如何在 GraphQL/AWS Amplify 的前端启用 CORS 模式？

Question

如何对 AWS Amplify 的 GraphQL 做同样的事情？

fetch('https://trusted-api.co.jp', {
  mode: 'cors'
});

我既没有找到如何操作的文档，也没有找到提到 cors 的源代码。

参考

可以如下调用常规的 graphQL 操作：

import AWSAmplifyAPI, { graphqlOperation as graphQL_Operation, GraphQLResult } from "@aws-amplify/api";
import Observable from "zen-observable";

export default class DataBaseService {

  public static async sendRequestAndExtractDataFromResponse(
      graphQL_RawRequest: string,
      requestVariables?: object
  ): Promise<unknown> {

    const serverRawResponse: GraphQLResult | Observable<unknown> =
        await AWSAmplifyAPI.graphql(graphQL_Operation(graphQL_RawRequest, requestVariables));
   // ...
  }
}

Answer 1

你需要在服务器端配置这个，所以这个“CORS”问题需要服务器端认可。

从技术上讲，您的放大 lambda 函数会添加类似于以下的代码：

exports.handler = async (event) => {
  const response = {
    statusCode: 200,
    //  Uncomment below to enable CORS requests
    headers: {
      "Access-Control-Allow-Origin": "*",
    },

    //   headers: {
    //     "Access-Control-Allow-Headers" : "Content-Type",
    //     "Access-Control-Allow-Origin": "https://www.example.com",
    //     "Access-Control-Allow-Methods": "OPTIONS,POST,GET"
    // },
    body: JSON.stringify("Hello from Lambda!"),
  };
  return response;
};

如何在 GraphQL/AWS Amplify 的前端启用 CORS 模式？

How to enable the CORS mode on frontend side in GraphQL/AWS Amplify?

javascript

graphql

aws-amplify

参考