Solve CORS problem

Add option handler below

if (context.Request.HttpMethod.ToLower().Equals("options")) {

context.Response.StatusCode = 200;

context.Response.KeepAlive = false;

context.Response.Headers.Add("Access-Control-Allow-Origin: *");

context.Response.Headers.Add("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");

context.Response.Headers.Add("Access-Control-Allow-Methods: GET, POST, PUT");

byte[] b = Encoding.UTF8.GetBytes("SUCCESS");

context.Response.ContentLength64 = b.Length;

var output = context.Response.OutputStream;

output.Write(b, 0, b.Length);

context.Response.Close();

}