a database connection does not（A database of opensource HTTP proxies written in python: WebCleaner）

http://webcleaner.sourceforge.net/ Primary features Range of filtering/blocking techniques, html parsing, javascript engine (SpiderMonkey), recognizes known browser attacks, XML DTD for describing filters and rewrite rules Features

From the project page

remove unwanted HTML (adverts, flash, etc.) popup blocker disable animated GIFs filter images by size, remove banner adverts compress documents on-the-fly (with gzip) reduce images to low-bandwidth JPEGs remove/add/modify arbitrary HTTP headers configurable over web interface usage of SquidGuard blacklists antivirus filter module detection and correction of known HTML security flaws Basic, Digest and (untested) NTLM proxy authentication support per-host access control HTTP/1.1 support (persistent connections, pipelining) HTTPS proxy CONNECT and optional SSL gateway support