Amazon API Gateway REST API with Mapping templates for status code and parameter mapping.

Using mapping template to over-ride status, status code and body returned from the Lambda function.

This sample project demonstrates how to map status codes and over-ride parameters in a REST API - Lambda integration.

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: An example API using Mapping templates in Integration response along with Lambda function (uksb-1tthgi812) (tag:apigw-mappingtemplate-lambda)

Resources:
  RestApi:
    Type: AWS::Serverless::Api
    Properties:
      StageName: dev
      DefinitionBody: # an OpenApi definition
        'Fn::Transform':
          Name: 'AWS::Include'
          Parameters:
            Location: './api.yaml'
      OpenApiVersion: 3.0.3
      EndpointConfiguration:
          Type: REGIONAL

  # Lambda function
  APIFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: src/
      Handler: lambda_function4.lambda_handler
      Runtime: python3.9
      Events:
        ApiEvent:
          Type: Api
          Properties:
            RestApiId: !Ref RestApi
            Path: /
            Method: any


Outputs:
  API:
    Description: Invoke URL to test mapping template
    Value: !Sub "https://${RestApi}.execute-api.${AWS::Region}.amazonaws.com/dev"