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| const cors = require('cors') | |
| const cityTimezones = require('city-timezones'); | |
| // Set `useWhitelist` to `false` if you wanted to accept all requests. | |
| const config = { | |
| useWhitelist: true | |
| } | |
| // Define from which origins requests are allowed. | |
| const whitelist = [ | |
| // 'https://fiddle.jshell.net', | |
| 'https://ministryofprogramming.com', | |
| 'https://mop.ba' | |
| ]; | |
| // Parse the whitelist and decide if the request is allowed. | |
| const corsOptionsWhitelist = function (req, callback) { | |
| var corsOptions; | |
| if (whitelist.indexOf(req.header('Origin')) !== -1) { | |
| corsOptions = { origin: true } | |
| } else { | |
| corsOptions = { origin: false } | |
| } | |
| callback(null, corsOptions); | |
| } | |
| // Options when not using the whitelist. | |
| const corsOptions = { | |
| origin: true | |
| } | |
| // Handle the response within this function. It can be extended to include more data. | |
| function _geolocation(req, res) { | |
| // res.header('Cache-Control','no-cache'); | |
| const data = { | |
| country: req.headers["x-appengine-country"], | |
| region: req.headers["x-appengine-region"], | |
| city: req.headers["x-appengine-city"], | |
| cityLatLong: req.headers["x-appengine-citylatlong"], | |
| userIP: req.headers["x-appengine-user-ip"], | |
| cityData: cityTimezones.lookupViaCity(req.headers["x-appengine-city"]) | |
| } | |
| res.json(data) | |
| }; | |
| // Export the cloud function. | |
| exports.geolocation = (req, res) => { | |
| const corsHandler = config.useWhitelist ? cors(corsOptionsWhitelist) : cors(corsOptions); | |
| return corsHandler(req, res, function() { | |
| return _geolocation(req, res); | |
| }); | |
| }; |
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