无法克服 Java AWS Lambda Cognito 自定义消息触发器的 InvalidLambdaResponseException

Question

每当我在 cognito 中创建新帐户时尝试使用自定义消息触发器时，我都会不断收到带有消息“无法识别的 lambda 输出”的 InvalidLambdaResponseException。 lambda 触发器是用 java 编写的，我在查找文档或如何在 java 中编写 cognito 触发器的示例时遇到了麻烦。我能找到的最好的是here，它使我能够弄清楚如何正确格式化输出消息，但仍然抛出异常。我通过查看 JavaScript 示例了解到，您必须返回接收到的事件或具有相同参数格式的对象，我试图这样做无济于事。您将在下面找到我收到的云手表记录的输入和输出。我做错了什么？

这是原始输入

{version=1, region=us-east-1, userPoolId=*****,
userName= *****, callerContext={awsSdkVersion=aws-sdk-nodejs-2.166.0, 
clientId=*****}, triggerSource=CustomMessage_SignUp,
request={userAttributes={custom:position_group=["All"],
sub=*****, email_verified=false, cognito:user_status=UNCONFIRMED, 
given_name=*****, custom:permissions=, custom:team_id=*****,
email=*****@gmail.com}, codeParameter={####},usernameParameter=null}, 
response={smsMessage=null, emailMessage=null, emailSubject=null}}

这是输出

{
    "version": 1,
    "triggerSource": "CustomMessage_SignUp",
    "region": "us-east-1",
    "userPoolId": "*****",
    "userName": "*****",
    "callerContext": {
        "awsSdkVersion": "aws-sdk-nodejs-2.166.0",
        "clientId": "*****"
    },
    "request": {
        "userAttributes": {
            "userAttributes": {
                "custom:position_group": "[\"All\"]",
                "sub": "*****",
                "email_verified": "false",
                "cognito:user_status": "UNCONFIRMED",
                "given_name": "*****",
                "custom:permissions": "",
                "custom:team_id": "*****",
                "email": "*****@gmail.com"
            },
            "codeParameter": "{####}"
        }
    },
    "response": {
        "smsMessage": "{####} is your verification code.",
        "emailMessage": "TEST {####}",
        "emailSubject": "Verification"
        } 
}

加法 在阅读了这个post 之后，我尝试将我的处理程序方法切换到这个

public void handleRequest(InputStream input, OutputStream output, Context context) throws IOException {
        LambdaLogger logger = context.getLogger();
        JsonNode json = mapper.readTree(input);
        logger.log(mapper.writeValueAsString(json));
        ObjectNode jsonWithResponse = (ObjectNode) json;
        jsonWithResponse.with("response").put("smsMessage", "TEST {####}");
        jsonWithResponse.with("response").put("emailMessage", "TEST {####}");
        jsonWithResponse.with("response").put("emailSubject", "TEST subject");
        try (Writer w = new OutputStreamWriter(output, "UTF-8")) {
                w.write(mapper.writeValueAsString(jsonWithResponse));
        }
        logger.log(mapper.writeValueAsString(jsonWithResponse));
    }

之前把这个放在云端观看

{
    "version": "1",
    "region": "us-east-1",
    "userPoolId": "*****",
    "userName": "*****",
    "callerContext": {
        "awsSdkVersion": "aws-sdk-nodejs-2.166.0",
        "clientId": "*****"
    },
    "triggerSource": "CustomMessage_SignUp",
    "request": {
        "userAttributes": {
            "custom:position_group": "[\"All\"]",
            "sub": "*****",
            "email_verified": "false",
            "cognito:user_status": "UNCONFIRMED",
            "given_name": "*****",
            "custom:permissions": "",
            "custom:team_id": "*****",
            "email": "*****@gmail.com"
        },
        "codeParameter": "{####}",
        "usernameParameter": null
    },
    "response": {
        "smsMessage": null,
        "emailMessage": null,
        "emailSubject": null
    }
}

然后在云端观看

{
    "version": "1",
    "region": "us-east-1",
    "userPoolId": "*****",
    "userName": "*****",
    "callerContext": {
        "awsSdkVersion": "aws-sdk-nodejs-2.166.0",
        "clientId": "*****"
    },
    "triggerSource": "CustomMessage_SignUp",
    "request": {
        "userAttributes": {
            "custom:position_group": "[\"All\"]",
            "sub": "*****",
            "email_verified": "false",
            "cognito:user_status": "UNCONFIRMED",
            "given_name": "*****",
            "custom:permissions": "",
            "custom:team_id": "*****",
            "email": "*****@gmail.com"
        },
        "codeParameter": "{####}",
        "usernameParameter": null
    },
    "response": {
        "smsMessage": "TEST  {####}",
        "emailMessage": "TEST {####}",
        "emailSubject": "TEST subject"
    }
}

Answer 1

我的问题是由于我没有将{username} 键添加到我的电子邮件回复消息（smsMessage 和 emailMessage）中。确保添加密钥{####} 和{username} 解决了它。