Edge routing function

buildspec.yml

@@ -12,6 +12,9 @@ phases:
  - echo "[profile account-role]\nrole_arn = ${ACCOUNT_ROLE}\ncredential_source = EcsContainer" >> ~/.aws/config
  build:
  commands:
+ - sam build -t edge.yaml
+ - sam deploy --config-env $ENV --s3-bucket $LAMBDA_BUCKET_NAME --s3-prefix $ENV-$STACK_NAME --stack-name $STACK_NAME-edge --capabilities CAPABILITY_IAM --profile account-role --region us-east-1 -t edge.yaml
+
  - (cd api; npm install)
  - (cd api; npm run build)
  - sam build

edge.yaml

@@ -0,0 +1,38 @@
+AWSTemplateFormatVersion: '2010-09-09'
+Transform: AWS::Serverless-2016-10-31
+Description: Edge Lambda
+Resources:
+ EdgeFunction:
+ Type: AWS::Serverless::Function
+ Properties:
+ Architectures:
+ - x86_64
+ Timeout: 5
+ CodeUri: serve/
+ Runtime: nodejs18.x
+ Handler: index.handler
+ AutoPublishAlias: edge
+ AssumeRolePolicyDocument:
+ Version: 2012-10-17
+ Statement:
+ - Effect: Allow
+ Principal:
+ Service:
+ - lambda.amazonaws.com
+ - edgelambda.amazonaws.com
+ Action:
+ - sts:AssumeRole
+ Metadata:
+ BuildMethod: esbuild
+ BuildProperties:
+ EntryPoints:
+ - index.ts
+ Minify: true
+ Sourcemap: true
+ Target: "es2020"
+Outputs:
+ EdgeLambdaVersion:
+ Description: ARN Of the Lambda at the latest version
+ Value: !Ref EdgeFunction.Version
+ Export:
+ Name: !Sub "${AWS::StackName}-EdgeLambdaVersion"

serve/index.ts

@@ -0,0 +1,11 @@
+import { CloudFrontRequestHandler } from "aws-lambda";
+
+const hasExtension = /^\/.*\..+$/;
+
+export const handler: CloudFrontRequestHandler = async (event) => {
+ const { request } = event.Records[0].cf;
+ if (!request.uri.match(hasExtension)) {
+ request.uri = `${request.uri}.html`;
+ }
+ return request
+};

serve/package.json

@@ -0,0 +1,14 @@
+{
+ "name": "serve",
+ "version": "1.0.0",
+ "description": "",
+ "main": "index.js",
+ "scripts": {
+ "test": "echo \"Error: no test specified\" && exit 1"
+ },
+ "author": "",
+ "devDependencies": {
+ "@types/aws-lambda": "^8.10.119",
+ "typescript": "^5.2.2"
+ }
+}

serve/tsconfig.json

@@ -0,0 +1,10 @@
+{
+ "compilerOptions": {
+ "target": "ES2020",
+ "module": "ES2022",
+ "esModuleInterop": true,
+ "forceConsistentCasingInFileNames": true,
+ "strict": true,
+ "skipLibCheck": true,
+ }
+}

template.yaml

@@ -58,6 +58,9 @@ Parameters:
  SubnetIds:
  Type: List<AWS::EC2::Subnet::Id>
  Description: VPC subnets
+ EdgeStackName:
+ Type: String
+ Description: Name of the edge stack containing the routing lambda in us-east-1
 Conditions:
  CreateARecords: !Not [ !Equals [ !Ref HostedZoneName, "" ] ]
  IsDev: !Equals [ !Ref Environment, "dev" ]
@@ -158,6 +161,10 @@ Resources:
  ViewerProtocolPolicy: redirect-to-https
  ForwardedValues:
  QueryString: True
+ LambdaFunctionAssociations:
+ - EventType: viewer-request
+ LambdaFunctionARN:
+ Fn::ImportValue: !Sub "EdgeStackName-EdgeLambdaVersion"
  PriceClass: PriceClass_All
  Logging:
  IncludeCookies: false
@@ -244,6 +251,34 @@ Resources:
  Sourcemap: true
  EntryPoints:
  - src/api/apiHandler.ts
+ ServeFunction:
+ Type: AWS::Serverless::Function
+ Properties:
+ Architectures:
+ - x86_64
+ Timeout: 5
+ CodeUri: serve/
+ Runtime: nodejs18.x
+ Handler: index.handler
+ AutoPublishAlias: edge
+ AssumeRolePolicyDocument:
+ Version: 2012-10-17
+ Statement:
+ - Effect: Allow
+ Principal:
+ Service:
+ - lambda.amazonaws.com
+ - edgelambda.amazonaws.com
+ Action:
+ - sts:AssumeRole
+ Metadata:
+ BuildMethod: esbuild
+ BuildProperties:
+ EntryPoints:
+ - index.ts
+ Minify: true
+ Sourcemap: true
+ Target: "es2020"
  TranscriptionJobStartFunction:
  Type: AWS::Serverless::Function
  Properties: