有弹性 将原始HTTP流量从传入的HTTP请求传递到远程端点 例子 route.js 根据主机字段将请求路由到端口8001和8002上的服务器: var bouncy = require ( 'bouncy' ) ; var server = bouncy ( function ( req , res , bounce ) { if ( req . headers . host === 'beep.example.com' ) { bounce ( 8001 ) ; } else if ( req . headers . host === 'boop