Page canonicals

Kurt Muller asked on August 8, 2018 16:07

Hi guys

I've seen many variations of this question been answered but nothing that resolves my issue:

I see some common practices where people use {%CurrentDocument.AbsoluteURL%} to pull in the canonical, but this only seems to work if you're either setting up a one domain site or your cultures are configured to make use of language prefixes and not to force the domain culture.

I'd like to get a canonical that gives me both the page path together with it's current culture domain alias.

Is this at all possible?

Thanks Kurt

kentico 10 kentico 1

Recent Answers

Brenden Kehren answered on August 8, 2018 17:27

I'd suggest making a webpart for it because the NodeAliasPath will not be the correct path all the time. The simple webpart I use/create is below. The DocumentURLProvider.GetUrl() method gets the URL with the language code, if there is one.

ASCX:

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="~/CMSWebParts/Custom/CanonicalLinks.ascx.cs" Inherits="CMSWebParts_Custom_CanonicalLinks" %>

Code behind:

using System;
using System.Web;
using System.Web.UI;
using CMS.Helpers;
using CMS.DocumentEngine;
using CMS.PortalEngine.Web.UI;

public partial class CMSWebParts_Custom_CanonicalLinks : CMSAbstractWebPart
{
    public string PageExtension
    {
        get
        {
            return ValidationHelper.GetString(GetValue("PageExtension"), "");
        }
        set
        {
            SetValue("PageExtension", value);
        }
    }

    protected override void OnPreRender(EventArgs e)
    {
        base.OnPreRender(e);

        if (this.StopProcessing)
        {
            // do nothing
        }
        else
        {
            string nodeAliasPath = DocumentContext.CurrentDocument.NodeAliasPath.ToLower();
            string currentUrlPath = RequestContext.CurrentURL.ToLower();
            if (nodeAliasPath != currentUrlPath)
            {
                this.Page.Header.Controls.Add(new LiteralControl("<link rel=\"canonical\" href=\"" + URLHelper.GetAbsoluteUrl(DocumentURLProvider.GetUrl(DocumentContext.CurrentDocument.NodeAliasPath) + PageExtension) + "\" />" + Environment.NewLine));

            }
        }
    }
}

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