Node Express 3x套接字IO测试

Question

I try to add socket IO to my project but I didn't manage to make it work.

my app.js

/**
 * Module dependencies.
 */

var express = require('express');
var routes = require('./routes');
var user = require('./routes/user');
var http = require('http');
var path = require('path');

var app = express();

// all environments
app.set('port', process.env.PORT || 3000);
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));

// development only
if ('development' == app.get('env')) {
  app.use(express.errorHandler());
}

app.get('/', routes.index);
app.get('/users', user.list);

    var server = http.createServer(app).listen(app.get('port'), function(){
  console.log('Express server listening on port ' + app.get('port'));
});


  //IO Config

var io = require("socket.io").listen(server);
io.sockets.on('connection', function (socket) {
    socket.emit('makealert');
});

my views:

extends layout

script(type='text/javascript' src='../node_modules/socket.io/lib/socket.io.js')

script(type='text/javascript'
  var socket = io.connect();
  socket.on('makealert', function () {
      alert('Boom');
  });
)

block content
  h1= title
  p Welcome to #{title}

my route:

exports.index = function(req, res){
  res.render('index', { title: 'Express' });
};

I have 2 problems: -first what's the way to find socket.io.js (in a jade view) -second, is my app.js OK ? -thrid, my console said:

SyntaxError: Node/thrid_app/demo-express/views/index.jade:5 3| script(type='text/javascript' src='../node_modules/socket.io/lib/socket.io.js') 4|

5| script(type='text/javascript' 6| var socket = io.connect(); 7| socket.on('makealert', function () {

Ty for yours helps

Answer 1

The error you have mentioned is due to syntax error in jade

change this line

script(type='text/javascript'
  var socket = io.connect();
  socket.on('makealert', function () {
      alert('Boom');
  });
)

to

script(type='text/javascript')
  var socket = io.connect();
  socket.on('makealert', function () {
      alert('Boom');
  });

Answer 2

Some mistakes in your code, also you seem to be using old jade syntax.

1. You are missing a comma in script(type='text/javascript' src='../') . It should be script(type='text/javascript', src='../')
2. Since jade 0.31, script must be used as script. or script(...). . Likewise for style .

3. Your last script tag in view is closed incorrectly

    script(type='text/javascript' ... ) 

   Should be like this

    script(type='text/javascript') ...