csharp 用于ASP.NET MVC的Ajax ActionFilter

Posted 2021-05-12

/*
** ajax request example **
$(document).ready(function() {
     jQuery.ajaxSetup({
          beforeSend: function (xhr) {
                xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
                xhr.setRequestHeader('X-Referrer', location.href);//this will do
                return xhr;
          }
     });
});

*/

[AjaxDetection]
public abstract class SomeController : Controller
{
   public bool IsAjaxRequest { get; set; }
   public string Referrer { get; set; }
}

public class AjaxDetection : ActionFilterAttribute  
{  
    public override void OnActionExecuting(ActionExecutingContext filterContext)  
    {   
        var xController = filterContext.Controller as xController;
        if (xController != null)
        {
            if (filterContext.HttpContext.Request.Headers["X-Requested-With"] != null
                && filterContext.HttpContext.Request.Headers["X-Requested-With"] == "XMLHttpRequest")
            {
                xController.IsAjaxRequest = true;
                xController.Referrer=filterContext.HttpContext.Request.Headers["X-Referrer"]
            }
            else
            {
                xController.IsAjaxRequest = false;
            }
        }
    }
}