def call(env)
path = env["PATH_INFO"].to_s.squeeze("/")
hHost, sName, sPort = env.values_at('HTTP_HOST','SERVER_NAME','SERVER_PORT')
@mapping.each { |host, location, app|
next unless (hHost == host || sName == host \
|| (host.nil? && (hHost == sName || hHost == sName+':'+sPort)))
next unless location == path[0, location.size]
next unless path[location.size] == nil || path[location.size] == ?/
env["SCRIPT_NAME"] += location
env["PATH_INFO"] = path[location.size..-1]
return app.call(env)
}
[404, {"Content-Type" => "text/plain"}, ["Not Found: #{path}"]]
end