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RssActionResult.cs

using System.Xml;
using System.Xml.Linq;
using Microsoft.AspNetCore.Mvc;
using Nop.Core.Rss;

namespace Nop.Web.Framework.Mvc;

/// 
/// RSS action result
/// 
public partial class RssActionResult : ContentResult
{
    /// 
    /// Ctor
    /// 
    /// Syndication feed
    /// Feed page url for atom self link
    public RssActionResult(RssFeed feed, string feedPageUrl)
    {
        ContentType = "application/atom+xml";
        Feed = feed;

        //add atom namespace
        XNamespace atom = "http://www.w3.org/2005/Atom";
        Feed.AttributeExtension = new KeyValuePair(new XmlQualifiedName("atom", XNamespace.Xmlns.NamespaceName), atom.NamespaceName);
        //add atom:link with rel='self' 
        Feed.ElementExtensions.Add(new XElement(atom + "link", new XAttribute("href", new Uri(feedPageUrl)), new XAttribute("rel", "self"), new XAttribute("type", "application/rss+xml")));
    }

    /// 
    /// Feed
    /// 
    public RssFeed Feed { get; set; }

    /// 
    /// Execute result async
    /// 
    /// ActionContext
    /// A task that represents the asynchronous operation
    public override Task ExecuteResultAsync(ActionContext context)
    {
        Content = Feed.GetContent();
        return base.ExecuteResultAsync(context);
    }

    /// 
    /// Execute result
    /// 
    /// ActionContext
    public override void ExecuteResult(ActionContext context)
    {
        Content = Feed.GetContent();
        base.ExecuteResult(context);
    }
}