Lambda S3 Asset + API Gateway with the AWS CDK

1import * as cdk from "@aws-cdk/core";
2import * as lambda from "@aws-cdk/aws-lambda";
3import * as assets from "@aws-cdk/aws-s3-assets";
4import * as apigw from "@aws-cdk/aws-apigateway";
5import * as path from "path";
6
7export class HelloLambdaFromS3Stack extends cdk.Stack {
8  constructor(scope: cdk.App, id: string, props?: cdk.StackProps) {
9    super(scope, id, props);
10
11    // The following JavaScript example defines an directory
12    // asset which is archived as a .zip file and uploaded to
13    // S3 during deployment.
14    // See https://docs.aws.amazon.com/cdk/api/latest/docs/aws-s3-assets-readme.html
15    const myLambdaAsset = new assets.Asset(
16      // @ts-ignore - this expects Construct not cdk.Construct :thinking:
17      this,
18      `HelloLambdaAssetsZip`,
19      {
20        path: path.join(__dirname, "../functions/hello-dynamo-zip"),
21      }
22    );
23
24    const fn = new lambda.Function(this, `HelloLambdaAssetFn`, {
25      code: lambda.Code.fromBucket(
26        // @ts-ignore
27        myLambdaAsset.bucket,
28        myLambdaAsset.s3ObjectKey
29      ),
30      timeout: cdk.Duration.seconds(300),
31      runtime: lambda.Runtime.NODEJS_12_X,
32      handler: "index.handler",
33    });
34
35    // API Gateway
36    const api = new apigw.RestApi(this, "myapi", {});
37    const helloWorldLambdaIntegration = new apigw.LambdaIntegration(fn);
38    const helloResource = api.root.addResource("hello");
39    helloResource.addMethod("GET", helloWorldLambdaIntegration);
40
41    // required for local dev
42    new cdk.CfnOutput(this, "Endpoint", {
43      value: `http://localhost:4566/restapis/${api.restApiId}/prod/_user_request_${helloResource.path}`,
44    });
45  }
46}
copy