Fix #2685: Redirect Latest News links to blog.python.org

- Updates python.org RSS parser to rewrite pythoninsider.blogspot.com URLs over to the canonical blog.python.org host.
- Adds data migration to fix existing BlogEntry links previously imported from the old blogger domain.
- Covers URL domain replacement inside test_parser.py.

Author: iampujan

apps/blogs/migrations/0004_auto_20260222_0834.py

@@ -0,0 +1,21 @@
+# Generated by Django 5.2.11 on 2026-02-22 08:34
+
+from django.db import migrations
+
+
+def rewrite_blog_urls(apps, schema_editor):
+    BlogEntry = apps.get_model("blogs", "BlogEntry")
+    for entry in BlogEntry.objects.filter(url__contains="pythoninsider.blogspot.com"):
+        entry.url = entry.url.replace("pythoninsider.blogspot.com", "blog.python.org")
+        entry.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('blogs', '0003_alter_relatedblog_creator_and_more'),
+    ]
+
+    operations = [
+        migrations.RunPython(rewrite_blog_urls, migrations.RunPython.noop),
+    ]

apps/blogs/parser.py

@@ -18,11 +18,16 @@ def get_all_entries(feed_url):
     for e in d["entries"]:
         published = datetime.datetime(*e["published_parsed"][:7], tzinfo=datetime.UTC)
 
+        # Rewrite Blogger domains to canonical python.org domain (Issue #2685)
+        url = e["link"].replace(
+            "//pythoninsider.blogspot.com",
+            "//blog.python.org"
+        )
         entry = {
             "title": e["title"],
             "summary": e.get("summary", ""),
             "pub_date": published,
-            "url": e["link"],
+            "url": url,
         }
 
         entries.append(entry)

apps/blogs/tests/test_parser.py

@@ -1,5 +1,6 @@
 import datetime
 import unittest
+from unittest.mock import patch
 
 from apps.blogs.parser import get_all_entries
 from apps.blogs.tests.utils import get_test_rss_path
@@ -24,3 +25,19 @@ def test_entries(self):
             self.entries[0]["url"],
             "http://feedproxy.google.com/~r/PythonInsider/~3/tGNCqyOiun4/introducing-electronic-contributor.html",
         )
+
+    @patch("apps.blogs.parser.feedparser.parse")
+    def test_rewrites_blogspot_url(self, mock_parse):
+        mock_parse.return_value = {
+            "entries": [
+                {
+                    "title": "Test Title",
+                    "summary": "Summary",
+                    "published_parsed": (2026, 2, 22, 12, 0, 0, 0, 0, 0),
+                    "link": "https://pythoninsider.blogspot.com/2026/02/test.html",
+                }
+            ]
+        }
+        entries = get_all_entries("http://fake.url")
+        self.assertEqual(len(entries), 1)
+        self.assertEqual(entries[0]["url"], "https://blog.python.org/2026/02/test.html")