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I have a tracking app built with Node that is accessed by other sites in our network. They will access the app thru the head of their html files like so:
<title>Test</title>
<meta name="generator" content="TextMate http://macromates.com/">
<script src="http://mynetwork.com:1337/tracker.js?pid=publisher1&ps=home"></script>
</head>
<body>
The tracker.js file uses socket.io to connect to app.js which stores some data in MongoDB. For some reason when start socket.io then load a page that references that Tracker.js scripts I get an error "Uncaught SyntaxError: Unexpected identifier" on line 1 which is actually the “Welcome to socket.io." message and not the javascript thats in the file.
Here is what Tracker.js looks like:
(function(document, onload){
var io = document.createElement('script');
io.src = "//cdn.socket.io/stable/socket.io.js";
io.setAttribute('async', 'true');
if ( typeof onload === 'function') {
io.onloadDone = false;
io.onload = function() {
io.onloadDone = true;
onload();
};
io.onreadystatechange = function() {
if ( "loaded" === io.readyState && !io.onloadDone ) {
io.onloadDone = true;
io.onload();
}
};
}
(document.getElementsByTagName('head') || document.getElementsByTagName('body'))[0].appendChild(io);
});
(document, function(){
var socket = io.connect('http://mynetwork.com:1337');
socket.emit('adTracker',
{ adServer: 'datalunk', adZone : 'top_home', referingURL : 'site.com' }
);
socket.on('entrance', function(){
console.log('Response is:' + data.message);
});
});
The app.js file looks like this:
var io = require('socket.io');
var tracker = io.listen(1337);
tracker.configure(function () {
tracker.set('authorization', function (handshakeData, callback) {
if (handshakeData.xdomain) {
callback('Cross-domain connections are not allowed');
} else {
callback(null, true);
}
});
});
tracker.sockets.on('connection', function (socket) {
socket.on('entrance', {message: 'connection has been made to app.js'});
socket.on('adTracker', function (data) {
var adRequestData = data;
var pass = ["bigbooks"];
var databaseUrl = "user:[email protected]:10006/node-test";
var collections = ["mads"]
var db = require("mongojs").connect(databaseUrl, collections);
db.cmnads.insert({adRequest : adRequestData}, {$set: {password: pass}}, function(err, updated) {
if( err || !updated ) console.log("User not updated");
else console.log("User updated");
});
});
});
Can anyone tell me why I would be getting the socket.io welcome message & error on line 1 and how do I resolve it?
728
(function(document, onload){
var io = document.createElement('script');
// rest of code
});
(document, function(){
// rest of code
});
});
should be
(function(document, onload){
var io = document.createElement('script');
// rest of code
})(document, function(){
// rest of code
});
});
You use an anonymous function that you should call (and you don't do it).
the correct syntax is (for a more simple example):
(function(a) {console.log(a)})('Hello World');
However you do:
(function(a) {console.log(a)});
('Hello World');
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