don't use trailing slashes in URLs

acronomy/settings.py

@@ -48,7 +48,8 @@ MIDDLEWARE = [
     'django.contrib.auth.middleware.AuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
-    'simple_history.middleware.HistoryRequestMiddleware'
+    'simple_history.middleware.HistoryRequestMiddleware',
+    'common.redirect.NoTrailingSlashMiddleware'
 ]
 
 ROOT_URLCONF = 'acronomy.urls'

common/redirect.py

@@ -0,0 +1,21 @@
+from django.http import HttpResponseRedirect
+
+
+class NoTrailingSlashMiddleware:
+
+    def __init__(self, get_response):
+        self.get_response = get_response
+
+    def __call__(self, request):
+        old_url: str = request.path
+        if (
+                old_url.endswith('/')
+                and not old_url.startswith("/admin")
+                and not old_url.startswith("/api")
+                and not old_url == "/"
+        ):
+            new_url = old_url[:-1]
+            return HttpResponseRedirect(new_url)
+        response = self.get_response(request)
+
+        return response