I'm trying out a JSONP call. I have a NodeJs app in server 1, under domain domain1.com looking like this:
server.get('/api/testjsonp', function(req, res) {
var clientId = req.param('clientId');
res.header('Content-Type', 'application/json');
res.header('Charset', 'utf-8')
res.send(req.query.callback + '({"something": "rather", "more": "fun",
"sourceDomain": "' + req.headers.origin + '"' + ',"clientId":"' + clientId +
'"});');
});
In another server (server 2) and under a different domain (domain2.com), I have created a test html page with a call like this:
var data = { clientId : 1234567890 };
$.ajax({
dataType: 'jsonp',
data: data,
jsonp: 'callback',
url: 'https://domain1.com/api/testjsonp?callback=1',
success: function(data) {
alert('success');
},
error: function(err){
alert('ERROR');
console.log(err);
}
});
I have 2 problems here:
1) Why is this working? Isn't it a cross-domain call and therefore I'd need to implement the ALLOW-ORIGIN headers stuff? I'm following this example:
http://css.dzone.com/articles/ajax-requests-other-domains
http://benbuckman.net/tech/12/04/cracking-cross-domainallow-origin-nut
2) In the server, I can't figure out which domain is making the call, req.headers.origin is always undefined. I'd like to be able to know which domain is calling, to prevent unwanted calls. Alternative I could check for the calling IP, any idea how?
Many thanks