Pusher / auth 404

Question

I'm trying to establish a private channel using Pusher on a local node.js server. For some reason, I can't get my auth endpoint to play nice and I keep getting a 404 error.

At first I thought it was an issue with how I was defining my endpoint in relation to the location of the local server, but I don't think that's problem. More likely, my noobiness with server-client-api communication means I'm missing some big piece.

I've looked through the authentication docs on pusher and literally every SO thread I could find, but to no avail.

I've got node installed and the server running, and pusher recognizes that a connection is made, I'm just failing at the authentication.

Any help at all would be mightily appreciated.

Here's the client-side JS that is called when a button is clicked over at index.html:

In client.js:

    function startGame(){
    var nameinput = prompt("Give your game a name","My Game");
    if (nameinput !== null) {
        var initialsinput = prompt("What are your initials?", "MG");
        if (initialsinput !== null) {
            var pusher = new Pusher(key);
            Pusher.channel_auth_endpoint = 'http://localhost:8080/pusher/auth.js';
            var channel = pusher.subscribe("private-"+gamename);
            joined = 'client-opponent_joined'+gamename;
            channel.bind('client-opponent_joined'+gamename, function(data) {
                OnLikeDonkeyKong(data.nameinput,data.initialsinput);
            });
        }
        else {alert("I need your initials.");}
    }
    else {alert ("I need a game name.");}
}

Then, over in /pusher/auth.js:

var express = require( 'express' );
var Pusher = require( 'pusher' );

    var app = express( express.logger() );
    app.use( express.bodyParser() );

    var pusher = new Pusher( { appId: 'xxx', key: 'xxx', secret: 'xxx' } );

    app.post( '/pusher/auth.js', function( req, res ) {
      var socketId = req.body.socket_id;
      var channel = req.body.channel_name;
      var auth = pusher.authenticate( socketId, channel );
      res.send( auth );
    } );

    var port = process.env.PORT || 8080;
    app.listen( port );

Finally, here's the error I'm getting:

POST http://localhost:8080/pusher/auth.js 404 (Not Found) 

Answer 1

http://localhost:8080/pusher/auth.js

This url is not exist on server. Check the location of auth.js again.

From Pusher document (link)

authEndpoint (String)

Endpoint on your server that will return the authentication signature needed for private and presence channels. Defaults to '/pusher/auth'.

So you need to create your authentication endpoint on your server and provide a link to it while setup Pusher instance to authenticate.