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Disable Visitor Group personalization

In EPiServer.CMS.Core.11.8.0 we released a feature (that is somewhat related to GDPR) which is the ability to turn of Visitor Group Personalization for all/some requests. We have not changed the default behavior which is that Visitor Group personalization is enabled but made it possible to control it by registering a component implementing IPersonalizationEvaluator in IOC container. The interface has a single method and looks like:

/// <summary>
    /// Signature for a component that determine if personalization should be performed or not for the current request
    /// </summary>
    /// <remarks>
    /// Registration of an implementation is done by register the implemenation in IOC container
    /// </remarks>
    public interface IPersonalizationEvaluator
    {
        /// <summary>
        /// Determines if current request should be personalized or not
        /// </summary>
        bool Personalize();
    }

There is an builtin implementation for "Do Not Track" header that can be registered. One thing to be aware of for custom implementations is that the implementation is likely to be called once for all request (we cache the request so it is only done once for each request) so any implementation should preferably be fast since it will affect the time on all requests.

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