cloudformation.yaml

---
AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Serverless Express Application/API powered by API Gateway and Lambda
Resources:
  ApiGatewayApi:
    Type: AWS::Serverless::Api
    Properties:
      DefinitionUri: ./simple-proxy-api.yaml
      StageName: prod
      Variables:
        ServerlessExpressLambdaFunctionName: !Ref YOUR_SERVERLESS_EXPRESS_LAMBDA_FUNCTION_NAME

  LambdaExecutionRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
          Effect: Allow
          Principal:
            Service: lambda.amazonaws.com
          Action: sts:AssumeRole
      Path: '/'
      Policies:
        - PolicyName: root
          PolicyDocument:
            Version: '2012-10-17'
            Statement:
              - Effect: Allow
                Action:
                  - logs:CreateLogGroup
                  - logs:CreateLogStream
                  - logs:PutLogEvents
                Resource: arn:aws:logs:*:*:*

  LambdaApiGatewayExecutionPermission:
    Type: AWS::Lambda::Permission
    Properties:
      Action: lambda:InvokeFunction
      FunctionName: !GetAtt YOUR_SERVERLESS_EXPRESS_LAMBDA_FUNCTION_NAME.Arn
      Principal: apigateway.amazonaws.com
      SourceArn: !Join
        - ''
        - - 'arn:aws:execute-api:'
          - !Ref AWS::Region
          - ':'
          - !Ref AWS::AccountId
          - ':'
          - !Ref ApiGatewayApi
          - '/*/*'

  YOUR_SERVERLESS_EXPRESS_LAMBDA_FUNCTION_NAME:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: ./
      Handler: lambda.handler
      MemorySize: 1024
      Role: !GetAtt LambdaExecutionRole.Arn
      Runtime: nodejs12.x
      Timeout: 30
      Events:
        ProxyApiRoot:
          Type: Api
          Properties:
            RestApiId: !Ref ApiGatewayApi
            Path: /
            Method: ANY
        ProxyApiGreedy:
          Type: Api
          Properties:
            RestApiId: !Ref ApiGatewayApi
            Path: /{proxy+}
            Method: ANY

Outputs:
  LambdaFunctionConsoleUrl:
    Description: Console URL for the Lambda Function.
    Value: !Join
      - ''
      - - https://
        - !Ref AWS::Region
        - '.console.aws.amazon.com/lambda/home?region='
        - !Ref AWS::Region
        - '#/functions/'
        - !Ref YOUR_SERVERLESS_EXPRESS_LAMBDA_FUNCTION_NAME

  ApiGatewayApiConsoleUrl:
    Description: Console URL for the API Gateway API's Stage.
    Value: !Join
      - ''
      - - https://
        - !Ref AWS::Region
        - '.console.aws.amazon.com/apigateway/home?region='
        - !Ref AWS::Region
        - '#/apis/'
        - !Ref ApiGatewayApi
        - '/stages/prod'

  ApiUrl:
    Description:
      Invoke URL for your API. Clicking this link will perform a GET request
      on the root resource of your API.
    Value: !Join
      - ''
      - - https://
        - !Ref ApiGatewayApi
        - '.execute-api.'
        - !Ref AWS::Region
        - '.amazonaws.com/prod/'