Listing 1. Automatic Proxy Configuration Script

 1  function FindProxyForURL(url, host) {
 2
 3      if (!isResolvable("proxy.example.com") {
 4              return "DIRECT";
 5      }
 6
 7      if (shExpMatch(host, "*.example.com")) {
 8              return "DIRECT";
 9      }
10
11      if (isInNet(host, "10.0.0.0", "255.0.0.0")) {
12              return "DIRECT";
13      }
14
15      return "PROXY 10.1.1.158:3128; DIRECT";
16  }