Javascript 如何等待AWS假定角色，然后进行模块定义

我正在尝试创建一个模块来导出一些函数和变量，但在它可以执行任何操作之前，它必须切换用户角色。这是我试过的代码。我希望匿名异步函数首先发生，之后的所有操作都将等待完成，否则其他请求将没有完成的权限

现在，我收到一个拒绝访问错误，因为在assumeRole完成之前调用了listQueues

const AWS = require('aws-sdk');

AWS.config.update({region: 'eu-west-1'});
var sts = new AWS.STS();
var sqs;

(async () => {
  let role_promise = await sts.assumeRole({
    RoleArn: 'arn:aws:iam::xxxx:role/UserRole',
    RoleSessionName: 'NodeDeveloperRoleSession'
  }).promise().then(data => {
    console.log('Assumed role success :)');
    AWS.config.update({
      accessKeyId: data.Credentials.AccessKeyId,
      secretAccessKey: data.Credentials.SecretAccessKey,
      sessionToken: data.Credentials.SessionToken
    });
    sqs = new AWS.SQS({apiVersion: '2012-11-05'});
  }).catch(err => {
    console.log('Cannot assume role :(');
    console.log(err, err.stack);
  })
})();

async function list_queues() {
  let result = await sqs.listQueues({}).promise();
  return result.QueueUrls;
}

const result = list_queues();
exports.queues;

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感谢您的帮助

在担任该角色并使用该凭据访问其他资源时，您会犯一些错误

const AWS = require('aws-sdk');

AWS.config.update({region: 'eu-west-1'});
var sts = new AWS.STS();
var sqs;

(async () => {
  let role_promise = await sts.assumeRole({
    RoleArn: 'arn:aws:iam::xxxx:role/UserRole',
    RoleSessionName: 'NodeDeveloperRoleSession'
  }).promise().then(data => {
    console.log('Assumed role success :)');

    /* here you are making AWS globally to use your assume role, 
       this will make subsequent call error prone, may or may not work
       depending on how you are making call 
   */

    AWS.config.update({
      accessKeyId: data.Credentials.AccessKeyId,
      secretAccessKey: data.Credentials.SecretAccessKey,
      sessionToken: data.Credentials.SessionToken
    });

    sqs = new AWS.SQS({apiVersion: '2012-11-05'});

  }).catch(err => {
    console.log('Cannot assume role :(');
    console.log(err, err.stack);
  })
})();

async function list_queues() {
  let result = await sqs.listQueues({}).promise();
  return result.QueueUrls;
}

const result = list_queues();
exports.queues;

我认为这是一种更好的方式来承担角色并使用您想要的任何资源：

const AWS = require('aws-sdk');

AWS.config.update({region: 'eu-west-1'});
var sts = new AWS.STS();
var sqs;

(async () => {
  let role_promise = await sts.assumeRole({
    RoleArn: 'arn:aws:iam::xxxx:role/UserRole',
    RoleSessionName: 'NodeDeveloperRoleSession'
  }).promise().then(data => {
    console.log('Assumed role success :)');

    /* 
      It will use your AWS assume role credential and will not set it globally,
      Which means you can access resources of multiple account in same function 
      likewise.
   */
    var creds = new AWS.Credentials({
        accessKeyId: data.Credentials.AccessKeyId,
        secretAccessKey: data.Credentials.SecretAccessKey,
        sessionToken: data.Credentials.SessionToken
    });

    /* now use creds to create object of the resources that you want to access from 
       that account */
   // Also, in this case using endpoint is advisable
   // I have set it to us-east-2, you can use any endpoint where your service is
    sqs = new AWS.SQS({apiVersion: '2012-11-05', credentials:  creds, endpoint: 'sqs.us-east-2.amazonaws.com'});

  }).catch(err => {
    console.log('Cannot assume role :(');
    console.log(err, err.stack);
  })
})();

async function list_queues() {
  let result = await sqs.listQueues({}).promise();
  return result.QueueUrls;
}

const result = list_queues();
exports.queues;

阅读下面的文档了解更多用例

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这是一个典型的js asycn定时问题。你调用一个IIFE，它是你的async=>{…}；首先，调用堆栈中的列表队列将首先出现，因为sts.assumeRole。。。调用是异步的。另一件事是，既然您已经使用了async/await，那么就不必使用。然后，直接使用await可以避免neste回调

正确的方法：

const AWS=需要“AWS-sdk”； AWS.config.update{region:'eu-west-1'}； 常数sts=新的AWS.sts； 让排队； 异步=>{ 试一试{ 常量数据=等待sts.assumeRole{ RoleArn:'arn:aws:iam:：xxxx:role/UserRole'， RoleSessionName:“NodeDeveloperRoleSession” }.承诺； 日志“假定角色成功：”； AWS.config.update{//或者您可以使用此凭据初始化SQS accessKeyId:data.Credentials.accessKeyId， secretAccessKey:data.Credentials.secretAccessKey， sessionToken:data.Credentials.sessionToken }; const sqs=新AWS.sqs{apiVersion:'2012-11-05'}； const result=wait sqs.listQueues{}.promise； queues=result.queueurl； }犯错误{ console.log“不能承担角色：”； console.logerr，err.stack； } }; 导出=队列；

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错误是什么？