Clear Redis cache and Cloudflare cache on publish of Sitecore items

To clear Cloudflare and Redis cache upon publishing a Sitecore page, you can use the following approach:

Step 1: Handle the publish:end Event

Create a custom event handler in Sitecore to listen for the publish:end event. This will trigger the cache-clearing process.

using Sitecore.Events;
using System.Net.Http;

public class PublishEndHandler
{
    public void OnPublishEnd(object sender, EventArgs args)
    {
        // Get the published item
        var item = Event.ExtractParameter(args, 0) as Sitecore.Data.Items.Item;
        if (item == null) return;

        // Clear Cloudflare cache
        ClearCloudflareCache(item);

        // Clear Redis cache
        ClearRedisCache(item);
    }

    private void ClearCloudflareCache(Sitecore.Data.Items.Item item)
    {
        string url = "https://api.cloudflare.com/client/v4/zones/{zone_id}/purge_cache";
        string json = "{\"files\":[\"" + item.Paths.FullPath + "\"]}";

        using (var client = new HttpClient())
        {
            client.DefaultRequestHeaders.Add("X-Auth-Email", "your-cloudflare-email");
            client.DefaultRequestHeaders.Add("X-Auth-Key", "your-cloudflare-api-key");
            client.DefaultRequestHeaders.Add("Content-Type", "application/json");

            var response = client.PostAsync(url, new StringContent(json)).Result;
            // Handle response
        }
    }

    private void ClearRedisCache(Sitecore.Data.Items.Item item)
    {
        // Assuming Redis connection is already established
        var redisKey = $"sitecore_{item.ID}";
        var redisConnection = RedisConnectionHelper.Connection.GetDatabase();
        redisConnection.KeyDelete(redisKey);
    }
}

Step 2: Register the Event Handler

Register your custom handler in the web.config:

<configuration>
  <sitecore>
    <events>
      <event name="publish:end">
        <handler type="YourNamespace.PublishEndHandler, YourAssembly" method="OnPublishEnd"/>
      </event>
    </events>
  </sitecore>
</configuration>

Explanation

• Cloudflare Cache Clearing: The ClearCloudflareCache method sends a request to Cloudflare’s API to purge the cache for the specific page.

• Redis Cache Clearing: The ClearRedisCache method deletes the Redis key associated with the Sitecore item.

This setup automatically clears the Cloudflare and Redis caches whenever a page is published, ensuring that users see the most up-to-date content.