I use dasBlog as the vehicle/technology for this site and currently have it configured at the root of the website (so you go to https://kapie.com and you get directly into this blog). This is kind of an unusual setup as most people put it in a /blog subdirectory or virtual directory.
I have plans to put a fair bit more static content up so I wanted to change to the standard of /blog subfolder – the problem is that all my current links will fail when I move the content along with all the content google has cached / indexed about the site – Not Good.
Scott Hanselman suggested in response to a question I posed on the dasBlog mailing list that writing a HttpModule with a HTTP temporary redirect (HTTP response code 302) might be the way to go and reckoned it might only be a handful of lines of code….
I was pleasantly surprised at how easy it was…
I have included the code below in case anyone else might find it useful. It is pretty specific at the moment (takes the requested URL and if it does not include /blog/ then it insert it) but it could easily by made generic (RegEx or the like).
Happy to share the actual source files if anyone wants them – drop me a mail/comment.
using System;
using System.Web;
using System.Text;
namespace KH
{
public class Redirector : IHttpModule
{
private EventHandler onBeginRequest;
public Redirector()
{
onBeginRequest = new EventHandler(this.HandleBeginRequest);
}
void IHttpModule.Dispose() { }
void IHttpModule.Init(HttpApplication context)
{
context.BeginRequest += onBeginRequest;
}
private void HandleBeginRequest(object sender, EventArgs evargs)
{
HttpApplication app = sender as HttpApplication;
if (app != null)
{
string host = app.Request.Url.Host;
string requestUrl = app.Request.Url.PathAndQuery;
if (requestUrl.IndexOf(“/blog/”) == -1)
{
Uri newURL = new Uri(app.Request.Url.Scheme + “://www.” + host + “/blog” + requestUrl);
app.Context.Response.RedirectLocation = newURL.ToString();
app.Context.Response.StatusCode = 302;
app.Context.Response.End();
return;
}
else
{
return;
}
}
}
}
}