app.js

const express = require("express");
const https = require("https");
const bodyParser = require("body-parser");

const app = express();

app.use(bodyParser.urlencoded({extended: true}));


app.get("/", function(req, res){
    res.sendFile(__dirname + "/index.html");
});

app.post("/", function(req, res){


        const query = req.body.cityName;
        const apiKey ="40b4223ecec1596c2360ed2cd7af6497";
        const url = "https://api.openweathermap.org/data/2.5/weather?q="+ query +"&appid=" + apiKey + "&units=metric";
    
        https.get(url, function(response){
            console.log(response.statusCode);
    
            response.on("data", function(data){
                const weatherData = JSON.parse(data);  
                const temp = weatherData.main.temp;
                const weatherDescription = weatherData.weather[0].description;
                const icon = weatherData.weather[0].icon;
                const imageUrl = " http://openweathermap.org/img/wn/" + icon + "@2x.png"
                res.write("<p>The weather is currently " + weatherDescription + "</p>")
                res.write("<h1>The temperature in "+ query +" is " + temp + " deg Celcius.</h1>")
                res.write("<img src="+ imageUrl +">");
                res.send();
            })
        });
});











app.listen(process.env.PORT || 3000, function(){
    console.log("Your weather app has been initialized on localHost:3000");
});