jQuery cross domain post to WCF 4.0 REST service

Question

I'm trying to post JSON data from JQuery to a cross domain WCF 4.0 REST service and cannot get past the cross domain aspect. Here's my REST method:

    [OperationContract]
    [WebInvoke(Method = "*",
         BodyStyle = WebMessageBodyStyle.Bare,
         RequestFormat = WebMessageFormat.Json
         ResponseFormat = WebMessageFormat.Json,
         UriTemplate = "Save")]
    DataContract Save(DataContract dataContract);

Here's my jQuery code:

$.ajax(
{
type: 'POST',
url: url,
data: JSON.stringify(data),
dataType: 'json',
contentType: 'application/json',
success: function(data)
{
    alert('success');
},
error:function (xhr, ajaxOptions, thrownError)
{
    alert(xhr.status);  
    alert(thrownError);
} });

I've stumbled across this post but could not get it to work. Please help.

Thanks

Tom

score 0 · Accepted Answer · answered Oct 19 '11 at 19:39

For what it's worth, in IIS 7, I created a "sub application" to my web site named "Rest" and pointed it to where my WCF Rest Service code lives (in my case C:\inetpub\wwwroot\RestServices). Then I changed all of my service calls in my website to use the same domain but appended "\Rest\" to the URL.

URL to website: http://local.companyapp.com/

URL to REST Services: http://local.companyapp.com/Rest/ServiceLibrary/Save

Before, I was trying to access: http://local.RestServices.com/ServiceLibrary/Save

It wasn't working because it was a different domain(local.RestServices.com) it was failing. Changing IIS to have a "sub application" named "Rest" that points to where my Rest Services resides fixes the problem.

I'm not sure what issue I will run into once I'm ready to promote this to production. On the surface I like this approach because it doesn't force me to modify my code to handle the weirdness surrounding cross domain requests.

Any comments on this is much appreciated. Thanks

jQuery cross domain post to WCF 4.0 REST service

1 Answers1