Execute a javascript till node server runs in NodeJS

Question

I am using NodeJS. I am checking the response status of https://encrypted.google.com/ . I have a file in my project. Let's call it ,

status.js :-

var https = require('https');

https.get('https://encrypted.google.com/', function(res) {
  console.log("statusCode: ", res.statusCode); 
  console.log("headers: ", res.headers);

  res.on('data', function(d) {
    process.stdout.write(d);
  });

}).on('error', function(e) {
  console.error(e);
});

Now, I also have server.js file and node is running through it.

node server.js

I want to execute the status.js till the nodeserver runs. That means, it should continously check the status of https://encrypted.google.com/. What is the recommended way to do this ?

server.js :-

const express = require('express');
const bodyParser = require('body-parser');

// create express app
const app = express();

// listen for requests
app.listen(3000, () => {
    console.log("Server is listening on port 3000");
});

Geuis · Accepted Answer · 2018-07-13 00:38:42Z

1

Use a setInterval and execute the code from status.js. When your status is resolved as you want it, clear the interval via clearInterval.

answered Jul 13, 2018 at 0:38

Geuis

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Comments

Nishkal Kashyap · Accepted Answer · 2018-07-13 04:35:48Z

Ok. I think the adding an event emitter was a bit unnecessary. You can try this out. This is the typescript file. For javascript replace the imports with the respective require statements.

server.ts

import express from "express";
import http from 'http';
import { getHttpsRequests } from "./status";

//Create an http server with  the express app
const app = express();
const server = new http.Server(app);
let interval;

// listen for requests
server.listen(4300);
server.on('listening', () => {
    interval = setInterval(() => {
        getHttpsRequests();
    }, 1000);
});

//register a close event on server
server.on('close', () => {
    console.log('closing server');
    clearInterval(interval);
});

status.ts

var https = require('https');

export function getHttpsRequests() {
    //your code goes here
    https.get('https://encrypted.google.com/', function (res) {
        console.log("statusCode: ", res.statusCode);
        console.log("headers: ", res.headers);

       res.on('data', function (d) {
            process.stdout.write(d);
        });

    }).on('error', function (e) {
        console.error(e);
    });
}

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