aws-solutions-constructs.aws-cognito-apigateway-lambda 1.51.0

CDK Constructs for AWS Cognito to AWS API Gateway to AWS Lambda integration

aws-cognito-apigateway-lambda module

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All classes are under active development and subject to non-backward compatible changes or removal in any future version. These are not subject to the Semantic Versioning model. This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.

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Reference Documentation:	https://docs.aws.amazon.com/solutions/latest/constructs/

Language	Package
Python	aws_solutions_constructs.aws_cognito_apigateway_lambda
Typescript	@aws-solutions-constructs/aws-cognito-apigateway-lambda
Java	software.amazon.awsconstructs.services.cognitoapigatewaylambda

This AWS Solutions Construct implements an Amazon Cognito securing an Amazon API Gateway Lambda backed REST APIs pattern.

Here is a minimal deployable pattern definition:

const { CognitoToApiGatewayToLambda } = require('@aws-solutions-constructs/aws-cognito-apigateway-lambda');

const stack = new Stack(app, 'test-cognito-apigateway-lambda-stack');

const lambdaProps: lambda.FunctionProps = {
    code: lambda.Code.asset(`${__dirname}/lambda`),
    runtime: lambda.Runtime.NODEJS_12_X,
    handler: 'index.handler'
};

new CognitoToApiGatewayToLambda(stack, 'test-cognito-apigateway-lambda', {
    lambdaFunctionProps: lambdaProps,
});

Initializer

new CognitoToApiGatewayToLambda(scope: Construct, id: string, props: CognitoToApiGatewayToLambdaProps);

Parameters

• scope Construct
• id string
• props CognitoToApiGatewayToLambdaProps

Pattern Construct Props

Name	Type	Description
existingLambdaObj?	lambda.Function	Existing instance of Lambda Function object, if this is set then the lambdaFunctionProps is ignored.
lambdaFunctionProps?	lambda.FunctionProps	User provided props to override the default props for the Lambda function.
apiGatewayProps?	api.LambdaRestApiProps	Optional user provided props to override the default props for API Gateway
cognitoUserPoolProps?	cognito.UserPoolProps	Optional user provided props to override the default props for Cognito User Pool
cognitoUserPoolClientProps?	cognito.UserPoolClientProps	Optional user provided props to override the default props for Cognito User Pool Client

Pattern Properties

Name	Type	Description
apiGateway	api.RestApi	Returns an instance of api.RestApi created by the construct
lambdaFunction	lambda.Function	Returns an instance of lambda.Function created by the construct
userPool	cognito.UserPool	Returns an instance of cognito.UserPool created by the construct
userPoolClient	cognito.UserPoolClient	Returns an instance of cognito.UserPoolClient created by the construct

Default settings

Out of the box implementation of the Construct without any override will set the following defaults:

Amazon Cognito

• Set password policy for User Pools
• Enforce the advanced security mode for User Pools

Amazon API Gateway

• Deploy an edge-optimized API endpoint
• Enable CloudWatch logging for API Gateway
• Configure least privilege access IAM role for API Gateway
• Set the default authorizationType for all API methods to IAM

AWS Lambda Function

• Configure least privilege access IAM role for Lambda function
• Enable reusing connections with Keep-Alive for NodeJs Lambda function

Architecture

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