re-frame-http-fx usage

example.cljs

(reg-event-fx
  :http-request
  (fn [{:keys [db]} [_ {:keys [method uri on-success on-failure params]}]]
    {:db         db
     :http-xhrio {:method          method
                  :uri             uri
                  :params          params
                  :on-success      on-success
                  :on-failure      on-failure
                  :headers         {"X-CSRF-Token" csrf-token}
                  :format          (ajax/json-request-format)
                  :response-format (ajax/json-response-format {:keywords? true})}}))