def call(env)
status, headers, body = @app.call(env)
if body.respond_to?(:to_path)
case type = variation(env)
when 'X-Accel-Redirect'
path = F.expand_path(body.to_path)
if url = map_accel_path(env, path)
headers[type] = url
body = []
else
env['rack.errors'] << "X-Accel-Mapping header missing"
end
when 'X-Sendfile', 'X-Lighttpd-Send-File'
path = F.expand_path(body.to_path)
headers[type] = path
body = []
when '', nil
else
env['rack.errors'] << "Unknown x-sendfile variation: '#{variation}'.\n"
end
end
[status, headers, body]
end