Plack is a set of tools for using the PSGI stack. It contains middleware components, a reference server and utilities for Web application frameworks. Plack is like Ruby's Rack or Python's Paste for WSGI. See PSGI for the PSGI specification and PSGI::FAQ to know what PSGI and Plack are and why we need them.
WWW: http://search.cpan.org/dist/Plack/
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