问NodeJS/SocketIO消息无法可靠传递

EN

var app = require('express')();

var http = require('http').Server(app);

var io = require('socket.io')(http);

http.listen(process.env.PORT, function(){
  console.log('listening on PORT:' + process.env.PORT);
});

io.on('connection', function(socket){

// Report a new connection and where it came from
var client_ip_address = socket.handshake.headers['x-forwarded-for'] ||    socket.request.socket.remoteAddress;
console.log("Connection from:" + client_ip_address);

socket.on('disconnect', function () {
    emitMessageToAll({type: "disconnect", ip: client_ip_address, senderID: socket.id});
});

// After a new user connects, we wait for them to emit to us the website they are currently on before notifying all users (Admin)
// Of the new connection. That way Admin can filter users by what site & page they are currently on. 
socket.on('newConnectionInfo',function(data){   
    console.log("User reports connection data: " + data.IP);    
    emitMessageToAll({type: "newConnection", ip: data.IP, url: data.url, senderID: socket.id});
});

socket.on('newBooking',function(data){  
    console.log("User reports new booking: " + data.IP);    
    emitMessageToAll({type: "newBooking", ip: data.IP,PurchDate: data.PurchDate, Surname: data.Surname});
});
});

function emitMessageToAll(data){
    io.emit('message',data);
    console.log("Sending:");
    console.log(data);
}