cloud front s3 redirect

'use strict';

 const querystring = require('querystring');
 
 exports.handler = (event, context, callback) => {
    const request = event.Records[0].cf.request;
 
    // request.uri = "/zh-cn" + request.uri;
    const s3DomainName = 'static-jebai.s3.amazonaws.com'
    
    
    // before : static-jebai.s3.amazonaws.com/index.html
    
    // after  : static-jebai.s3.amazonaws.com/zh-cn/index.html
    
    request.origin = {
     s3 : {
      domainName : s3DomainName,
      region: '',
      authMethod: 'none',
      path : "/zh-cn",
      customHeaders: {}
     }
    }
    request.headers['host'] = [{key: 'host', value : s3DomainName}];
    console.log(request);
    callback(null, request);
};