Rewriting the URL using IHttpHandlerFactory

mcleanap — Mon, 29 Jun 2009 01:11:53 GMT

I am using the following post (http://www.uberasp.net/getarticle.aspx?id=49) to process url rewrites on our website. I am fairly new to .NET development, so I was curious if this is a good way to do the URL rewrite.

1. Would there be any issues with post back? I don't see that there are.

2. Would these URLs be properly indexed by search engines?

3. Any other issues that I should be aware of?

I have modified the code somewhat to hopefully fit my needs. Do you see any issues with it?

In the web.config file, I changed it to look for any file in the root with an aspx extension.

In the MyPageFactory class, I fill a list of pages that I wouldn't want the URL rewrite to apply to.

using System;
using System.Collections.Generic;
using System.IO;
using System.Web;
using System.Web.UI;

public class MyPageFactory : IHttpHandlerFactory
{
    public IHttpHandler GetHandler(HttpContext context, string requestType, string url, string pathTranslated)
    {
        string pageName = "~/Default.aspx";

        List<string> pageList = new List<string>();

        pageList.Add("contact");
        pageList.Add("login");
        pageList.Add("forgotpassword");

        context.Items["fileName"] = Path.GetFileNameWithoutExtension(url).ToLower();
        string fileName = context.Items["fileName"].ToString();

        if (pageList.Exists(delegate(string s) { return s == fileName; }))
        {
            pageName = "~/" + fileName + ".aspx";
        }
        else
        {
            pageName = "~/Default.aspx";
        }

        return PageParser.GetCompiledPageInstance(url, context.Server.MapPath(pageName), context);
    }

    public void ReleaseHandler(IHttpHandler handler)
    {

    }
}

HttpHandlers and HttpModules

Rewriting the URL using IHttpHandlerFactory