Filters (1)

• Before version 0.10, filters were simple callbacks: code references added by hand

• Version 0.10 brought HTTP::Proxy::HeaderFilter and HTTP::Proxy::BodyFilter

  • they are object classes

  • they define an API

  • the class determines on which part of the message they are applied

  • every filter used by HTTP::Proxy must be a subclass of one of those

  • "standard" filters are all lowercase

• HTTP::Proxy::HeaderFilter::standard is used for all standard headers (removing hop-by-hop headers, adding Via: headers, etc.)