Developing virtualhost-aware PSGI applications: Plack::Middleware::MockProxyFrontend | Aristotle [blogs.perl.org]

[masakiplus]

Let’s say you work on a team that runs a web content management system for various different customers. It is hosted at ourcms.com, but each customer’s public content is published on a different domain, which is determined by a setting in the interface, which they can change at will.