app.js

require('dotenv').config()
const express = require('express')
const bodyparse = require("body-parser")
var request = require("request");
const app = express()
const port = 3000
currencyCodes = {"AED": "United Arab Emirates dirham","AFN": "Afghan afghani","ALL": "Albanian lek","AMD": "Armenian dram","ANG": "Netherlands Antillean guilder","AOA": "Angolan kwanza","ARS": "Argentine peso","AUD": "Australian dollar","AWG": "Aruban florin",    "AZN": "Azerbaijani manat",    "BAM": "Bosnia and Herzegovina convertible mark",    "BBD": "Barbados dollar",    "BDT": "Bangladeshi taka",    "BGN": "Bulgarian lev",    "BHD": "Bahraini dinar",    "BIF": "Burundian franc",    "BMD": "Bermudian dollar",    "BND": "Brunei dollar",    "BOB": "Boliviano",    "BRL": "Brazilian real",    "BSD": "Bahamian dollar",    "BTN": "Bhutanese ngultrum",    "BWP": "Botswana pula",    "BYN": "New Belarusian ruble",    "BYR": "Belarusian ruble",    "BZD": "Belize dollar",    "CAD": "Canadian dollar",    "CDF": "Congolese franc",    "CHF": "Swiss franc",    "CLF": "Unidad de Fomento",    "CLP": "Chilean peso",    "CNY": "Renminbi Chinese yuan",    "COP": "Colombian peso",    "CRC": "Costa Rican colon",    "CUC": "Cuban convertible peso",    "CUP": "Cuban peso",    "CVE": "Cape Verde escudo",    "CZK": "Czech koruna",    "DJF": "Djiboutian franc",    "DKK": "Danish krone",    "DOP": "Dominican peso",    "DZD": "Algerian dinar",    "EGP": "Egyptian pound",    "ERN": "Eritrean nakfa",    "ETB": "Ethiopian birr",    "EUR": "Euro",    "FJD": "Fiji dollar",    "FKP": "Falkland Islands pound",    "GBP": "Pound sterling",    "GEL": "Georgian lari",    "GHS": "Ghanaian cedi",    "GIP": "Gibraltar pound",    "GMD": "Gambian dalasi",    "GNF": "Guinean franc",    "GTQ": "Guatemalan quetzal",    "GYD": "Guyanese dollar",    "HKD": "Hong Kong dollar",    "HNL": "Honduran lempira",    "HRK": "Croatian kuna",    "HTG": "Haitian gourde",    "HUF": "Hungarian forint",    "IDR": "Indonesian rupiah",    "ILS": "Israeli new shekel",    "INR": "Indian rupee",    "IQD": "Iraqi dinar",    "IRR": "Iranian rial",    "ISK": "Icelandic króna",    "JMD": "Jamaican dollar",    "JOD": "Jordanian dinar",    "JPY": "Japanese yen",    "KES": "Kenyan shilling",    "KGS": "Kyrgyzstani som",    "KHR": "Cambodian riel",    "KMF": "Comoro franc",    "KPW": "North Korean won",    "KRW": "South Korean won",    "KWD": "Kuwaiti dinar",    "KYD": "Cayman Islands dollar",    "KZT": "Kazakhstani tenge",    "LAK": "Lao kip",    "LBP": "Lebanese pound",    "LKR": "Sri Lankan rupee",    "LRD": "Liberian dollar",    "LSL": "Lesotho loti",    "LYD": "Libyan dinar",    "MAD": "Moroccan dirham",    "MDL": "Moldovan leu",    "MGA": "Malagasy ariary",    "MKD": "Macedonian denar",    "MMK": "Myanmar kyat",    "MNT": "Mongolian tögrög",    "MOP": "Macanese pataca",    "MRO": "Mauritanian ouguiya",    "MUR": "Mauritian rupee",    "MVR": "Maldivian rufiyaa",    "MWK": "Malawian kwacha",    "MXN": "Mexican peso",    "MXV": "Mexican Unidad de Inversion",    "MYR": "Malaysian ringgit",    "MZN": "Mozambican metical",    "NAD": "Namibian dollar",    "NGN": "Nigerian naira",    "NIO": "Nicaraguan córdoba",    "NOK": "Norwegian krone",    "NPR": "Nepalese rupee",    "NZD": "New Zealand dollar",    "OMR": "Omani rial",    "PAB": "Panamanian balboa",    "PEN": "Peruvian Sol",    "PGK": "Papua New Guinean kina",    "PHP": "Philippine peso",    "PKR": "Pakistani rupee",    "PLN": "Polish złoty",    "PYG": "Paraguayan guaraní",    "QAR": "Qatari riyal",    "RON": "Romanian leu",    "RSD": "Serbian dinar",    "RUB": "Russian ruble",    "RWF": "Rwandan franc",    "SAR": "Saudi riyal",    "SBD": "Solomon Islands dollar",    "SCR": "Seychelles rupee",    "SDG": "Sudanese pound",    "SEK": "Swedish krona",    "SGD": "Singapore dollar",    "SHP": "Saint Helena pound",    "SLL": "Sierra Leonean leone",    "SOS": "Somali shilling",    "SRD": "Surinamese dollar",    "SSP": "South Sudanese pound",    "STD": "São Tomé and Príncipe dobra",    "SVC": "Salvadoran colón",    "SYP": "Syrian pound",    "SZL": "Swazi lilangeni",    "THB": "Thai baht",    "TJS": "Tajikistani somoni",    "TMT": "Turkmenistani manat",    "TND": "Tunisian dinar",    "TOP": "Tongan paʻanga",    "TRY": "Turkish lira",    "TTD": "Trinidad and Tobago dollar",    "TWD": "New Taiwan dollar",    "TZS": "Tanzanian shilling",    "UAH": "Ukrainian hryvnia",    "UGX": "Ugandan shilling",    "USD": "United States dollar",    "UYI": "Uruguay Peso en Unidades Indexadas",    "UYU": "Uruguayan peso",    "UZS": "Uzbekistan som",    "VEF": "Venezuelan bolívar",    "VND": "Vietnamese đồng",    "VUV": "Vanuatu vatu",    "WST": "Samoan tala",    "XAF": "Central African CFA franc",    "XCD": "East Caribbean dollar",    "XOF": "West African CFA franc",    "XPF": "CFP franc",   "YER": "Yemeni rial",    "ZAR": "South African rand",    "ZMW": "Zambian kwacha",    "ZWL": "Zimbabwean dollar"}
countryname=[];
countrycode=[];

app.use( express.static( "static" ) );
app.use(bodyparse.urlencoded({extended:true}));
app.set("view engine","ejs");

app.get('/', function (req, res){
    res.render("list",{name:currencyCodes,answ:""});
}); 

app.post('/', function (req, res) {
    money1 = req.body.money1;
    money2 = req.body.money2;
    finalurl = 'https://www.alphavantage.co/query?function=CURRENCY_EXCHANGE_RATE&from_currency=' + money1 + '&to_currency=' + money2 + '&apikey='+ process.env.API;

    request(finalurl, function (error, response, body) {
        if (error) throw new Error(error);
        var data = JSON.parse(body);
        var real = JSON.parse(data["Realtime Currency Exchange Rate"]['5. Exchange Rate']);

        from = JSON.stringify(data["Realtime Currency Exchange Rate"]['2. From_Currency Name']);
        to = JSON.stringify(data["Realtime Currency Exchange Rate"]['4. To_Currency Name']);

        to = to.replace(/\"/g, "");
        from = from.replace(/\"/g, "");

        answer = "Your " + from + " is worth " + real.toFixed(3) + ' of ' + to;

        res.render("list",{name:currencyCodes,answ:answer});
    });

});

app.listen(port, () => console.log(`Example app listening on port port!`))