延迟是socket.io事件吗？

Question

I created an ajax call to the IMBd database

 // API Key key = "4dba72b2-7558-4c0f-bd18-9ffcb0999c4e"; // Url mainUrl = "http://api.myapifilms.com/imdb/top?token="+ key +"&format=json&data=0&start=1&end=250"; // API Call var request = require('request'); request(mainUrl, function (error, response, body) { if (!error && response.statusCode == 200) { // Storing data in an object var obj = JSON.parse(body), //JSON Parser movieArray = obj.data.movies, //Creating Array item = movieArray[randomMovieRank]; //Setting random movie variable itermArray = [item.ranking,item.title,item.year]; console.log(itermArray); io.sockets.emit("serverAnswer", {ranking: itermArray[0], title: itermArray[1], year: itermArray}); } }); return false; 

Followed up by:

 socket.on("serverAnswer", function(data){ console.log(data.title); }); 

The socket.on is called on the client side. The problem I am having is that it is pulling through the data very slowly if at all. The API is working as it is console logging correctly in terminal. But client side it sometimes pulls through ad sometimes doesnt. Is there something I am doing wrong?

EDIT:

Added pastebin: http://pastebin.com/TYHsqBmK

Answer 1

When you invoke the emit method, your client is not guaranteed connected,you can trigger the ajax event after the client connected or emit specified messages,such as

the server :

io.on('connection',function(socket){
    if(movies !== null)
    {
        socket.emit("serverAnswer", {movies:movies});
    }
    else{
        //1.ajax request IMDB resource
        //2.set movies variables
        //3.emit message
    }
});

the client:

socket.on("serverAnswer", function(data){
        console.log(data);
    });