微信小程序服务端，51微信小程序跳转后的页面没有tabBar是为什么？？。创建一个SOAP Web Server，fs对象读文件报如下错误，请解决。Error: EACCES: permission denied, open 'helloservice.wsdl'
at Object.fs.openSync (fs.js:652:18)


全部代码如下：
var http = require('http');var soap = require('soap');var helloService = {Hello_Service: {Hello_Port: {sayHello: function (args) {return {greeting: args.name + "Hello!!!"};}}}}
var xml = require('fs').readFileSync('helloservice.wsdl', 'utf8'),server = http.createServer(function (request, response) {response.end("404: Not Found: " + request.url)});server.listen(8000);soap.listen(server, '/wsdl', helloService, xml);console.log('Webserver start listen at http://eqeju3pb.qcloud.la:8000/wsdl?wsdl');