Resave media nodes to fix cache problem

SaveMedia.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using umbraco.cms.businesslogic.media;
using umbraco.presentation.umbracobase;

[RestExtension("Media")]
public class SaveMedia
{
    [RestExtensionMethod(allowAll = true)]
    public static string SaveRecursive(int nodeId)
    {
        int nodeCount = 0;
        var node = new Media(nodeId);

        if (node != null && node.Id != 0)
        {
            node.Save();
            nodeCount++;

            var descendants = node.GetDescendants().Cast<Media>();

            foreach (var n in descendants)
            {
                n.Save();
                nodeCount++;
            }
        }

        return string.Format("Saved {0} media nodes.", nodeCount);
    }
}