/etc/proxy.pac

gistfile1.js

// Matches all hosts that start with "local."
// The funky regex matches the port number (if include in the URL)
function FindProxyForURL(url, host) {
  if (shExpMatch(host,"local.*")) {
    port = url.match( /\w+:\/\/[^:]+(:\d+)\// );
    if (port) {
      return "PROXY localhost" + port[1];
    } else {
      return "PROXY localhost";
    }
  }
  return "DIRECT";
}