AWS invoke local Lambda Endpoint with Node.js SDK

Question

in the SAM documentation there is the possibility shown to deploy your own lambda endpoint and call it with the Python SDK.

You just have to startup the local lambda endpoint with sam local start-lambda and then continue with

# USING AWS SDK
 -------------
 #You can also use the AWS SDK in your automated tests to invoke your functions programatically.
 #Here is a Python example:

     self.lambda_client = boto3.client('lambda',
                                  endpoint_url="http://127.0.0.1:3001",
                                  use_ssl=False,
                                  verify=False,
                                 config=Config(signature_version=UNSIGNED,
                                               read_timeout=0,
                                                retries={'max_attempts': 0}))
    self.lambda_client.invoke(FunctionName="HelloWorldFunction")

My question is now, how can i do exactly the same with the Javascript SDK? I always get different errors about missing regions, not found hosts and unsupported parameters. Do you have a solution for me?

Instead of saying "I get these errors when I try" show the actual code, and the actual error message, so we can help. We are here to help with issues, we are not here to provide a free code conversion service. — Mark B
– Mark B, Commented Oct 5, 2020 at 16:56
Yes i know, i was a bit in a hurry yesterday. Normally i provide enough code to understand my problems better. I vow improvement. — Mayor Mayer
– Mayor Mayer, Commented Oct 6, 2020 at 7:59

serge · Accepted Answer · 2020-10-05 17:03:01Z

5

AWS JavaScript SDK requires region and credentials to make requests. But for local endpoints you can use arbitrary values.

Following example works for me:

const AWS = require('aws-sdk');

const lambda = new AWS.Lambda({
  apiVersion: '2015-03-31',
  endpoint: 'http://127.0.0.1:3001',
  sslEnabled: false,
  region: 'us-east-1',
  accessKeyId: 'any',
  secretAccessKey: 'any'
});

lambda.invoke({
  FunctionName: 'HelloWorldFunction'
}, (err, res) => {
  console.log(res);
});

answered Oct 5, 2020 at 17:03

serge

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1 Comment

Mayor Mayer Over a year ago

Thanks you very much. My code looked almost the same, but something simply didn't work.

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