NestJS GraphQL 订阅不适用于 `graphql-ws`

NestJS GraphQL subscriptions not working with `graphql-ws`

我正在尝试升级我们的 NestJS GraphQL 订阅服务器以利用 graphql-ws 而不是当前的 subscriptions-transport-ws(如 NestJS documentation 所建议)。 我将 NestJS 版本升级到

    "@nestjs/core": "^8.0.6",
    "@nestjs/graphql": "^9.0.4",
    "@nestjs/platform-express": "^8.0.6",
    "graphql": "^15.5.3",
    "graphql-tools": "^8.2.0",
    "apollo-server-express": "^3.3.0",

之后,我将 subscriptions 选项添加到 App.Module:

    GraphQLModule.forRoot({
      autoSchemaFile: true,
      sortSchema: true,
      playground: true,
      installSubscriptionHandlers: true,
      subscriptions: {
        'graphql-ws': true
      },
    }),

然而,当我(在操场上)订阅以前有效的订阅时,我得到:

{
  "error": "Could not connect to websocket endpoint ws://localhost:8880/graphql. Please check if the endpoint url is correct."
}

在控制台中我得到:

WebSocket protocol error occured. It was most likely caused due to an unsupported subprotocol "graphql-ws" requested by the client. graphql-ws implements exclusively the "graphql-transport-ws" subprotocol, please make sure that the client implements it too.

我尝试过的事情:

但是 none 起作用了。很抱歉 post。我该如何解决这个问题?

在 Apollo Server 3 发布时,GraphQL Playground 或 Apollo Explorer 尚不支持 graphql-ws 库中使用的协议。

here

只有在通过 playground 与订阅交互对您没有多大用处时,才建议使用 graphql-ws,并且您可以仅从您自己的已设置为使用 graphql-ws 的客户端与订阅交互。

设置您的客户端以将 graphql-ws 与 Apollo 一起使用。参见 here

这将完成工作:

subscriptions: {
    'graphql-ws': true,
    'subscriptions-transport-ws': true,
  },

doc所述:

HINT

You can also use both packages (subscriptions-transport-ws and graphql-ws) at > the same time, for example, for backward compatibility.