nginx as webserver incl. socket.io and node.js / ws:// 400 Bad Request

i've got this error requests.

Errors from FireBug

The last sentence in german means "Firefox cant connect to the server which is located in ws://.......".

The server wouldnt be the problem i think.

Because that here is the nginx configuration, because i think there is the problem!

server {
    server_name example.org;
    listen 80 default_server;
    root /var/www/web;

    location / # for symfony2
    {
        try_files $uri @rewriteapp;
    }

    location @rewriteapp # for symfony2
    {
                rewrite ^(.*)$ /app.php/$1 last;
    }

    location ~ ^/app\.php(/|$)
    {
        fastcgi_pass unix:/var/run/php5-fpm.sock;
        fastcgi_split_path_info ^(.+\.php)(/.*)$;
        include fastcgi_params;
        fastcgi_param HTTPS off;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    }

    location ~ ^/socket
    {
        proxy_pass http://127.0.0.1:8080;
        proxy_redirect off;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $http_host;
    }

    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;
}

nginx version: nginx/1.4.7

app.js (thats the server!)

var express = require('express'),
    io = require('socket.io').listen(server),
    server = require('http').createServer(app),
    bodyParser = require('body-parser');

var app = express();
server.listen(8080);

app.use(bodyParser.json());

app.post('/', function(request, response)
{
    response.send('OK');
    io.emit('MessageForAll', request.body);
});

io.on('connection', function (socket){});

console.log('Server running on port 8080.');

  1. Nginx(nginx version: nginx/1.4.6) Change:-

    server {
        listen   80;
        server_name 255717070.com;
        root /var/www/stack/25571070;
        index  index.html index.htm;

        location / {
        }

        location ^~ /socket {
           rewrite  ^/socket/(.*)  /$1 break; #used to send request to base url
           proxy_pass http://127.0.0.1:3000;
           proxy_redirect off;
           proxy_pass_request_headers on;
           proxy_set_header X-Real-IP $remote_addr;
           proxy_set_header Host $http_host;
           proxy_set_header X-NginX-Proxy true;
           proxy_set_header X-Forwarded-Host $host;
           proxy_set_header X-Forwarded-Server $host;
           proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
           proxy_http_version 1.1;
           proxy_set_header Upgrade $http_upgrade;
           proxy_set_header Connection "upgrade";
           proxy_set_header Host $host;

        }

}

Note: You need to change location ~ ^/socket to location ^~ /socket

Node Changes:

  1. app.js: 

    app.enable('trust proxy');
app.set('port', process.env.PORT || 3000);
var server = app.listen(app.get('port'), function() {
     debug('Express server listening on port ' + server.address().port);
});


var sockets = require('socket.io')({
  'transports': ['websocket', 'flashsocket','htmlfile','xhr-polling','jsonp-polling']
});

var io = sockets.listen(server,{ resource: '/socket.io/','sync disconnect on unload':true });

io.sockets.on('connection', function (socket) {  
  setInterval(function() {socket.emit('news', { hello: 'hello world' })}, 1000);
});

  2. index.ejs:

    <!DOCTYPE html>
<html>
  <head>
    <title><%= title %></title>
    <link rel='stylesheet' href='/socket/stylesheets/style.css' />
  </head>
  <body>
    <h1><%= title %></h1>
    <p>Welcome to <%= title %></p>
    <div id="divID">

    </div>
    <script src="http://www.25571070.com/socket/socket.io/socket.io.js"></script>
        <script>
            var socket = io.connect('ws://25571070.com');
            //var socket = io.connect('http://www.25571070.com');
            var i = 0;
            socket.on('news', function(data) {
                var div = document.getElementById('divID');
                i = i + 1;
                div.innerHTML = div.innerHTML + '<p>'+ data.hello+'('+i+')'+'</p>';
                console.log(data);
            });
        </script>
  </body>
</html>

package.json:

{
  "name": "25571070",
  "version": "0.0.0",
  "private": true,
  "scripts": {
    "start": "node ./bin/www"
  },
  "dependencies": {
    "body-parser": "~1.6.6",
    "cookie-parser": "~1.3.2",
    "debug": "~1.0.4",
    "ejs": "~0.8.5",
    "express": "~4.8.6",
    "moment": "^2.8.2",
    "morgan": "^1.2.3",
    "serve-favicon": "^2.0.1",
    "socket.io": "^1.0.6",
    "stylus": "0.42.3"
  }
}

Firefox Response:

Firefox websocket response

Chrome Response:

Chrome Websocket Response

FYI. I have used below version:

  • "node": "v0.10.31"
  • "ejs": "~0.8.5"
  • "express": "~4.8.6",
  • "socket.io": "^1.0.6"
  • "nginx": "1.4.6"

For Quick Start With node.js go to node.js-socket.io-express-ngnix-starter

Can I see the server code?

Have you double-checked that the websocket port is not blocked by any firewall?

I think you've already read this blog post, right?