AWS Lambda: Error: getaddrinfo ENOTFOUND

Question

here's the code in AWS Lambda function:

var https = require('https');
exports.handler = (event, context, callback) => {
    var params = {
        host: "bittrex.com",
        path: "/api/v1.1/public/getmarketsummaries"
    };
    var req = https.request(params, function(res) {
        var test = res.toString();
        console.log(JSON.parse(test));
        //console.log(JSON.parse(res.toString()));
    });
    req.end();
};

Error: getaddrinfo ENOTFOUND https://bittrex.com https://bittrex.com:443 at errnoException (dns.js:28:10) at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:76:26)

I am not able to figure, please help. Other solutions did not work.

Answer 1

Remove the https:// from the host. The require already says you're using https/SSL.

Answer 2

The issue is with your security groups. Looks like your lambda doesn’t have access to resolve DNS. Check if you lambda sec groups have port 53 UDP and TCP enabled.

Answer 3

I modified your code to work correctly in AWS Lambda Node.js 6.10. I set the Lambda timeout to be 60 seconds for testing.

The big change is adding "res.on('data', function(chunk) {}:" and "res.on('end', function() {}".

var https = require('https');
exports.handler = (event, context, callback) => {
    var params = {
        host: "bittrex.com",
        path: "/api/v1.1/public/getmarketsummaries"
    };
    var req = https.request(params, function(res) {
        let data = '';
        console.log('STATUS: ' + res.statusCode);
        res.setEncoding('utf8');
        res.on('data', function(chunk) {
            data += chunk;
        });
        res.on('end', function() {
            console.log("DONE");
            console.log(JSON.parse(data));
        });
    });
    req.end();
};