如何使用Lacinia底座设置CORs？

Question

我正在使用Clojure设置一个lacinia-pedestal graphql服务器，并尝试使用apollo通过客户端javascript代码访问它。但是，我无法访问localhost上的/graphql端点，因为我试图从CORs不允许的localhost源(localhost:3000)访问它。如何使用lacinia-pedestal设置CORs？

以下是服务器端代码(使用lacinia tutorial https://lacinia.readthedocs.io/en/latest/tutorial/component.html设置)

(ns project.server
  (:require [com.stuartsierra.component :as component]
            [com.walmartlabs.lacinia.pedestal :as lp]
            [io.pedestal.http :as http]))

(defrecord Server [schema-provider server]

  component/Lifecycle

  (start [this]
    (assoc this :server (-> schema-provider
                            :schema
                            (lp/service-map {:graphiql true})
                            http/create-server
                            http/start)))

  (stop [this]
    (http/stop server)
    (assoc this :server nil)))

(defn new-server
  []
  {:server (-> {}
               map->Server
               (component/using [:schema-provider]))})

客户端代码非常简单(使用Apollo)：

const client = new ApolloClient({
  uri: "http://localhost:8888/graphql"
});

Answer 1

更新:通过将我的lacinia底座服务地图与标准底座服务地图合并，我设法解决了这个问题。

 (start [this]
    (assoc this :server (-> schema-provider
                            :schema
                            (lp/service-map {:graphiql true})
                            (merge {::http/allowed-origins (constantly true)})
                            http/create-server
                            http/start)))