CODEWITHSUNDEEP
node.jsexpresssocket.io
Joshua Terrill
Joshua Terrill

Reputation: 2017

Emitting and receiving socket io within the same file

I want to do something where I can set up a route to a link like /visit using app.get('/visit', function(req, res){}) etc. And inside that, I want to emit a message like socket.emit("event", "a message") and then inside my io.on("connection") function, be able to listen for event and return the message. All the examples that I've seen seem to have an example of how to do this when an html page is visited... but how can I do it with just general routes that display something like res.json()?

Upvotes: 0

Views: 596

Answers (1)

Blubberguy22
Blubberguy22

Reputation: 1332

If you are trying to emit and listen for events within the same file, you should be using the built in event listeners for node, not the specialized ones for socket.io (https://nodejs.org/api/events.html):

var EventEmitter = require('events').EventEmitter;
var eventExample = new EventEmitter;

//You can create event listeners:
eventExample.on('anEvent', function(someData){
    //Do something with someData
});

//To trigger an event listener you must emit:
eventExample.emit('anEvent', someData);

Upvotes: 1

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