all: Redirect to slash

pkg/account/server.go

@@ -94,7 +94,7 @@ func (s *server) RegisterRoutes(server *web.Server) {
 		csrf.FieldName("_csrf"),
 		csrf.Path("/"),
 	)
-	router := server.Router().NewRoute().PathPrefix(s.config.Mount).Subrouter()
+	router := server.PrefixWithRedirect(s.config.Mount).Subrouter()
 	router.Use(
 		func(next http.Handler) http.Handler {
 			return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {

pkg/console/console.go

@@ -130,7 +130,7 @@ func generateConsoleCSPString(config *Config, nonce string) string {
 
 // RegisterRoutes implements web.Registerer. It registers the Console to the web server.
 func (console *Console) RegisterRoutes(server *web.Server) {
-	router := server.Router().NewRoute().PathPrefix(console.config.Mount).Subrouter()
+	router := server.PrefixWithRedirect(console.config.Mount).Subrouter()
 	router.Use(
 		mux.MiddlewareFunc(func(next http.Handler) http.Handler {
 			return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {

pkg/oauth/server.go

@@ -246,7 +246,7 @@ func (s *server) output(w http.ResponseWriter, r *http.Request, resp *osin.Respo
 }
 
 func (s *server) RegisterRoutes(server *web.Server) {
-	router := server.Router().NewRoute().PathPrefix(s.config.Mount).Subrouter()
+	router := server.PrefixWithRedirect(s.config.Mount).Subrouter()
 	router.Use(
 		func(next http.Handler) http.Handler {
 			return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {

pkg/web/redirect.go

@@ -25,9 +25,7 @@ type redirector struct {
 }
 
 func (red redirector) RegisterRoutes(s *Server) {
-	s.RootRouter().Path(red.Path).HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		http.Redirect(w, r, red.Location, red.Code)
-	})
+	s.RootRouter().Path(red.Path).Handler(http.RedirectHandler(red.Location, red.Code))
 }
 
 // Redirect returns a Registerer that redirects requests to the given path to

pkg/web/web.go

@@ -345,3 +345,16 @@ func (s *Server) Static(prefix string, fs http.FileSystem) {
 func (s *Server) Prefix(prefix string) *mux.Route {
 	return s.getRouter(prefix).PathPrefix(prefix)
 }
+
+// PrefixWithRedirect will create a route ending in slash.
+// Paths which coincide with the route, but do not end with slash, will be
+// redirect to the slash ending route.
+func (s *Server) PrefixWithRedirect(prefix string) *mux.Route {
+	prefix = "/" + strings.Trim(prefix, "/")
+	prefixWithSlash := prefix
+	if prefix != "/" {
+		prefixWithSlash = prefix + "/"
+		s.getRouter(prefix).Path(prefix).Handler(http.RedirectHandler(prefixWithSlash, http.StatusPermanentRedirect))
+	}
+	return s.getRouter(prefixWithSlash).PathPrefix(prefixWithSlash)
+}