Node.js如何在阻塞过程中处理多个并行请求

Question

I am doing a small project in which a user makes a http request to my server after which I get and process some data from three different servers and then return the summed up result to the client.

Everything works fine accept when more than two clients make requests at same time, all clients are not able to get response and faces timeout error.

How to handle this thing .

Thanks in advance

Answer 1

Ok, i get it. I would recommend using es6 promises for that kind of stuff. You can use request-promise and bluebird to make http request to other servers.

And then just:

var rp = require('request-promise');
var bluebird = require('bluebird');

bluebird
.all(rp('http://www.google.com'), rp('http://example.com'))
.then(function (googleResponse, exampleResponse) {
    // Some computation
    return someResult;
})
.then(function (previousResult) {
    // Some more computation
    return someResult;
});

Basically what you want is making part of computation, returning with then and allowing node to takeover, then in next then doing other part of computation and so on. If you split your process into few small blocks you should be able to have less blocking.

Other than that you can checkout node clustering, it is quite simple process that allows you to handle server load between few workers: https://www.sitepoint.com/how-to-create-a-node-js-cluster-for-speeding-up-your-apps/