aws cognito redirect after user confirmation - amazon-web-services

Question

i have followed all the solution and answer from this stack overflow question
How to redirect after confirm amazon cognito using confirmation URL?
but I am getting this error
{"errorType":"TypeError","errorMessage":"Cannot read property 'code' of undefined","trace":["TypeError: Cannot read property 'code' of undefined"," at Runtime.module.exports.handler (/var/task/index.js:10:54)"," at Runtime.handleOnce (/var/runtime/Runtime.js:66:25)"]}
code of customize message lambda is:
exports.handler = (event, context, callback) => {
// Identify why was this function invoked
if(event.triggerSource === "CustomMessage_SignUp") {
console.log('function triggered');
console.log(event);
// Ensure that your message contains event.request.codeParameter. This is the placeholder for code that will be sent
const { codeParameter } = event.request
const { userName, region } = event
const { clientId } = event.callerContext
const { email } = event.request.userAttributes
const url = 'https://xxxxxxxxx.execute-api.ap-southeast-1.amazonaws.com/confirm'
const link = `here`
event.response.emailSubject = "Your verification link"; // event.request.codeParameter
event.response.emailMessage = `Thank you for signing up. Click ${link} to verify your email.`;
}
// Return to Amazon Cognito
callback(null, event);
};
code for redirect lambda is
'use strict';
var AWS = require('aws-sdk');
AWS.config.setPromisesDependency(require('bluebird'));
var CognitoIdentityServiceProvider = new AWS.CognitoIdentityServiceProvider({ apiVersion: '2016-04-19', region: process.env.REGION });
module.exports.handler = (req, context, callback) => {
console.log('req');
console.log(req);
const confirmationCode = req.queryStringParameters.code
const username = req.queryStringParameters.username
const clientId = req.queryStringParameters.clientId
const region = req.queryStringParameters.region
const email = req.queryStringParameters.email
let params = {
ClientId: clientId,
ConfirmationCode: confirmationCode,
Username: username
}
var confirmSignUp = CognitoIdentityServiceProvider.confirmSignUp(params).promise()
confirmSignUp.then(
(data) => {
let redirectUrl = process.env.POST_REGISTRATION_VERIFICATION_REDIRECT_URL;
const response = {
statusCode: 301,
headers: {
Location: redirectUrl,
}
};
return callback(null, response);
}
).catch(
(error) => {
callback(error)
}
)
}
customize_message lambda is triggered by the aws cognito which send
code for verification
redirect lambda is triggered by the API gateway
please help
thank you in advance

Answer 1

sometihing wrong with access your req parameter. try to use this code
'use strict';
var AWS = require('aws-sdk');
AWS.config.setPromisesDependency(require('bluebird'));
var CognitoIdentityServiceProvider = new AWS.CognitoIdentityServiceProvider({ apiVersion: '2016-04-19', region: process.env.REGION });
module.exports.handler = (req, context, callback) => {
console.log('req');
console.log(req);
const confirmationCode = req.code;
const username = req.username;
const clientId = req.clientId;
const region = req.region;
const email = req.email;
let params = {
ClientId: clientId,
ConfirmationCode: confirmationCode,
Username: username
}
var confirmSignUp = CognitoIdentityServiceProvider.confirmSignUp(params).promise()
confirmSignUp.then(
(data) => {
let redirectUrl = process.env.POST_REGISTRATION_VERIFICATION_REDIRECT_URL;
const response = {
statusCode: 301,
headers: {
Location: redirectUrl,
}
};
return callback(null, response);
}
).catch(
(error) => {
callback(error)
}
)
}
instead of your code.
only change is instead of all this
const confirmationCode = req.queryStringParameters.code;
const username = req.queryStringParameters.username;
const clientId = req.queryStringParameters.clientId;
const region = req.queryStringParameters.region;
const email = req.queryStringParameters.email;
you need to use this
const confirmationCode = req.code;
const username = req.username;
const clientId = req.clientId;
const region = req.region;
const email = req.email;