无法使socket.io-emitter与socket.io-redis一起使用

Question

i have a pretty simple code, trying to emit from an external process into a socket.io server.

server.js

var io = require('socket.io')(3201);
var redis = require('socket.io-redis');
io.adapter(redis({ host: 'localhost', port: 6379 }));

io.on('connection', function (socket) {
  console.log("test 1");
  socket.on('testemit', function (data) {
      console.log("test 2");
      console.log(data);
  });
});

the client, emit.js (as found in the docs):

var io = require('socket.io-emitter')({ host: '127.0.0.1', port: 6379 });
setInterval(function(){
      io.emit('testemit', {a: 'aaa'});
}, 3000);

on the server side, if i run it with

 DEBUG=* node server.js

all i get is:

socket.io:server initializing namespace / +0ms
  socket.io:server creating http server and binding to 3201 +3ms
  socket.io:server creating engine.io instance with opts {"path":"/socket.io"} +1ms
  socket.io:server attaching client serving req handler +2ms
  socket.io-parser encoding packet  aaa {"type":2,"data":["testemit",{"a":"aaa"}],"nsp":"/"} +0ms
  socket.io-parser encoded {"type":2,"data":["testemit",{"a":"aaa"}],"nsp":"/"} as 2["testemit",{"a":"aaa"}] +1ms

but the callback in for testemit does not get called at all.

what am i missing?

Answer 1

i completely misunderstood this. all works.

the emit does an emit to all the socket.io clients of this socket.io server.

so in the browser it works, like this:

        _socket = io.connect(url);
        _socket.on('testemit', function (message) {
            console.log('testemit');
            console.log(message);
        });

i am wrongly expecting it to work in the server too.