OutputCache not working

I want to cache the returned data from an activity. For this purpose I am using OutPutCacheAttribute

. Here is my client code:

$(document).ready(function() {
    $.get('@Url.Action("GetMenu", "Home")', null, 
        function(data) {
            parseMenu(data);                  
    });
}

      

        
        
        
      

    

And here is my server code:

[HttpGet]
[OutputCache(Duration = 86400, Location = OutputCacheLocation.Server)] 
public ContentResult GetMenu()
{
    string jsonText = GetData(); //some code
    return new ContentResult
    {
        Content = jsonText,
        ContentType = "text/json"
    };
}

      

        
        
        
      

    

As you can see I am using OutPutCacheAttribute

server caching to respond. But it doesn't work. Every time I load the page an action is called Home/GetMenu

. And it gets called even if I type in the browser address bar directly "localhost / Home / GetMenu". Where am I going wrong?

UPD I created a second activity to test this attribute without debugging. Here is its code:

[HttpGet]
[OutputCache(Duration = 86400, Location = OutputCacheLocation.ServerAndClient, VaryByParam = "none")]
public JsonResult GetJson()
{
    return Json(new 
    { 
        random = new Random().Next(100)
    }, 
    JsonRequestBehavior.AllowGet);
}

      

        
        
        
      

    

I assumed that if the OutputCache attribute is working correctly (and I am using it correctly), then the action is called once and I get the same response each time. But if not, I get different answers every time, because every time a random number is generated. And when I called this action several times, I always got different responses like {"random":36}

, {"random":84}

etc.