AWS Lambda - Custom Authorization

Lambda Code

Refer

https://stackoverflow.com/questions/41451582/c-sharp-implementation-of-aws-api-gateway-custom-authorization-lambda

http://docs.aws.amazon.com/apigateway/latest/developerguide/use-custom-authorizer.html

public AuthPolicy Authorization(TokenAuthorizerContext request)

{

    var token = request.AuthorizationToken;

    switch (token.ToLower())

    {

        case "allow":

            return generatePolicy("user", "Allow", request.MethodArn);

        case "deny":

            return generatePolicy("user", "Deny", request.MethodArn);

    }

    return null;

}

At Lambda to Custom Authorization

Add Custom Authorization to API Gateway Method

POSTMAN Test

AWS Lamda

• Service that lets you run code without managing servers (server-less)
• Execute your code when needed and scales automatically. (no charge when your code not running)
• Included Server and OS maintenance, auto scaling,  code monitoring and logging (FOC)
• Support Node.js, Java, C# and Python.
• It can run your code in response to events. E.g. Data Processing trigger for Amazon S3 or Amazon DyanamoDB
• It can build Serverless applications. (only concern your code)
• Outsider call Lambda thru API Gateway
• Lambda can be custom authorization  at API Gateway

Step to create Lambda Project in VS2017

1) Need to Install AWS Extension

2) Deployment

3) API Gateway