All code snippets need to fullfill Amazong API gateway integration with 3scale

helloWorld.js

exports.handler = function(event, context) {
  console.log('Received event:', JSON.stringify(event, null, 2));
  if(event.httpMethod === "POST" && event.body.name){
    context.succeed({"message":"Hello "+event.body.name});
  }else{
    context.succeed({"message":"Hello world."});
  }
};

helloWorld_complete.js

var aws = require('aws-sdk');
var lambda = new aws.Lambda({
    region: 'REGION'
});
console.log('Loading function');

exports.handler = function(event, context) {
  console.log('Received event:', JSON.stringify(event, null, 2));
  lambda.invoke({
    FunctionName: '3scale_auth',
    Payload: JSON.stringify(event, null, 2)
  }, function(error, data) {
    if (error) {
      console.log('error',error);
      context.done('error', error);
    }
    if(data.Payload){
      var d= JSON.parse(data.Payload)
      if(d.errorMessage){
        context.fail(d.errorMessage)
      }else{
      // Logic for endpoints should be placed HERE
      // this is an example with HelloWorld
        if(event.httpMethod === "POST" && event.body.name){
          context.succeed({"message":"Hello "+event.body.name})
        }else{
          context.succeed({"message":"Hello world."});
        }
      }
    }
  });
};

lambda_gateway_execution_inline_policy.json

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "logs:CreateLogGroup",
        "logs:CreateLogStream",
        "logs:PutLogEvents"
      ],
      "Resource": "arn:aws:logs:*:*:*"
    },
    {
      "Effect": "Allow",
      "Action": [
        "lambda:InvokeFunction"
      ],
      "Resource": [
        "*"
      ]
    }
  ]
}

lambda_gateway_execution_trust_relationship.json

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "",
      "Effect": "Allow",
      "Principal": {
        "Service": "apigateway.amazonaws.com"
      },
      "Action": "sts:AssumeRole"
    }
  ]
}

policy.json

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "Stmt1440787840000",
      "Effect": "Allow",
      "Action": [
        "lambda:InvokeFunction"
      ],
      "Resource": [
        "arn:aws:lambda:REGION:768008059222:function:3scale_auth"
      ]
    }
  ]
}

swagger.json

{
    "swagger": "2.0",
    "info": {
        "version": "1.0.0",
        "title": "Hello World API",
        "description": "A simple Hello World API ",
        "termsOfService": "http://swagger.io/terms/",
        "contact": {
            "name": "Nicolas Grenié; [email protected]"
        },
        "license": {
            "name": "MIT"
        }
    },
    "host": "placeholder.example.com",
    "basePath": "/api",
    "schemes": [
        "http"
    ],
    "consumes": [
        "application/json"
    ],
    "produces": [
        "application/json"
    ],
    "paths": {
        "/hello": {
            "get": {
                "responses": {
                    "200": {
                        "description": "A response"
                    }
                },
                "tags": [
                    "hello"
                ],
                "summary": "GET hello world",
                "description": "",
                "operationId": "GET hello world",
                "consumes": [
                    "application/json"
                ],
                "produces": [
                    "application/json"
                ],
                "x-amazon-apigateway-auth": {
                    "type": "none"
                },
                "x-amazon-apigateway-integration": {
                    "type": "AWS",
                    "uri": "arn:aws:apigateway:REGION:lambda:path/2015-03-31/functions/arn:aws:lambda:REGION:ACCT_ID:function:FUNCTION_NAME/invocations",
                    "credentials": "arn:aws:iam::ACCT_ID:role/lambda_gateway_execution",
                    "httpMethod": "POST",
                    "requestTemplates": {
                        "application/json": "{\"user_key\":\"$input.params('user_key')\",\"resourcePath\": \"$context.resourcePath\",\"httpMethod\": \"$context.httpMethod\",\"body\": $input.json('$')}"
                    },
                    "requestParameters": {},
                    "cacheNamespace": "cache-namespace",
                    "cacheKeyParameters": [],
                    "responses": {
                        "default": {
                            "statusCode": "200",
                            "responseParameters": {},
                            "responseTemplates": {
                                "application/json": null
                            }
                        }
                    }
                }
            },
            "post": {
                "responses": {
                    "200": {
                        "description": "A response"
                    }
                },
                "x-amazon-apigateway-auth": {
                    "type": "none"
                },
                "x-amazon-apigateway-integration": {
                    "type": "AWS",
                    "uri": "arn:aws:apigateway:REGION:lambda:path/2015-03-31/functions/arn:aws:lambda:REGION:ACCT_ID:function:FUNCTION_NAME/invocations",
                    "credentials": "arn:aws:iam::ACCT_ID:role/lambda_gateway_execution",
                    "httpMethod": "POST",
                    "requestTemplates": {
                        "application/json": "{\"user_key\":\"$input.params('user_key')\",\"resourcePath\": \"$context.resourcePath\",\"httpMethod\": \"$context.httpMethod\",\"body\": $input.json('$')}"
                    },
                    "requestParameters": {},
                    "cacheNamespace": "cache-namespace",
                    "cacheKeyParameters": [],
                    "responses": {
                        "default": {
                            "statusCode": "200",
                            "responseParameters": {},
                            "responseTemplates": {
                                "application/json": null
                            }
                        }
                    }
                },
                "tags": [
                    "hello"
                ],
                "summary": "POST hello world",
                "description": "",
                "operationId": "POST hello world",
                "consumes": [
                    "application/json"
                ],
                "produces": [
                    "application/json"
                ]
            }
        }
    }
}