P3P Header Info in MVC

Question

I\'m not sure where I\'m suppose to put this in my Asp.net MVC website:

HttpContext.Current.Response.AppendHeader(\"P3P\", \"CP=\\\\\\\"IDC DSP COR ADM DEVi          


        

Answer 1

You should create a class that inherits ActionFilter and overrides OnResultExecuting() to add that header.

Then, add it to the global filters collection.

Answer 2

Assuming you want this header on every response, something like this should do it

public class P3PHeaderAttribute : ActionFilterAttribute
{
    public override void OnActionExecuted(ActionExecutedContext filterContext)
    {
        filterContext.HttpContext.Response.AppendHeader("P3P", "CP=\\\"IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT\\\"");

    }
}

then add the filter to the global collection

    public static void RegisterGlobalFilters(GlobalFilterCollection filters)
    {
        filters.Add(new P3PHeaderAttribute());
    }

Answer 3

You can put it in the web.config:

  <system.webServer>
    <httpProtocol>
      <customHeaders>
        <add name="P3P" value='CP="CAO PSA OUR"'/>

This way you do not need to put it in the code.

See this SO answer for details on what the value means.