javascript - AWS lambda: "Handler 'handle' missing on module 'exports'" - Stac

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I have uploaded a node js express project to AWS lambda. The following is my handler code saved as exports.js:

const
  express = require('express'),
  bodyParser = require('body-parser'),
  request = require('request'),
  app = express().use(bodyParser.json()); // creates express http server

exports.handler = function(callback){
    request('http://localhost/php-rest/api.php/routes?filter=route_short_name', function(error, response, body) {
        if (!error && response.statusCode == 200) {
            message = JSON.stringify(JSON.parse(body));
            return callback(message, false);
        } else {
            return callback(null, error);;
        }
    });
}

app.get('/exports.handler', function(req, res) {

    exports.handler(function(err, data){
        if(err) return res.send(err);
        res.send(data);
    });

});

The handler code is separate from my app.js file. I got the following error when I tested it on aws lambda:

{
  "errorMessage": "Handler 'handler' missing on module 'exports'"
} 

I have uploaded a node js express project to AWS lambda. The following is my handler code saved as exports.js:

const
  express = require('express'),
  bodyParser = require('body-parser'),
  request = require('request'),
  app = express().use(bodyParser.json()); // creates express http server

exports.handler = function(callback){
    request('http://localhost/php-rest/api.php/routes?filter=route_short_name', function(error, response, body) {
        if (!error && response.statusCode == 200) {
            message = JSON.stringify(JSON.parse(body));
            return callback(message, false);
        } else {
            return callback(null, error);;
        }
    });
}

app.get('/exports.handler', function(req, res) {

    exports.handler(function(err, data){
        if(err) return res.send(err);
        res.send(data);
    });

});

The handler code is separate from my app.js file. I got the following error when I tested it on aws lambda:

{
  "errorMessage": "Handler 'handler' missing on module 'exports'"
} 

• javascript
• node.js
• amazon-web-services
• aws-lambda

Share Improve this question Follow edited Aug 8, 2018 at 20:50 Nisarg 1,64177 gold badges2020 silver badges3131 bronze badges asked Aug 8, 2018 at 20:47 RashikRashik 1,15422 gold badges1616 silver badges3636 bronze badges

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2 Answers 2

Sorted by: Reset to default 8

So this is your lambda function which should be there as a handler. In your code app.get() has to be handled by AWS API Gateway. because it is the method of invocation of lambda functions. You can't have the nodejs server inside the lambda function.

So the .zip file should be named as index.js since when we upload the .zip file it extracts the contents and find the handler name which we have provided. These are the .zip file contents that should be uploaded.

• index.js.zip

  • node_modules

  • index.js

  • package.json

  • package-lock.json

This normally appears if you don't have an index and start function. You can define it as index in the export hander:

exports.handler = function index(event, context, callback) {
    // Your start code here
}

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