Improve error messages in parsers

**Feature request**
It would be great to have compression for handlers.

**Use case**
Many users need this functionality for production deployments.

**Implementation idea**
Add a new config option `enable_compression` with default `false`.

Start by locating the parser and handler configuration entry points, then inspect existing config options and their tests. Clarify which handlers should support compression and how the new enable_compression option affects them; done means the option defaults to false and the intended production behavior is covered by tests.

Written by the indexing model from the issue text.