Could not add Access-Control-Allow-Origin to my WCF library Project

Question

I\'m trying to understand why this ajax called doesn\'t work

 $.ajax({
        type: \'GET\',
        url: \"http://localhost:8732/Design_Time_Addresses/InMotion         


        

Answer 1

Put this in the service side of your configuration file

<system.webServer>
<httpProtocol>
  <customHeaders>
    <add name="Access-Control-Allow-Origin" value="*" />
  </customHeaders>
</httpProtocol>
</system.webServer>

It works for me! Thanks!

Answer 2

I was getting the same problem when working with my WCF service directly in Visual Studio, in Chrome and Firefox. I fixed it with the following:

Edit the Global.asax file with below function:

            private void EnableCrossDomainAjaxCall()
            {
                HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", "*");

                if (HttpContext.Current.Request.HttpMethod == "OPTIONS")
                {
                    HttpContext.Current.Response.AddHeader("Access-Control-Allow-Methods", "GET, POST");
                    HttpContext.Current.Response.AddHeader("Access-Control-Allow-Headers", "Content-Type, Authorization, Accept");
                    HttpContext.Current.Response.End();
                }
            }

Then call the function from

    protected void Application_BeginRequest(object sender, EventArgs e)
    {
       EnableCrossDomainAjaxCall();
    }

You can get more information from the following url:

http://blog.blums.eu/2013/09/05/restfull-wcf-service-with-cors-and-jquery-and-basic-access-authentication.

Answer 3

This link would help: http://enable-cors.org/

You need to add the following headers in your response that is sent back to the client:

//Allow all domains

Access-Control-Allow-Origin: *

OR

//Allow specific domains

Access-Control-Allow-Origin: http://example.com:8080 http://foo.example.com

Answer 4

the solution is to create a file Global.asax

protected void Application_BeginRequest(object sender, EventArgs e)
{
    HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", "http://localhost");
    if (HttpContext.Current.Request.HttpMethod == "OPTIONS")
    {
        HttpContext.Current.Response.AddHeader("Access-Control-Allow-Methods", "POST, PUT, DELETE");

        HttpContext.Current.Response.AddHeader("Access-Control-Allow-Headers", "Content-Type, Accept");
        HttpContext.Current.Response.AddHeader("Access-Control-Max-Age", "1728000");
        HttpContext.Current.Response.End();
    }
}

Answer 5

Another way of handling this, which is better for self-hosted services, can be found here.