Home/ Questions/Q 8583307
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-11T21:30:12+00:00

according facebook’s Javascript SDK, facebook application should include Channel File on their init code.

  • 0

according facebook’s Javascript SDK, facebook application should include “Channel File” on their init code. as published here:
http://developers.facebook.com/docs/reference/javascript/

i didnt fully understand why they need that, or what should be the content of that file, but im just using their basic example as it may help in some specific issues.

my question is – they said that this ‘channel.html’ file should be cached. and even gave an example of how to cache it with PHP:

 <?php
 $cache_expire = 60*60*24*365;
 header("Pragma: public");
 header("Cache-Control: max-age=".$cache_expire);
 header('Expires: ' . gmdate('D, d M Y H:i:s', time()+$cache_expire) . ' GMT');
 ?>

the thing is, AFAIK, that can’t be done with asp.net since, i cannot put c# code in html file.

so in the meanwhile i just add it hard-coded, like:

<head>
    <meta http-equiv="cache-control" content="max-age=31536000;public" />
    <meta http-equiv="expires" content="31536000" />  
</head>

im not sure that this is the right way to do it, since “expires” should be given in a specific format date.

any ideas how can i do it right?
maybe i can serve facebook ‘channel.aspx’ instead?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Here is how you do it in asp.net per this link:

    1. Create a Generic HTTP Handler (ashx file):

      public class FacebookChannel : IHttpHandler
{

    public void ProcessRequest(HttpContext context)
    {

        HttpResponse response = context.Response;
        response.ClearHeaders();

        const int cacheExpires = 60 * 60 * 24 * 365;
        response.AppendHeader("Pragma", "public");
        response.AppendHeader("Cache-Control", "max-age=" + cacheExpires);
        response.AppendHeader("Expires", DateTime.Now.ToUniversalTime().AddSeconds(cacheExpires).ToString("r"));
        context.Response.ContentType = "text/html";
        context.Response.Write("<script src=\"//connect.facebook.net/en_US/all.js\"></script>");        
    }
    public bool IsReusable { get { return false; } }
}

    Make sure you reference the URL in your FB.init function:

    channelUrl : ‘//WWW.YOUR_DOMAIN.COM/fbchannel.ashx’,

    • 0