C# function can be invoked but not called through GET

Serverless Framework
1

Hi.

I’m trying to run the aws-csharp template. I manage to invoke it but when I try to call it through the API, it responds “Internal server error”. Calling functions through the API has worked with nodejs, python and java, but doesn’t work with C#. How can I make it work? What’s missing?

serverless.yml:

service: csharpExample

provider:
name: aws
runtime: dotnetcore1.0

package:
artifact: bin/release/netcoreapp1.0/deploy-package.zip
functions:
hello:
handler: CsharpHandlers::AwsDotnetCsharp.Handler::Hello
events:
- http: GET hello

Handler.cs:
using Amazon.Lambda.Core;
using System;

[assembly:LambdaSerializer(typeof(Amazon.Lambda.Serialization.Json.JsonSerializer))]

namespace AwsDotnetCsharp
{
public class Handler
{
public Response Hello(Request request)
{
return new Response(“Go Serverless v1.0! Your function executed successfully!”, request);
}
}

public class Response
{
  public string Message {get; set;}
  public Request Request {get; set;}

  public Response(string message, Request request){
    Message = message;
    Request = request;
  }
}

public class Request
{
  public string Key1 {get; set;}
  public string Key2 {get; set;}
  public string Key3 {get; set;}

  public Request(string key1, string key2, string key3){
    Key1 = key1;
    Key2 = key2;
    Key3 = key3;
  }
}

}

2

Hello everyone, I found the solution to this problem.
I found an old and outdated tutorial explaining how to do this and combined with the AWS C# template.

Handler.cs:

using System; 
using Amazon.Lambda.Core;
using Amazon.Lambda.Serialization.Json;
using Amazon.Lambda.APIGatewayEvents;

[assembly:LambdaSerializer(typeof(Amazon.Lambda.Serialization.Json.JsonSerializer))]

namespace AwsDotnetCsharp { 
    public class Handler { 
        public APIGatewayProxyResponse Hello(APIGatewayProxyRequest request, ILambdaContext context) { 
            context.Logger.LogLine("This is useful for debugging!"); 
            return new APIGatewayProxyResponse() {
                StatusCode = 200, 
                Body = "Go Serverless v1.0! Your function executed successfully!", 
            }; 
        }    
    } 
}

serverless.yml:

    service: csharpExample

    provider:
      name: aws
      runtime: dotnetcore1.0

    package:
      artifact: bin/release/netcoreapp1.0/deploy-package.zip

    functions:
      hello:
        handler: CsharpHandlers::AwsDotnetCsharp.Handler::Hello
        events:
            - http:
                path: hello
                method: GET
                cors: true