routeByCountryCode.js

'use strict';

exports.handler = (event, context, callback) => {
    const request = event.Records[0].cf.request;
    const s3DomainName = 'static-jebai.s3.amazonaws.com';
    const countryCode = request.headers['cloudfront-viewer-country'][0].value.toLowerCase();
    request.origin = {
        s3: {
            domainName: s3DomainName,
            region: '',
            authMethod: 'none',
            path: "/" + countryCode,
            customHeaders: {}
        }
    }
    request.headers['host'] = [{ key: 'host', value: s3DomainName }];
    callback(null, request);
};