WebSection: In case the url publishes a document, but there is trailing slash

raise 301 redirect to the url excluding the slash

This is different than Web Section.
But in Web Page we need no-slash since we would render all other sources
in the container Web Section, so keeping the caches

product/ERP5/Document/WebSection.py

@@ -137,6 +137,25 @@ class WebSection(Domain, DocumentExtensibleTraversableMixin):
           # if no document found, fallback on default page template
           document = DocumentExtensibleTraversableMixin.__bobo_traverse__(self, request,
             '404.error.page')
+
+      # In case the url publishes a document, but there is trailing slash
+      # raise 301 redirect to the url excluding the slash
+      # This is different than Web Section.
+      # But in Web Page we need no-slash since we would render all other sources
+      # in the container Web Section, so keeping the caches
+      if hasattr(document, 'getPortalType') \
+          and document.getPortalType() in self.getPortalObject().getPortalDocumentTypeList():
+        actual_url = self.REQUEST.get("ACTUAL_URL", "").strip()
+        if actual_url and actual_url.endswith("/") \
+            and actual_url[:-1] == document.absolute_url() \
+            and self.REQUEST.get("method") == "GET":
+          query_string = self.REQUEST.get("QUERY_STRING", "")
+          query_str = "?%s" % query_string if query_string else query_string
+          self.REQUEST.RESPONSE.redirect(
+            "".join([actual_url[:-1], query_str]),
+            status=301
+          )
+
       return document
 
     security.declarePrivate( 'manage_beforeDelete' )