Efficient JSON communication in ASP.NET MVC

A really short example on how ASP.NET MVC can be used for two-way JSON string communication.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.Mvc;
using SenseNet.ContentRepository.Storage;
using SenseNet.ContentRepository.Storage.Security;
using System.Web.Script.Serialization;
using System.Runtime.Serialization.Json;

namespace SenseNet.Services.ContentStore
public class JsonFilter : ActionFilterAttribute
public string Param { get; set; }
public Type DataType { get; set; }

public override void OnActionExecuting(ActionExecutingContext filterContext)
if (filterContext.HttpContext.Request.ContentType.Contains("application/json"))
DataContractJsonSerializer ser = new DataContractJsonSerializer(DataType);
var data = ser.ReadObject(filterContext.HttpContext.Request.InputStream);
filterContext.ActionParameters[Param] = data;

public class SecurityController : Controller

public ActionResult GetACL(string path)
var node = Node.LoadNode(path);
var acl = node.Security.GetAcl();
return Json(acl);

[JsonFilter(DataType = typeof(SnAccessControlList), Param = "acl")]
public ActionResult SetACL(SnAccessControlList acl)
var node = Node.LoadNode(acl.Path);
return null;


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