube_dateutil.parse_rfc3339(dt)
+        self.assertIsNotNone(result.tzinfo)
+    
+    def test_2_parse_rfc3339(self):
+        """Test that invalid RFC3339 strings raise ValueError with descriptive message"""
+        invalid_inputs = [
+            "invalid-datetime-string",
+            "",
+            "not-a-date",
+            "2023",  # incomplete
+            "random text",
+            "2023-13-01T12:00:00Z",  # invalid month
+            "not-rfc3339-format"
+        ]
+        
+        for invalid_input in invalid_inputs:
+            with self.subTest(input=invalid_input):
+                with self.assertRaises(ValueError) as context:
+                    kube_dateutil.parse_rfc3339(invalid_input)
+                
+                # Check that the error message includes the invalid input
+                error_message = str(context.exception)
+                self.assertIn("Error in RFC339 Date Formatting", error_message)
+                self.assertIn(invalid_input, error_message)
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