Figure 8: Jigsaw Proxy Configuration with HTTPQoS Filter 

Typically the ProxyFrame is configured to run with a CacheFilter to enable caching or 

ICPFilter to allow the proxy to support the Internet Caching Protocol. ICP is a lightweight 

message format used for communication among Web caches [21]. However, the function of 

the proxy that was required in the situation here was to be able to monitor HTTP requests 

and replies so these filters were not enabled. A custom filter (HTTPQoS), shown in the 

previous diagram, was designed to enable the capturing of the appropriate parameters 

required as discussed in the Chapter 3 of this dissertation. The details of this filter will be 

described next and followed by its use in the overall proxy architecture. 

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