Invoking a file from AWS lambda handler.js?

Question

I have node.js file(i.e.abc.js) which will give the output when i run in my node.js editor. I want to run the same file in AWS Lambda.For that, I created a lambda and moved abc.js to there. To run, it seems i need to implement my abc.js file in handler.js(i.e.in lambda way means callback etc).

Is there any way to trigger abc.js from handler.js rather than implementing again the same thing in handler.js?

Checked regarding the above usecase but didn't find much on google.

Updated

My abc.js file

var AWS = require('aws-sdk');
// Set the region 
AWS.config.update({
    region: "ap-south-1"
   });

// Create S3 service object
s3 = new AWS.S3();
var params= {};
 s3.listBuckets(params, bucketList);
function bucketList(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else   
  {   
        console.log(data)
  }
}

My handler.js in lambda and modifying it based on my interpretation of your answer.

exports.handler = async (event) => {
    const abc = require('./abc.js');
    // TODO implement
abc.bucketList();     
};

This is the error i am getting

Response:
{
  "errorMessage": "abc.bucketList is not a function",
  "errorType": "TypeError",
  "stackTrace": [
    "exports.handler (/var/task/index.js:5:5)"
  ]
}

Any help is appreciated.

cementblocks · Accepted Answer · 2018-09-13 17:52:28Z

3

Require your file

const abc = require('./abc.js');

And in the handler function call your code

abc.yourExportedMethod();

answered Sep 13, 2018 at 17:52

cementblocks

4,64520 silver badges26 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Private Over a year ago

Could you elaborate ? When i tried abc.yourExportedMethod(); in my handler.js it is throwing error. Please check my Updated Section in my question

Nikolay Vetrov · Accepted Answer · 2018-09-14 00:20:50Z

0

You have some issues inside of your abc.js file.

Try this snippet:

const abc = async function() 
{
    try
    {
        const AWS = require('aws-sdk');
        let s3 = new AWS.S3({region: "ap-south-1", apiVersion: '2006-03-01' });
        let params= {};
        const s3Response = await s3.listBuckets(params).promise();

        console.log(s3Response); // your list of buckets 

    }
    catch (ex)
    {
        console.error(ex);
    }
}

export default abc;

answered Sep 14, 2018 at 0:20

Nikolay Vetrov

6346 silver badges17 bronze badges

Comments

gk0r · Accepted Answer · 2019-11-05 11:03:13Z

0

Add the following line at the bottom of your abc.js

exports.bucketList = bucketList

and the rest will work as you expect it to.

answered Nov 5, 2019 at 11:03

gk0r

6066 silver badges9 bronze badges

Collectives™ on Stack Overflow

Invoking a file from AWS lambda handler.js?

3 Answers 3

1 Comment

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related