Using aws-sdk inside lambda? (AWS.ApiGatewayManagementApi is not a constructor at Response)

Question

I am trying to use aws-sdk inside lambda but I can't seem to figure it out.

var AWS = require('aws-sdk');
AWS.config.update();
var DDB = new AWS.DynamoDB({ apiVersion: "2012-10-08" });


exports.handler = function (event, context, callback) {
  var url_handler = event.requestContext.domainName + "/" + event.requestContext.stage;


  var scanParams = {
    TableName: "tbl-web-socket-connection",
    ProjectionExpression: "id"
  };

  DDB.scan(scanParams, function (err, data) {
    console.log(err, "Error");
    if (err) {
      callback(null, {
        statusCode: 500,
        body: JSON.stringify(err)
      });
    } else {
      console.log(AWS, "AWSSS");
      var apigwManagementApi = new AWS.ApiGatewayManagementApi({
        apiVersion: "2018-11-29",
        endpoint: event.requestContext.domainName + "/" + event.requestContext.stage
      });
    }
  });
};

This is what I declaered on the lambda function, but it gives giving me the error "AWS.ApiGatewayManagementApi is not a constructor at Response." on the cloud watch.

Did I miss something? Like maybe including the aws-sdk on the lambda function itself?

Edit: Updated to display the whole lambda function

Found a very helpful article over at Hackernoon with a 'patch' to get around the 'aws apigatewaymanagementapi is not a constructor' error. Hackernoon - Websockets & API Gateway — Reegz

mutedeuphonies mutedeuphonies · Accepted Answer · 2019-02-21T05:19:10

To those people who have the same problem as me

It looks like that the version of “aws-sdk” available in lambda execution is 2.29 ApiGatewayManagementApi is added in 2.379

That's why it cannot call the constructor.

To solve this problem, I created a layer with the aws-sdk with it and add those layer to the lambda function.

Using aws-sdk inside lambda? (AWS.ApiGatewayManagementApi is not a constructor at Response)

2 Answers