Fixes: #18184 - Gracefully handle unavailable internet connection on RSS feed dashboard widget if ISOLATED_DEPLOYMENT is set (#18186)

* Suppress adding the RSS feed widget to the dashboard if ISOLATED_DEPLOYMENT is set

* Add config option on RSSFeedWidget to specify requires_internet and to display a more appropriate error if ISOLATED_DEPLOYMENT is set

* Remove skipping behavior from utils.py

* Add required=False

netbox/extras/constants.py

@@ -79,6 +79,7 @@ DEFAULT_DASHBOARD = [
             'feed_url': 'http://netbox.dev/rss/',
             'max_entries': 10,
             'cache_timeout': 14400,
+            'requires_internet': True,
         }
     },
     {

netbox/extras/dashboard/widgets.py

@@ -275,6 +275,7 @@ class RSSFeedWidget(DashboardWidget):
     default_config = {
         'max_entries': 10,
         'cache_timeout': 3600,  # seconds
+        'requires_internet': True,
     }
     description = _('Embed an RSS feed from an external website.')
     template_name = 'extras/dashboard/widgets/rssfeed.html'
@@ -285,6 +286,10 @@ class RSSFeedWidget(DashboardWidget):
         feed_url = forms.URLField(
             label=_('Feed URL')
         )
+        requires_internet = forms.BooleanField(
+            label=_('Requires external connection'),
+            required=False,
+        )
         max_entries = forms.IntegerField(
             min_value=1,
             max_value=1000,
@@ -309,6 +314,11 @@ class RSSFeedWidget(DashboardWidget):
         return f'dashboard_rss_{url_checksum}'
 
     def get_feed(self):
+        if self.config['requires_internet'] and settings.ISOLATED_DEPLOYMENT:
+            return {
+                'isolated_deployment': True,
+            }
+
         # Fetch RSS content from cache if available
         if feed_content := cache.get(self.cache_key):
             return {

netbox/templates/extras/dashboard/widgets/rssfeed.html

@@ -12,6 +12,10 @@
       <div class="list-group-item text-muted">{% trans "No content found" %}</div>
     {% endfor %}
   </div>
+{% elif isolated_deployment %}
+  <span class="text-danger">
+    <i class="mdi mdi-alert"></i> {% trans "This RSS feed requires an external connection. Check the ISOLATED_DEPLOYMENT setting." %}
+  </span>
 {% else %}
   {# There was an error retrieving/parsing the feed #}
   <span class="text-danger">