server.js

'use strict';
var request = require('request');
var http = require('http');

http.createServer(function (serverRequest, serverResponse) {
    var url = require('url');
    var url_parts = url.parse(serverRequest.url, true);
    var query = url_parts.query;
    var pathName = url_parts.pathname;

    var mode = query.mode;
    var finalUrl = "";

    if (pathName == "/places") {
        finalUrl = "https://maps.googleapis.com/maps/api/place/nearbysearch/json?";
        finalUrl += "location=" + query.location + "&";
        finalUrl += "radius=" + query.radius + "&";
        finalUrl += "type=" + query.type + "&";
        finalUrl += "keyword=" + query.keyword + "&";
        finalUrl += "key=AIzaSyCezipVJkYSdRmEtwdg37OEgW7_fODwvSU";
    }
    else if (pathName == "/geocode") {
        finalUrl = "https://maps.googleapis.com/maps/api/geocode/json?";
        finalUrl += "address=" + query.location + "&";
        finalUrl += "key=AIzaSyCezipVJkYSdRmEtwdg37OEgW7_fODwvSU";
    }
    else if (pathName == "/nextpage") {
        finalUrl = "https://maps.googleapis.com/maps/api/place/nearbysearch/json?";
        finalUrl += "pagetoken=" + query.nextPageToken + "&";
        finalUrl += "key=AIzaSyCezipVJkYSdRmEtwdg37OEgW7_fODwvSU";
    }
    else if (pathName == "/details") {
        finalUrl = "https://maps.googleapis.com/maps/api/place/details/json?";
        finalUrl += "placeid=" + query.placeId + "&";
        finalUrl += "key=AIzaSyCezipVJkYSdRmEtwdg37OEgW7_fODwvSU";
    }
    else if (pathName == "/yelpmatch") {
        finalUrl = "https://api.yelp.com/v3/businesses/matches/best?";
        finalUrl += "name=" + query.name + "&";
        finalUrl += "city=" + query.city + "&";
        finalUrl += "state=" + query.state + "&";
        finalUrl += "country=" + query.country + "&";
        finalUrl += "address1=" + query.address1 + "&";
        finalUrl += "postal_code=" + query.postalCode;
    }
    else if (pathName == "/yelpreviews") {
        finalUrl = "https://api.yelp.com/v3/businesses/";
        finalUrl += query.id + "/reviews";
    }

    Run(serverRequest, serverResponse, finalUrl, pathName);
}).listen(process.env.PORT || 3000);

function Run(serverRequest, serverResponse, finalUrl, pathName) {
    var headers = { 'User-Agent': 'request' };

    if (pathName == "/yelpmatch" || pathName == "/yelpreviews") {
        headers = { 'Authorization': 'Bearer QkGxQZuSrClCGs2pREeNigSVT0f5OuWY9PuVoLfJyiD4OtCWB1wEWjeJ2HKVlAv65oXaozuboCBSQtO7vFHIWjCBO9mxgYF8il3M52cuFZZKMYTsm1wg3XIMp3CzWnYx' };
    }

    var options = {
        url: finalUrl,
        json: true,
        headers: headers
    }
    request.get(options, function (error, apiResponse, apiData) {
        serverResponse.setHeader('Access-Control-Allow-Origin', '*');
        serverResponse.setHeader('Content-Type', 'application/json');

        if (error) {
            serverResponse.end(JSON.stringify({ 'Error': error }));
        }
        else if (apiResponse.statusCode !== 200) {
            serverResponse.end(JSON.stringify({ 'Error': apiResponse.statusCode }));
        }
        else {
            serverResponse.end(JSON.stringify(apiData));
        }
    });
}