Set canonical_url domain in settings

config/settings.py

@@ -32,6 +32,9 @@ LOCALE_PATHS = [
     BASE_DIR / 'locale',
 ]
 
+# Hostname for canonical_url
+CANONICAL_HOST = "nyymix.net"
+
 
 # Application definition
 INSTALLED_APPS = [
@@ -76,6 +79,7 @@ TEMPLATES = [
                 'django.template.context_processors.request',
                 'django.contrib.auth.context_processors.auth',
                 'django.contrib.messages.context_processors.messages',
+                'gallery.context_processors.canonical_url_processor',
             ],
         },
     },

gallery/context_processors.py

@@ -0,0 +1,16 @@
+from django.conf import settings
+
+
+def canonical_url_processor(request):
+    if settings.DEBUG:
+        canonical_url = request.build_absolute_uri()
+    else:
+        current_host = request.get_host()
+        canonical_host = settings.CANONICAL_HOST
+
+        if current_host != canonical_host:
+            canonical_url = f"{request.scheme}://{canonical_host}{request.get_full_path()}"
+        else:
+            canonical_url = request.build_absolute_uri()
+
+    return {'canonical_url': canonical_url}