Invoking a webpage using Lambda with node.js - aws-lambda

Question

I am learning AWS and as part of that I am trying to create a Lambda using node.js.
I am trying to invoke a webpage using the following, please correct me. What I am missing?
const opn = require('opn');
opn('http://google.com', {app: 'firefox'});

Answer 1

I wrote up a post detailing how to set this up if you only want to hit URLs with Lambda. You can find it here.
If you already know how to setup IAM permissions and scheduling with CloudWatch, the code I used accomplished this with Node.js 6.10 runtime:
exports.handler = (event, context, callback) => {
var urls = event.urls;
var http = require("http");
var https = require("https");
for (var i = 0; i < urls.length; i++) {
var protocol = urls[i].Protocol;
var domain = urls[i].Domain;
var queryString = urls[i].QueryString;
var url = protocol + "://" + domain + queryString;
if (protocol.toLowerCase() === "http") {
var j = i;
http.get(url, function(res) {
// Get around async.
var requestUrl = urls[j].Protocol + "://" + urls[j].Domain + urls[j].QueryString;
console.log("Response from " + requestUrl + ": ");
console.log(res.statusCode);
console.log(res.statusMessage);
}).on('error', function(e) {
console.log("Got error: " + e.message);
});
} else if (protocol.toLowerCase() === "https") {
https.get(url, function(res) {
var j = i;
// Get around async.
var requestUrl = urls[j].Protocol + "://" + urls[j].Domain + urls[j].QueryString;
console.log("Response from " + requestUrl + ": ");
console.log(res.statusCode);
console.log(res.statusMessage);
}).on('error', function(e) {
console.log("Encountered error: " + e.message);
});
}
// Force break due to async -> output.
if ((i+1) == urls.length) {
break;
}
}
};
You would define the URLs you would like to invoke by passing an event object that is similar to the following:
{"urls": [{
"Protocol": "HTTP",
"Domain": "www.aaronmedacco.com",
"QueryString": ""}, {
"Protocol": "HTTPS",
"Domain": "www.google.com",
"QueryString": "?key=value"}]}
Again, if you want a step by step, check out this post. Simple to set up.