Javascript cross-domain web request fails with Status=0?

Posted by Tav on Stack Overflow See other posts from Stack Overflow or by Tav
Published on 2010-04-26T01:32:53Z Indexed on 2010/04/26 1:43 UTC
Read the original article Hit count: 399

Filed under:

JavaScript

|

cross-domain

Yes, I know the following code does not work in IE. I know IE expects me to use XDomainRequest() instead. I don't care about that. This is firefox only.

I'm trying to do a cross-domain web request in firefox javascript. I keep getting a status of 0. Does anyone know why?

var url = "http://newyork.craigslist.org";
var xdr = new XMLHttpRequest(); //Yes, I know IE expects XDomainRequest. Don't care
xdr.onreadystatechange = function() { 
  if (xdr.readyState == 4) {
      alert(xdr.status); //Always returns 0! And xdr.responseText is blank too
  }
}
xdr.open("get", url, true);
xdr.send(null);

Shouldn't that work?

© Stack Overflow or respective owner

Related posts about JavaScript

CHAT ROOMs 7 by 6

as seen on Stack Overflow - Search for 'Stack Overflow'
I am looking for chatroom on one page with 7 loggedin users and 6+rows for say 42 users.these users will keep on adding wthnew users.Need urgent help.A PRETTY UNUSUAL Q FOR MOST OF U.What is MORE REQ new features: Usernames are unique to users currently chatting You can see a "currently chatting"… >>> More
Integrating JavaScript Unit Tests with Visual Studio

as seen on Stephen Walter - Search for 'Stephen Walter'
Modern ASP.NET web applications take full advantage of client-side JavaScript to provide better interactivity and responsiveness. If you are building an ASP.NET application in the right way, you quickly end up with lots and lots of JavaScript code. When writing server code, you should be writing… >>> More
Has Javascript developed beyond what it was originally designed to do?

as seen on Programmers - Search for 'Programmers'
I've been talking with a friend about the purpose of Javascript, when and how it should be used, etc. He quoted that: JavaScript was designed to add interactivity to HTML pages [...] JavaScript gives HTML designers a programming tool HTML authors are normally not programmers… >>> More
PHP, javascript, single quote problems with IE when passing variable from ajax post to javascript fu

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi! I have been trying to get this to work for a while, and I suspect there's an easy solution that I just can't find. My head feels like jelly and I would really appreciate any help. My main page.php makes a .post() to backend.php and fetches a list of cities which it echoes in the form of: <li… >>> More
Javascript in XSL that is loaded by Javascript

as seen on Stack Overflow - Search for 'Stack Overflow'
Is there anyway to have javascript run when a XSL sheet has been applied to an XML file by Javascript? I am using a JQuery plugin to apply the sheet to the xml but the javascript that is located inside of the XSL file will not run. I put the Javascript at the bottom of the file and it still does… >>> More

Related posts about cross-domain

ScriptResource.axd Access is denied. Cross-Domain iFrame

as seen on Stack Overflow - Search for 'Stack Overflow'
We have a web page containing an iframe containing a page sharing an authentification cookie with it's parent page. For example the iframe page is on the domain foo.domain.com and the page containing the iframe is on foo2.domain.com. Both share a cookie from domain.com. Authentification works great… >>> More
Cross domain cookie tracking

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, The company I work for has four domains and I'm trying to set up the cookies, so one cookie can be generated and tracked across all the domains. From reading various posts on here I thought it was possible. I've set up a sub domain on one site, to serve a cookie and 1*1 pixel image to all four… >>> More
Flex socket crossdomain

as seen on Stack Overflow - Search for 'Stack Overflow'
I am trying to connect to a socket server from flex. I read, on adobe's documentation, the client automatically sends a "request-policy-file" xml element to the socket before allowing it to be opened, and should receive a policy file. The client sends the xml element as expected, My server receives… >>> More
Display cross domain content in IFrame (IE8)

as seen on Stack Overflow - Search for 'Stack Overflow'
I realized that IE8 does not allow links from cross domains to be displayed in IFrame. It seems like there are only two Header options that Microsoft allows to modify. X-FRAME-OPTIONS : "DENY" (This does not display any IFrame content ) X-FRAME-OPTIONS : "SAMEORIGIN" (Displays content from the… >>> More
Cross domain AJAX requests using YQL

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi , I need to query a locations WOEID and grab the WOEID value from the xml returned. So the user would type e.g. London, UK and I need to load the query as below: http://query.yahooapis.com/v1/public/yql?q=select%20woeid%20from%20geo.places%20where%20text%20%3D%20%22London%2C%20UK%2C%20UK%22&format=xml After… >>> More