Related Works

• SQUID
  It is a high-performance proxy caching server for web clients, supporting FTP, gopher, and HTTP data objects. Unlike traditional caching software, Squid handles all requests in a single, non-blocking, I/O-driven process.
  
  
• iProxy
  iProxy by AT&T is a classical example of a programmable proxy that allows accessing, caching, and processing of Web data. Besides the standards caching mechanisms, it also offers tools for processing the HTTP data flow by writing Java classes or writing scripts in a specifically designed script language.
  
  
• Muffin
  Muffin is a World Wide Web filtering system written entirely in Java that can filter any HTTP data sent and received by your web browser. Users can write their own filters in Java using the provided filter interfaces.
  
  
• OPES
  An important direction toward standardization is being conducted by the IETF Working Group for ``Open Pluggable Edge Services'' (OPES). Their goal is to define an open standard that allows intermediaries to provide services on the data flow.