Clogger is Rack middleware for logging HTTP requests. The log format
is customizable so you can specify exactly which fields to log.
0.0.5 / 2009-09-02
The following variables are now exposed: $request_method,
$content_length and $content_type. Additionally, attempts
to use $http_content_length or $http_content_type will be
remapped to use the non-"$http_"-prefixed variable instead
since the “$http_”-variants of those variables is not allowed