AWS Cognito/Amplify - 将新用户注册自动添加到用户组

Question

我正在使用AWS Amplify库为AppSync项目注册并执行Auth.这使用Cognito.但是,当新用户通过Amplify/Cognito注册时,新用户不会分配到cognito池中的任何特定组.我使用Amplify高阶组件进行登录/注册.

import { withAuthenticator } from 'aws-amplify-react';

我将一个组件包裹起来

class Authenticator extends React.Component {
   //... basically empty component, only exists so I can wrap it w/ the HOC
}
export default withAuthenticator(Authenticator)

Amplify在index.js中设置

import config from './aws-exports';
import Amplify from 'aws-amplify';
Amplify.configure(config);

aws-exports.js由AWS Mobile Hub CLI自动生成.好像...

const awsmobile = {
    'aws_app_analytics': 'enable',
    'aws_cognito_identity_pool_id': 'us-west-2:XXX',
    'aws_cognito_region': 'us-west-2',
    'aws_content_delivery': 'enable',
    'aws_content_delivery_bucket': 'flashcards-hosting-mobilehub-XXX',
    'aws_content_delivery_bucket_region': 'us-west-2',
    'aws_content_delivery_cloudfront': 'enable',
    'aws_content_delivery_cloudfront_domain': 'XXX.cloudfront.net',
    'aws_mandatory_sign_in': 'enable',
    'aws_mobile_analytics_app_id': 'XXX',
    'aws_mobile_analytics_app_region': 'us-east-1',
    'aws_project_id': 'XXX',
    'aws_project_name': 'flash-cards',
    'aws_project_region': 'us-west-2',
    'aws_resource_name_prefix': 'flashcards-mobilehub-XXX',
    'aws_sign_in_enabled': 'enable',
    'aws_user_pools': 'enable',
    'aws_user_pools_id': 'us-west-2_XXX',
    'aws_user_pools_mfa_type': 'OFF',
    'aws_user_pools_web_client_id': 'XXX',
}
export default awsmobile;

Answer 1

我搞定了.正如Vladamir在评论中所提到的,这需要在服务器端完成,在Post Confirmation lambda触发器中.这是lambda函数.

'use strict';
var AWS = require('aws-sdk');
module.exports.addUserToGroup = (event, context, callback) => {
  // console.log("howdy!",event);
  var cognitoidentityserviceprovider = new AWS.CognitoIdentityServiceProvider();
  var params = {
    GroupName: 'users', //The name of the group in you cognito user pool that you want to add the user to
    UserPoolId: event.userPoolId, 
    Username: event.userName 
  };
  //some minimal checks to make sure the user was properly confirmed
  if(! (event.request.userAttributes["cognito:user_status"]==="CONFIRMED" && event.request.userAttributes.email_verified==="true") )
    callback("User was not properly confirmed and/or email not verified")
  cognitoidentityserviceprovider.adminAddUserToGroup(params, function(err, data) {
    if (err) {
      callback(err) // an error occurred
    }
    callback(null, event);           // successful response
  });  
};

您还必须为lambda函数角色设置策略.在IAM控制台中,找到此lambda的角色并添加此内联策略.这为lambda提供了知识产权所需的一切,所以让你的限制更多.

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "cognito-identity:*"
            ],
            "Resource": "*"
        },
        {
            "Effect": "Allow",
            "Action": [
                "cognito-sync:*"
            ],
            "Resource": "*"
        },
        { //this might be the only one you really need
            "Effect": "Allow",
            "Action": [
                "cognito-idp:*"
            ],
            "Resource": "*"
        }
    ]
}

Answer 2

Cognito不会知道新注册用户需要加入哪个组.您必须以编程方式(或手动)将用户分配给特定组.一旦您的代码将用户置于特定组中,JWT ID令牌将包含此用户所属的所有相关组/ IAM角色的列表.

对群体更多信息在这里.

Answer 3

AWS Amplify 添加了对使用 amplify cli 将用户添加到组的支持。此处提供详细信息 https://aws.amazon.com/blogs/mobile/amplify-framework-adds-supports-for-aws-lambda-triggers-in-auth-and-storage-categories/

本文还解释了更多细节 https://medium.com/@dantasfiles/multi-tenant-aws-amplify-method-2-cognito-groups-38b40ace2e9e

将组名称从客户端传递给您的 lamda 函数，您可以使用确认后 Lambda 触发器参数 clientMetadata 对象，如下所示。

  await Auth.signUp({
          username: this.email,
          password: this.password,
          attributes: {
            given_name: this.firstname,
            family_name: this.lastname
          },
          clientMetadata: {
            key: value
          }
        })

如果您使用现成的 amplify auth UI，那么您需要自定义 withAuthenticator 组件并编写您自己的组件用于注册或首选ConfirmSignUp（请检查是否可以从那里传递 clientMetadata）

在 lamda 函数中，您可以像这样传递组名称

event.request.clientMetadata.groupName