Changed

• Allow to use environment variables to configure the caching proxy.

Fixed

• Invalidate the user context cache also when impersonating a user and when stopping to impersonate.

Adjusted configuration definition to avoid deprecation errors with symfony 4.2

Changed

• User context lookup now tags the hash lookup response. The logout listener can now invalidate that tag instead of doing a BAN request. The previous varnish BAN request has been incorrect and banned all cache entries on Varnish.
  The logout handler is now also activated by default for the Symfony HttpCache in addition to Varnish and Noop.

Fixed

• Cache Tagging: It is now possible to use cache tagging without installing the SensioFrameworkExtraBundle. There is a new configuration option tags.annotations.enabled that can be set to false.

Fixed

• Cache Tagging: Clear the SymfonyResponseTagger after we tagged a response.
  Usually PHP uses a new instance for every request. But for example the hash
  lookup when using Symfony HttpCache does two requests in the same PHP
  process.

Added

• New Feature: Support for the max_header_value_length option to split huge tag lists into multiple headers. #483

Fixed

• Cache control on Symfony 4.1 now also works when the Vary header for user_context_hash is already present on the response. #485

• Adjust session_listener to work with Symfony 3.4.12 (symfony/symfony#27467).
• Adjust to configuration builder deprecation from Symfony 4.2

• Adjust session_listener to work with Symfony 3.4.12 (symfony/symfony#27467).

• Support for the Varnish xkey vmod for more efficient cache tagging.
• Autoconfigure/Autowiring support

Fixed

• Regression in the configuration when you explicitly specified the default
  proxy client. This started to be reported as error in 2.3.0 and now works
  again.

• [Symfony HttpCache] You can now configure the Symfony proxy client to
  directly call the HttpCache for invalidation requests instead of executing
  real web requests.
  Use the new configuration option proxy_client.symfony.use_kernel_dispatcher
  and follow the instructions in FOSHttpCache to adjust your kernel and
  bootstrap things accordingly.