Restful WCF bad request error - wcf

Question

I have a simple resftul wcf service. The .svc file looks like this
<%# ServiceHost Service="NameSpace.RestfulService" Factory="System.ServiceModel.Activation.WebServiceHostFactory" %>
The interface method declaration
[OperationContract]
[WebInvoke(Method = "POST", UriTemplate = "test2", RequestFormat = WebMessageFormat.Json,ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare)]
List<MyObj> Test2(MyObj test);
Method implementation
public List<MyObj> Test2(MyObj test)
{
return new List<MyObj>() { new MyObj() { MyObjId = "1", RowVersion = 1 }, new MyObj() { MyObj= "2", RowVersion = 2 } };
}
Method on a wpf client to call the service
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(MyObj));
MemoryStream ms = new MemoryStream();
serializer.WriteObject(ms, new MyObj() { MyObjId = "A", RowVersion = 1 });
string jason = Encoding.Default.GetString(ms.ToArray());
//get a handle to the request stream to write data to it
WebRequest myRequest = WebRequest.Create("http://localhost/MyService.svc/test2");
myRequest.Method = "POST";
myRequest.ContentType = "application/jason; charset=utf-8";
StreamWriter sw = new StreamWriter(myRequest.GetRequestStream());
sw.Write(jason);
sw.Close();
//get a handle to the response stream from the server to read the response
WebResponse myResponse = myRequest.GetResponse();
DataContractJsonSerializer RecData = new DataContractJsonSerializer(typeof(List<MyObj>));
var result = (List<MyObj>)RecData.ReadObject(myResponse.GetResponseStream());
When I try to get the RequestStream "myRequest.GetRequestStream()" it says bad request error 400.
Any idea what might be causing this error?
Thanks

Answer 1

Your content type is "application/jason; charset=utf-8". JSON's MIME-type is "application/json" (no 'a'). This is my likely why it 400's when you send the initial headers (which is done when you call GetRequestStream) because the WCF service doesn't recognize the content-type and immediately rejects the request.