URLRedirection Custom HttpRequestProcessor

Question

I am currently trying to build 301 redirect module in sitecore9.trying to receive requested URL .will be verifying in the content tree if requested URL has redirect URL then redirect to the URL with status code 301

Class:

public class RedirectProcessor : HttpRequestProcessor
{
    public override void Process(HttpRequestArgs args)
    {
        if (Sitecore.Context.Item == null)
        {
            var requestedUrl = HttpContext.Current.Request.Url.ToString();
            var requestedPath = HttpContext.Current.Request.Url.AbsolutePath;
            var requestedPathAndQuery = HttpContext.Current.Request.Url.PathAndQuery;
            var db = Sitecore.Context.Database;

Sitecore config:

<processor type="Website.Foundation.Redirect.RedirectProcessor" patch:instead="*[@type='Sitecore.Pipelines.HttpRequest.ItemResolver, Sitecore.Kernel']"/>

I am getting an error page after Sitecore login. I am not sure using ItemResolver is correct or not. what is the pipeline have to used for customizing rendering pipeline

Answer 1

In your configuration, you are overwriting (patch:instead) the Sitecore processor (ItemResolver) responsible for figuring out the context item based on the HTTP request. If you remove that, not much is going to work.

Since your logic applies only when no such context item has been found, your processor should run after (patch:after) the item resolver, like so:

<processor type="Website.Foundation.Redirect.RedirectProcessor"
    patch:after="processor[@type='Sitecore.Pipelines.HttpRequest.ItemResolver, Sitecore.Kernel']"/>

I would add that handling redirections in this way can become surprisingly complex and can drastically impact performance if caching is not properly leveraged. If you have many such redirections, you might consider the use of an existing module such as the excellent URL Rewrite by Andy Cohen.

Update: There is a fork of this project for Sitecore 9, in which the author was kind enough to provide an updated package.