feat(router): add ping route for health probes

pkg/handler/handler_test.go

@@ -419,6 +419,17 @@ func TestSession_WithRefresh(t *testing.T) {
 	assert.Equal(t, int64(-1), data.Session.TimeoutInSeconds)
 }
 
+func TestPing(t *testing.T) {
+	cfg := mock.Config()
+	idp := mock.NewIdentityProvider(cfg)
+	defer idp.Close()
+
+	rpClient := idp.RelyingPartyClient()
+	resp := get(t, rpClient, idp.RelyingPartyServer.URL+"/oauth2/ping")
+	assert.Equal(t, http.StatusOK, resp.StatusCode)
+	assert.Equal(t, "pong", resp.Body)
+}
+
 func localLogin(t *testing.T, rpClient *http.Client, idp *mock.IdentityProvider) response {
 	// First, run /oauth2/login to set cookies
 	loginURL, err := url.Parse(idp.RelyingPartyServer.URL + "/oauth2/login")

pkg/router/paths/paths.go

@@ -8,5 +8,6 @@ const (
 	LogoutCallback     = "/logout/callback"
 	LogoutFrontChannel = "/logout/frontchannel"
 	LogoutLocal        = "/logout/local"
+	Ping               = "/ping"
 	Session            = "/session"
 )

pkg/router/router.go

@@ -68,6 +68,10 @@ func New(src Source, cfg *config.Config) chi.Router {
 				r.Get(paths.LogoutCallback, src.LogoutCallback)
 				r.Get(paths.LogoutFrontChannel, src.LogoutFrontChannel)
 				r.Get(paths.LogoutLocal, src.LogoutLocal)
+				r.Get(paths.Ping, func(w http.ResponseWriter, r *http.Request) {
+					w.WriteHeader(http.StatusOK)
+					w.Write([]byte("pong"))
+				})
 
 				r.Route(paths.Session, func(r chi.Router) {
 					if cfg.SSO.Enabled && cfg.SSO.Mode == config.SSOModeServer {