CODEWITHSUNDEEP
c#jqueryajaxwcfcross-domain
Dmitry Radzi
Dmitry Radzi

Reputation: 1

Cross-domain AJAX request to the WCF

I have a hard Microsoft Visual Studio 2008, I want to make cross domain query from your web service to a WCF service, but it does not work.

Ajax code on a web page:

$.ajax (
    url: "http:/сите.com/ApplicationController.svc/HelloPost/"
    type: "POST",
    dataType: "json",
    contentType: "application/json",
    success: function (data) {
        alert (data);
    },
    error: function (jqXHR, textStatus, errorThrown) {
        alert (jqXHR textStatus errorThrown);<br/>
    }
});

But my WCF service:

[OperationContract]
[WebInvoke (Method = "POST", UriTemplate = "HelloPost /", ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare)]
[JSONPBehavior (callback = "callback")]
String GetPostHello (Stream data);

public String GetPostHello (Stream data)
{
    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, Accept");
        HttpContext.Current.Response.AddHeader ("Access-Control-Max-Age", "1728000");
        HttpContext.Current.Response.End ();
        return null;
    }
    return "Hello";
}

When a GET request with the domain it works, but try to make a POST request returns this header:

Content-Type application/json Accept application/json, text/javascript, */*;q=0.01

Help, what could be the problem! Thank you!

Upvotes: 0

Views: 2082

Answers (1)

carlosfigueira
carlosfigueira

Reputation: 87308

For POST requests to be made cross-domain by browsers which support CORS (which is what you're using with the Access-Control headers), prior to the request the browser first sends a preflight request, which is a HTTP OPTIONS request, asking the server whether is ok to send the POST request to it. You can either add another operation which responds to the OPTIONS request, or you can implement full CORS support for WCF - it's not too simple, but I've wrote about it on http://blogs.msdn.com/b/carlosfigueira/archive/2012/05/15/implementing-cors-support-in-wcf.aspx with the steps required to make this work.

Upvotes: 1

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