devops/tf-lab-master/modules/edgeworkers/main.js

import { logger } from  'log';
import { Cookies, SetCookie } from  'cookies';

function getLanguageCookieValue(country) {
    // Initialize an empty string to store the language cookie value.	
	let languageCookieValue = '';
    // Check the country parameter and set the languageCookieValue accordingly.	
	if (country === 'US') {
		languageCookieValue = 'en_US';
	} else  if (country === 'KR') {
		languageCookieValue = 'ko_KR';
	} else  if (country === 'ES') {
		languageCookieValue = 'es_ES';
	} else  if (country === 'FR') {
		languageCookieValue = 'fr_FR';
	} else  if (country === 'DE') {
		languageCookieValue = 'de_DE';
	}
    // Return the determined languageCookieValue.
	return languageCookieValue;
}

export  function onClientRequest(request) {
	let cookies = new Cookies(request.getHeader('Cookie'));
	let languageCookie = cookies.get('language');
	logger.log('language cookie value: %s', languageCookie);
	if (languageCookie) {
		logger.log('language cookie exists. Do nothing.');
	} else {
		let country = request.userLocation.country;
		if (country) {
			let languageCookieValue = getLanguageCookieValue(country);
			if (languageCookieValue) {
				let headers = { 'Location': ['/'], 'X-Redirect': [languageCookieValue] };
				request.respondWith(302, headers, {});
			} else {
				logger.log('cannot find languageCookieValue. Do nothing.');
			}
		} else {
			logger.log('cannot find country code. Do nothing.');
		}
	}
}

export  function onClientResponse(request, response) {
	logger.log('Adding a header in ClientResponse');
	let languageCookieValue = response.getHeader('X-Redirect');
	if (languageCookieValue) {
		let cookie = new SetCookie();
		cookie.name = 'language';
		cookie.value = languageCookieValue;
		response.setHeader('Set-Cookie', cookie.toHeader());
		response.setHeader('X-GeoRedirect', 'True');
	} else {
		response.setHeader('X-GeoRedirect', 'False')
	}
}