@aws-solutions-constructs/aws-cloudfront-apigateway-lambda

aws-cloudfront-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 This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.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_cloudfront_apigateway_lambda
Typescript	@aws-solutions-constructs/aws-cloudfront-apigateway-lambda
Java	software.amazon.awsconstructs.services.cloudfrontapigatewaylambda

This AWS Solutions Construct implements an AWS CloudFront fronting an Amazon API Gateway Lambda backed REST API.

Here is a minimal deployable pattern definition:

import * as defaults from '@aws-solutions-constructs/core';
import { CloudFrontToApiGatewayToLambda } from '@aws-solutions-constructs/aws-cloudfront-apigateway-lambda';

const stack = new Stack();

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

new CloudFrontToApiGatewayToLambda(stack, 'test-cloudfront-apigateway-lambda', {
    lambdaFunctionProps: lambdaProps,
    deployLambda: true
});

Initializer

new CloudFrontToApiGatewayToLambda(scope: Construct, id: string, props: CloudFrontToApiGatewayToLambdaProps);

Parameters

• scope Construct
• id string
• props CloudFrontToApiGatewayToLambdaProps

Pattern Construct Props

Name	Type	Description
deployLambda	boolean	Whether to create a new Lambda function or use an existing Lambda function
existingLambdaObj?	lambda.Function	Existing instance of Lambda Function object
lambdaFunctionProps?	lambda.FunctionProps	Optional user provided props to override the default props for Lambda function
apiGatewayProps?	api.LambdaRestApiProps	Optional user provided props to override the default props for API Gateway
cloudFrontDistributionProps?	cloudfront.CloudFrontWebDistributionProps	Optional user provided props to override the default props for CloudFront Distribution
insertHttpSecurityHeaders?	boolean	Optional user provided props to turn on/off the automatic injection of best practice HTTP security headers in all responses from CloudFront

Pattern Properties

Name	Type	Description
cloudFrontWebDistribution	cloudfront.CloudFrontWebDistribution	Returns an instance of cloudfront.CloudFrontWebDistribution created by the construct
lambdaFunction	lambda.Function	Returns an instance of the Lambda function created by the pattern.
apiGateway	api.RestApi	Returns an instance of the API Gateway REST API created by the pattern.

Default settings

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

Amazon CloudFront

• Configure Access logging for CloudFront WebDistribution
• Enable automatic injection of best practice HTTP security headers in all responses from CloudFront WebDistribution

Amazon API Gateway

• Deploy a regional 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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