Internal linking with a C# HttpModule

I’m still not sure all this relative vs absolute path internal linking stuff I’m reading about in SEO ins’t due to the fact there’s confusion between what an absolute link is vs a link with a fully qualified domain but here’s a http module that will include the fully qualified domain with protocol for all of your internal links.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;
using System.Text;

namespace MvcApplication1
{
     public class AbsolutePathRewriter : IHttpModule
    {
        HttpApplication application;
        #region IHttpModule Members
        public void Dispose()
        {
            //Empty
        }

        public void Init(HttpApplication context)
        {
            context.BeginRequest += new EventHandler(OnBeginRequest);
            application = context;
        }

        #endregion
        void OnBeginRequest(object sender, EventArgs e)
        {
            if (application.Request.AppRelativeCurrentExecutionFilePath.Contains(".aspx"))
            {
                application.Response.Filter = new AbsolutePathRewriterStream(application.Response.Filter);
            }
        }
    }

    public class AbsolutePathRewriterStream : MemoryStream
    {
        private Stream outputStream = null;

        public AbsolutePathRewriterStream(Stream output)
        {
            outputStream = output;
        }

        public override void Write(byte[] buffer, int offset, int count)
        {
            string bufferContent = UTF8Encoding.UTF8.GetString(buffer);
            string absolutePath = HttpContext.Current.Request.Url.Scheme + "://" + HttpContext.Current.Request.Url.Authority;
            bufferContent = bufferContent.Replace("href=\"/", "href=\"" + absolutePath + "/");
            bufferContent = bufferContent.Replace("href='/", "href='/" + absolutePath + "/");
            outputStream.Write(UTF8Encoding.UTF8.GetBytes(bufferContent), offset, UTF8Encoding.UTF8.GetByteCount(bufferContent));
            base.Write(buffer, offset, count);
        }
    }
}