An access system is disclosed that can provide data to a downstream application. In one embodiment, the data is provided as header variables associated with an HTTP request. Other embodiments can use other protocols and other means for transmitting the data. The data provided to the downstream applications...http://www.google.com.hk/patents/US7134137?utm_source=gb-gplus-share專利 US7134137 - Providing data to applications from an access system
