CODEWITHSUNDEEP
javascriptxmlhttprequestcors
VCake
VCake

Reputation: 333

Can't get a XMLHttpRequest's response neither from local file:/// nor from local web server

I want to develop a small RSS reader that will fetch the XML documents from various websites. I thought that XHR would be simple, if a user can manipulate the browser UI to fetch an obviously "Cross Origin" web page, shouldn't JavaScript code be able to do so as easily? apparently no :/

Here is what I'm trying to do:

var xhr = new XMLHttpRequest();
    // A real feed URL, its web server should allow CORS
    xhr.open('GET', 'http://feeds2.feedburner.com/thenextweb');
    xhr.send();

Locally opening my HTML page (file:///) makes the Origin null and the response empty, but if i access the page trough a local web server (i tried Python and Node server scripts), the Origin is not null but the response is still empty.

I know there are enough XHR questions around, but can someone point out what am i missing?

Upvotes: 0

Views: 534

Answers (1)

Hallvar Helleseth
Hallvar Helleseth

Reputation: 1867

Feedburner does not support CORS (yet). These are the headers I receive from feedburner when executing your code from jsfiddle:

HTTP/1.1 200 OK
Content-Type: text/xml; charset=UTF-8
ETag: ckkcnAejDTcF+4d0Kj6kftZuq+0
Last-Modified: Tue, 30 Jul 2013 19:56:16 GMT
Content-Encoding: gzip
Transfer-Encoding: chunked
Date: Tue, 30 Jul 2013 19:58:11 GMT
Expires: Tue, 30 Jul 2013 19:58:11 GMT
Cache-Control: private, max-age=0
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Server: GSE

If it supported CORS you should see an Access-Control-Allow-Origin header in there

Upvotes: 3

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