Handler

Handler.ts

import { Stack, StackProps} from 'aws-cdk-lib';
import { Construct } from 'constructs';
import * as lambda from 'aws-cdk-lib/aws-lambda-nodejs'
import * as apigateway from 'aws-cdk-lib/aws-apigateway'
import { LambdaIntegration } from './LambdaIntegration'

export class LegacyWrapperStack extends Stack {
  constructor(scope: Construct, id: string, props?: StackProps) {
    super(scope, id, props);

    const handler = new lambda.NodejsFunction(this, "RoutesHandler", {
      entry: './src/handler.ts',
      handler: "handler"
    });

    const apiResourcePolicy = new iam.PolicyDocument({
      statements: [
        new iam.PolicyStatement({
          actions: ['execute-api:Invoke'],
          principals: [new AnyPrincipal()],
          resources: ['execute-api:/*/*/*'],
        })
      ]
    })

    const api = new apigateway.RestApi(this, "legacy-wrapper-api", {
      restApiName: "My Api",
      policy: apiResourcePolicy
    });

    const lambdaIntegration = new LambdaIntegration(handler, {
      restApi: api,
      requestTemplates: {"application/json": '{ "statusCode": "200" }'}
    });
    
    // add routes to API Gateway
    // many, many routes ...    
  }
}